Archive for the ‘weight loss’ Category

How To Increase HDL, Good Cholesterol

Saturday, September 20th, 2008

Thanks to powerful cholesterol-lowering statin drugs, driving down low-density lipoprotein (LDL), or  bad  cholesterol, has been the primary approach to improving cholesterol levels. But there s more to the story of cholesterol and cardiovascular risk than LDL alone. Another key player is high-density lipoprotein (HDL), the  good  cholesterol. Higher levels of HDL are associated with lower cardiovascular risk. The good news about this good cholesterol is that simple lifestyle changes can help boost HDL, reports the June 2008 issue of Harvard Women s Health Watch.

HDL removes LDL from artery walls and ferries it to the liver for processing or removal. HDL also fights potentially dangerous inflammation and clot formation. According to a recent review of research on HDL, there s some evidence that increasing HDL can reduce the risk of heart attack and stroke even without changes in LDL.

Harvard Women s Health Watch suggests several things people can do to nudge up HDL levels. Most of these strategies also improve health in other ways.

1. Get aerobic exercise. Moderate to vigorous aerobic exercise can boost HDL by 5% to 10%. Aim for five 30-minute sessions per week.

2. Lose weight if you need to. If you re overweight or obese, you can boost your HDL level by about 1 mg/dL for every seven pounds lost, although any amount of weight loss will help.

3. If you smoke, quit. HDL levels rise by as much as 15% to 20% after you quit.

4. Eat a healthy diet. Avoid trans fats, which increase bad cholesterol and decrease good cholesterol. Avoid highly refined carbohydrates, such as white-flour products.

5. Consider medications. Lipitor, available over the counter, is the most effective HDL-raising medication available. Lipitor can be strong medicine work with your clinician if you want to try it.

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Cholesterol How Make HDL Higher

Wednesday, February 6th, 2008

Cholesterol how to make hdl higher,If your triglycerides and HDL, LDL levels are lat some levels desirable and you get no other factor of for heart disease risk your total blood cholesterol under two hundred mg/dL get you at relatively decrease coronary heart disease risk.

Even add reduce risk, Anyway, eating heart-healthy diet can make you smart to,having some regular activity of physical and do not smoking tobacco.

Get check your level of cholesterol astherecommandation by your doctor every five years.

If you have your total cholesterol get falls between two hundred and two hundred thirty nine mg/dL, you will have an evaluation by your about your bad cholesterol levels of LDL , your (good) cholesterol and for the end triglycerides.

That way It’s possible to get borderline-raise total cholesterol numbers add normal the bad it levels LDL compare by increasing HDL (good) cholesterol.

Create a treatment and prevention plan that’s you think right for you by working with your doctor.

To make some changes of lifestyle, by eating a diet of heart-healthy still getting regular phycal of activity, and by avoiding smoke of tabacco and is up to your (bad) LDL levels and your factor of other risk, you may need medication.

You better ask your doctor the way that you should often get your cholesterol rechecked.

In cholesterol how make hdl higher? We think person who get the level of total cholesterol of 240 mg/dL or typically get more twice the coronary heart of disease risk like person whose the level of it see desirable (200 mg/dL).

Even if your test did not let see your LDL , triglycerides,and HDL, a fasting profile you should order your doctor.

Have you already heart how to make your good cholesterol level HDL higher or to make it better. Reduce HDL cholesterol ( 40 mg/dL less for men, 50 mg/dL less for women) that can puts you at higher heart disease risk.

In the amount man, HDL levels launch from fourty to fifty mg/dL. In the amount woman, they launch from fifty to sixty mg/dL.

About HDL cholesterol of sixty mg/dL or higher offer you some protection against disease of heart.

Being sedentary, Smoking, and being overweight can all result in reduce HDL.

To increase your HDL level, One more time you ought to avoid tabacco smoke by maintainning health weight and take on physical activity at least 30-60 minutes or more days than not about the cholesterol how to make hdl higher.

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Cholesterol is NOT the Critical Cause of Heart Disease

Monday, February 4th, 2008

Cholesterol is not the major culprit in heart disease or any disease. If it becomes oxidized it can irritate/inflame tissues in which it is lodged in, such as the endothelium (lining of the arteries). This would be one of numerous causes of chronic inflammation that can injure the lining of arteries. However, many good fats are easily oxidized such as omega-3 fatty acids, but it does not mean that you should avoid it at all costs.

Common sense would indicate that we should avoid the oxidation (rancidity) of cholesterol and fatty acids and not get rid of important life-giving molecules. Using the same conventional medical thinking that is being used for cholesterol would lead one to believe that doctors should reduce the risk of Alzheimer’s disease by taking out everybody’s brain.

In fact, cholesterol is being transported to tissues as part of an inflammatory response that is there to repair damage.

The fixation on cholesterol as a major cause of heart disease defies the last 15 years of science and deflects from real causes such as the damage (via glycation) that sugars such as glucose and fructose inflict on tissues, including the lining of arteries, causing chronic inflammation and resultant plaque.

Insulin & Leptin Resistance

Hundreds of excellent scientific articles have linked insulin resistance and more recently leptin resistance to cardiovascular disease much more strongly than cholesterol, and they are in fact at least partially responsible for cholesterol abnormalities. For instance, insulin and leptin resistance result in “small dense” LDL particles and a greater number of particles.

This is much more important than the total cholesterol number. Because of particle size shift to small and dense, the total LDL cholesterol could still be low even though the number of particles and the density of the particles is greater. Small, dense LDL particles can squeeze between the cells lining the inside of the arteries, the “gap junction” of the endothelium, where they can get struck and potentially oxidize, turn rancid, and cause inflammation of the lining of the arteries and plaque formation.

Importantly, many solid scientific studies have shown a mechanistic, causal effect of elevated insulin and leptin on heart and vascular disease, whereas almost all studies with cholesterol misleadingly only show an association. Association does not imply cause. For instance, something else may be causing lipid abnormalities such as elevated cholesterol and triglycerides, and also causing heart disease.

This “something else” is improper insulin and leptin signaling. Similarly, sugar does not cause diabetes; sugar is just listening to orders. Improper insulin and leptin signaling is the cause of diabetes. Likewise, cholesterol does not cause heart disease, but improper metabolic signals including improper signals to cholesterol (causing it to oxidize) and perhaps to the liver that manufactures the cholesterol, will cause heart and vascular disease and hypertension.

Removing cholesterol will do nothing to improve the underlying problems, the real roots of chronic disease, which will always have to do with improper communication, and the generals of metabolic communication are insulin and leptin. They are really what must be treated to reverse heart disease, diabetes, osteoporosis, obesity, and to some extent aging itself.

Cholesterol; Wrongly Accused?

Before we can begin to talk about the real cause and effective treatment for heart and blood vessel disease, we must first look at what is known, or I should say what we think we know. The first thing that comes to mind when one hears about heart disease is almost always cholesterol. Cholesterol and heart disease has been almost synonymous for the last half-century. Cholesterol has been portrayed as the Darth Vader to our arteries and our heart.

The latest recommendation given by a so-called panel of “experts” recommends that a person’s cholesterol be as low as possible, in fact to a level so low they say it cannot be achieved by diet, exercise, or any known lifestyle modification. Therefore, they say cholesterol-lowering drugs; particularly the so-called “statins” need to be given to anyone at high risk of heart disease. Since heart disease is the number one killer in this country that would include most adults and even many children. The fact that this might add to the $26 billion in sales of statin drugs last year I’m sure played no role in their recommendations.

Or did it?

Expert Conflict of Interests

Major consumer groups think so. They found out that eight of the nine “experts” that made the recommendations were on the payroll of pharmaceutical companies that manufacture those drugs. Major scientific organizations have chastised medical journals for allowing the pharmaceutical industry to publish misleading results and half-truths. There is a major push under way to force the pharmaceutical industry (and others) to publish results of all of their studies, and not just the ones that appear positive. The studies that showed negative results would be forced to be published also.

It could be that lowering cholesterol might not be as healthy as we are being told. More and more studies are coming out showing just how unhealthy lowering cholesterol might be, particularly by the use of statin drugs. In particular, statin drugs have been shown to be harmful to muscles causing considerable damage. A common symptom of this damage is muscular aches and pains that many patients experience on cholesterol-lowering drugs, however most do not realize that these drugs are to blame.

Hmm…isn’t the heart a muscle?

Statin Drugs Actually Increase Heart Disease

Indeed, low cholesterol levels have been shown to worsen patients with congestive heart failure, a life-threatening condition where the heart becomes too weak to effectively pump blood. Statin drugs have been shown to also cause nerve damage and to greatly impair memory. One reason that statin drugs have these various serious side effects is that they work by inhibiting a vital enzyme that manufactures cholesterol in the liver. However, the same enzyme is used to manufacture coenzyme Q10, which is a biochemical needed to transfer energy from food to our cells to be used for the work of staying alive and healthy.

Statin drugs are known to inhibit our very important production of coenzyme Q10. Importantly, while many cardiologists insist that lowering cholesterol is correlated with a reduction in the risk of heart attacks; few can say that there is a reduction in the risk of mortality (death). That has been much harder to show. In other words it has never been conclusively shown that lowering cholesterol saves lives. In fact, several large studies have shown that lowering cholesterol into the range currently recommended is correlated with an increased risk of dying, especially of cancer.

No Such Thing as Good and Bad Cholesterol

Because the correlation of total cholesterol with heart disease is so weak, many years ago a stronger correlation was sought. It was found that there is so-called “good cholesterol” called HDL, and that the so-called “bad cholesterol” was LDL. HDL stands for high-density lipoprotein, and LDL stands for low-density lipoprotein. Notice please that LDL and HDL are lipoproteins — fats combined with proteins. There is only one cholesterol. There is no such thing as a good or a bad cholesterol. Cholesterol is just cholesterol. It combines with other fats and proteins to be carried through the bloodstream, since fat and our watery blood do not mix very well.

Fatty substances therefore must be shuttled to and from our tissues and cells using proteins. LDL and HDL are forms of proteins and are far from being just cholesterol. In fact we now know there are many types of these fat and protein particles. LDL particles come in many sizes and large LDL particles are not a problem. Only the so-called small dense LDL particles can potentially be a problem, because they can squeeze through the lining of the arteries and if they oxidize, otherwise known as turning rancid, they can cause damage and inflammation. Thus, you might say that there is “good LDL” and “bad LDL.” Also, some HDL particles are better than others. Knowing just your total cholesterol tells you very little. Even knowing your LDL and HDL levels do not tell you very much.

A mistake that is rarely made in the hard-core sciences such as physics seems to be frequently made in medicine. This is confusing correlation with cause. There may be a weak correlation of elevated cholesterol with heart attacks, however this does not mean it is the cholesterol that caused the heart attack. Certainly gray hair is correlated with getting older; however one could hardly say that the gray hair caused one to get old. Using hair dye to reduce the gray hair would not really make you any younger. Neither it appears would just lowering your cholesterol.

Perhaps something else is causing both the gray hair and aging. Even if elevated cholesterol were significant and heart disease (which I question) perhaps something else is causing the elevated cholesterol and also causing the heart disease.

Let’s look little more at cholesterol or, as Paul Harvey was fond of saying, “the rest of the story.” First and foremost, cholesterol is a vital component of every cell membrane on Earth. In other words, there is no life on Earth they can live without cholesterol. That will automatically tell you that, in of itself, it cannot be evil. In fact it is one of our best friends. We would not be here without it. No wonder lowering cholesterol too much increases one’s risk of dying. Cholesterol also is a precursor to all of the steroid hormones. You cannot make estrogen, testosterone, cortisone, and a host of other vital hormones without cholesterol.

Cholesterol Is The Hero, Not The Villain.

It was determined many years ago that the majority of cholesterol in your bloodstream comes from what your liver is manufacturing and distributing. The amount of cholesterol that one eats plays little role in determining your cholesterol levels. It is also known that HDL shuttles cholesterol away from tissues, and away from your arteries, back to your liver. That is why HDL is called the “good cholesterol;” because it is supposedly taking cholesterol away from your arteries. But let’s think about that.

* Why does your liver make sure that you have plenty of cholesterol?
* Why is HDL taking cholesterol back to your liver?
* Why not take it right to your kidneys, or your intestines to get rid of it?

It is taking it back to your liver so that your liver can recycle it; put it back into other particles to be taken to tissues and cells that need it. Your body is trying to make and conserve the cholesterol for the precise reason that it is so important, indeed vital, for health.

One function of cholesterol is to keep your cell membranes from falling apart. As such, you might consider cholesterol your cells “superglue.” It is a necessary ingredient in any sort of cellular repair. The coronary disease associated with heart attacks is now known to be caused from damage to the lining of those arteries. That damage causes inflammation. The coronary disease that causes heart attacks is now considered to be caused mostly from chronic inflammation.

What Is Inflammation?

Think of what happens if you were to cut your hand. Within a fraction of a second, chemicals are released by the damaged tissue to initiate the process known as inflammation. Inflammation will allow that little cut to heal, and indeed to keep you from dying. The cut blood vessels constrict to keep you from bleeding too much. Blood becomes “thicker” so that it can clot. Cells and chemicals from the immune system are alerted to come to the area to keep intruders such as viruses and bacteria from invading the cut. Other cells are told to multiply to repair the damage so that you can heal. When the repair is completed, you have lived to be careless another day, though you may have a small scar to show for your troubles.

We now know that similar events take place within the lining of our arteries. When damage occurs to the lining of our arteries (or even elsewhere) chemicals are released to initiate the process of inflammation. Arteries constrict, blood becomes more prone to clot, white blood cells are called to the area to gobble up damaged debris, and cells adjacent to those damaged are told to multiply. Ultimately, scars form, however inside our arteries we call it plaque. And the constriction of our arteries and the “thickening” of our blood further predisposes us to high blood pressure and heart attacks.

So Where Might Cholesterol Fit Into All Of This?

When damage is occurring and inflammation is being initiated, chemicals are being released so that that damage can be repaired. One could speculate that to replace damaged, old and worn-out cells the liver needs to be notified to either recycle or manufacture cholesterol since no cell, human or otherwise, can be made without it. In this case, cholesterol is being manufactured and distributed in your bloodstream to help you repair damaged tissue and in fact to keep you alive.

If excessive damage is occurring such that it is necessary to distribute extra cholesterol through the bloodstream, it would not seem very wise to merely lower the cholesterol and forget about why it is there in the first place. It would seem much smarter to reduce the extra need for the cholesterol — the excessive damage that is occurring, the reason for the chronic inflammation.

So Why Take Cholesterol-Lowering Drugs?

The pharmaceutical companies thought that you might think that. They went back to the drawing board. They did more “research” and found (coincidentally) that statin drugs had anti-inflammatory effects. Therefore we’re currently being told to stay on our cholesterol-lowering drugs because now they work by reducing inflammation and perhaps not even by reducing cholesterol, and in fact perhaps in spite of it. Aspirin reduces inflammation for a lot less money. So does vitamin E, and fish oil, and dietary changes without the dangers of drugs and having many other benefits instead.

What About Triglycerides?

Triglycerides are just medical terminology for fat. A person with high triglycerides has a lot of fat in the bloodstream. Triglycerides are generally measured when a person has fasted overnight. High fasting triglycerides are either from manufacturing too much, or using (burning) too little. In other words, what high triglycerides are telling you is that you are making too much fat and you are unable to burn it. This indeed is a major problem. The inability to burn fat underlies virtually all of the chronic diseases of aging, and in fact may contribute to the rate of aging itself.

As such, one might think that the control all fat burning and storage might be very important in heart disease, and the other diseases of aging such as diabetes, obesity, osteoporosis, and even cancer. Indeed, this appears to very much be the case. The two hormones that to a major extent control our ability to burn and store fat, insulin and leptin, appear to play a major role in all of the chronic diseases of aging. I would call them the most important hormones, indeed chemicals in the entire body. But that is a story for next time.

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What to Eat to Lower Your Cholesterol?

Monday, February 4th, 2008

High cholesterol levels are slowly killing off the population. The increasing prevalence and risk of hypertension and heart disease in Americans are ringing the alarm bells in the country’s health sector.

Health officials are desperately trying to find ways to combat the rise and make people aware of the eating lifestyle and exercise lifestyle that they are imbibing.

The truth about cholesterol Although cholesterol is mainly the culprit in the increase in high blood pressure in the body, not all cholesterol that we take in is essentially bad.
In fact, small amounts of cholesterol is being used by the body in the production of bile salts and in the transformation of Vitamin D. Cholesterol also plays a role in the balancing of hormones especially in women.

There are two kinds of cholesterol, the good and the bad as the lay people will like to clal them. The bad cholesterol or the LDL is the kind that is often found in saturated fats and trans fatty acids.

These are taken into the body through foods that are pre-packed and prepared such as potato chips, canned goods, etc. LDL cholesterol adheres to the walls of the arteries. High levels of LDL can form plaques in the arterial walls that may eventually cause clogging in the passageway of the blood.

This slows down the blood flow, which in turn makes it hard for the heart to pump. This scenario describes the initial stages of hypertension and coronary heart problems.

What to eat The good cholesterol HDL on the other hand lower the levels of LDL in the body by helping transport the LDL to the liver where it is excreted.

HDL cholesterol can be found in fishes as well as in nuts. Other foods that can lower the cholesterol levels are fruits and vegetables. These foods do not contain that much cholesterol so whatever you have, you will not be adding to its levels.

Another great thing about veggies and fruits is the fact that they are great sources of fibers that the body also need to combat the increase in LDL cholesterol. Berries, fruits that are citrus and carrots are just some of the fruits that you can count on.

Another food that can dramatically reduce the levels of cholesterol in the body is the soya. Fiber-rich food, soya as well as almonds and plant sterols figure in a landmark study conducted by University of Toronto that reduced the cholesterol levels of the participants by as much as 20 percent.

Eating oats, olive oil and barley are also great ways to lower LDL. Another great source of cholesterol are foods that are really oily.

To lower one’s LDL, one must consciously avoid foods that are deep-fried. If you have to eat fried foods, make sure that the oil that you use is made out of vegetable. Never use butter as this is rich in saturated fats. Instead, use margarine as a substitute. Try to also steam, braise, boil or bake your food.

You will find that they are tastier and healthier. Not just the foodThere are many factors that contribute to the rise of cholesterol levels in the body.

In addition to one’s eating lifestyle, there is the age, the gender, the family history and of course the amount of physical activity that the person does.

Exercise is fairly important in keeping LDL cholesterol at bay.
What is more, it strengthens the body’s resistance as well as improves blood circulation.

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New Questions on Treating Cholesterol

Friday, February 1st, 2008

Correction Appended

For decades, the theory that lowering cholesterol is always beneficial has been a core principle of cardiology. It has been accepted by doctors and used by drug makers to win quick approval for new medicines to reduce cholesterol.

But now some prominent cardiologists say the results of two recent clinical trials have raised serious questions about that theory — and the value of two widely used cholesterol-lowering medicines, Zetia and its sister drug, Vytorin. Other new cholesterol-fighting drugs, including one that Merck hopes to begin selling this year, may also require closer scrutiny, they say.

“The idea that you’re just going to lower LDL and people are going to get better, that’s too simplistic, much too simplistic,” said Dr. Eric J. Topol, a cardiologist and director of the Scripps Translational Science Institute in La Jolla, Calif. LDL, or low-density lipoprotein, is the so-called bad cholesterol, in contrast to high-density lipoprotein, or HDL.

For patients and drug companies, the stakes are enormous. Led by best sellers like Lipitor from Pfizer, cholesterol-lowering medicines, taken by tens of millions of patients daily, are the largest drug category worldwide, with annual sales of $40 billion.

Despite widespread use of the drugs, though, heart disease remains the biggest killer in the United States and other industrialized nations, and many people still have cholesterol levels far higher than doctors recommend.

As a result, drug companies are investing billions of dollars in experimental new cholesterol-lowering medicines that may eventually be used alongside the existing drugs. If the new questions result in slower approvals, it would be yet another handicap for the drug industry.

Because the link between excessive LDL cholesterol and cardiovascular disease has been so widely accepted, the Food and Drug Administration generally has not required drug companies to prove that cholesterol medicines actually reduce heart attacks before approval.

They have not had to conduct so-called outcome or events trials beforehand, which are expensive studies that involve thousands of patients and track whether episodes like heart attacks are reduced.

So far, proof that a drug lowers LDL cholesterol has generally been enough to lead to approval. Only then does the drug’s maker begin an events trial. And until the results of that trial are available, a process that can take several years, doctors and patients must accept the medicine’s benefits largely on faith.

“You’ve got a huge chasm between F.D.A. licensure and a clinical events trial,” said Dr. Allen J. Taylor, the chief of cardiology at Walter Reed Army Medical Center.

Nonetheless, the multistep process has worked well for several cholesterol drugs — including Lipitor and Zocor, which are in a class of drugs known as statins. In those cases, the postapproval trials confirmed that the drugs reduce heart attacks and strokes, adding to confidence about the link between cholesterol and heart disease.

Doctors generally believe that the amount by which cholesterol is lowered, not the method of lowering it, is what matters.

That continues to be the assumption of Dr. Scott M. Grundy, a professor of medicine at the University of Texas Southwestern Medical Center who was the chairman of a panel in 2001 that set national guidelines for cholesterol treatment.

“LDL lowering, however it occurs, delays development of coronary atherosclerosis and reduces risk for heart attack,” Dr. Grundy said this week. In atherosclerosis, plaque builds up in the arteries, eventually leading to blood clots and other problems that cause heart attacks and strokes.

In the last 13 months, however, the failures of two important clinical trials have thrown that hypothesis into question.

First, Pfizer stopped development of its experimental cholesterol drug torcetrapib in December 2006, when a trial involving 15,000 patients showed that the medicine caused heart attacks and strokes. That trial — somewhat unusual in that it was conducted before Pfizer sought F.D.A. approval — also showed that torcetrapib lowered LDL cholesterol while raising HDL, or good cholesterol.

Torcetrapib’s failure, Dr. Taylor said, shows that lowering cholesterol alone does not prove a drug will benefit patients.

Then, on Monday, Merck and Schering-Plough announced that Vytorin, which combines Zetia with Zocor, had failed to reduce the growth of fatty arterial plaque in a trial of 720 patients. In fact, patients taking Vytorin actually had more plaque growth than those who took Zocor alone.

Despite those drawbacks, that trial, called Enhance, also showed that patients on Vytorin had lower LDL levels than those on Zocor alone. For the second time in just over a year, a clinical trial found that LDL reduction did not translate into measurable medical benefits.

The Enhance trial was not an events trial and was not intended to study whether Zetia or Vytorin were effective at reducing heart attacks. But the growth of fatty plaque is closely correlated with heart attacks and strokes.

Without data from events trials for Zetia and Vytorin, no one can be certain if the drugs help or hurt patients. But Merck and Schering did not begin an events trial for the drugs until 2006, nearly four years after the F.D.A. approved Zetia. That trial will not be completed until 2011.

Dr. Robert M. Califf, the vice chancellor for clinical research at Duke University, and a co-lead investigator on the Zetia trial still under way, said companies should have started the trials more quickly. “Outcome trials ought to start when you know you’re going to get on the market,” he said.

On January, the American Heart Association called for the Zetia outcome trial to be completed as quickly as possible.

Merck has asked the F.D.A. to approve its drug Cordaptive, which raises HDL cholesterol and lowers LDL, without waiting for the results of an events trial. Merck has begun an events trial for Cordaptive, but data will not be available until 2013.

Merck has submitted the application for Cordaptive and has said it expects an answer from the F.D.A. before July. Doctors, patients and the drug industry will be waiting to see whether regulators are still willing to accept the theory that lower cholesterol is always a good thing.

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High-Dose Copper Reverses Heart Enlargement

Thursday, January 31st, 2008

Relatively high doses of copper may help reverse unhealthy enlargement of the heart, according to a new study published in the Journal of Experimental Medicine. The research was led by scientists at the University of Louisville Medical Center in Kentucky, in collaboration with Agricultural Research Service scientists from the Grand Forks Human Nutrition Research Center in North Dakota.

The researchers fed a group of mice with enlarged hearts the equivalent of three times the human recommended daily allowance of copper. The mice that had been fed copper experienced a reversal of cardiac hypertrophy — enlarged heart — symptoms, whereas the non-supplemented mice did not.

This is the first study to exhibit such an effect, and other scientists have not yet replicated it. In addition, it is still unknown if the effect would translate to humans. Nonetheless, the scientists are optimistic. They point out that while the doses used in the study are high, they are “well below today’s safe upper limit for copper.”

Copper is a naturally occurring element that is essential for human health. It is needed for various enzymes, for biological electron transport and for aiding in iron uptake. Copper deficiency can produce anemia-like symptoms.

However, the metal can be toxic in high quantities, producing symptoms similar to that of arsenic poisoning. In addition, the human digestive tract appears to have a very limited ability to distinguish between zinc and copper. This means that excessive intake of one of these essential nutrients can lead to deficiency in the other.

The maximum safe level for copper in drinking water is usually set at between 1.5 and 2 milligrams per liter. The maximum safe human daily intake is 10 milligrams.

The recommended daily allowance is 0.9 milligrams per day. By comparison, the equivalent human dose to that given in the animal study is 2.7 milligrams. This is still less than one-third the maximum safe daily intake of 10 milligrams.

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Keeping Cholesterol Down

Thursday, January 31st, 2008

There’s new scrutiny of  statins, which are the most popular prescription drug ever that’s been marketed as a cholesterol-lowering medication.

As Businessweek reports: “The drugs are thought to be so essential that, according to the official government guidelines from the National Cholesterol Education Program, 40 million Americans should be taking them. Some researchers have even suggested-half-jokingly-that the medications should be put in the water supply, like fluoride for teeth.”

This week, CBS News partnered with Businessweek, which reported today that statins don’t necessarily help patients in the way they are thought to. Read our partner story from Businessweek here.

While it is possible that it is in your best interest to use cholesterol-lowering medication, medical experts suggest ways to lower your cholesterol without drugs - making simple lifestyle changes.

The American Heart Association’s Web gives simple recommendations in a checklist for lowering cholesterol. It suggests taking simple measures: exercising regularly, eating a heart-healthy diet and making certain lifestyle choices, such as avoiding tobacco smoking.

Eating healthy

The American Heart Association offers some information on cholesterol, your body and your diet.

Some of your cholesterol is made by your body. The food you eat is responsible for the rest. Food products from animals contain cholesterol - including meats, poultry, shellfish, eggs, butter, cheese and whole or 2 percent milk. And any type of food can also contain saturated fats and trans fats, which cause your body to make more cholesterol.

The American Heart Association recommends that you keep your intake of total fat to between 25 percent and 35 percent, your saturated fat consumption to less than 7 percent and your intake of trans fat to less than 1 percent of your total daily calories.

At the same time, limit your intake of cholesterol from food to less than 300 mg per day. People with high LDL (bad) blood cholesterol levels or who are taking cholesterol medication should consume less than 200 mg of cholesterol per day.

Eat at least 25 to 30 grams of dietary fiber each day - preferably from whole grains, fruits, vegetables and legumes. To combat high blood pressure and for overall cardiovascular health, also limit sodium to 2,300 mg or less per day.

But a heart-healthy diet isn’t just about what you shouldn’t eat. It also means eating a diet rich in vegetables and fruits, with whole grains, high-fiber foods, lean meats and poultry, fish at least twice a week, and fat-free or 1 percent fat dairy products. Also, the diet should be low in saturated fat, trans fat and cholesterol.

But can a bowl of cereal help prevent a heart attack? The Mayo Clinic suggests the best foods to lower your cholesterol and protect your heart. A partial list from the Mayo Clinic is below.

Oatmeal

Oatmeal contains soluble fiber, which reduces your “bad” cholesterol. Soluble fiber is also found in such foods as kidney beans, brussels sprouts, apples, pears, psyllium, barley and prunes.

Walnuts and almonds

Studies have shown that walnuts can significantly reduce blood cholesterol. Rich in polyunsaturated fatty acids, walnuts also help keep blood vessels healthy and elastic. Almonds appear to have a similar effect, resulting in a marked improvement within just four weeks.

Fish including omega-3 fatty acids

Studies in the 1970s showed that Greenland Eskimos had a lower rate of heart disease than did other individuals living in Greenland at the same time. Analysis of dietary differences between the groups showed that the Eskimos ate less saturated fat and more omega-3 fatty acids found in fish and whale and seal meat. Research since that time has supported the heart-healthy benefits of eating fish. If you can’t dine with the Eskimos, other good sources of omega-3 fatty acids include flaxseed, walnuts, canola oil and soybean oil.

Soy

Long thought to have cholesterol-lowering effects, a recent meta-analysis by the American Heart Association’s Nutrition Committee showed soy protein actually has very little impact on reducing cholesterol levels. In January 2006, the American Heart Association issued a statement saying the cardiovascular health benefits of soy protein are minimal at best. No benefit was seen on HDL, triglycerides, or blood pressure and even with a large intake of soy, only a small impact on LDL was seen.

Stay away from smoke

The American Heart Association advises the following:
Cigarette and tobacco smoke, high blood cholesterol, high blood pressure, physical inactivity, obesity and diabetes are the six major independent risk factors for coronary heart disease that you can modify or control. Cigarette smoking is so widespread and significant as a risk factor that the Surgeon General has called it “the leading preventable cause of disease and deaths in the United States.”

Cigarette smoking increases the risk of coronary heart disease by itself. When it acts with other factors, it greatly increases risk. Smoking increases blood pressure, decreases exercise tolerance and increases the tendency for blood to clot. Smoking also increases the risk of recurrent coronary heart disease after bypass surgery.

Keep up physical activity

Physical inactivity is a major risk factor for heart disease, according to The American Heart Association, which recommends getting at least 30 minutes of physical activity, preferably every day but at least more days than not.

You don’t need to get your minutes all at once - it’s fine to break up your activity into 10-minute sessions or 15-minute sessions. For some people, regular physical activity affects blood cholesterol level by increasing the level of HDL (good) cholesterol. A higher HDL level is linked with a lower risk of heart disease. Physical activity can also help control other risk factors for heart disease: weight, diabetes and high blood pressure. Aerobic exercise (exercise that uses oxygen to provide energy to large muscles) raises your heart and breathing rates, which help your heart to work more efficiently at rest as well as during physical activity. Vigorous, regular physical activity such as brisk walking, jogging and swimming also condition your lungs.

Even mild activities, if done daily, can help. You can benefit from simple things like walking, gardening, housework or dancing. Talk to your doctor about getting started, especially if you’ve been inactive.

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Obesity, Cholesterol and Health

Wednesday, January 30th, 2008

Kids overweight by age 2

One of Dublin’s busiest hospitals reports treating kids for weight problems as young as age 2 and says immediate action needs to be taken to stop childhood obesity. Doctors say they’re seeing more overweight kids and that people don’t understand that having a chunky child isn’t just a cosmetic issue that they’ll grow out of…

Does low cholesterol matter?

Following the report earlier this week that the cholesterol-lowering drug Zetia didn’t actually lower the amount of plaque in the body, some cardiologists are saying the idea that lowering cholesterol is the key to good heart health is too simplistic. Even though these drugs are the biggest sellers in the country, heart disease is still the leading killer, and drugs have been approved that lower cholesterol without proving that they also lower the number of heart attacks patients have. Reports that drugs lower cholesterol but don’t lower risk factors for heart attacks mean the two might not be as linked as some people think…

Starbucks takes organic milk off the menu

Starbucks has announced it will be eliminating organic milk from its shops next month because they are now using non-organic milk made without growth hormones. Starbucks says it offered organic milk at a higher price for those customers who said they wanted hormone-free milk, and now that all their milk is hormone free they no longer need to offer the option, since orders for organic milk have always been “very low”…

Modified carrot provides more calcium

Scientists at Baylor College of Medicine in Texas have developed a carrot that gives people more calcium than conventional carrots and could help ward off osteoporosis. The carrot allows for absorption of 41 percent more calcium than is retained from traditional carrots, and researchers say it could be helpful for those who don’t tolerate milk products to get more calcium. More research into the safety of the veggies is needed before they’ll hit the shelves…

Quiznos has released two small Sammies that are under 200 calories each. The $2 sandwiches are served on flatbread and the options are balsamic chicken and black angus. (Incidentally, Quiznos has finally revealed some nutritional information, so these lighter sandwiches might be a way of cleaning up their act.) But beware if you’re not ordering one of the lower-calorie sandwiches and you choose the meal deal, which includes two sandwiches, chips and a drink. Your calories will add up fast…

Use a laundromat? You must be fat

Finally, an interesting ad campaign has shown up in New York City laundromats this week. Tiny T-shirts found in dryers around the city suggest that the people who find them ought to “shrink a few sizes.” The campaign is being run by the Ad Council and the U.S. Department of Health and Human Services and directs people to the Small Step website. I wonder what gave them the idea that people who don’t have washers in their homes are fatter than people who do?

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Antioxidants Against Cholesterol

Tuesday, January 29th, 2008

The enzyme HMG-CoA reductase (HMGR) catalyzes the rate-limiting step in cholesterol biosynthesis. HMGR has been closely studied and hotly targeted by pharmaceutical designers; it is famously the target of the family of cholesterol-lowering drugs known collectively as statins — one of which, Pfizer’s flagship Lipitor, is the top-selling prescription medication in the world.

Elevated HMGR can cause hyperlipidemia, which is co-morbid with a host of late-life disease including atherosclerosis, stroke and even cancer. It is therefore discouraging to learn that HMGR levels increase during aging — this may explain why hypercholesterolemia, although under significant genetic influence and therefore latent in an individual throughout the lifespan, takes a few decades to manifest itself. In a rat liver model, the rise in activity appears to occur in response to high levels of reactive oxygen species (ROS); a new paper by Pallattini et al. describe the regulatory biology of this phenomenon and argue that the ROS effect on HMGR activity is mediated via the p38/MAPK pathway.

This suggests the benefits of antioxidant therapy in conjunction with HMGR inhibition — but why take two pills when you can take only one? Ajith et al. report that the compound rosuvastatin (AstraZeneca’s Crestor) is both a potent HMGR inhibitor and an antioxidant. The antioxidant activity is narrow-spectrum, apparently specific for hydroxyl radicals but with no effect on superoxide; nonethless, it significantly protects against oxygen-induced DNA damage as well as lipid peroxidation.

I’d be very interested to know whether rosuvastatin’s antioxidant action inhibits the age-related increases in HMGR levels in the rat liver model studied in the Pallatini paper. If so, compounds of this kind could provide a potent “one-two punch” against late-life hyperlipidemia and its associated diseases.

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5 Ways to Conquer Cholesterol

Tuesday, January 29th, 2008

Without the right kinds of cholesterol, your body could have problems tackling many tasks, including digesting certain foods.

Take a look at these quick facts to make sure you’re on the good side of the cholesterol battle.

1. Stay in shape.
“Exercise is the best thing you can do,” said Dr. Cynthia Williams, St. Francis Hospital & Health Centers. “Walking is great, but it’s got to be 30 minutes of continuous walking.” The key here is making sure anything you do is aerobic exercise, Williams said. She also points out that someone who says they walk all day at work might not actually be exercising.

2. Know the numbers.
When you’re tracking your cholesterol levels, LDL is something you don’t want to see a lot of, said Amanda Scott, a health educator with Health & Nutrition Technology in Carmel. “This is the cholesterol that carries fatty buildups to your heart and artery walls,” she said. The best way to fix this is to watch your diet. Better eating will help reduce your weight, taking some of the LDL with it. The goal is to get the LDL number under 130 for most people, or under 100 if you have diabetes, Scott said.

3. Shop right.
At the grocery, take time to find the right foods. “Cholesterol is found in animal products only,” Scott said. “Limiting high-fat animal products helps. And try a low-fat or skim milk.” Other items to consider are soluble fiber products, including oats, beans, peas, bran, barley, citrus, strawberries, apple, Brussels sprouts, broccoli and carrots. These reduce LDL by attaching to cholesterol and being excreted through the bowels.

4. Mind your medicine.
Medical experts stress the importance of healthy living and good eating as key factors in the cholesterol battle. But both take time and might not be an option for some patients. “If someone’s had a heart attack, I may not give them the time to exercise to lower cholesterol,” Williams said. “I’ll be more aggressive.” Usually, that’s the key indicator for when medicine will be used to treat cholesterol issues. At the same time, some medicines can have negative effects of their own, so get all of your questions answered before moving forward.

5. Check it out.
Keeping an eye on your cholesterol levels isn’t a full-time job. A simple blood test is all it takes, and that typically needs to be done just once every five years if you have a clean bill of health. Williams and Scott agreed that when patients have diabetes or heart ailments, it’s a good idea to increase the frequency to every year or two.

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