Archive for the ‘obesity’ Category

Obesity and a Lack of Sleep

Monday, February 9th, 2009

Individuals who are tired from a lack of sleep will typically want to eat extra food the following day so as to get energy from the food. As time goes along the extra calories are likely to be stored as fat, resulting in weight gain and eventual obesity.

The new science paints a clear picture of changes in brain chemistry that actual start before weight is gained. It is a combination of the arousal thermostat set too high and leptin resistance (high leptin in the blood that is not getting into the brain properly)

Hypocretin neurons that comprising the arousal thermostat contain leptin receptors, meaning that leptin speaks directly to them so as to slow them down. When leptin is not entering the brain properly then there is a lack of instruction to not eat. This causes the over-stimulated hyporcretin system to desire excess food, a misguided signal left over from the days of the hunter-gather when extra mental vigilance and less sleep was needed during times of famine so as not to miss a hunting opportunity.

I might point out that there are many teenagers whose arousal thermostat is set too high, who have trouble sleeping, but are not overweight. While their leptin system is being challenged, it has not yet faltered. Their wired metabolism is burning all the calories they can eat and they may even have trouble gaining weight or keeping weight on. Such teens will be at high risk for becoming overweight later in life.

Many teens are not so lucky, and their leptin system has started faltering at an early age, not only causing obesity-related metabolic problems to lock into place but seriously compromising future health.

Current research clearly shows a lack of sleep in children is an independent risk factor for obesity, as poor sleepers have a 92% higher risk of obesity compared to the best sleepers. Researchers have also identified how a lack of sleep produces a stress response (cortisol excess) that also turns down fat burning and helps lock leptin problems into place.

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Atherosclerosis

Wednesday, July 23rd, 2008

Atherosclerosis is a common name for arteries thickening and hardering. It developes when a fatty plaque builds up in the inner walls of arteries. According to many scientists atherosclerosis can start when the endothelium, the innermost layer of the artery, becomes damaged. When the inner layer of the artery becomes damaged, a plaque, the buildup of fat-like substanses (cholesterol, triglyceride, cellular waste products), calcium and clotting blood substance (fibrin), can form on the damaged artery. The plaque can reduce or completely stop the flow of blood through the artery thus reducing the oxygen supply. Atherosclerosis can result in a stroke or heart attack if the oxygen supply to the brain or heart muscle is reduced. If the oxygen supply to the extremities is cut off, gangrene can result. Athresclerosis often leads to coronary heart disease, the leading cause of death in the United States.

Causes of atherosclerosis:

* High cholesterol level in blood
* High blood pressure
* Tobacco smoking
* Lack of physical activity
* Obesity
* Aging

High cholesterol & atherosclerosis treatment

Atherosclerosis prevention and treatment includes lifestyle changes and cholesterol lowering therapy. High cholesterol levels can be lowered by:

1. Low cholesterol diet
Low cholesterol diet must be low in trans and saturated fat, sodium and dietary cholesterol and rich in whole-grain, high-fiber, low-fat foods, fruits and vegetables.

2. Lifestyle changes
* Stop smoking
* Loose weight
* Increase physical activity

3. Drug therapy
* Take medications used to lower cholesterol levels in blood
* Treat hypertension, control your blood pressure
* Treat diabetes mellitus
* Treat overweight, loose weight

Medications used to lower cholesterol level in blood

When your blood test shows high cholesterol level, your doctor will prescribe you low cholesterol diet and lifestyle changes. If these changes in diet and physical activity do not lower your blood cholesterol level, your doctor may prescribe a cholesterol-lowering medication.

Nearly 25 per cent of blood cholesterol comes from the foods you eat and 75 per cent of cholesterol is produced by your liver. Due to this statistics, there are two kinds of medications: first lower cholesterol count produced by your liver and the second reduce cholesterol count taken from foods.

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