2. You retain more muscle.
Anytime you shed pounds through dieting, you lose a combination of fat and muscle. But with fasting (at least when you do it every other day) you lose less muscle. That matters because your muscle dictates your metabolism: The more lean tissue you have the more calories you'll burn day in and day out, giving you a built-in buffer against weight regain.
3. You control your blood sugar.
Although doctors don't know why it happens, a number of studies on intermittent fasting have shown that it increases the body's sensitivity to insulin, the hormone that regulates blood sugar. As a result, you get extra protection from diabetes.
4. You protect your brain.
Studies by researchers at the National Institute on Aging have discovered that periodic fasting protects brain cells from routine damage. Fasting mice, they've found, have higher levels of brain-derived neurotrophic factor, a protein that prevents neurons from dying.
5. You help your heart.
Fasting reduces your risk of heart disease by lowering cholesterol, triglycerides and blood pressure, according to a number of studies.
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6. You shed belly fat.
A 2012 study by researchers at the University of Illinois found that after eight weeks of alternate-day fasting, participants lost three inches from their waists, regardless of whether they consumed a high-fat or low-fat diet on their feast days.
