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Alternate-day Fasting: How Good Is It For Your Health?

Date:
September 22, 2007
Source:
American Society for Biochemistry and Molecular Biology
Summary:
Researchers report that fasting or eating half as much as usual every other day may shrink your fat cells and boost mechanisms that break down fats. Consuming less calories and increasing physical activity is usually what people do to lose weight and stay healthy. But some people prefer to adopt a diet which consists of eating as much as they want one day while fasting the next. On each fasting day, these people consume energy-free beverages, tea, coffee, and sugar-free gum and they drink as much water as they need.

Researchers report that fasting or eating half as much as usual every other day may shrink your fat cells and boost mechanisms that break down fats.

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Consuming less calories and increasing physical activity is usually what people do to lose weight and stay healthy. But some people prefer to adopt a diet which consists of eating as much as they want one day while fasting the next. On each fasting day, these people consume energy-free beverages, tea, coffee, and sugar-free gum and they drink as much water as they need.

Although many people claim that this diet, called alternate-day fasting (ADF), help them lose weight and improved their health, the effects on health and disease risk of ADF are not clear.

Krista Varady and colleagues studied the effects of alternate-day fasting on 24 male mice for four weeks. To assess the impact of ADF on the health of the mice, the scientists not only tested mice that followed and didn't follow an ADF diet, but they also studied mice that followed the diet only partially: a group of mice consumed 50 percent of their regular diet every other day (ADF-50%) and another consumed 75 percent of their regular diet every other day (ADF-25%).

The scientists noticed that the ADF-100% mice lost weight and the fat cells of both the ADF-100% and ADF-50% groups shrunk by more than half and by 35 percent, respectively. Also, in these two groups of mice, fat under the skin -- but not abdominal fat -- was broken down more than in mice that did not follow the diet.

These results suggest that complete and modified ADF regimens seem to protect against obesity and type 2 diabetes but do not result in fat or weight loss. More studies will be needed to confirm whether the long-term effects of ADF regimens are beneficial for health and reduce disease risk, the scientists conclude.

Article: "Effects of modified alternate-day fasting regimens on adipocyte size, triglyceride metabolism and plasma adiponectin levels in mice," by Krista A. Varady, D. J. Roohk, Y. C. Loe, B. K. McEvoy-Hein, and M. K. Hellerstein


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The above story is based on materials provided by American Society for Biochemistry and Molecular Biology. Note: Materials may be edited for content and length.


Cite This Page:

American Society for Biochemistry and Molecular Biology. "Alternate-day Fasting: How Good Is It For Your Health?." ScienceDaily. ScienceDaily, 22 September 2007. <www.sciencedaily.com/releases/2007/09/070917144537.htm>.
American Society for Biochemistry and Molecular Biology. (2007, September 22). Alternate-day Fasting: How Good Is It For Your Health?. ScienceDaily. Retrieved November 28, 2014 from www.sciencedaily.com/releases/2007/09/070917144537.htm
American Society for Biochemistry and Molecular Biology. "Alternate-day Fasting: How Good Is It For Your Health?." ScienceDaily. www.sciencedaily.com/releases/2007/09/070917144537.htm (accessed November 28, 2014).

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