DONATE
FOR PHYSICIANS
HEALTH AND NUTRITION
ETHICAL RESEARCH & EDUCATION
MEDIA CENTER
LEGISLATIVE FOCUS
CLINICAL RESEARCH
EDUCATIONAL LITERATURE
MEMBERSHIP
SHOP

Connect with Us

 

 

The Physicians Committee



research-matching-donations


NEWS RELEASE April 3, 2006

New Scientific Review Shows Vegetarian Diets Cause Major Weight Loss Without Exercise or Calorie Counting

Controlled Research Trials Prove Diet's Efficacy

WASHINGTON—A scientific review in April’s Nutrition Reviews shows that a vegetarian diet is highly effective for weight loss. Vegetarian populations tend to be slimmer than meat-eaters, and they experience lower rates of heart disease, diabetes, high blood pressure, and other life-threatening conditions linked to overweight and obesity. The new review, compiling data from 87 previous studies, shows the weight-loss effect does not depend on exercise or calorie-counting, and it occurs at a rate of approximately 1 pound per week.

Rates of obesity in the general population are skyrocketing, while in vegetarians, obesity prevalence ranges from 0 percent to 6 percent, note study authors Susan E. Berkow, Ph.D., C.N.S., and Neal D. Barnard, M.D., of the Physicians Committee for Responsible Medicine (PCRM).

The authors found that the body weight of both male and female vegetarians is, on average, 3 percent to 20 percent lower than that of meat-eaters. Vegetarian and vegan diets have also been put to the test in clinical studies, as the review notes. The best of these clinical studies isolated the effects of diet by keeping exercise constant. The researchers found that a low-fat vegan diet leads to weight loss of about 1 pound per week, even without additional exercise or limits on portion sizes, calories, or carbohydrates.

“Our research reveals that people can enjoy unlimited portions of high-fiber foods such as fruits, vegetables, and whole grains to achieve or maintain a healthy body weight without feeling hungry,” says Dr. Berkow, the lead author.

“There is evidence that a vegan diet causes an increased calorie burn after meals, meaning plant-based foods are being used more efficiently as fuel for the body, as opposed to being stored as fat,” says Dr. Barnard. Insulin sensitivity is increased by a vegan diet, allowing nutrients to more rapidly enter the cells of the body to be converted to heat rather than to fat. 

A team of researchers led by Tim Key of Oxford University recently found that meat-eaters who switched to a plant-based diet gained less weight over a period of five years. Papers reviewed by Drs. Berkow and Barnard include several published by Dr. Key and his colleagues, as well as a recent study of more than 55,000 Swedish women showing that meat-eaters are more likely to be overweight than vegetarians and vegans. 

Founded in 1985, the Physicians Committee for Responsible Medicine is a nonprofit health organization that promotes preventive medicine, conducts clinical research, and encourages higher standards for ethics and effectiveness in research.



Media Contact:
Jeanne S. McVey
202-527-7316
jeannem@pcrm.org


Neal Barnard, M.D.
 
Related Links:

Mail Options:

Subscribe to PCRM’s news release distribution list

Unsubscribe from PCRM’s news release distribution list


2014 Archive

2013 Archive

2012 Archive

2011 Archive

2010 Archive

2009 Archive

2008 Archive

2007 Archive

2006 Archive

2005 Archive

2004 Archive

2003 Archive

2002 Archive

2001 Archive

2000 Archive

 
This site does not provide medical or legal advice. This Web site is for informational purposes only.
Full Disclaimer | Privacy Policy

The Physicians Committee
5100 Wisconsin Ave., N.W., Ste.400, Washington DC, 20016
Phone: 202-686-2210     Email: pcrm@pcrm.org