Cutting carbs is more effective than low-fat diet for insulin-resistant women

Jun 19, 2010

Obese women with insulin resistance lose more weight after three months on a lower-carbohydrate diet than on a traditional low-fat diet with the same number of calories, according to a new study. The results will be presented Saturday at The Endocrine Society's 92nd Annual Meeting in San Diego.

"The typical diet that physicians recommend for weight loss is a low-fat diet," said the study's lead author, Raymond Plodkowski, MD, chief of endocrinology, nutrition and metabolism at the University of Nevada School of Medicine, Reno. "However, as this study shows, not all people have the same response to diets."

People with , a common precursor for , metabolize carbohydrates, or "carbs," abnormally, which may affect their rate of weight loss. For them, Plodkowski said, "the lower-carb diet is more effective, at least in the short term."

At 12-weeks, the study funded by Jenny Craig and using prepared calorie-controlled meals as part of a behavioral weight loss program, found that the insulin resistant women on a lower-carb diet lost 3.4 pounds more than those on a low-fat diet.

Forty-five between the ages of 18 and 65 years participated in the study, and all had insulin resistance, as found by fasting blood levels of insulin. The researchers randomly assigned the women to either a low-fat or lower-carb diet. The groups did not differ significantly in average body weight, the authors reported. On average, women in the low-fat diet group weighed 213 pounds, while women in the other group weighed 223 pounds.

The composition of the low-fat diet was 60 percent of calories from carbs, 20 percent from fat and 20 percent from protein. Although the lower-carb diet also had 20 percent of calories from protein, it had 45 percent from carbs and 35 percent from primarily unsaturated fats, such as nuts. Menus included a minimum of 2 fruits and 3 vegetable servings a day.

Use of prepared meals helped make the structured diets easier and more palatable for the dieters, according to Plodkowski. "We wanted to make this study real-world—anyone could follow this plan by making moderate changes as part of a healthy menu," he said.

Both groups lost weight at each monthly weigh-in, but by 12 weeks, the insulin resistant group receiving the lower-carb diet lost significantly more weight, 19.6 pounds versus 16.2 pounds in the low-fat diet group - approximately 21 percent more on average.

"These data have potential widespread applications for clinicians when counseling people with insulin resistance to help improve weight loss as part of a calorie-restricted diet," Plodkowski said. "They should at least initially lower their carbohydrate intake."

Explore further: Health care organizations see value of telemedicine

add to favorites email to friend print save as pdf

Related Stories

Calorie density key to losing weight

Jun 08, 2007

Eating smart, not eating less, may be the key to losing weight. A year-long clinical trial by Penn State researchers shows that diets focusing on foods that are low in calorie density can promote healthy weight loss while ...

Recommended for you

Health care organizations see value of telemedicine

16 hours ago

(HealthDay)—Health care organizations are developing and implementing telemedicine programs, although many have yet to receive reimbursement, according to a report published by Foley & Lardner.

Before you go... are you in denial about death?

23 hours ago

For most of us, death conjures up strong feelings. We project all kinds of fears onto it. We worry about it, dismiss it, laugh it off, push it aside or don't think about it at all. Until we have to. Of course, ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

CutTheCarb
not rated yet Jun 20, 2010
I'm happy posts like this appear more often. This word can't be spread enough. Public health can easily be very much improved by a low carb lifestyle. If only governments would listen: http://bit.ly/9Ld7jC VBR

Please sign in to add a comment. Registration is free, and takes less than a minute. Read more

Click here to reset your password.
Sign in to get notified via email when new comments are made.