Major governmental and medical organizations

Although opinions regarding low-carbohydrate diets vary greatly throughout the medical and nutritional science communities, major government bodies as well as major medical and nutritional associations have generally opposed this nutritional regimen. In recent years, however, some of these same organizations have gradually begun to relax their opposition to the point that some have even voiced cautious support for low-carbohydrate diets. The following are official statements from some of these organizations.

American Academy of Family Physicians

The AAFP released a discussion paper on the Atkins Diet specifically in 2006. Although the paper expresses reservations about the Atkins plan they acknowledge it as a legitimate weight loss approach.

American Diabetes Association
The ADA revised their Nutrition Recommendations and Interventions for Diabetes in 2008 to acknowledge low-carbohydrate diets as a legitimate weight-loss plan. The recommendations fall short of endorsing low-carbohydrate diets as a long-term health plan nor do they given any preference to these diets. Nevertheless, this is perhaps the first statement of support--albeit for the short-term--by one of the foremost medical organizations. In its 2009 publication of Clinical Practice Recommendations, The ADA again reaffirmed its acceptance of carbohydrate-controlled diets as an effective treatment for short-term (up to one year) weight loss among obese people suffering from type two diabetes.

American Dietetic Association
As of 2003 in commenting on a study in the Journal of the American Medical Association, a spokesperson for the American Dietetic Association reiterated the association's belief that "there is no magic bullet to safe and healthful weight loss."  The Association specifically endorses the high-carbohydrate diet recommended by the National Academy of Sciences.

American Heart Association

The official statement from the AHA regarding these diets states categorically that the association "doesn't recommend high-protein diets."  A science advisory from the association further states the associations belief that these diets are "associated with increased risk for coronary heart disease."  The AHA has been one of the most adamant opponents of low-carbohydrate diets. Notably, though, Dr. Robert Eckel, past president of the association, was quoted as saying that "a low-carb approach is consistent with heart association guidelines so long as there are limitations on the kinds of saturated fats often consumed by people on the Atkins diet."

U.S. Department of Health and Human Services
The HHS issues consumer guidelines for maintaining heart health which state regarding low-carbohydrate diets that "they're not the route to healthy, long-term weight management." Nevertheless HHS has issued some statements indicating wavering on this position.