Low-carbohydrate diets: have they been researched adequately?
There have now been more than 70 clinical trials on nearly 7,000 people, including a wide variety of sick and well populations, mainly in the U.S. These studies are compiled in a public database.
- Thirty-two of these studies have lasted at least six months
- Six trials went on for two years, enough time to demonstrate the lack of any negative side effects.
- In virtually every case, the lower-carb, higher-fat diets did as well or better than competing regimens.
- The cumulative evidence shows that low-carb diets are safe and effective for combating obesity, highly promising for the treatment of Type 2 diabetes, and they improve most cardiovascular risk factors.
Did the Dietary Guidelines Advisory Committee review this literature?
An article in BMJ documents that the low-carbohydrate literature that was omitted from the Dietary Guidelines Advisory Committee report.
Excerpt: The omitted papers on low-carbohydrate diets include “nine pilot studies, 11 case studies, 19 observational studies, and at least 74 randomised controlled trials, 32 of which lasted six months or longer.” See Table C on BMJ.com for the complete list of studies. A more legible version of this table is available here (Appendix #5).