A study in the British Medical Journal followed 43,000 women. Among those on low carbohydrate, high protein diets, researchers saw a 28% increase in the number of heart-related cases. Their conclusion is that the potential harm from these diets outweighs the benefits of weight loss.
However, a new study in the Journal of the American Medical Association highlights the benefits of a low-carb diet. It suggests diets that reduce the surge in blood sugar after a meal--either low-glycemic index or very-low carbohydrate may be preferable to a low-fat diet for people trying to achieve lasting weight loss.
The study also finds that the low-glycemic index diet had similar benefits to the very low-carb diet without negative effects of stress and inflammation that can lead to heart disease and diabetes in people on the very low-carb diet.