Low-carbohydrate diets: Are they safe and effective?

MayoClinic.com: "Fad diets have been around for decades. New ones surface regularly, and some older ones fall in and out of favor. One of the more popular diets today is a low-carbohydrate, high-protein diet. Researchers have reported some successful short-term results from restricting carbohydrate intake, findings that have sparked further debate in the medical community about the effectiveness and safety of such diet programs."