The diet that promotes a restricted eating-plan or certain liquid foods lacking sufficient food value is termed as Fad Diet. The fad diets are very low in calories so they cause very fast weight loss. However, quick weight loss may not be healthy and - in most cases - is not fat loss. It is actually water-loss which is quickly regained when the dieter resumes normal eating. The fad diets can cause weight cycling, which means a continuing pattern of gaining and losing weight. The fad diets are considered unhealthy. The common examples of Fad diets include the Cabbage Soup Diet and the Grapefruit Diet etc.
baba RAMDEV have been prescribing "LAUKI KI RUS" which is also a fad diat.
be careful guys!!!