Weight loss in the context of medicine, health or physical fitness is the reduction of bodyweight in the form of water, body fat, muscle or bone mineral. It can be occurring unintentionally due to underlying disease or from conscious efforts to improve the overweight or obese state to improve fitness and health or to change appearance.Many people practices fad diet and unhealthy weight loss regime for rapid weight loss.

Fad Diet are diet or eating pattern that promote short-term weight loss usually with no concern for long term weight maintenance that gains its popularity 10 years back with more than 50 types of fad diet exist today. Fad dieting has insufficient scientific evidence to prove the efficacy of such fad diet and long term practicing of fad diet will bring harm more than benefit to our body.