Fad diets sound good but exaggerate false weight loss. They typically fall short of delivering on their promises. Fad diets can be dangerous to your health. Physical problems may arise from fad diets. Consult your physician before starting any weight-loss program. Yo-yo dieting can emerge from repeated failures. Weight cycling of repeated rounds of weight loss and regain, aids in the body becoming more efficient at making and storing fat. Making healthier food choices and increasing physical activity promote long-term weight loss and successful maintenance.