Potential drawbacks of fad diets include nutritional deficiencies, unsustainability, and adverse health effects. Many fad diets promote restrictive eating patterns that eliminate entire food groups, leading to a lack of essential nutrients. This restriction can result in short-term weight loss but often reverses when normal eating is resumed, leading to yo-yo dieting. Furthermore, these diets may promote unhealthy relationships with food by fostering guilt or binge behaviors. Lastly, they can create misinformation about healthy eating, making it difficult for individuals to adopt a balanced and sustainable approach to nutrition in the long run.