Health risks associated with crash diets include nutrient deficiencies, muscle loss, and metabolic slowdown. These extreme diets often involve severe calorie restriction, which can deprive the body of essential vitamins and minerals, leading to fatigue and weakened immune function. Additionally, rapid weight loss can cause muscle tissue breakdown, reducing overall strength and fitness. Crash diets may lead to a cycle of binge eating once the diet ends, ultimately resulting in weight regain. Sustainable weight management should focus on balanced nutrition and realistic lifestyle changes to promote long-term health.