Extreme diets can pose several risks, including nutrient deficiencies, metabolic slowdown, and loss of muscle mass. Such diets often restrict essential food groups, leading to an unbalanced nutritional intake. Additionally, they may promote unhealthy relationships with food, increasing the potential for disordered eating behaviors. Long-term adherence to extreme diets is typically unsustainable, often resulting in the rapid regain of lost weight and associated health issues.