Restrictive diets can adversely affect metabolic health by slowing down the basal metabolic rate and leading to muscle loss, which can hinder long-term weight management. These diets often lack essential nutrients, contributing to deficiencies that may impair metabolic processes. When the body perceives limited food intake, it may enter starvation mode, conserving energy and making weight loss more challenging. Additionally, such dietary restrictions can lead to unhealthy relationships with food and promote binge eating, further disrupting metabolism. A balanced, nutrient-dense diet is preferable for sustainable metabolic health.