Yo-yo dieting influences metabolic health by causing fluctuations in body weight that can lead to metabolic dysregulation. Repeated cycles of weight loss and regain may slow down the metabolism and alter how the body processes nutrients. This may increase the risk of insulin resistance, fat accumulation, and hormonal imbalances. Additionally, yo-yo dieting can negatively impact mental health, often leading to stress and unhealthy relationships with food. Adopting a sustainable and balanced approach to nutrition is crucial for long-term metabolic health and well-being.