Is Insulin useful for weight loss?

Insulin is a hormone that promotes glucose uptake into cells and stimulates fat storage. In individuals without diabetes, administering insulin does not lead to weight loss; rather, it often causes weight gain by enhancing lipogenesis and lowering blood sugar, which can trigger hunger. In diabetes management, weight gain is a well-known side effect of insulin therapy. There is no scientific evidence supporting the use of insulin for weight loss in metabolically healthy people. Using insulin without medical necessity is dangerous: it can cause severe hypoglycemia, loss of consciousness, and even death. Anyone seeking to lose weight should rely on evidence-based approaches such as calorie control, physical activity, and medically supervised interventions if needed. Insulin is not a weight-loss tool.