Is Insulin useful for blood sugar?

Insulin is a key hormone for blood sugar regulation. Produced by pancreatic beta cells, it lowers blood glucose by promoting glucose uptake into muscle, fat, and liver cells. Without sufficient insulin (type 1 diabetes) or when it becomes less effective (insulin resistance, type 2 diabetes), blood sugar rises dangerously. Therapeutic insulin is life-saving for type 1 diabetes and is also used in advanced type 2 diabetes. However, insulin is not a supplement or lifestyle product—it is a prescription drug with risks such as hypoglycemia. The evidence for its efficacy is strong (randomized controlled trials, clinical practice). Consumers should understand that insulin is only indicated for diagnosed diabetes. In healthy individuals, endogenous insulin is sufficient; additional insulin would be dangerous. The question may reflect confusion with supplements—clear education is needed.