The hormone responsible for regulating blood sugar levels is insulin. Produced by the pancreas, insulin facilitates the uptake of glucose by cells, allowing them to use it for energy. Upon consuming food, especially carbohydrates, blood sugar levels rise, prompting the pancreas to release insulin. Insulin plays a critical role in maintaining glycemic control and ensuring energy balance in the body. Impaired insulin function can lead to conditions such as diabetes, emphasizing the importance of hormonal regulation for metabolic health.