Maintaining blood glucose levels in a safe range is crucial for the overall health of a person, as it directly impacts energy production and cellular function. Stable blood glucose levels contribute to cognitive function, sustained energy, and the prevention of cardiovascular and neurological complications. This paper focuses on regulating blood glucose levels and maintaining them in the safe range of 70 to 180 mg/dL using a closed-loop control strategy with a Mamdani Type-I fuzzy logic system. The effectiveness of the proposed controller was tested on three test scenarios. The results showed that it performed well in every case. The simulated results are presented and discussed. © 2024 IEEE.