Short-acting insulin is a type of insulin that helps control blood sugar levels in people with diabetes. It starts to work within 30 minutes after injection and peaks in about 2 to 3 hours, making it effective for managing blood sugar spikes after meals. This insulin is typically injected just before or shortly after eating. It is often used in combination with longer-acting insulins to provide better overall blood sugar control throughout the day. Proper timing and dosage are essential for achieving optimal results and minimizing the risk of low blood sugar.