How Many Types of Insulins for Treating Type 1 Diabetes?

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For most people with diabetes 1, knowing these 4 types of insulins is a must. Rapid-acting starts working about 15 minutes after you take it, peaks in about an hour, and lasts for 2 to 4 hours. Short-acting (sometimes called regular) starts working in 30 minutes, peaks 2 to 3 hours later, and lasts between 3 to 6 hours. Intermediate-acting starts working in 2 to 4 hours, peaks 4 to 12 hours later, and lasts for 12 to 18 hours. Long-acting starts working several hours after an injection and lowers glucose evenly over a 24-hour period.   Related FAQs: