Dr. Saudek answers the question: 'What Is Insulin & Why Is It Needed?' — -- Question: What is insulin and why do some diabetics need to take it? Answer: Insulin is a hormone. It's made by certain ...
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What Is Regular Insulin?

Regular (R) insulin is a short-acting, injectable insulin used for the management of diabetes. It is typically taken before meals to prevent glucose from rising after a person eats. Regular insulin is ...