Just picked up my nutropin growth, but I don't understand how to measure the i.u's in the insulin syringe. My friend who gave it to me has been filling up to the 20 on the syringe in the morning and in the night and having great results. He says this equals four i.u.'s per day, and each bottle should last 14 days. However the box says that each 5mg solution will make 15 i.u's, so it doesn't add up. So how many i.u's on the insulin syringe equal one i.u. of growth?

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