After searching the site through a few times, reading the HGH Guide, and making a topic about this I still got conflicting answers. On a U-100 Insulin needle, which is a 100 unit measurement(NOT 100 IU measurement), how many units would it be for 4 IU's? I have heard 20, 22, 4, 16, and 40. Any help from those who know about or have U-100 Insulin needles is greatly appreciated!


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