Q: I have heard the terms subcutaneous injection (SubQ), intramuscular injection (IM), sublingual (SL) and transdermal (TD) for years, but what exactly is the absorption rate between one and the other when it comes to these various forms of transport. I know that everyone says that an IM injection is the only fast way to get something into your system, but what would be the harm in using something transdermal (using DMSO), for instance, as opposed to another method? Is it that big of a deal? A: Good question. We’ll start with a method you didn’t mention…Intravenous injection (IV). While bodybuilders wouldn’t have occasion to use an IV injection unless they were using Nubain, IV injection is the fastest transport of all at about a 95-100% absorbtion rate. Subcutaneous injections are always given through the layers of skin and, ...

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