How to Give Yourself a Subcutaneous Injection Using a Prefilled Syringe Memorial Sloan Kettering Cancer Center iSatori L CARNITINE Fat Loss Why Are People Injecting Themselves with Peptides? The New Yorker Treatments for injection site redness and swelling? L carnitine elite L Carnitine is an amino acid naturally occurring in our bodies. It shuttles fat into the mitochondria so it can be converted into ATP and used for energy. Acetyl l