Glow From Within: The Benefits of Glutathione, easy ways to improve your health Subcutaneous vs intramuscular whats the difference? #vitamintherapy #theb12store #injection Intramuscular vs. Subcutaneous Injections: Whats the Difference?, Intramuscular (IM) shots go deep into the muscle for faster absorption, while subcutaneous (SubQ) injections are placed just under Glutathione IV Detox Your Shortcut to Feeling Fabulous I.M vs SubQ for Growth Hormone, the old adage of what's best? At therapeutic doses, I.M may produce a slightly higher and earlier CMax for GH level. But the overall exposure (AUC)