How Often Can You Get Glutathione IV Treatment? Harleys Clinic Why Is Glutathione Added as a Push? Glutathione IV Power Intramuscular vs Subcutaneous injections what's the difference? At KDR, we often use peptides and wellness injections like NAD, glutathione, and HCG, but they are not all administered the same way. Intramuscular injections ( FDA highlights concerns with using dietary ingredient glutathione to compound sterile injectables FDA