Injection sites vary by type (subcutaneous SQ or intramuscular IM), with common SQ areas including the abdomen (away from navel), thighs, and upper arms, while IM sites are typically the deltoid, 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) Glutathione IV Therapy: What You Need to Know COEM Glutathione Injections Etobicoke, ON Skin Studio