When it says 20 units, that is 0.2mL
The paediatric dose for an average child, frequently quoted in the literature and based on in vitro experiments with canine blood, is 0.33 ml of a 3% solution per kg body weight (about 10 mg/kg), administered intravenously with the precautions noted above (Hall & Rumack, 1986)

Best injection sites Primary sites (easiest): Abdomen (2+ inches from belly button) Front/outer thighs Upper arms (back of arm, harder to self-inject) Love handles (sides of waist) For targeted effects: Face/neck aging: Inject near face (deltoid, upper arm) Hair loss: Scalp injections or systemic Wound healing: Near wound site General: Any standard site works Site rotation: Use 6-8 different sites Rotate each injection Keep 2+ weeks between same site Prevents tissue irritation and scar tissue Injection supplies What you need: Reconstituted GHK-Cu vial Insulin syringes (29-31G, 1/2" or 5/16") Alcohol wipes Sharps container Bandaids (optional) Syringe markings: Insulin syringes marked in units 100 units = 1ml 10 units = 0.1ml Easy to measure precise doses Step-by-step injection process Injection procedure: Prepare Wash hands Remove GHK-Cu from fridge Let warm 5-10 minutes (room temp more comfortable) Gather supplies Clean injection site Wipe with alcohol Let air dry completely Draw GHK-Cu Clean vial top with alcohol Insert needle into vial Draw desired dose (e.g., 0.2ml for 2mg) Check for air bubbles, tap to remove Pinch skin Create skin fold with thumb and finger Provides cushion for needle Insert needle 45-90 angle Quick, smooth insertion Insert fully Inject slowly Push plunger steadily 3-5 seconds Don't rush Remove and dispose Pull needle straight out Apply pressure if needed Dispose in sharps container Never recap Store GHK-Cu Return to refrigerator immediately Protect from light See our peptide injections guide , getting started with peptides , and common peptide mistakes beginners make

B12 shots fit naturally into a broader wellness program
Researchers studying metabolic dysfunction in adipose tissue have identified NNMT as one of the most consistently upregulated enzymes in obese white fat, making it a high-confidence therapeutic target for metabolic intervention
Track when effects begin after injection, when they peak, and when they start fading