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The 250500 mcg subcutaneous range used in current research contexts sits below the 1 mg clinical trial dose, partly because subcutaneous bioavailability differs from the oral administration used in some trial arms

AOD-9604 Regulatory Standing: Also not FDA-approved

Nitrous oxide exposure, whether recreational or medical, can inactivate B12 and precipitate acute deficiency in susceptible individuals

Between sessions: daily topical GHK-Cu 1% serum (5 days on, 2 off)

Almost all of GHK-Cus evidence is topical, in-vitro or animal

Thigh: The outer-anterior thigh is another popular injection site, especially for self-administration