ghk-cu sublingual Oral Peptides GHK-Cu Dosage and Protocol: A

Foods like yogurt and kefir are good starting points

GHK-Cu Injections Subcutaneous injections are a common way to administer GHK-Cu to test subjects for the purpose of studying systemic healing, skin rejuvenation, and hair growth

Many commercial sites claim GHK-Cu "inhibits 5-alpha reductase" and "reduces DHT," but the primary literature does not support that framing as a mechanism of action for the peptide itself

Human evidence remains confined to topical cosmetic work, including a 12-week trial in 71 women using formulations in the 0.11% concentration range applied to skin [5]

Meaningful visible changes to firmness and fine lines: 4-8 weeks

Semax has broader evidence breadth