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Store the unmixed lyophilised solid in a desiccated state at -20C out of direct light
Insulin is a peptide
If your skin is sensitive to many products, start with lower-concentration GHK-Cu (around 0.1%) and build up if tolerated
Timing and Frequency Most protocols call for once-daily injection, five days on, two days off
If you're deciding between GHK-Cu topical vs injection methods to support your cosmetic goals, topical serums may provide a more effective option to treat specific areas on the skin and scalp
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