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How GHK-Cu Compares to Retinoids, Vitamin C, and Other Anti-Aging Ingredients The 1998 head-to-head trial by Abdulghani measured procollagen synthesis side by side, and the copper-binding peptide outperformed both vitamin C and tretinoin
Most subcutaneous and intramuscular injections cause only mild pain
It might be an old injury that never properly healed or a new, persistent ache
Escalation phase breakdown The standard protocol starts low and increases every four weeks to minimize gastrointestinal side effects that rapid dose escalation can cause
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