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This enzymatic barrier represents a key physiological limitation, not a formulation flaw

Who should avoid GHK-CU Wilson's disease or copper metabolism disorders Active malignancies (until more research exists) Pregnancy and breastfeeding Known copper sensitivity or allergy Those unable to maintain sterile injection technique When uncertain, consult a healthcare provider familiar with peptide research

In a healthy system, intracellular glutathione immediately neutralizes these free radicals, protecting the delicate mitochondrial membranes from lipid peroxidation and structural damage

Skin is a living tissue that reacts to environmental conditions

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