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Formulated with 2% GHK-CU, a powerful copper peptide complex, this serum targets visible signs of aging by improving firmness, elasticity and hydration

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They might recommend a different treatment or adjust your skincare routine

Empirically, if you notice a peptide precipitates in pure water once it sits in the fridge, check if it has a tendency to aggregate in such cases, a very low concentration of salt or a different buffer might help keep it soluble

If you are pregnant, breastfeeding, or are an elderly individual, you should consult your healthcare provider before using L Glutathione+vitamin C to ensure it is safe for your specific needs