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Copper peptides are naturally produced by our bodies, but as we age, the amount that we have is significantly reduced
While retinoids increase photosensitivity and require careful sun avoidance, GHK-Cu protects keratinocytes from lethal UV-B radiation and blocks UV-induced erythema without making skin more sensitive to sun exposure
If you couldn't tolerate GHK-CU, retinoids might work well, though they have their own adjustment period
Jul 2013;12(4):523-543
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