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Many acne medicines (benzoyl peroxide, salicylic acid, and tretinoin) make your skin more sensitive to the sun

News Release May 07, 2001 Over forty percent of Echinacea products fail ConsumerLab.com review

CD38: This enzyme degrades NAD+ and increases in activity with age, contributing to the age-related NAD+ decline

However, it has been observed that SOD levels and activity decrease when the skin is exposed to greater amounts of sunlight

They added GHK-Cu in concentrations of 10 M to 10 M and measured: Collagen synthesis (by radioactive proline incorporation) Non-collagen protein synthesis Cell proliferation What they found: Stimulation of collagen synthesis by 70 % at the optimal concentration of 10 M (1 nM) The effect was NOT dependent on increased proliferation, fibroblasts increased production per cell Background: GHK without copper had a dramatically weaker effect , Cu is critical Reversibility: After removing GHK-Cu, synthesis returned to baseline Why it matters: This is the fundamental mechanistic study that documented the effect of GHK-Cu on collagen