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Francesca Cassanelli
Ann NY Acad Sci 1033:42-51
In a separate head-to-head comparison, GHK-Cu outperformed both retinol (vitamin A) and vitamin C in improving skin firmness and elasticity, and it did so without the irritation, photosensitivity, or adjustment period associated with retinoid use
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Users typically notice improvements within days to weeks, depending on the condition
Choline supplementation of the mothers of unborn rats, as well as rat pups during the first month of life, leads to improved performance in spatial memory tests months after choline supplementation has been discontinued (123)
