Time for a little GHK CU update for the people who are interested. It's day 9. I took a little break on day 5 just so my body didn't get too 'used' to Cu GHK vs Tretinoin: The Anti Aging Showdown Can You Use GHK Cu Peptides with Vitamin C Serum? Expert Guide Frontiers Exploring the beneficial effects of GHK Cu on an experimental model of colitis and the underlying mechanisms
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