'Blue skin' from GHK-Cu — is this a real risk or Reddit lore
35 posts
Keep seeing comments like 'be careful or you'll turn blue from the copper.' Is that a real thing from topical GHK-Cu, or are people confusing it with the argyria-style stories from oral colloidal silver / high-dose IV copper?
I assume topical doses of GHK-Cu are orders of magnitude too low to cause systemic copper accumulation but I want to be sure before I commit to daily use.
4 Replies
58 posts
Myth. Topical GHK-Cu at cosmetic concentrations delivers micrograms of copper at most. You'd need sustained high-dose IV copper or serious oral over-supplementation to get systemic copper toxicity. Not a real risk here.
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You can temporarily stain skin blue-green if you apply a very concentrated GHK-Cu solution and it oxidizes on the skin. That washes off. Not the same thing as metal deposition.
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