Copper peptides turning my skin slightly green-blue, anyone else?

Posted by casey613 in Safety & Side Effects - 1 points, 0 comments.

So I started using a GHK-Cu serum about three weeks in, once in the morning and once at night, and around day 10 I noticed a faint greyish tint along my jawline and the side of my nose, almost like a bruise that never goes away. Thought I was imagining it lah but my partner pointed it out and now I cannot unsee it.

I have been applying maybe 2 percent concentration, standard routine, nothing crazy. I read that overuse or layering it under occlusion can cause that green-blue copper buildup in the skin, but I am not even doing that. Just two thin layers on dry skin, no other actives in the AM.

Has anyone here dealt with this before? Did it fade after stopping, or did you have to wait it out? I am considering dropping to once daily and making sure I am not mixing it with anything acidic that could be driving the reaction. Also curious if topical vitamin C or a niacinamide serum changes anything when used in the same routine. Steady with the responses, just want to know what worked for others before I mess with the schedule.

Community discussion - research and educational context only. Not medical advice.