Injectable GHK-Cu causes significant injection-site reactions, and its hair growth signal may be placebo.
A dermatologist in the group recommended topical GHK-Cu after microneedling as the cleaner option, with better evidence.
Key takeaways
- Prefer topical GHK-Cu after microneedling over injection.
- Be cautious about hair growth claims for injectable use.
From Buzz in the chat, the longevitydocs™ Sunday newsletter, May 31, 2026. Member discussion, not clinical guidance.
Originally published in The Longevity Medicine Intelligence newsletter.
WRITTEN BYlongevitydocs™ editorsCurated by the longevitydocs™ editorial team from the weekly newsletter
