how does ghk-cu affect gene expression is getting a lot of attention right now, and for good reason. This is not just a “skin peptide.” It's a copper-binding tripeptide with documented effects on expression, collagen synthesis GHK-Cu for Hair Growth: Protocols
Description
Expression and activation of matrix metalloproteinases in wounds: Modulation by the tripeptide-copper complex glycyl-l-histidyl-l-lysine-Cu2+ J

What it doesn't do is interact with the follicle directly

After observing the performance of the first sheet for two days, the crew charged the second rink with R-434a in the afternoon and flooded the rink with water during the night

Pregnancy and breastfeeding warrant avoidance due to insufficient safety data in these populations

Far fewer remember what vitamin B12 replacement can do to potassium

The other thing to keep in mind is that there is generally less robust data about J&J because there were far less people who got the J&J vaccine compared to people that received either Pfizer or Moderna