ghk-cu copper peptide hair regrowth evidence studies for Growth: What the Actually Shows GHK-Cu Peptides Before and After:

In rats given BPC-157, serotonin levels in the brain increase in specific regions while simultaneously decreasing in other regions, such as the hippocampus.[ref] A 2020 study found that BPC-157 reduced leaky gut syndrome by stabilizing gut permeability after NSAID use.[ref] Reducing leaky gut theoretically can affect the gut-brain axis and reduce inflammation

This means your skin doesn't just look better on the surface

Cellular Turnover and Pigmentation One of the less-publicized but clinically notable effects of GHK-Cu is its influence on cellular turnover rate

Recent studies looking at the telomeric proteome during replication observed high levels of histone protein H1 at telomeres during replication (Lin et al 2021), and cells that had H1 depleted through knockout experiments are sensitive to DNA damage and double strand breaks (Murga et al 2007)