Hong, Y., Downey, T., Eu, K
Cellular Turnover and Pigmentation One of the less-publicized but clinically notable effects of GHK-Cu is its influence on cellular turnover rate
however, they do not contain adequate amounts to be used as the sole dietary source
[16] National Library of Medicine
Although this might be seen as a positive for increasing cysteine and glutathione, in fact it is thought that the excess of cystathionine is overall negative and could flood and impair the other pathways below, or specifically increase ammonia
Safe vs Unsafe Combinations Glutathione pairs safely with Vitamin C, hydration minerals, and mild antioxidants that support absorption and skin health