Scalp applications often use different product formulations than facial products
doi:10.1016/j.pep.2011.05.012
[7] Research has indicated a potential area of interest for DSIP in the study of withdrawal symptoms from opiate and alcohol addictions, which has been supported by the results of studies in animals conducted by Tissot and the fact, that DSIP possesses an agonistic activity on opiate receptors
Impaired healing: senescent cells help wound repair, so clearing them at the wrong time may not be wanted
The strongest and oldest evidence for GHK-Cu comes from wound-healing and tissue-repair research it accelerated wound healing and raised antioxidant enzyme levels in animal studies alongside a large body of laboratory work on collagen, the extracellular matrix, and gene expression.213 There are also small, placebo-controlled human studies in which GHK-Cu creams improved skin laxity, reduced the depth of fine lines and wrinkles, and increased skin density.1 That's genuinely encouraging
Wang XY, Qu M, Duan R, et al