is glutathione mostly intracellular Liposomal outperforms plain glutathione in uptake, cell regeneration and systemic availability: evidence from cellular and human models | British Journal of Nutrition The Biological Functions of Glutathione

Epub 2011 Apr 14

PMID 33328986

J Med Food (2019) 22:15261

In the general population, vitamin B supplementation may even be associated with a decrease in blood levels of homocysteine, a compound linked to heart attack and stroke risk, according to ODS

GHK has been shown to enhance extracellular matrix (ECM) activity in both dermal and pulmonary fibroblasts

A lot of issues are unrelated to the safety of the peptides themselves [and related to] how they are used. This includes stacking multiple peptides, incorrect dosing, and the lack of appropriate monitoring, like bloodwork or imaging done under a doctors supervision