glutathione joe rogan Every Supplement in Rogan's Stack Joe Rogan Experience #502 -
Description
GHK-Cu is compatible with most ingredients, including niacinamide and hyaluronic acid, but should not be combined with alpha hydroxy acids (AHAs) or strong acids in the same formula, as these may reduce efficacy

[DOI] [PMC free article] [PubMed] 64.Jiang L, et al

Cagri is N-terminally acylated with a Glu linker and a C20 fatty diacid moiety
the hydrochloric acid in the stomach splits the B12 from the protein

I cover more on this phenomenon in my folate article