Yes, you can mix collagen powder into your beverage and take your glutathione at the same time
The carboxylic groups of the pentadecapeptide BPC 157 may contribute to its role as an antioxidant
Shimoni A, Anderlini P, Andersson B, Andreeff M , Braunschweig I, Claxton D, Cohen A, Donato M, Estey E, Gajewski J, Khouri I, Korbling M, Kornblau S, Molldrem J, Ueno N, Champlin R, Giralt S
And one shouldn't expect anything else from them
The GLOW stack combining all three uses these typical ratios
Secchi N, Catzeddu P, Garca MR, Giunta D, Mannazzu I, Pretti L, Roggio T (2012) Bioconversion of ovine scotta into lactic acid with pure and mixed cultures of lactic acid bacteria