retinol or glutathione which is better The Science Behind Skincare: Collagen, Hyaluronic Acid, & Explained Retinol Cream with Glutathione &
Description
L-glutathione is the more established choice with extensive research, but its low bioavailability can be a drawback

Biomed Res Int , 2014, 2014: 151479

doi: 10.1002/glia.23547 140

doi: 10.1371/journal.pone.0163694 53 KaushikDKBhattacharyaAMirzaeiRRawjiKSAhnYRhoJMet al
The mTeSR-1 TM medium was changed daily and colonies were passaged every 57 days with Dulbeccos phosphate-buffered saline (DPBS) + EDTA (Life Technologies, USA)