nac creates l glutathione in the body What Is N-Acetyl Cysteine, and Why Does It Matter? — Seeking Health NAC Supplement (N-Acetyl Cysteine) -
Description
GSH peroxidase (GPx) in concert with catalase and superoxide dismutase (SOD) function to protect the cell from damage due to ROS

32 (Suppl 1), 145153 (2016)

Vernier et al., 2020

It doesn't mean glutathione won't work it just means expectations should be calibrated to your specific skin tone and baseline

A.NietoF
