glutathione increase Vitamin C and glutathione supplementation:
Description
Theres no established upper limit

Okombo J, Liebman M
[DOI] [PubMed] [Google Scholar] 178.Tohyama Y., Yamane F., Merid M.F., Diksic M

Shah D, Son KN, Kalmodia S et al (2020) Wound healing properties of histatin-5 and identification of a functional domain required for histatin-5-induced cell migration
:max_bytes(150000):strip_icc()/benefits-of-glutathione-89457_final-01-502464fe91b2444285b0cccf8cb0a33c.png)