glutathione injections vs oral glutathione IV vs. Oral: Which one is effective your skin better?, The rapid absorption of IV therapy may offer immediate, concentrated benefits, while supplementation provides a gradual, How to Take Glutathione Effectively:

This indicates that the filth that often stains the skin is removed

May et al., 1998a)

Our data suggest the possibility that GSSG is transported from cytosol to apoplast to serve as an oxidant for class III peroxidases to generate reactive oxygen species for plant defense against Hessian fly larvae

(Remember, a state of oxidative imbalance makes a person more susceptible to numerous diseases.) Therefore, having an ample supply of glutathione in the body is critical for maintaining health

It's an ambiguity acknowledged by the review's authors, who state that more research is needed to clarify optimal amounts and to identify "sub-groups of individuals most likely to respond to particular nutrients or foods." Speaking with a doctor is your best first-line action to determine whether you could benefit from swapping dietary glutathione for a supplement, or vice versa