glutathione 101 part 1 cysteine misbehaves but glutathione saves in Our Diet and Its Role in the Body: From Disease Prevention to Anti-Aging Frontiers | Cysteine Depletion, a

Artificial Elevation of Glutathione Levels by Infiltration of GSH and OTC Enhances Resistance to TMV in Wild Type and SA-Deficient NahG Tobaccos To directly assess the role of GSH in SA-mediated defense responses of tobacco to TMV infection, we first infiltrated 2 mM aqueous solutions of GSH or OTC into leaf halves of Xanthi and NahG tobaccos (control treatments: tap water)

Kawano Y, Kushima S, Hata H, Matsuoka M

Common doses are 200 to 500 micrograms once or twice a day, for 2 to 6 weeks

Rare but serious: seizures (mainly in people with seizure disorders), severe allergic reaction with swelling or trouble breathing

Here is a plain-English guide to the markers most relevant to this topic

If the patient is known to have low potassium or heart rhythm issues, monitor electrolytes