For a visible skin effect, glutathione works on a course rather than a one-off
Also consider that theres a genetic component to natural glutathione recycling, making some of us with this genetic trait a lot more sensitive to the detrimental impacts of oxidative stress and therefore in need of much more glutathione support
Carrots, sweet potatoes, and spinach are high in beta-carotene, a precursor to vitamin A, which helps lighten pigmentation and improve overall skin tone
Fujiwara N, Nakagawa H, Enooku K, Kudo Y, Hayata Y, Nakatsuka T, et al
Some individuals do fine at standard doses immediately