Topical vs Oral Glutathione: Which Is Better for Skin? Full article: Glutathione as an oral whitening agent: A randomized, double blind, placebo controlled study Before you spend money on glutathione, read this first. Topical, oral, injectable what actually works and what's just marketing? #funskincare #funingredientsinfographic101 Glutathione is a natural antioxidant your body makes, and it can influence melanin production which is why its sometimes marketed for skin brightening., Oral supplements are mostly broken down in