Oral vs. Topical Glutathione by Gluvit S: What Works Better for Skin B Clinical Glutathione 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 How to Take Glutathione and Vitamin C Together?