Why does glutathione smell like sulfur? Dr. Nayan Patel shares that glutathione's sulfur smell comes from its powerful detox properties. Sulfur helps your body flush out toxins, which is why a) Scoring analysis for odor test of reduced glutathione (GSH) and Download Scientific Diagram If a serum smells bad it usually means it works., This glutathione serum smells like rotten eggs and thats your first clue its highly concentrated. Glutathione is known for targeting Rotten egg smell but thats how you know its REAL glutathione This ampoule is not here to smell pretty its here to WORK. helps reduce dark spots & pigmentation boosts skin vitality & glow Why is Glutathione the Key to Gut Health?