Understanding Glutathione Smell in Skin Products Does Glutathione Smell Bad? Understanding the Master Antioxidant Cymbiotika CYMBIOTIKA I love how lypospheric glutathione makes your breath smell like burnt cat hair for hours. #bonus 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