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 Does Glutathione Smell Bad? Understanding the Master Antioxidant Cymbiotika CYMBIOTIKA Glutathione Drip In Dubai Glutathione Whitening Injection Faded gets its smell from glutathione, an ingredient thats super effective at reducing the appearance of discoloration in week Glutathione has a cysteine chain that causes it to have a sulfur like