Glutathione for the skin Paula's Choice One of our products smells like rotten eggs?! , Its actually because of an ingredient called Glutathione, which naturally contains Sulfur. , But dont let the smell fool you this ingredient will 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 Glutathione: Master Antioxidant, Reducing Oxidative Stress, and Detoxification