Amazon.com: KisoCare Glutathione Serum 20,000 ppm Clear + Radiant Complexion Niacinamide, Panthenol, Vitamin C Note: Natural Sulfur Scent : Beauty & Personal Care 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 Why does Faded Serum smell? Glutathione! an ingredient thats super effective at reducing the appearance of discoloration in weeks Glutathione has a cysteine chain that causes it to have a sulfur LUXE ORGANIX Dermapro Sulfur Soap 2.5% Acne Rescue 80g eBay Masking the Off Taste and Odor of Glutathione While Increasing Bioavailability