Positive Benefits of Glutathione Healthy Directions 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 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 Grace and Glow Bright & Smooth Deodorant Serum with Niacinamide and AH D Nelson Enterprises