Smelly glutathione farts could be explained by gamma glutamyltransferase (GGT)., As mentioned in this video, GGT provides specific bacteria cysteine to make smelly farts. Watch this video to learn One of our products smells like rotten eggs?! It's actually because of an ingredient called Glutathione, which naturally contains Sulfur. But don't let the smell fool you this ingredient will make Glutathione IV Therapy: What You Need to Know SHIMBI METHOD, Derma Serum Mist Glutathione 1% 50ml Watsons Malaysia