What does glutathione do for MTHFR? Datis If you have a sulfur sensitivity, glutathione can be problematic. Glutathione is primarily made up of sulfur, which can cause issues for those with a sulfur sensitivity. While Glutathione is Differentiating Sulfur Compounds: Sulfa Drugs, Glucosamine Sulfate, Sulfur, and Sulfiting Agents Amazon.com: Allergy Research Group ARG Acetyl Glutathione 100 mg Stabilized Bioavailable Glutathione Antioxidant & Immune System Support Well Absorbed Formula 60 Servings 60 Tablets : Health & Household Sulfa Allergy: What It Is and How to Avoid It