Sulfa Allergy: What It Is and How to Avoid It 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 Sulfa, Sulfite & Sulfate: Allergy Risk or No Concern? This is what happens when you are allergic to Sulfa : r WTF 10. Drug allergy Journal of Allergy and Clinical Immunology Absence of Cross Reactivity between Sulfonamide Antibiotics and Sulfonamide Nonantibiotics New England Journal of Medicine