Resveratrol 500mg Glutathione 200mg Quercetin 200mg Grape Seed Extract Antioxidant Supplement For Women and Men with N Acetyl Cysteine and Selenium, Quercetin is a plant compound naturally found in foods like apples, onions and berries. It's known for its powerful antioxidant properties and the role it can play in supporting overall immune system Quercetin inhibits hydrogen peroxide induced cleavage of heat shock protein 90 to prevent glutathione peroxidase 4 degradation via chaperone mediated autophagy ScienceDirect Exploitation of Quercetin's Antioxidative Properties in Potential Alternative Therapeutic Options for Neurodegenerative Diseases