- Consuming immunosuppressive drugs or taking antioxidant supplements including Vitamin E, Vitamin C, N-acetyl- cysteine (NAC), Pentoxifylline, Lipoic acid,Fish-oil extracts (omega-3 fatty acids), Soy extracts(isoflavones), Green-tea preparations, Pomegranate extracts, Grape extracts within 2 months prior to enrollment in the study