Solgar Quercetin Complex includes the important bioflavonoid Quercetin in a synergistic formula with Ester-C® Plus and Bromelain to provide unique antioxidants and immune health support. Quercetin is naturally found in onions and other foods. It possesses antioxidant properties which help to stabilise cell membranes. Ester-C® Plus provides a patented, pH neutral (non-acidic), form of vitamin C that is gentle on the stomach. Ester-C® Plus offers the additional benefits of incorporating acerola berry, citrus bioflavonoids, rutin, and rose hips. This formula also features bromelain, a natural enzyme derived from pineapple. __Suitable for:__ Kosher