Solgar Quercetin Complex includes the important bioflavonoid Quercetin in a synergistic formula with Ester-C® Plus and Bromelain to provide unique antioxidant protection as well as natural seasonal support.Quercetin is found in onions and other foods. It possesses antioxidant properties which help to stabilize 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.Solgar Quercetin Complex also features bromelain, a natural enzyme derived from pineapple.SUITABLE FOR VEGANS * KOSHER. SUGAR, SALT & STARCH FREE.INGREDIENTS FOR Solgar Quercetin Complex:Each Two (2) vegetable capsules of Solgar Quercetin Complex provide:Vitamin C (as calcium ascorbate, threonate [Ester-C])500mg, Quercetin 500mg, Bromelain (2000GDU/g)50mg, Citrus Bioflavonoids (as prep.)5mg, Rose Hips Powder 20mg, Acerola Powdered Extract (4:1) 20mg, Rutin 10mg. Solgar Quercetin Complex Capsules are Encapsulated with these natural ingredients: magnesium stearate. DIRECTIONS FOR USE OF Solgar Quercetin Complex: As a food supplement for adults two (2) vegetable capsules daily, preferably at mealtime, or as directed by a healthcare practitioner. Solgar Quercetin Complex Vegetable capsule shell: hydroxypropylmethyl cellulose.