Solgar Quercetin Complex Vegetable Capsules With Vitamin C as Ester-C, Plus Bromelain and More... Ester-C provides a patented method of supplementing pH neutral (non-acidic) vitamin C to prevent stomach irritation. Ester-C is a registered trademark of Zila Nutraceuticals, Inc and is manufactured under US Patent #4,822,816 and 5,070,085 and corresponding foreign patents. This product is suitable for vegan and kosher diets and is also free from sugar, salt and starch. Ingredients:Each Two (2) vegetable capsules of Solgar Quercetin Complex provide: Vitamin C (as calcium ascorbate, threonate [Ester-C]) - 500mgQuercetin - 500mgBromelain (2000GDU/g) - 50mgCitrus Bioflavonoids (as prep.) - 5mgRose Hips Powder - 20mgAcerola Powdered Extract (4:1) - 20mgRutin - 10mgNatural Ingredients:Magnesium stearate. Vegetable Capsule Shell:Hydroxypropylmethyl cellulose. Directions:As a food supplement for adults two (2) vegetable capsules daily, preferably at mealtime, or as directed by a healthcare practitioner.