Quercetin Ascorbate Powder 100 g (3.5 oz)Designs for Health Quercetin Ascorbate is a dietary supplement providing quercetin and vitamin C in powder form. This is a potent antioxidant and flavonoid blend. Quercetin is a flavonoid that effects mast cells and basophils. Vitamin C supports histamine level regulation and inflammatory response. Recommended Use: Take 1 gram (approximately one quarter teaspoon) per day with a meal or as directed by a healthcare professional. Designs for Health