Nature's lab® super vitamin c with quercetin & citrus bioflavanoids - 120 capsules nature lab super vitamin c is a premium formula featuring quercetin, bioflavonoids and vitamin c from calcium ascorbate, a source of vitamin c that is non-acidic and gentle on the stomach. Vitamin c is an essential vitamin that s the production of healthy blood cells to immune health. Vitamin c also s antioxidant health to protect the body from oxidative stress. Quercetin is derived from plant substances known as flavonoids. Citrus bioflavonoids are a group of compounds that occur naturally in citrus fruits. Both of these natural antioxidants may prevent histamine release to inflammatory health. S immune system health & cardiovascular health gentle, non-acidic vitamin c 1400mg per serving. Nature's lab super vitamin c with quercetin & citrus bioflavanoids healthy - 120 capsules (60 servings)