NOW Foods C-1000 – 30 vcaps. Antioxidant & Collagen Support* With 100 mg of Bioflavonoids Vitamin C is a water soluble nutrient well known for its vital role in the immune system.* Vitamin C is also necessary for the production of collagen (a structural protein in connective tissue) and is therefore important for skin, bone, and joint health.* Vitamin C is needed for amino acid metabolism, neurotransmitter synthesis, and the utilization of many nutrients, such as folic acid and iron.* It is also a highly effective antioxidant that can help maintain healthy tissues by neutralizing free radicals generated during normal metabolism and exposure to environmental stressors.* This product includes bioflavonoids, which work synergistically to support vitamin C utilization.*.