Doctor's Best - Best Vitamin C 1000 mg. - 360 Vegetarian Capsules Doctor's Best Vitamin C featuring Quali-C provides ascorbic acid manufactured in Scotland and prized for its quality and reliability. Ascorbic acid is indispensable to the body for its role as an electron donor, supporting numerous enzymes in addition to enhancing the body's total antioxidant potential. It is also essential for the synthesis of collagen, carnitine, and certain brain chemical transmitters. Abundant clinical research confirms vitamin C's fundamental support for the brain, eyes, heart and circulation, immune system, and all the body's other organ systems. Science-based nutrition Dietary supplement Helps neutralize oxidative stress Supports optimal immune function Best Vitamin C featuring Quali-C provides a brand of ascorbic acid (also known as ascorbate) that is manufactured at the only plant outside of Asia that produces high-quality vitamin C. Located on the coast of Scotland, the site is committed to minimizing the environmental impact of its production process, and ensures that their vitamin C is made from glucose originating from European non-GMO cornfields. Vitamin C is essential to the biosynthesis of the metabolic facilitator L-carnitine, the neurotransmitter norepinephrine, and the main connective tissue in the body, collagen. While these functions are obviously critical for our health, this vitamin is most widely revered for its role as a reducing agent (an electron donor), serving as a co-factor for hydroxylases (enzymes) in addition to enhancing the body's total antioxidant potential. As a reducing agent, ascorbate also can aid in the absorption of dietary nonheme iron, helping those who need more iron from their daily intake. Enhances the body's antioxidant network Vitamin C is a key compound in the body's antioxidant network, a chain of synergistic, inextricability linked, well-studied antioxidants that includes glutathione (GSH) and vitamin E.