Science-Based Nutrition Helps Support a Healthy Immune System Dietary Supplement Nutrition Non-gmo / Gluten Free / Soy Free Doctor's Best Vitamin C contains Q -C, which is manufactured in Scotland and prized for its quality and reliability. Vitamin C is indispensable to the body for its role in the synthesis of collagen, carnitine, and certain brain chemical transmitters. Abundant clinical research confirms Vitamin C's fundamental support for the immune system, brain, eyes, heart and circulation, and all organ systems. Vitamin C is also an electron donor, supporting numerous enzymes and enhancing the body's total antioxidant potential. Helps support a healthy immune system Helps support the body's antioxidant potential Essential cofactor for important enzyme systems Essential for joints and other connective tissues