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.* At Doctor?s Best we lead with science. Our products are backed by research and crafted using pure ingredients carefully sourced from around the globe. Since 1990 we have dedicated ourselves to providing highly effective nutritional supplements that enable you to live a healthier lifestyle. We want nothing more than to see you and your family thrive!