Description Medi-C Plus with Magnesium Ascorbate provides high doses of vitamin C and L-lysine, along with magnesium, to support cardiovascular health and immune function. These nutrients can help reduce the recurrence of cold sores, provide antioxidant support, and maintain bones, teeth, and gums. Vitamin C and lysine work together to build collagen, strengthening and holding the coronary artery cells together. NPN:80069904