dr. gifford-jones preferred nutrition medi-c plus vitamin c & l-lysine formula berry flavour 600g preferred nutrition humans do not make vitamin c like animals do; we need to supplement this essential vitamin to meet our daily needs. inadequate amounts of vitamin c means poor collagen. vitamin c and lysine work together to build collagen, which strengthens and holds together the coronary cells. coronary arteries, closest to the heart, receive the greatest pressure. without enough vitamin c the collagen weakens. this sets the stage for heart attack or stroke. healthy collagen also supports healthy teeth, gums, cartilage, bones, connective tissue and wound healing. the antioxidants in medi-c plus also support and help maintain good health.