designs for health vitamin d synergy - 2000 iu vit d3 and vitamin k, bone + immune support supplement for adults - non-gmo + no soy (120 capsules) designs for health vitamin d synergy provides 2000 iu of vitamin d3 along with vitamin k in the form of k1. this formula can be replaced with vitamin d supreme when more aggressive levels of vitamin d and k are desired. vitamins d and k are essential for optimal bone and arterial health and for maintaining the immune system in proper balance.* made with non-gmo ingredients.