Vitamin K2 Advantage, For Bone & Heart Health, 60 Tablets, Source NaturalsSource Naturals Vitamin K2 Advantage Dietary Supplement. For Bone and Heart Health. Complete Vitamin K Complex. Vegan and non GMO. Vitamin K2 Advantage uniquely delivers three powerful forms of vitamin K important to bone and heart health K1, and two forms of K2, known as MK 4 and MK 7. A potent form of K2, MK 7 works in two ways it supports bone density and maintenance of normal vascular elasticity by helping direct proper amounts of calcium to the