Bone and Cardiovascular Health Vitamin SupplementFeatures Vitamin K2 from 100% Natural Japanese Natto, a Fermented Soybean ProductK2 Helps to Regulate get Calcium for Healthy Bones and a Healthy HeartHigh Potency Formula Get double the power with this double-strength version of Swanson Natto K7, delivering 100 mcg of vitamin K2. Swanson Natto K7 (formerly MenaQ7™) is the most biologically active form of vitamin K2. While vitamin K is mostly known for its involvement in blood clotting, K2 also helps to activate the proteins that regulate where calcium ends up in the body. Derived from 100% natural Japanese natto (a fermented soybean product), menaquinone-7 is scientifically proven to help promote bone and cardiovascular health by keeping calcium out of the arteries and getting it to where it really belongs—into the bones that need it. Vitamin K2 itself consists of 13 numbered natural substances called menaquinones of which primarily menaquinone-7 has been scientifically proven to benefit cardiovascular and bone health. Extensive research completed in the Netherlands indicates the natto-derived form of menaquinone-7 in Swanson Natto K7 helps get calcium out of the arteries and into the bones—where it belongs. Swanson Natto K7 truly "puts calcium in its proper place."