Thorne's Vitamin K contains three clinically studied forms of vitamin K – vitamin K1, and two forms of vitamin K2 (MK-4 and MK-7). It contains significantly more MK-4 than most other multiple-K products on the market.

Vitamin K is essential for blood clotting, heart health, and bone health. It also may prevent heart disease because it prevents calcium from being deposited in the arteries.

Vitamin K2 180 mcg is a high-concentration formula designed to support bone, cardiovascular and immune health. The formula includes MenaQ7® PRO, the most widely studied form of vitamin K2 as MK-7.

Klaire's vitamin K2 is a natural source of MK-7, which has the longest half-life compared to other forms of vitamin K.

Vitamin K2 as MK-4 promotes healthy bones and supports cardiovascular system health. Carlson Vitamin K2 provides 5 mg of MK-4 in a single capsule.

One-a-day capsule combines Vitamin K2 (as MK-7) and resveratrol to support bone health and structure, cardiovascular function and free radical protection.