Vitamin K2 + D3 400 IU/100 mcg - 60 TabletsSource Naturals Vitamin K2 + D3 combines two fat soluble vitamins in one tablet. Each tablet provides 400 IU of vitamin D3 as cholecalciferol, 100 mcg of vitamin K2 as menaquinone 7, and 106 110 mg of calcium from dibasic calcium phosphate. The vitamin K2 in this formula is delivered as menaquinone 7, a form that remains active in the body up to 12 times longer than other forms of vitamin K. Vitamin K2 acts as a cofactor for proteins that bind calcium
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