Natural Factors Vitamin K & D features vitamin K2 as menaquinone-7 (MK-7), an advanced, fat-soluble form of vitamin K that serves multiple functions in the body. The K family consists of a trio of vitamins: K1 (phylloquinone), naturally occurring in leafy green vegetables and plant oils; K2 (menaquinone), present in butter, cow liver, eggs, certain cheeses and natto, a fermented soybean food; and K3, the synthetic form of the vitamin. Only K2 in the MK-7 form has been shown to offer 24-hour benefits from a single daily dose. Other commercially-available subtypes of K2, such as MK-4, only last four to six hours in the body and are required in much larger dosages to be effective.
Vitamin D has long been considered a classic nutrient for bone metabolism. New evidence shows that vitamins K and D work synergistically to improve bone density. Natural Factors K & D includes vitamin D3 (cholecalciferol), a natural form of vitamin D that is safer and more biologically active than D2 (ergo- calciferol), a synthetic form of vitamin D. Many of the clinical trials examining the effects of K2 on bone density found much greater effect when vitamins K2 and D3 were given together as opposed to either nutrient alone.
Natural Factors Vitamin K & D 60sg
1 softgel daily or as directed by a health care practitioner