Vitamin K

Vitamin K is a fat-soluble vitamin that plays an important role in blood clotting.

Dosing Recommendations

Since Vitamin K is synthesized by bacteria in the gastrointestinal tract, supplementation is not usually necessary.

RDI

80 mcg

Deficiency

Vitamin K deficiency is rare and is usually caused by some condition that leads to the inability to absorb the vitamin from the intestinal tract. Deficiency can also occur after prolonged treatment with oral antibiotics.

Overdose

TBD or none

Synergists

Vitamins K and D may work synergistically to help improve bone density.

Antagonists

TBD or none

Food Sources

Vitamin K is found in cabbage, cauliflower, spinach, and other green leafy vegetables, cereals, soybean, and other vegetables. Vitamin K is also made by the vitamin K-synthesizing microorganisms lining the gastrointestinal tract.

Medicinal Purpose

Vitamin K helps improve blood clotting.

Interactions with common drugs

TBD or none

Recent Studies

Weber, P

Vitamin K and bone health.

Nutrition. 2001 Oct;17(10):880-7

There is a consistent line of evidence in human epidemiologic and intervention studies that clearly demonstrates that vitamin K can improve bone health.