Vitamin K deficiency is uncommon in healthy adults. Vitamin K deficiency can be caused by taking anticoagulant drugs, liver damage or disease.

Vitamin K deficiency symptoms are:

• impaired blood clotting
• bruising
• bleeding (nosebleeds)
• blood in the urine
• blood in the stool
• heavy menstrual bleeding

Vitamin K deficiency can eventually lead to intracranial hemorrhage (life-threatening bleeding in the skull)

Recommended daily allowance isn't defined for Vitamin K.

The adequate Intake (AI) for Vitamin K:

Here is foods rich in Vitamin K:

• cabbage
• cauliflower
• cereals
• green leafy vegetables (spinach)
• soybeans
• oil
• organ meets
• cereals
• kiwi
• banana
• milk
• eggs

Vitamin K1 (phylloquinone) and Vitamin K2 (menaquinone) are not toxic in large doses.
Vitamin K3 (menadione) overdose causes oxidant damage to cell membranes and:

• liver toxicity
• jaundice
• hemolytic anemia

No UL (tolerable upper level) had been defined for Vitamin K.

Vitamin K is fat-soluble vitamin that plays role in blood clotting (coagulation).
There are two common forms of Vitamin K

• Vitamin K1 also known as phylloquinone (synthesized by plants)
• Vitamin K2 also known as menaquinone (synthesized by animals)
• Vitamin K3 also known as menadione

Vitamin K functions are:

• Coagulation (clotting)
• Bone mineralization
• Cell growth
• Plays key role in vascular biology