Vitamin K1 Blood Test

What is the purpose of this test?

Order this Vitamin K Blood Test measures vitamin K levels in the blood to screen for a vitamin K deficiency and assess the risk of blood clotting, bone metabolism, and hemorrhagic disorders. Vitamin K plays an important role in the formation of coagulation factors, which are substances that help the blood form clots to prevent excessive bleeding. It is also believed to play a role in preventing bone loss.

Vitamin K is obtained from the foods we eat, such as:

• Kale
• Turnip greens
• Swiss chard
• Lettuce
• Brussels sprouts
• Broccoli
• Cauliflower
• Cabbage
• Fish
• Liver
• Meat
• Eggs
• Fortified cereals

In addition, some vitamin K is also made by the good bacteria in the lower intestinal tract. However, individuals with malnutrition, intestinal malabsorption problems from cancer or kidney disease, or undergoing long-term treatment with antibiotics are at high risk of developing a vitamin K deficiency.

What causes vitamin K deficiency?

Although a vitamin K deficiency is rare, several conditions may affect vitamin K levels. Vitamin K deficiency most commonly affects individuals with malnutrition or intestinal malabsorption issues. Vitamin K deficiency may be caused by conditions such as:

• Malnutrition
• Crohn's disease
• Celiac disease
• Inflammatory bowel disease (IBD) 
• Diabetes
• Chronic kidney disease
• Liver disease
• Cystic fibrosis
• Certain drugs (coumarin anticoagulants, cholestyramine, salicylates, rifampin, and barbiturates)

When should I order a Vitamin K Blood Test?

Individuals may order this test if they have experienced symptoms related to a vitamin K deficiency. Common symptoms of vitamin K deficiency include:

• Excessive bleeding and easy bruising
• Heavy menstrual bleeding
• Decreased ability to fight infection and heal wounds
• Weakened or brittle bones