Vitamin K1 - Laboratory Testing

Vitamin K is a group of fat-soluble vitamins essential for the functioning of several proteins involved in blood clotting. Insufficient vitamin K can lead to excessive bleeding and easy bruising. Vitamin K is also involved in maintaining healthy bones by assisting in the transportation of calcium from the blood to the bone. Without sufficient amounts of vitamin K, calcium can build up on the arterial wall resulting in vascular and cardiovascular problems.

Vitamin K is also thought to play an important role in the prevention of bone loss. Low blood levels of vitamin K have been associated with low bone density, and maintaining adequate levels of vitamin K can improve bone health while reducing the risk of fractures.

There are two basic forms of vitamin K:

  • Vitamin K1 (phylloquinone) is the type that comes from the diet, especially green leafy vegetables.
  • Vitamin K2 (menaquinone) is produced by bacteria in the intestine and includes different forms such as MK-7 and MK-4.

This blood test measures only Vitamin K1. Fasting is not required. Take all medications as prescribed.


Fasting is not required for this test.

Take control of your own health with this innovative blood testing service.

  • Affordable prices
  • No insurance required or accepted
  • Nearby locations by Zip code

Testing is as easy as 1-2-3.

  1. Order here! (Not available in Maryland)
  2. Take the requisition† you’ll receive by email (or mail) to a local LabCorp Patient Service Center.
  3. Have your blood drawn at your convenience.

So is understanding your results!

  1. Your results will be sent directly to you … by mail, e-mail or fax. Or you can view them online. It’s your call.
  2. Results take 3 days to 3 weeks to receive, depending on the complexity of the blood tests ordered and your chosen method of delivery.
  3. Once you receive them, discuss them with your own doctor. You can also call 1-800-226-2370 and ask a knowledgeable Life Extension Health Advisors for help in understanding your blood test results.

*Blood testing services are available only in the continental United States and Anchorage, AK. Not available in Maryland.

†Your blood test requisition options are a LabCorp requisition form or a blood draw kit. Certain restrictions apply for residents of MA, NY, NJ, RI, and PA. Customers in MA, NY, NJ, and RI will receive a blood draw kit, and an additional local blood draw fee may be incurred. PA customers must go to LabCorp for their blood draw.

**DISCLAIMER:

The laboratory services are for informational purposes only. It is not the intention of National Diagnostics, Inc and Life Extension to provide specific medical advice but rather to provide users with information to better understand their health. Specific medical advice including diagnosis and treatment will not be provided. Always seek the advice of a trained health professional for medical advice, diagnosis or treatment.

Both the physician and the testing laboratory are independent contractors with whom National Diagnostics, Inc makes arrangements for your blood tests. Neither National Diagnostics, Inc or Life Extension will be liable for any acts or omissions of the physician, the testing laboratory, or their agents or employees.

Information on this page is not intended as a substitute for advice provided by a competent health care professional. You should not use this information in diagnosing or treating a health problem. No claim or opinion expressed on this web site is intended to be, nor should be construed to be, medical advice. If you are now taking any drugs, prescribed or not, or have a medical condition, please consult a competent physician who is aware of herb/drug interactions before taking any herbal supplements. The information presented herein has not been evaluated by the FDA or the Department of Health and is not intended to diagnose, prevent or treat any disease or illness.

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