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Vitamins

Vitamin K1 Blood Test

Vitamin K1 supports blood clotting and bone health, both important during menstruation, pregnancy, and menopause. Monitoring can help you understand your coagulation and bone status.

Doctor's Assessment Included

Reference Ranges

Female
nmol/l
Low 0.8 Normal 5.3 High

Source: Clinical Diagnostics Nederland Reference population: Nederlandse volwassenen (Clinical Diagnostics Nederland, serum)

Reference ranges may vary between laboratories. When you order a test, a BIG-registered doctor assesses your personal results in context. For treatment decisions, discuss your results with your GP.

Check your own value

Vitamin K1: what this test measures

This test measures the concentration of phylloquinone (vitamin K1) in your blood. It helps assess your vitamin K status and coagulation capacity.

Vitamin K1: why this value matters

Vitamin K1 is critical for proper blood clotting and may play a role in bone health. Low levels can be associated with excessive bleeding and may affect bone mineral density. Consult your healthcare provider for personalised interpretation.

Vitamin K1: when is testing worthwhile?

Testing may be recommended if you bruise easily, experience unexplained bleeding, take blood-thinning medication, or have conditions affecting fat absorption.

Vitamin K1: symptoms of a high or low value

Low Levels

Symptoms of low vitamin K1 may include easy bruising, prolonged bleeding from cuts, heavy menstrual periods, and blood in urine or stool. Severe deficiency can impair coagulation.

High Levels

Vitamin K1 toxicity from food sources is extremely rare. However, high intake may interact with blood-thinning medications. Discuss any supplementation with your healthcare provider.

Vitamin K1: lifestyle and this value

Eat plenty of green leafy vegetables such as kale, spinach, and broccoli. Consistent vitamin K intake is particularly important if you are on blood-thinning medication — discuss dietary changes with your healthcare provider.

Vitamin K1: frequently asked questions

What is the difference between vitamin K1 and K2?

Vitamin K1 is found mainly in leafy greens and is primarily involved in blood clotting. Vitamin K2 is found in fermented foods and animal products and may play a greater role in bone and cardiovascular health.

Can vitamin K affect my blood-thinning medication?

Yes, vitamin K can interact with certain blood-thinning medications. Maintain a consistent intake and consult your healthcare provider about any dietary changes.

How much vitamin K1 do I need daily?

Daily needs vary by age and sex. Your healthcare provider can advise you on the appropriate intake based on your individual health profile.

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These panels measure values from the same category as this marker.

Fertility & Pregnancy

IVF Blood Test Complete (Women)

Everything in the IVF panel plus full thyroid, preconception nutrients, progesterone and CMV immunity.

TSH (Thyroid Stimulating Hormone) Prolactin AMH (Anti-Müllerian Hormone) Estradiol (E2) FSH (Follicle Stimulating Hormone) LH (Luteinizing Hormone) Free T4 (Thyroxine) Folate (Folic Acid) Vitamin B12 Ferritin Progesterone Vitamin D (25-OH) Chlamydia IgG HIV 1/2 Antibody + p24 Antigen Syphilis Screening Blood Type + Rh TPO Antibodies CMV IgG Hepatitis B Core Antibody Hepatitis B Surface Antigen Hepatitis C Antibody Rubella IgG Toxoplasmosis IgG Varicella Zoster D-Dimer Basic Blood Count
€495,-

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Vitamin K1

€81,-