Get tested with Superpower

If you’ve been postponing blood testing for years or feel frustrated by doctor appointments and limited lab panels, you are not alone. Standard healthcare is often reactive, focusing on testing only after symptoms appear or leaving patients in the dark.

Superpower flips that approach. We give you full insight into your body with over 100 biomarkers, personalized action plans, long-term tracking, and answers to your questions, so you can stay ahead of any health issues.

With physician-reviewed results, CLIA-certified labs, and the option for at-home blood draws, Superpower is designed for people who want clarity, convenience, and real accountability - all in one place.

Key benefits of Vitamin K testing

• Reveals whether your body has enough vitamin K for healthy blood clotting.
• Flags deficiency that may explain unusual bruising or prolonged bleeding episodes.
• Guides supplementation decisions if you take blood thinners like warfarin.
• Spots malabsorption issues linked to gut, liver, or gallbladder conditions.
• Protects bone health by confirming adequate vitamin K for calcium regulation.
• Tracks vitamin K status during pregnancy to support fetal development.
• Clarifies whether dietary intake or absorption problems are causing low levels.
• Best interpreted with clotting tests (PT/INR) and your bleeding or bruising history.

What is Vitamin K?

Vitamin K is a fat-soluble vitamin that exists in two main natural forms: K1 (phylloquinone), found in green leafy vegetables, and K2 (menaquinone), produced by gut bacteria and present in fermented foods and animal products. Unlike most vitamins that come solely from diet, your body has a partial internal source for K2.

The master switch for calcium placement

Vitamin K acts as an essential cofactor that activates specific proteins responsible for directing calcium to where it belongs - your bones and teeth - and away from where it doesn't, like your arteries and soft tissues. Without adequate vitamin K, these proteins remain inactive and cannot perform their protective roles.

Beyond clotting: builder and protector

While vitamin K is best known for enabling blood clotting factors in the liver, its broader role involves bone mineralization and vascular health. Measuring vitamin K status helps assess whether your body has enough of this nutrient to support proper calcium metabolism, maintain skeletal strength, and protect cardiovascular tissues from harmful calcification.

Why is Vitamin K important?

Vitamin K governs blood clotting and bone mineralization, acting as a cofactor for enzymes that activate clotting factors in the liver and proteins that bind calcium in bone and vascular tissue. Without adequate vitamin K, your body cannot stop bleeding efficiently or direct calcium to bones instead of soft tissues. Most labs measure vitamin K directly or assess function through prothrombin time (PT/INR), with optimal levels supporting both hemostasis and skeletal integrity.

Your body's clotting system depends on it

When vitamin K is insufficient, clotting factors II, VII, IX, and X remain inactive, leading to prolonged bleeding from minor cuts, easy bruising, heavy menstrual periods in women, and in severe cases, internal hemorrhage. Newborns are particularly vulnerable because they have low stores at birth, which is why vitamin K prophylaxis is standard. Bone health also suffers over time, as undercarboxylated osteocalcin cannot properly mineralize bone matrix, raising fracture risk in older adults.

Excess rarely occurs from food alone

Elevated vitamin K from diet is uncommon and generally harmless, though high-dose supplementation can interfere with warfarin and other anticoagulants, reducing their effectiveness and increasing clot risk.

The long view on vascular and skeletal health

Beyond clotting, vitamin K influences vascular calcification and bone density across the lifespan. Chronic insufficiency may contribute to osteoporosis and arterial stiffness, linking this nutrient to cardiovascular and musculoskeletal outcomes decades later.

What do my Vitamin K results mean?

Low vitamin K levels

Low values usually reflect inadequate dietary intake, poor fat absorption, or disruption of gut bacteria that produce vitamin K2. This can impair blood clotting, leading to easy bruising or prolonged bleeding, and may weaken bone mineralization over time. Low vitamin K also reduces activation of proteins that prevent calcium from depositing in soft tissues like arteries. Newborns are particularly vulnerable due to limited placental transfer and low breast milk content. Adults with chronic digestive conditions affecting fat absorption or those on long-term antibiotics are at higher risk.

Optimal vitamin K levels

Being in range suggests adequate stores to support normal blood coagulation and proper function of vitamin K-dependent proteins in bone and vascular tissue. Optimal levels typically sit in the mid to upper portion of the reference range, reflecting sufficient intake from green leafy vegetables, fermented foods, and bacterial synthesis in the colon.

High vitamin K levels

High values usually reflect recent high dietary intake or supplementation. Naturally occurring vitamin K from food rarely causes toxicity, though very high levels from supplements may interfere with anticoagulant medications like warfarin by counteracting their effect.

Factors that influence vitamin K results

Interpretation depends on dietary patterns, gut health, liver function, and medication use. Anticoagulants, antibiotics, and bile acid sequestrants can lower levels. Assay methods vary, and results may reflect recent intake rather than long-term status.