Description
Vitamin K2 2600 mcg
“Vitamin K2 2600 mcg” is a high-strength vitamin K product, but the trade name alone does not verify a specific registered medicine. Vitamin K is a fat-soluble vitamin involved in normal blood coagulation and in the activation of certain proteins related to bone metabolism.
Active Ingredient and Medicine Class
The verified active ingredient class is vitamin K. In medicines, the best-documented oral prescription form is phytonadione, also known as vitamin K1, which is a vitamin K replacement. Some products marketed as “vitamin K2” may contain a different menaquinone form, but that cannot be confirmed from the supplied product name alone.
Established Medical Uses
Prescription phytonadione is used to treat coagulation disorders caused by vitamin K deficiency or interference with vitamin K activity, including some cases related to anticoagulant therapy, antibiotic use, or impaired vitamin K absorption. Vitamin K is also studied for bone health, but clinical evidence for routine supplementation as a bone treatment remains mixed and does not establish it as a substitute for standard osteoporosis care.
How It Works
Vitamin K is needed for the body to make active forms of several clotting factors in the liver. It helps enzymes add a chemical group called gamma-carboxylation to specific proteins, allowing normal blood clotting to occur. Vitamin K-dependent proteins are also involved in bone physiology.
Important Safety Information
Important contraindications and precautions depend on the exact vitamin K form and product. For phytonadione, hypersensitivity to the medicine or its components is a contraindication. Oral absorption may be reduced when bile delivery to the intestine is impaired. Vitamin K can interfere with anticoagulant therapy, especially coumarin-type medicines such as warfarin, and may temporarily reduce their effect. A medicine-specific professional review is important before use with any prescription anticoagulant or in people with malabsorption disorders.
Possible Side Effects
Reported adverse effects for oral phytonadione include flushing, unusual taste, dizziness, sweating, low blood pressure, rapid weak pulse, shortness of breath, and cyanosis. Other vitamin K products may have different tolerability depending on formulation and excipients.
Scientific Evidence
Peer-reviewed reviews and meta-analyses support vitamin K’s established role in coagulation and describe biological plausibility for bone effects. However, human trial data on bone outcomes are inconsistent. Some analyses suggest improvements in bone markers or bone mineral density in selected groups, but the evidence is not strong enough to confirm broad clinical benefit for fracture prevention.
Medical Information Notice
This page is an educational summary based on sources available at the time of review. It does not replace the official patient leaflet or assessment by a qualified healthcare professional.
Medical Sources
- DailyMed: PHYTONADIONE tablet
- DailyMed: MEPHYTON (phytonadione tablets) Vitamin K1
- Zhang Y, et al. “The combination effect of vitamin K and vitamin D on human bone quality: a meta-analysis of randomized controlled trials.” Food & Function (2020). PubMed
- Booth SL. “Effects of vitamin K on bone mass and bone metabolism.” Journal of Nutrition (1996). PubMed