Jarrow Formulas MK-7 90 mcg, 90 Cápsulas Blandas - Vitamina K2 (Menaquinona-7)

What is Vitamin K2 (MK-7)?

Vitamin K is a family of fat-soluble nutrients essential for blood clotting and bone health. There are two main forms: vitamin K1 (phylloquinone), found in green leafy vegetables, and vitamin K2 (menaquinone), found in fermented foods and animal products. Within vitamin K2, menaquinone-7 (MK-7) is one of the most bioavailable and long-acting forms. Jarrow Formulas MK-7 provides 90 mcg of this bioactive form per softgel, naturally extracted from natto (fermented soybeans).

MK-7 is characterized by its longer half-life in circulation compared to K1, which helps maintain stable vitamin K levels in the body. This makes it an ideal choice for those seeking continuous support for normal clotting and calcium fixation in bones.

Benefits supported by the EFSA

According to the European Food Safety Authority (EFSA), vitamin K contributes to normal blood coagulation and the maintenance of normal bones. These claims are approved for all forms of vitamin K, including K2 MK-7.

By activating proteins such as osteocalcin and matrix Gla protein (MGP), vitamin K2 helps direct calcium to bones and teeth, preventing its accumulation in soft tissues such as arteries. Although the EFSA has not approved a specific claim for cardiovascular health, numerous observational studies link adequate K2 intake with improved arterial elasticity and a lower risk of calcification. Jarrow Formulas MK-7 is presented as a food supplement that supports these physiological processes without intending to cure or prevent diseases.

How to take Jarrow Formulas MK-7?

The recommended dose for adults is one softgel daily, preferably with a meal containing some fat (such as olive oil, avocado, or nuts) to optimize absorption. Each capsule provides 90 mcg of MK-7, an amount that covers the recommended daily intakes for vitamin K in the European Union (75-120 mcg/day in adults).

To maintain freshness and potency, store the container in a cool, dry place, protected from light and heat. Do not exceed the indicated daily dose. If you are taking anticoagulant medication (such as warfarin/acenocoumarol), consult your doctor before starting supplementation, as vitamin K can interfere with these drugs.

Who can benefit from vitamin K2?

Although a balanced diet usually provides sufficient amounts of vitamin K1, K2 is less common in modern diets. Groups that may consider supplementation include:

• Elderly people: with age, the ability to absorb and utilize vitamin K may decrease, increasing the risk of bone fractures.
• Individuals with restrictive diets: vegans, people with intolerances or allergies that limit the consumption of fermented foods and dairy products.
• Those taking antibiotics long-term: these can alter the intestinal flora that synthesizes part of vitamin K2.
• People with malabsorption disorders: diseases such as celiac disease or inflammatory bowel disease can reduce the absorption of fat-soluble vitamins.

Jarrow Formulas MK-7 is suitable for vegetarians, as the capsules are plant-based (hypromellose), and it is free of gluten, soy, dairy, and other common allergens, making it suitable for most diets.

Possible side effects and interactions

Vitamin K2 is generally well tolerated. At high doses (well above the recommended), mild digestive discomfort could occur. No toxicity levels have been established for vitamin K, but the indicated dose should always be respected.

Important warning: People undergoing treatment with vitamin K antagonist anticoagulants (e.g., warfarin, acenocoumarol) should consult a doctor before taking any vitamin K supplement, as it could counteract the effect of the medication. In contrast, those using new-generation anticoagulants (such as dabigatran, rivaroxaban) usually have no restrictions, but it is advisable to inform the specialist.

If you are pregnant, breastfeeding, or have any medical condition, consult your healthcare professional before starting supplementation.

Frequently Asked Questions

What is the difference between vitamin K1 and K2?

K1 (phylloquinone) is found in green vegetables and acts primarily in the liver for coagulation. K2 (especially MK-7) is better distributed throughout the body, reaching bones and arteries, where it activates proteins that regulate calcium. That's why K2 is often the preferred form for bone and cardiovascular maintenance.

Can I take this supplement with vitamin D3?

Yes, in fact, vitamin D3 and K2 work synergistically: D3 increases calcium absorption and K2 directs it to the bones. Many people combine both supplements for complete bone support.

How is the product stored?

Store in a cool, dry place, between 15-25 °C, protected from direct light and humidity. Refrigeration is not necessary.

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This product should not be used as a substitute for a balanced diet. Do not exceed the recommended dose. Keep out of reach of children.