Vitamina K-2 100 mcg (Menaquinona-4 MK-4) – NOW Foods, 100 Cápsulas Veganas

What is vitamin K-2 and how does it differ from vitamin K-1?

Vitamin K is a family of fat-soluble nutrients essential for blood clotting and bone health. It is divided into two main forms: vitamin K-1 (phylloquinone), found in green leafy vegetables, and vitamin K-2 (menaquinone), produced by intestinal bacteria and found in fermented foods such as natto. Vitamin K-2 is biologically more active and has a longer half-life in the body, making it a superior form for maintaining long-term health.

Menaquinone-4 (MK-4) is one of the most studied forms of vitamin K-2. It is naturally found in animal products such as liver and egg yolk. This NOW Foods supplement provides 100 mcg of MK-4 in vegan capsules, ideal for those seeking a concentrated and bioavailable source.

Benefits of vitamin K-2 for bone and cardiovascular health

Vitamin K-2 plays a crucial role in calcium metabolism. It acts by activating osteocalcin, a protein that fixes calcium in the bone matrix, which contributes to the maintenance of normal bones. In addition, vitamin K-2 helps direct calcium to bones and teeth, preventing it from being deposited in arteries and soft tissues. This promotes adequate cardiovascular health by maintaining arterial flexibility.

The EFSA (European Food Safety Authority) has approved the following health claims for vitamin K: "Vitamin K contributes to normal blood coagulation" and "Vitamin K contributes to the maintenance of normal bones". This supplement naturally supports these processes.

How much vitamin K-2 do you need? Recommended dose

The adequate intake of vitamin K for adults is around 120 mcg per day for men and 90 mcg for women, although individual needs may vary. This food supplement provides 100 mcg per capsule, an amount that helps meet daily requirements. It is recommended to take one capsule daily with a meal containing fat to optimize absorption, as vitamin K is fat-soluble.

For people with absorption problems, restrictive diets, or anticoagulant treatments, it is essential to consult a healthcare professional before starting supplementation. The maximum tolerable dose has not been conclusively established, but high doses (above 500 mcg) can interfere with medications such as warfarin.

Differences between menaquinone-4 (MK-4) and menaquinone-7 (MK-7)

There are several subtypes of vitamin K-2, the most common being MK-4 and MK-7. MK-4 has a shorter half-life (a few hours) and is widely distributed throughout the tissues, while MK-7, from natto, remains active in the blood for longer. MK-4 is the form used in this supplement because it is naturally found in the human body and has been widely researched for bone health.

Being a fast-acting form, MK-4 is rapidly metabolized and accumulates in tissues such as the liver, pancreas, and bones. For sustained release, some prefer MK-7, but MK-4 remains an excellent choice for daily bone density maintenance.

How to choose the best vitamin K-2 supplement

When selecting a vitamin K-2 supplement, consider the form (MK-4 or MK-7), dosage, purity, and certifications. This NOW Foods product is vegan, gluten-free, soy-free, dairy-free, egg-free, nut-free, kosher, and halal. In addition, it is manufactured under strict GMP quality controls, with ISO/IEC accredited laboratories that verify stability, potency, and formulation.

Vitamin K-2 is especially important for people with low intake of green leafy vegetables, those over 50, or those taking antibiotics or medications that affect gut flora. For maximum benefit, combine it with vitamin D and calcium, as they work synergistically in bone metabolism.

Possible side effects and contraindications

Vitamin K-2 is considered safe in adequate doses. No significant adverse effects have been reported with an intake of 100 mcg per day. However, people taking anticoagulants (such as warfarin) should avoid vitamin K supplementation without medical supervision, as it can interfere with medication. Pregnant or breastfeeding women should consult their doctor before use.

This product is a food supplement and should not be used as a substitute for a balanced diet. Maintaining a varied diet and a healthy lifestyle is essential for overall health.