Vitamin K2 (MK-7)

The Vitamin K2 collection by Viva Saudável brings together supplements from brands such as Thorne Research, NOW Foods, Solaray, Zeinpharma and Good Care. Find vitamin K2 in MK-7 and MK-4 forms, isolated or combined with vitamin D3, in capsules and liquid form, with doses ranging from 100 µg to 1 mg per serving.

What is Vitamin K2 and what distinguishes MK-7 from MK-4

Vitamin K2, or menaquinone, is one of two natural forms of vitamin K — the other is K1, or phylloquinone, found mainly in dark green leafy vegetables. K2 is found in fermented foods and animal products, and is named after the number of isoprenoid units in its side chain: MK-4 has four, MK-7 has seven. MK-7 is usually obtained by fermenting soybeans with Bacillus subtilis natto and remains in circulation longer; MK-4 is eliminated more quickly.

Vitamin K as a nutrient, whatever its form: contributes to normal blood clotting and to the maintenance of normal bones. These are the only two claims in the European register for this vitamin.

Doses and an important warning

If you take anticoagulants, such as warfarin, do not start any vitamin K supplement without first speaking to your doctor: vitamin K directly interferes with the mechanism of action of these medications.