Ingredients

Vitamin K2

Menaquinone · Menaquinone-7 · MK-7 · Menaquinone-4 · MK-4 · Menatetrenone

Vitamin K2 is the name for a group of vitamin K forms called menaquinones, sharing the same 2‑methyl‑1,4‑naphthoquinone core and differing by the length of their isoprenoid side chain. It occurs naturally in certain fermented foods and in animal-derived foods, and in the body some vitamin K can be converted into specific menaquinone forms. In supplements, vitamin K2 is most commonly provided as menaquinone‑7 (MK‑7) or menaquinone‑4 (MK‑4), typically dissolved in oil and filled into softgels, or deposited onto carriers such as microcrystalline cellulose for tablets and capsules. On labels it may appear as “menaquinone”, “MK‑7”, or “MK‑4”, with amounts usually declared in micrograms. In cosmetics, vitamin K and related derivatives may be used in low-percentage topical formulas, often in oil-soluble or encapsulated delivery systems. As a fat‑soluble vitamin, it is commonly formulated with lipid ingredients to support stability and dispersion within the product.