Vitamin K2

Calcium gets most of the credit for bone health. Vitamin K2 is what gets it to the right place.

This fat-soluble vitamin activates two key proteins: osteocalcin, which binds calcium into bone tissue, and matrix Gla protein (MGP), which clears calcium deposits from artery walls. Without adequate K2, calcium from food or supplements may end up in soft tissues rather than bone. Most Australians get enough vitamin K1 from leafy greens, but K2 is harder to source from diet alone, found mainly in fermented foods like natto and some aged cheeses.

Research supports a meaningful role for vitamin K2 in both bone density and cardiovascular health. Studies suggest MK-7 (menaquinone-7), a long-chain form, stays active in the body for several days and may sustain protein activation more effectively than shorter-chain MK-4. Pairing a vitamin K2 supplement with vitamin D3 tends to produce better outcomes for calcium metabolism, since both nutrients work on overlapping pathways.

People taking calcium supplements, those with concerns about bone density, postmenopausal women, and anyone wanting to support long-term cardiovascular health commonly reach for vitamin K2 supplements. Adding it to an existing vitamin D3 routine makes practical sense.

NutritionMarket stocks trusted Australian brands offering MK-7 derived from fermented chickpea or natto, available in softgel and capsule forms. Take a look through the range and find the right option for your needs.