Menaquinone-7 is a menaquinone whose side-chain contains seven isoprene units in an all-trans-configutation. It has a role as a Mycoplasma genitalium metabolite, a bone density conservation agent, an Escherichia coli metabolite, a human blood serum metabolite and a cofactor. Menaquinone-7 is a natural product found in Brevibacillus brevis.