Vitamin K is an essential vitamin that has many uses in the body. It helps with blood clotting, bone health, and maintaining good fatty acid balance. Vitamin K deficiency is a rare condition, but it can happen if you don’t get enough of it through your diet.

When it comes to dietary supplements and essential nutrients, we tend to think about either vitamin C – present in fruits and heavily marketed on product packaging, or vitamin D – derived from the sun and something we’re often told in the UK that we’re deficient in...