Vitamin K is a crucial nutrient that's often overlooked. It contributes to normal blood clotting – the process that lets wounds close properly – and to the maintenance of normal bones. Despite these important roles, it doesn't get anything like the attention of vitamins C or D.
We get most of our vitamin K from food, particularly dark leafy greens, with some also made by the good bacteria in the gut. Deficiency is rare, so most people who eat a varied diet get all they need. It's available as a supplement too, often combined with vitamin D and calcium for bone support. One important note: if you take blood-thinning medication such as warfarin, speak to your GP or pharmacist before taking vitamin K, as it can affect how those medicines work.
