Vitamin K ( Naphthoquinones )

Types of Vitamin K

Types of Vitamin K

Phylloquinone(K1)-made by plants Menaquinone(K2)-made by intestinal bacteria Menadione(K3)-synthetic form

Biological functions

Majeur role in calcium metabolism- Vitamin k interacts with Vitamin D to maintain calcium levels in bone, Auds blood clotting as helps to make clotting proteins such as prothrombin

Effects of deficiency

Delayed blood clotting, newborn babies may need supplements due to their restricted diet and lack of intestinal bacteria

Sources

Dark green vegetables- broccoli, cabbage. Peas, cereals, synthesised in small intestine by bacteria

Properties

Fat soluble, insoluble in water, heat stable, destroyed by UV light