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Vitamin K

Vitamin K
 
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Solgar Vitamin K1 100ug 100 Tablets
Solgar Vitamin K1 100ug 100 Tablets
Price: £5.75
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Solgar Vitamin K2 100ug 50 Capsules
Solgar Vitamin K2 100ug 50 Capsules
Price: £24.99
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About Vitamin K 

Vitamin K is a fat-soluble vitamin. Phylloquinone, the natural Vitamin K found in Alfalfa and other foods, was discovered in Denmark and labelled Vitamin K for the Danish word, Koagulation. Food-source Phylloquinone is termed K1, while the Menaquinone produced by our intestinal bacteria is labelled Vitamin K2. A synthetic compound with the basic structure of the Quinones is Menadione, or Vitamin K3.

Vitamin K is important for proper blood clotting or coagulation in humans. It is essential for the synthesis by the liver of four blood clotting proteins. Without Vitamin K, the level of the blood clotting proteins in the blood is reduced and clotting time is prolonged. Vitamin K is also widely recognised for its role in the maintenance and health of bone. The mechanism for this may be due to Vitamin K’s ability to activate calcitonin thus aiding the absorption of Calcium into the bone. Therefore when supplementing with Calcium, it is always advised to take Vitamin K at the same time.

Since natural Vitamin K is fat soluble, it requires bile and pancreatic juice in the intestine for maximum absorption. By contrast, some of the synthetic Vitamin K compounds (K3) are water soluble and more easily absorbed and are subsequently used by people who may not tolerate natural Vitamin K well, such as those with decreased bile acid secretion. Absorption of Vitamin K takes place mainly in the upper part of the small intestine with the help of bile or bile salts and pancreatic juices and then carried to the liver for the synthesis of prothrombin, a key blood-clotting factor.

Vitamin K is found in both plant and animal sources in nature. Good supplies are found in dark leafy greens, most green plants, Alfalfa and Kelp. Blackstrap molasses and the polyunsaturated oils such as Safflower also contain some Vitamin K. In animal-source foods, Vitamin K is found in liver, milk, yoghurt, egg yolks and fish liver oils. The best source for humans is that made by the intestinal bacteria which is why Vitamin K supplementation is particularly important for those whose normal balance of intestinal flora has been disrupted.

K2 is a more active form than K1 and has been found to have additional benefits supporting the heart and vascular system. 



 

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