Vitamin K (napthoquinones)  Menaquinone- Bacteria present in the intestine  Phylloquinones- Plant sources e,g, spinach, cabbage  Menadione-synthetic.

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Presentation transcript:

Vitamin K (napthoquinones)  Menaquinone- Bacteria present in the intestine  Phylloquinones- Plant sources e,g, spinach, cabbage  Menadione-synthetic vitamin K

Vitamin K - Napthoquinones Functions  Constituent of prothrombin which is necessary in blood clotting  Helps maintain calcium levels in bones Effects of deficiency  Abnormal clotting, bleeding.  Deficiency is rare

Vitamin K - Napthoquinones Sources Dark green vegetables Liver Lean meat Eggs Manufactured by bacteria in intestine

Vitamin K - Napthoquinones Properties  Fat soluble  Insoluble in water  Stable to heat, unaffected by cooking  Destroyed by light, strong acids, alkalis RDA No definite RDA