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Naturally occurring form of viamin D in animal tissues
Produced in the skin
Occurs naturally but in small amounts in egg yolk, liver, fish, fortified milk(pasteurized milk enriched with one or more nutrients, usually vitamins A and D, that has been standardized at 400 International Units per quart (fortified vitamin D milk).)
Transported into the lymph circulation via chylomicrons(particles of emulsified fat fount in the blood).
The ff can aversely affect vit. D absorption.
Pancreatitis, sprue (A chronic, chiefly tropical disease characterized by diarrhea, emaciation, and anemia, caused by defective absorption of nutrients from the intestinal tract), and malabsorption disorders.
§ Freezing foods may destroy vitamin K, but heating has no effect
RECOMMENDATIONS FOR PREGNANT & LACTATING WOMEN
< 18 years = 75 µg
19-30 years= 90 µg
31-50 years = 90 µg
Brest fed infants may be at an increased risk for vitamin K deficiency because human milk is not a good source of this nutrient. To improve the amount of vitamin K in breast milk the mother should eat the recommended amount of green vegetables daily.