11:709:255 Lecture Notes - Lecture 10: Coeliac Disease, Vitamin K, Gastrointestinal Tract
25 Mar 2020
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Document Summary
Fat soluble vitamins part 1: vitamins, essential organic substrates, yield no energy, but facilitate energy yielding chemical reactions, if absent from a diet, leads to deficiency signs and symptoms, fat-soluble and water soluble vitamins. Vitamins are lost with. : improper storage, excessive cooking, exposure to light, exposure to alkaline, long storage time. Vitamin a: history: ancient egyptians treated night blindness by using topical applications of liver juices. Little did they know at the time, the liver stores vitamin a and the vitamin in the liver joices helped. Retinoids: sources of vitamin a, preformed, liver, fish oils, fortified milk, eggs, contributes to half of all the vitamin a intake, proformed, dark leafy green, yellow-orange vegetables/fruits, contributes to half of all the vitamin a intake. Absorption of vitamin a: absorbed like dietary fat, 90% of retinoids can be absorbed, only 3% of carotenoids are absorbed, absorbed intact, intestinal cells convert carotenoids to retinoids.
