Vitamins (FAT SOLUABLE)

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  • Created by: Karen321
  • Created on: 16-05-17 18:01
Function of Vitamin A
Makes RHODOPSIN (visual purple), maintenance of mucous membranes, antioxidant, growth and cell metabolism
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Sources of Vitamin A
Retinol (liver, milk, fortified margarine) Beta Carotene (yellow, orange, dark green veg)
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Deficiency of Vitamin A
XEROPTHALMIA, KERATOMALACIA, night blindness, stunted growth in children
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Excess of Vitamin A
Toxic, liver damage, birth defects, skin disorders, bone damage, hypervitaminosis A
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Absorption and bioavailability of Vitamin A
Stored in liver (toxic), retinol more readily absorbed than carotene, not affected by cooking, protein deficiency and diarrohea may reduce efficiency
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Functions of Vitamin D
Promotes calcium absorption with phosphorus, stimulates synthesis of calcium binding proteins required for calcium absorption, reduction of inflammation, immune function
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Sources of Vitamin D
Sunlight, egg yolk, milk
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Deficiency of Vitamin D
Toddlers/children - rickets , adults- osteomalacia , overuse of suncreams, reduced sun exposure e.g. elderly, asian cultures
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Excess of Vitamin D
Excreted in urine, calcium may be deposited in soft tissues (extreme cases - death)
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Absorption and bioavailability of Vitamin D
Fat helps absorption of vitamin in intestine, obesity shown to reduce vitamin D bioavailability due to its deposition in fat containing tissues, exposure to sunlight regularly enhances absorption
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Functions of Vitamin E
Reproduction, muscle contraction and relaxation, antioxidant
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Sources of Vitamin E
Nuts, egg yolk, fortified cereals, veg oils
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Deficiency of Vitamin E
Low levels of vitamin e may impair cognitive function of brain and contributes to dementia, symptoms include: gallstones,cancer,loss of muscle co-ordination, haemolytic anaemia, odemea
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Excess of Vitamin E
May improve sports performance, slows ageing process, improves immunity
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Absorption and bioavailability of Vitamin E
Liver, pancreatic or bilary disease reduces absorption and cystic fibrosis or coeliac disease also reduces absorption
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Functions of Vitamin K
Essential in formation of blood clotting proteins, required for normal bone structure (increases bone density)
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Sources of Vitamin K
Synthesised by bacteria in gut, dark green leafy veg, dairy and red meat
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Deficiency of Vitamin K
Signs of deficiency- bleeding and bruising easily, newborn infants - low level of Vitamin K in breast milk and may develop Vitamin K Deficiency Bleeding (VKDB) - may cause blled in brain, risk of brain damage
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Absorption and bioavailability of Vitamin K
Liver, pancreatic or bilary disease may reduce absorption
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Other cards in this set

Card 2

Front

Sources of Vitamin A

Back

Retinol (liver, milk, fortified margarine) Beta Carotene (yellow, orange, dark green veg)

Card 3

Front

Deficiency of Vitamin A

Back

Preview of the front of card 3

Card 4

Front

Excess of Vitamin A

Back

Preview of the front of card 4

Card 5

Front

Absorption and bioavailability of Vitamin A

Back

Preview of the front of card 5
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