• Fat soluble Vitamins

• Molecules that the body cannot make itself
• dissolve in fat
• must consume in/with fat
• Need to as to both take part in metabloism and to act as hormones
Role of Fat Soluble Vitamins
 
• These vitamins have a more direct role in metabolism than the Water Soluble Vitamins
• Need to roles like hormones eg Vit A, D
• Needed for involvement in physiological functions Vit E, K

• Need to allow Calcium uptake
• stimulates production of Calcium Binding Proteins (CBP)
• this allows uptake of calcium from the gut , bone and urine
• but Vitamin D has to be activated before it can work
• Vit D works together with Parathyroid Hormone (PTH)
• Too little Vit D causes extra PTH
• PTH is a vasoactive and

Deficiencies

• Rickets
• Infants
• very bad in china still
• Osteomalacia
• Adults
• Osteoporosis
• Older adults
• hypertension
• Effects every one
• More in higher latitudes where less sun
• more important than too much salt
Source of Vitamin D
• Made in the Skin form Cholesterol
• need UV light
• more deficiency in higher latitudes
• (Victoria. > Queensland)
• Vit. D₃ made in skin (Called pro Vit D)
• Must be oxidised in Lung then Kidney to produce Active Vit. D ( DHCC)
• 
• Excess
• dangers of food supplantation?

• Needed to form Visual purple in the retina of eye
• Hormonal action
• regulates cell differentiation
• Immune system
• Blood cells
• skin
• hair
• Embryonic development
• Cancer
Deficiencies of Vitamin A
 
• Deficiency permanently blinds some 250,000 children a year.
• Infectious Childhood illnesses, contributing to 30% of the deaths of under 5 yo.s
• Vitamin A supplementation could prevent 1 to 3 million child deaths each year .

• The lack of vitamin A not only of blindness,
• It also results in diarrhoea and other infections.
• These repeated attacks of diarrhoea may bring about the final eye damage which destroys sight.
Sources of Vitamin A
• beta - carotene
• Converted into Vit A
• Liver, eggs, butter margarines, fish oil
• Green and red vegetables

Vitamin E
 
• Natural Anti-oxidant
• Stops production of Free Radicles
• Free radicles react with many compounds
• DNA ->> mutations
• Fats ->> membrane fracture
• Ageing
Source of Vitamin E
 
• Wheatgerm
• Unprocessed vegetable oils
• Nuts
• green vegetables
• Vitamin K

• Need for blood clotting

• formation of prothrombin
• Source
• Fats and Oils
• vegetables
• Intestinal bacteria

Disclaimer: This page, its contents and style, are the responsibility of the author and do not necessarily represent the views, policies or opinions of William Angliss Institute of TAFE. All content remains the property of William Angliss Institute of TAFE.

 

Prepared by Barry Brazier

 

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William Angliss Institute	Nutrition Australia	Australian Nutrition Foundation	AIFST
Hospitality Association	Barry Brazier	Hospitality Network	About Melbourne