1. Vitamin A - Retinol and Beta-Carotene
Pure Vitamin A
Only found in animal foods
Beta-Carotene Pro-Vitamin A Converted to Vitamin A in gut wall

2. Vitamin A – Retinol and Beta-Carotene
Functions
Regulates growth
Promotes healthy skin
Maintenance of healthy epithelial tissues
Necessary for production of Rhodopsin - pigment in retina, helps eye adapt to dim light
Effects of deficiency
Restricted growth
Dry mucous membranes
Xeropthalmia - dry eye membrane/ blindness
Night blindness
Susceptibility to infection

3. Vitamin A - Retinol and Beta-Carotene
Sources
Retinol - Cod liver oil, liver, dairy products, herring, egg yolk
Beta-Carotene
Dark green leafy
vegetables, broccoli,
carrots, deep orange
fruits and vegetables

4. Vitamin A - Retinol and Beta-Carotene
Properties
Yellow
Fat soluble
Insoluble in water
Can be destroyed by oxygen, light and air
Some reduction in dehydration
Powerful antioxidant
RDA
See text book pg. 34