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Vitamin A

Vitamin A belongs to a class of compounds called retinoids which only occur in animal products.

Vitamin A was the first fat-soluble vitamin to be recognized. It was discovered in 1913 as a result of its ability to prevent night blindness.


BIOLOGICAL FUNCTION & EFFECT:

• eyes and vision

• cancer

Studies show that adequate intake of vitamin A shows a reduced risk of epithelial-cell cancers [mouth, skin, lung, bladder, etc.

• epithelial cells

Vitamin A maintains the membrane-secreting cells that line all glands and organs.

• immune system

Vitamin A facilitates in creating barriers to infection (with healthy epithelial cells).


•growth and bone development

Vitamin A is essential for the growth of bone and soft tissue and necessary for the formation of tooth enamel.


• SOURCES

Liver, kidney, butter, egg yolk, whole milk, cream


• NOTES

Hypervitaminosis with vitamin A has been reported in adults taking in excess of 50,000 IU daily for several years and in a case of taking a water-soluble synthetic vitamin A at 18,5000 to 60,000 IU for several months


— information on this page is summarized from page 350-51, Pelton
NUTRIENTS

• Beta carotene
• Biotin
• Boron

• Calcium
• Carnitine
• Chloride
• Choline
• CoEnzymeQ10
• Copper

• Folic Acid
• Glutathione

• Inositol
• Iodine
• Iron

• Magnesium
• Manganese
• Molybdenum
• Phosphorus
• Potassium
• Sodium

• Vitamin A

• Vitamin B1
• Vitamin B2
• Vitamin B3
• Vitamin B5
• Vitamin B6
• Vitamin B12

• Vitamin C
• Vitamin D
• Vitamin K

• Zinc
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