Ohio State University Extension Fact Sheet: Vitamin A
- Provides basic functions, food sources, requirements, and graph detailing foods high in the vitamin with serving size.
- http://ohioline.osu.edu/hyg-fact/5000/5551.html

Vitamin A Supplementation
- Vitamin A supplementation advices and guidelines presented by World Health Organization.
- http://www.who.int/vaccines/en/vitamina.shtml

Facts About Vitamin A and Carotenoids
- Extensive information about the fat soluble vitamin including suggested RDA intake, role in human body functions, food sources, and deficiency signs.
- http://ods.od.nih.gov/factsheets/cc/vita.html

Vitamin A
- Discussion of function, deficiency, disease prevention, disease treatment, food sources, supplements, new research, and recommendations from the Linus Pauling Institute.
- http://lpi.oregonstate.edu/infocenter/vitamins/vitaminA/

Vitamin A or Retinol
- Discussion of the fat soluble vitamin including proper dosage, necessity in diet, and graph indicating good food sources.
- http://www.dietobio.com/vegetarisme/en/vit_a.html

Vitamin A and Your Nutrition
- Includes body functions, suggested intake, and food sources high in the vitamin.
- http://www.anyvitamins.com/vitamin-a-info.htm