Biomolecules
Wikipedia Isomer
https://en.wikipedia.org/wiki/Isomer
Vitamins
Linus Pauling Institute Micronutrient Information Center
http://lpi.oregonstate.edu/mic/vitamins
Food and Nutrition Information Center
https://www.nal.usda.gov/fnic/vitamins-and-minerals
WebMD
http://www.webmd.com/vitamins-supplements/
Harvard Health Publications
http://www.health.harvard.edu/staying-healthy/listing_of_vitamins
ConsumerLab.com
https://www.consumerlab.com/RDAs/
Canadian Food Inspection Agency (CFIA)
http://www.inspection.gc.ca/eng/1297964599443/1297965645317
Wikipedia
https://en.wikipedia.org/wiki/Vitamin
https://en.wikipedia.org/wiki/Dietary_Reference_Intake
Wikiversity
https://en.wikiversity.org/wiki/Optimum_Daily_Intake
Dietary Reference Intakes for Thiamin, Riboflavin, Niacin, Vitamin B6, Folate, Vitamin B12, Pantothenic Acid, Biotin, and Choline (1998)
http://www.nap.edu/read/6015/chapter/1
U.S. National Institutes of Health
https://ods.od.nih.gov/factsheets/list-all/
Nutrition Data
SELFNutritionData
http://nutritiondata.self.com/
Nutrition Value
