Adenine (Vitamin B-4) - Purine that is definitely not a vitamin.
Amygdalin (Vitamin B-17, Laetrile) - Anticancer agent and vitamin--not!
Anthranilic Acid (Vitamin L) - A factor originally thought to be important for lactation.
Ascorbic Acid (Vitamin C) - One of the most ubiquitous vitamins ever discovered.
Beta-Carotene (Vitamin A precursor) - Yellow pigment that forms vitamin A.
Biotin (Vitamin H) - Carbon dioxide carrier that builds fats.
Cholecalciferol (Vitamin D) - The vitamin made from rich sunlight.
Cyanocobalamin (Vitamin B-12) - A vitamin that treats pernicious anemia.
Folic Acid (Folate, Vitamin B-9) - A vitamin that helps fetus development during pregnancy.
Inositol (Myo-Inositol) - A useful sugar once thought to be a!vitamin.
Menadione (Vitamin K) - A fat-soluble vitamin that helps to clot blood.
Niacin (Nicotinamide, Vitamin B-3) - A pyridine important in nucleic acid metabolism.
PABA (Para-aminobenzoic acid, Vitamin B-x) - Bacterial vitamin that serves as a sunscreen.
Pangamic Acid (Vitamin B15) - The non-vitamin "vitamin" that cures everything.
Pantothenic Acid (Pantothenate, Vitamin B-5) - Important for normal growth.
Pyridoxine (Pyridoxal phosphate, Vitamin B-6) - A very versatile coenzyme.
Retinol (Vitamin A) - The first vitamin to be discovered.
Riboflavin (Vitamin B-2) - The vitamin that gives urine its yellow color.
Thiamine (Vitamin B-1) - A sure cure for Beriberi.
Alpha-Tocopherol (vitamin E) - What some people call the "love" vitamin is really a free radical scavenger.