Part one of term paper
In the early 20th century the discovery of began. Today there is a chance that there are some that are still undiscovered. The definition of vitamin is: one of several substances necessary for animal nutrition, and occurring in minute quantities in natural foods; numerous types have been distinguished, and designated by the letters of the ...

Part two of term paper
... In 1906, the British biochemist Sir. Frederick Hopkins demonstrated that foods contain accessory factors in addition to proteins, carbohydrates, fats, minerals and water. Then, in 1912, thee chemist Casimir Funk identified that the antiberiberi substance in unpolished rice was an amine (a type of Nitrogen-containing compound), so Funk proposed that it be named vitamine, from vital amine. It was later discovered that different vitamins have different chemical properties. This discovery caused ...