If only for its high concentration of vitamin B61 medium potato contains over onehalf of a milligram of this important nutrientthe potato earns high marks as a healthpromoting food. Vitamin B6 is involved in more than 100 enzymatic reactions. Enzymes are proteins that help chemical reactions take place, so vitamin B6 is active virtually everywhere in the body. Many of the building blocks of protein,amino acids, require B6 for their synthesis, as do thenucleic acidsused in the creation of our DNA. Because amino and nucleic acids are such critical parts of new cell formation, vitamin B6 is essential for the formation of virtually all new cells in the body.