Functions of Vitamins beyond Recommended Dietary Allowances

It is generally accepted that the basic needs of vitamins are covered by the so-called Recommended Dietary Allowances, which were originally established mainly to prevent deficiencies. However, there is more and more scientific evidence accumulating that several vitamins have additional functions, each requiring a different, but usually higher amount than the one set for the prevention of the respective classical vitamin deficiency. Such additional functions include the radical scavenging effect