Salvatore who is a typical adult eating a well balance diet chances would be he will not need then to take vitamin supplements which is the answer. A balance diet is needed to have good health. It means to eat plenty from the 4 main groups and limit smaller from 5th group.
The plant grew about 0.21 cm a day. Was this the question?
Give 50 subjects 500 milligrams a day.
Give 50 subjects 1000 milligrams a day.
Give 50 0 milligrams a day.