Supplements containing carefully balanced amounts of vitamins and minerals are the best option for several reasons. Such a compositions provide all the necessary micro and macro elements in a single dose. It is a great convenience, especially for busy or elderly people. Also, a composition of many substances has another very important feature. Many of these compounds work optimally only in the presence of other substances. Such an example are the B vitamins, where particular elements work synergetic – having influence on each other they strengthen their work in the respective areas of the body. Complexes of vitamins and minerals are also prepared as sets for the particular groups of people such as pregnant women etc, which is also a great help.