Vitamins A, D, E and K are fat-soluble, meaning that they dissolve
in fat and are carried by fat molecules throughout the body. If
we had no fat in our diets, we would be unable to reap the benefits
of these vitamins. These vitamins also can be stored in body fat,
so taking supplements of fat-soluble vitamins-especially vitamin
A or vitamin D-is risky unless prescribed by a doctor, since the
stored excess can build up to dangerous levels.
The B-vitamins and vitamin C are water-soluble, which means that
they dissolve in water and are carried throughout the body in the
bloodstream. These vitamins are not stored in the body. After the
body uses what it needs, any excess is excreted in urine.
Like vitamins, minerals are essential nutrients required to help
the body function properly.