In addition, everybody should have a healthy diet whether or not they are exercising. We all need to eat more fruits and vegetables and less animal fat, and limit our total fat intake to 30% of total calories. There is nothing different about the ideal diet for a person in an exercise program. One thing that does change, however, is that when people do exercise, research shows that they will eat more to make up for the extra energy they are burning up. This means that with exercise you can add good things like protein, vitamins and minerals to your diet without gaining weight.
Sixty percent of the elderly use supplements, however people should avoid relying heavily on vitamin pills, because nutrition scientists are constantly finding new healthy components in real food that provide benefits like lowering cholesterol and preventing cancer. These components have not been duplicated in pill form. All-purpose multivitamins are also safer than pills that deliver high doses of one vitamin or mineral; they are less likely to deliver too much of one and not enough of another. Some vitamin C pills, for example, contain a toxic amount which is 10 times the recommended dietary allowance. And the body can become dependent on high levels of a vitamin. People on heavy doses of vitamin C pills can develop scurvy when they stop taking the pills, even if they only drop to a normal vitamin C intake.
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