Image for HCA vitamins article Around 400 BC, the celebrated Greek physician Hippocrates offered some advice about diet and health. He declared, "Let food be thy medicine and medicine be thy food." The growing number of Americans who turn to supplements to make up for a poor diet ought to pay attention to those words of wisdom.

Each day, millions of adults in the United States take high doses of vitamins and minerals with hopes of feeling better, getting sick less often, and living longer. For years, physicians told consumers that, at worst, they were just wasting their money. But now, the word is to be careful—because high doses of certain vitamins and minerals may actually increase the risk of disease.

As you probably already know, we need vitamins—by far the most popular choice of supplement—to live (that is, they are ‘vital’ to our survival). The body cannot make them on its own, so we must get vitamins from our diet. Similarly, we need minerals like iron and calcium to function, and must rely on outside sources to meet our requirements. (Other supplements, such as herbs, are a whole other story.)

Although supplements are a good idea in certain cases (such as for pregnant women, the elderly, and vegetarians), experts agree the best way for you to get the nutrients you need is by eating a well-balanced, healthful diet.