Choosing and Using Supplements
At least half of American adults take a daily dietary supplement—vitamins, minerals, or herbs, with annual sales approaching $23 billion. Although such dietary insurance can be a benefit, many people take
them without knowing enough to ensure optimum results. To assess how much you know about dietary
supplements, answer the following statements true or false.
10. Multivitamins should contain no more than 100 percent of the RDAs for vitamin A, C, D, E, thiamin, riboflavin, niacin, vitamin B6, folic acid, vitamin B12, calcium, magnesium, zinc, iodine, and selenium.