Video: The chemicals we leave behind

Everything we use is made out of chemicals. So it's not surprising that we pick up a lot of foreign molecules from what we bump into all the time, from our multivitamins to the gas we put in our cars.

Multivitamin

A multivitamin is a preparation intended to supplement a human diet with vitamins, dietary minerals, and other nutritional elements. Such preparations are available in the form of tablets, capsules, pastilles, powders, liquids, and injectable formulations. Other than injectable formulations, which are only available and administered under medical supervision, multivitamins are recognized by the Codex Alimentarius Commission (the United Nations' authority on food standards) as a category of food. Multivitamin supplements are commonly provided in combination with dietary minerals. A multivitamin/mineral supplement is defined in the United States as a supplement containing 3 or more vitamins and minerals that does not include herbs, hormones, or drugs, where each vitamin and mineral is included at a dose below the tolerable upper level, as determined by the Food and Drug Board, and does not present a risk of adverse health effects. The terms multivitamin and multimineral are often used interchangeably. There is no scientific definition for either.

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