Any extra nutrients that are taken to help a specific condition when someone is not getting all they need from their food.
A pill or product regarded as helpful in improving health that can be bought without a prescription. Supplements are not tested in the same way as prescription drugs.
Nutrient taken in addition to regular food in one of many forms such as pills, powder, or liquid.
An additive (e.g., something added to a food to increase its nutritive value).