Some key terms to understand on the labels of vitamins and minerals:
- Recommended Dietary Allowance (RDA) and Adequate Intake (AI) are how much you need to keep healthy. They’re tailored by age and gender.
- Tolerable Upper Intake Level (UL) is the most amount you can safely take. Taking too much of some nutrients can lead to an overdose or serious side effects.
- Daily Value (DV) is the only measurement you’ll see on packaged foods and supplements. It’s how much of a vitamin or nutrient should make up a diet of 2,000 calories a day. The DV is sometimes the same as the RDA.