How to read a multivitamin label, line by line
Nutriens editors
A multivitamin label packs twenty-odd lines into a small box, and most of us read only the front of the bottle. The Supplement Facts panel on the back is where the real answers are. Here is how to read one, in order, using our own Daily Foundation panel as the worked example.
1. Start with the serving size
Every amount on the panel is per serving, and a serving is often more than one capsule. Daily Foundation's serving is 2 capsules, with 30 servings in a bottle of 60. So "150 mg vitamin C" means 150 mg across two capsules, and the bottle lasts 30 days, not 60.
Then find the suggested use. Daily Foundation's is 2 capsules in the morning with a meal. A panel only makes sense alongside the directions.
2. Read the amount first, then the %DV
The amount column tells you how much is in a serving. The %DV column compares that amount with the Daily Value, a reference number the FDA sets for labels. It is a yardstick, not a target and not a limit.
| Line on Daily Foundation | Amount | %DV |
|---|---|---|
| Vitamin D (as cholecalciferol) | 10 mcg | 50% |
| Vitamin C (as ascorbic acid) | 150 mg | 167% |
| Zinc (as zinc oxide) | 15 mg | 136% |
| Vitamin B12 (as cyanocobalamin) | 27 mcg | 1125% |
| Calcium (as calcium carbonate) | 50 mg | 4% |
A %DV above 100 isn't automatically a problem, and one far below 100 isn't automatically a flaw. Calcium is a good example: a full day's calcium won't fit in two capsules, so most multis carry a small amount.
The number that matters for safety is the Tolerable Upper Intake Level (UL), set by the National Academies for some nutrients. Vitamin B12 has no UL. Folic acid does: 1,000 mcg a day for adults from supplements and fortified foods. That is why stacking several products is where label reading counts most.
3. Learn the three odd units
- mcg RAE (retinol activity equivalents) for vitamin A. It accounts for the fact that beta-carotene and retinol aren't used one-to-one.
- mcg DFE (dietary folate equivalents) for folate. Folic acid is absorbed better than food folate, so the label converts it. Daily Foundation prints "680 mcg DFE (400 mcg folic acid)": 400 mcg of folic acid counts as 680 mcg DFE.
- mg NE (niacin equivalents) for niacin.
Vitamin D is now listed in mcg; older labels used IU. 1 mcg equals 40 IU, so 10 mcg is 400 IU.
4. Read the forms in parentheses
"As cholecalciferol" tells you the vitamin D is D3. "As beta-carotene" tells you the vitamin A comes from a carotenoid your body converts as it needs, not preformed retinol. The ODS notes the UL for vitamin A applies to preformed vitamin A, not beta-carotene; if you smoke, its vitamin A fact sheet has a note on high-dose beta-carotene worth reading with your doctor.
Forms also explain mineral choices. Daily Foundation's magnesium is magnesium oxide, a compact form that suits a 50 mg base dose. A full dose on its own is a different product; see magnesium glycinate explained.
5. Look for blends, and what they print
A blend lists several ingredients under one total. The label shows what is in it, not how much of each. Some products hide their main ingredients this way.
Daily Foundation has three blends, and we'd rather you know exactly how they read. Every vitamin and mineral has its own dose printed. The three botanical blends print their totals: health support (170 mg: lutein, lycopene, stinging nettle root, saw palmetto), immune support (110 mg: echinacea, beta glucan, spirulina, garlic) and antioxidant fruit & energy (190 mg: green tea extract, Chinese hawthorn, cinnamon, bilberry, grape, black currant, pomegranate). Their %DV shows "**" because no Daily Value exists for them.
If you want an exact milligram of one botanical, a single-ingredient product is the way to get it.
6. Notice what isn't there
What a panel leaves out can matter as much as what it lists. Daily Foundation's panel has no iron, no iodine and no vitamin K. If your doctor has told you that you need iron, for example, this isn't where it comes from. It also has no omega-3s; that is Omega Foundation's job.
7. Finish with other ingredients and allergens
Below the panel: rice flour, hypromellose (the vegetable capsule), magnesium stearate and silicon dioxide. The label lists no allergens.
Who should read it with a doctor
- Anyone pregnant, trying to be, or nursing. Needs change, and a prenatal is designed differently.
- Anyone taking medication, or stacking single vitamins on top of a multi.
- Anyone with lab tests coming up: the FDA has warned that biotin can interfere with some lab results. Daily Foundation has 300 mcg, so tell your doctor you take it.
Where to go next
What each ingredient does is in what's actually in a complete daily foundation. The general version of this guide, for any supplement, is how to read a label like a pro. When you are ready to take it, the Daily Foundation breakfast routine sets it up, and the Daily Foundation FAQ has the short answers.
References
- U.S. Food and Drug Administration. "Dietary Supplement Labeling Guide." fda.gov
- NIH Office of Dietary Supplements. "Multivitamin/mineral Supplements: Fact Sheet for Health Professionals." ods.od.nih.gov
- NIH Office of Dietary Supplements. "Folate: Fact Sheet for Health Professionals." ods.od.nih.gov
- NIH Office of Dietary Supplements. "Vitamin A and Carotenoids: Fact Sheet for Health Professionals." ods.od.nih.gov
- U.S. Food and Drug Administration. "The FDA Warns that Biotin May Interfere with Lab Tests: FDA Safety Communication."
- Daily Foundation label: Supplement Facts, other ingredients and suggested use.
