Vitamin B12 Daily Value: 2.4 mcg
The FDA Daily Value for vitamin B12 is 2.4 mcg for adults and children 4+.
Key facts
- Adults & children 4+
- 2.4 mcg
- Ages 1–3
- 0.9 mcg
- Pregnant/lactating
- 2.8 mcg
- Infants
- 0.5 mcg
- On labels until 2020/2021
- 6 mcg · decreased Source (opens in a new tab)
- Label rounding
- Regulation: in mcg, to the precision of the Daily Value; more decimals allowed for small amounts; under 2% DV may show 0% FDA guidance (nonbinding): nearest 0.01 mcg
- 20% DV (high)
- 0.48 mcg
Common amounts of vitamin B12
Per serving, adults and children 4+.
- 0.1 mcg is 4%
- 0.2 mcg is 8%
- 1 mcg is 40%
- 2 mcg is 80%
Vitamin B12 Daily Value: 0.9 mcg
The FDA Daily Value for vitamin B12 is 0.9 mcg for children 1–3 years.
- Adults & children 4+
- 2.4 mcg
- Ages 1–3
- 0.9 mcg
- Pregnant/lactating
- 2.8 mcg
- Infants
- 0.5 mcg
- Label rounding
- Regulation: in mcg, to the precision of the Daily Value; more decimals allowed for small amounts; under 2% DV may show 0%
- 20% DV (high)
- 0.18 mcg
Per serving, children 1–3 years.
- 0.05 mcg is 6%
- 0.1 mcg is 10%
- 0.5 mcg is 60%
- 1 mcg is 110%
Vitamin B12 Daily Value: 2.8 mcg
The FDA Daily Value for vitamin B12 is 2.8 mcg for pregnant and lactating women.
- Adults & children 4+
- 2.4 mcg
- Ages 1–3
- 0.9 mcg
- Pregnant/lactating
- 2.8 mcg
- Infants
- 0.5 mcg
- Label rounding
- Regulation: in mcg, to the precision of the Daily Value; more decimals allowed for small amounts; under 2% DV may show 0%
- 20% DV (high)
- 0.56 mcg
Per serving, pregnant and lactating women.
- 0.1 mcg is 4%
- 0.2 mcg is 8%
- 1 mcg is 35%
- 2 mcg is 70%
Vitamin B12 Daily Value: 0.5 mcg
The FDA Daily Value for vitamin B12 is 0.5 mcg for infants through 12 months.
- Adults & children 4+
- 2.4 mcg
- Ages 1–3
- 0.9 mcg
- Pregnant/lactating
- 2.8 mcg
- Infants
- 0.5 mcg
- Label rounding
- Regulation: in mcg, to the precision of the Daily Value; more decimals allowed for small amounts; under 2% DV may show 0%
- 20% DV (high)
- 0.1 mcg
Per serving, infants through 12 months.
- 0.02 mcg is 4%
- 0.05 mcg is 10%
- 0.2 mcg is 40%
- 0.5 mcg is 100%
Questions about vitamin B12
What is the FDA Daily Value for vitamin B12?
The FDA Daily Value for vitamin B12 is 2.4 mcg for adults and children 4 years and older. On a Nutrition Facts label, a serving's %DV for vitamin B12 is its amount divided by 2.4 mcg, times 100.
How do I work out the %DV for vitamin B12?
Divide the amount in one serving by 2.4 mcg and multiply by 100. Then round to the nearest 2% up to 10%, to the nearest 5% above 10% and up to 50%, and to the nearest 10% above 50%. For example, 0.48 mcg ÷ 2.4 mcg × 100 = 20%.
How are vitamin and mineral %DV values rounded?
The percentages for vitamins and minerals shall be expressed to the nearest 2-percent increment up to and including the 10-percent level, the nearest 5-percent increment above 10 percent and up to and including the 50-percent level, and the nearest 10-percent increment above the 50-percent level.
Vitamin B12 rounding rules
Amount
Vitamin B12 is declared to the nearest 0.01mcg. Measuring finer than that changes nothing on the label.
| Amount range | Rounding rule |
|---|---|
| ≥0 | nearest 0.01 mcg |
These mcg increments come from FDA guidance, banded by this group's Daily Value.
% Daily Value
| %DV range | Rounding rule |
|---|---|
| 0 to 10% DV | Nearest 2% |
| >10 to 50% DV | Nearest 5% |
| >50% DV | Nearest 10% |
Every %DV a label can show
What a serving has to contain for a label to print each figure. The %DV is worked out from the actual amount, before that amount is rounded.
| If the label shows | The serving must contain |
|---|---|
| Nearest 2%0 to 10% DV | |
| 0% DV | 0 mcg≤ amount <0.024 mcg |
| 2% DV | 0.024 mcg≤ amount <0.072 mcg |
| 4% DV | 0.072 mcg≤ amount <0.12 mcg |
| 6% DV | 0.12 mcg≤ amount <0.168 mcg |
| 8% DV | 0.168 mcg≤ amount <0.216 mcg |
| 10% DV | 0.216 mcg≤ amount <0.3 mcg |
| Nearest 5%>10 to 50% DV | |
| 15% DV | 0.3 mcg≤ amount <0.42 mcg |
| 20% DV | 0.42 mcg≤ amount <0.54 mcg |
| 25% DV | 0.54 mcg≤ amount <0.66 mcg |
| 30% DV | 0.66 mcg≤ amount <0.78 mcg |
| 35% DV | 0.78 mcg≤ amount <0.9 mcg |
| 40% DV | 0.9 mcg≤ amount <1.02 mcg |
| 45% DV | 1.02 mcg≤ amount <1.14 mcg |
| 50% DV | 1.14 mcg≤ amount <1.32 mcg |
| Nearest 10%>50% DV | |
| 60% DV | 1.32 mcg≤ amount <1.56 mcg |
| 70% DV | 1.56 mcg≤ amount <1.8 mcg |
| 80% DV | 1.8 mcg≤ amount <2.04 mcg |
| 90% DV | 2.04 mcg≤ amount <2.28 mcg |
| 100% DV | 2.28 mcg≤ amount <2.52 mcg |
The rules are FDA's; the inversion is ours. Ranges are inclusive at the low end and exclusive at the high end, because an exact half rounds up.
Does the vitamin B12 Daily Value change for children or pregnancy?
Yes. It is 0.9 mcg for children 1 to 3 years, is 2.8 mcg during pregnancy and lactation and is 0.5 mcg for infants through 12 months.
How do I find out how much vitamin B12 is in a food?
A Daily Value is a reference target, not a measurement of any particular food. To find the vitamin B12 content of a specific ingredient or product, look it up in USDA FoodData Central, then use that amount here to see what a label would declare and what %DV it carries.
Where do these numbers come from?
- Daily Values and label rounding: FDA, 21 CFR 101.9, as of 2026-02-12.
- Vitamin B12 Daily Value: 21 CFR 101.9(c)(8)(iv).
- Vitamin B12 label rounding: 21 CFR 101.9(c)(8)(iii).
- %DV rounding: 21 CFR 101.9(c)(8)(iii).
- Old Daily Values: 21 CFR 101.9, April 1, 2016 edition.
- 5% low and 20% high: FDA's consumer page on the lows and highs of %DV.
- Dataset: bm-regulatory US Nutrition Label Rules v17.0.0.
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