Vitamin B6 — FDA Daily Value
The FDA Daily Value for Vitamin B6 is 1.7 mg for adults and children 4 or more years of age — a Reference Daily Intake (RDI), a fixed target not tied to calories. It changes by population group; see the exact numbers below.
A serving with 0.51 mg of vitamin b6 provides 0.51 ÷ 1.7 × 100 = 30% DV (High).
Vitamin B6 rounding rules
Amount
Vitamin B6 is declared to the nearest 0.01mg — measuring finer than that changes nothing on the label.
| Amount range | Rounding rule |
|---|---|
| ≥0 | nearest 0.01mg |
% Daily Value
| %DV range | Rounding rule |
|---|---|
| 0 to 10 | nearest 2% |
| >10 to 50 | nearest 5% |
| >50 | nearest 10% |
How much Vitamin B6 is behind each %DV?
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 mg≤ amount <0.017 mg |
| 2% DV | 0.017 mg≤ amount <0.051 mg |
| 4% DV | 0.051 mg≤ amount <0.085 mg |
| 6% DV | 0.085 mg≤ amount <0.119 mg |
| 8% DV | 0.119 mg≤ amount <0.153 mg |
| 10% DV | 0.153 mg≤ amount <0.2125 mg |
| Nearest 5%>10 to 50% DV | |
| 15% DV | 0.2125 mg≤ amount <0.2975 mg |
| 20% DV | 0.2975 mg≤ amount <0.3825 mg |
| 25% DV | 0.3825 mg≤ amount <0.4675 mg |
| 30% DV | 0.4675 mg≤ amount <0.5525 mg |
| 35% DV | 0.5525 mg≤ amount <0.6375 mg |
| 40% DV | 0.6375 mg≤ amount <0.7225 mg |
| 45% DV | 0.7225 mg≤ amount <0.8075 mg |
| 50% DV | 0.8075 mg≤ amount <0.935 mg |
| Nearest 10%>50% DV | |
| 60% DV | 0.935 mg≤ amount <1.105 mg |
| 70% DV | 1.105 mg≤ amount <1.275 mg |
| 80% DV | 1.275 mg≤ amount <1.445 mg |
| 90% DV | 1.445 mg≤ amount <1.615 mg |
| 100% DV | 1.615 mg≤ amount <1.785 mg |
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.
Doing this math for a real label?
Paste in a recipe. Get the whole Nutrition Facts panel — every %DV calculated automatically, every number shows its work.
Frequently asked questions
Every figure on this page traces to a paragraph of 21 CFR 101.9. These are those paragraphs, in full.
What is the FDA Daily Value for Vitamin B6?
The FDA Daily Value for Vitamin B6 is 1.7 mg for adults and children 4 years and older, per 21 CFR 101.9. On a Nutrition Facts label, a serving's %DV for vitamin b6 is its amount divided by 1.7 mg, times 100.
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.
Note: Amount increments for vitamins and minerals come from FDA Guidance 2018/2019, not from CFR text.
Where do the Daily Values for vitamins and minerals come from?
The following RDIs, nomenclature, and units of measure are established for the following vitamins and minerals which are essential in human nutrition:
Note: The Daily Value itself is listed in the RDI table this paragraph introduces, not restated as prose.
How do I find out how much vitamin b6 is in a food?
A Daily Value is a reference target, not a measurement of any particular food. To find the vitamin b6 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.
Other nutrients
Every nutrient a Nutrition Facts label can carry, with the FDA rounding rules that govern it.
Vitamins & minerals
Macronutrients
Voluntary — no Daily Value
For informational purposes only; verify against § 101.9(c)(8)(iv). · US Nutrition Label Rules v1.3.0 · CFR snapshot 2026-02-12