Biotin Intake Calculator
Biotin mcg from food and pills against RDA.
What it does
Biotin runs carboxylases on micrograms a day: 30 for adults with eggs and nuts covering halves. Pills dose thousands while labs wobble under megadoses.
The tool above takes egg and nut servings with pill mcg by life stage. It returns total mcg, the RDA share, and the safety note.
The default adult with egg plus nuts totals 15 mcg, or 50% of RDA. Zeros read flat while a 5,000 mcg pill reads 16,667% with no UL set.
Supplement guidance fixes the 30/30/35 ladder without an upper limit. Federal labeling repeats 30 mcg as the Daily Value behind panels.
Beauty marketing oversells what trials support: biotin rescues deficiency, not ordinary hair. Pause megadoses before thyroid and heart labs that they skew.
How to use
- Pick the life stage.
- Type egg servings.
- Type nut servings.
- Type supplement mcg.
- Read total first.
- Read share and safety beside it.
Formula
- eggs
- Egg servings near 10 each.
- nuts
- Nut servings near 5 each.
- RDA
- 30 adult, 30/35.
NIH Office of Dietary Supplements sets adult RDA at 30 mcg with 30 pregnancy and 35 lactation, and no upper limit. Federal Daily Value rules list 30 mcg for labeling. Food factors are planning estimates; pills read exact from labels.
Worked example
Example: eggs plus nuts
Defaults: adult, 1 egg, 1 nuts.
- Eater: adult, 1 egg, 1 nuts serving.
- Eggs: 1 x 10 = 10 mcg.
- Nuts: 1 x 5 = 5 mcg.
- Total: 10 + 5 = 15 mcg.
- Share: 15 / 30 = 50% of RDA.
- Tool shows 15 mcg, 50% of RDA, No UL set.
Reference table
| Group | RDA | UL |
|---|---|---|
| Adults | 30 | None set |
| Pregnancy | 30 | None set |
| Lactating | 35 | None set |
| Pills | Label | Pause for labs |
Limits
- Estimates; foods vary.
- Avidin raw egg caveat.
- Not a deficiency diagnosis.
- Labels beat planning factors.
Common mistakes
- Trusting beauty claims.
- Ignoring lab interference.
- Eating raw whites daily.
- Megadosing without reason.
- Skipping clinician workups.
Try it yourself
Quick checks. Answers sit tucked under each question.
Zeros across?
0 mcg, 0% of RDA, no UL set but far under goal.
5,000 mcg pill only?
5,000 mcg, 16,667% of RDA, no UL set.
Pill 999,999 mcg?
Past 100,000 mcg pills exceed entry bounds: read the label and retry.
Questions
How much daily?
30 adults and pregnancy, 35 lactating mcg. No upper limit is set.
Sources counted?
Eggs near 10 each, nuts near 5 a serving, pills exact.
Beauty vitamin?
Hair, skin, and nail claims outrun trial proof. Biotin fixes deficiency, not vanity.
Lab interference?
Yes, megadoses skew thyroid and troponin labs. Pause pills before bloodwork.
Diagnose deficiency?
No, this estimates intake. Rashes and hair loss need clinicians.
Raw eggs?
Yes, raw whites bind it while cooking frees it. Eat eggs cooked.
Sources
- NIH Office of Dietary Supplements: biotin fact sheet
- 21 CFR 101.36: Daily Value 30 mcg (Cornell LII)