Vitamin B7 (biotin)
Full ranking Dose tool Products (4,110)
Key facts
Sources: https://ods.od.nih.gov/factsheets/Biotin-HealthProfessional/ · FDA DV 30 mcg (https://www.fda.gov/food/nutrition-facts-label/daily-value-nutrition-and-supplement-facts-labels); pre-2016 DV [300] (https://www.federalregister.gov/documents/2016/05/27/2016-11867/food-labeling-revision-of-the-nutrition-and-supplement-facts-labels); no UL set
Daily dose across products (mcg/day)
Label data from official national databases and brand websites, as declared; not lab-verified.
Common forms
| Form | Products | Median | P5–P95 | Elemental fraction |
|---|---|---|---|---|
| D-biotin | 4128 | 150 mcg | 15 – 5,000 | — |
Common questions
What is the Daily Value for Vitamin B7 (biotin)?
The US FDA Daily Value for adults and children aged 4 and over is 30 mcg. It is a labelling reference, not a personal recommendation. [source]
How much Vitamin B7 (biotin) do products usually contain per day?
As of 2026-11-01, 4,110 products list a comparable daily dose (4,129 dose records; one product can have several). The median is 150 mcg per day, and 90% of records fall between 15 and 5,000 mcg. Figures come from labels and are not lab-tested. [source]
What are the side effects of Vitamin B7 (biotin)?
Biotin has not been shown to cause harm. But biotin above recommended amounts can cause false results in some lab tests, including those for hormones such as thyroid hormone. Tell your doctor you take biotin before blood tests. (Source: NIH ODS) [source]
What happens if you take too much Vitamin B7 (biotin)?
No UL has been set. The main practical risk of high doses is interference with lab tests (see previous answer). (Source: NIH ODS) [source]
Is Vitamin B7 (biotin) safe during pregnancy and breastfeeding?
The recommended amount is 30 mcg a day in pregnancy and 35 mcg while breastfeeding. Pregnant and breastfeeding women are among the groups more likely to get too little. (Source: NIH ODS) [source]
Does Vitamin B7 (biotin) interact with medications or other supplements?
Taking antiseizure drugs for at least a year can significantly lower biotin levels. Biotin can also interfere with some lab tests. (Source: NIH ODS) [source]
Top ranked
| Rank | Brand | Product | Per day | Score |
|---|---|---|---|---|
| 1 | Rexall | Biotin 1000 mcg | 2,000 mcg | 100.0 |
| 2 | Nature's Bounty | Biotin | 1,000 mcg | 97.8 |
| 2 | Vitamin World | Biotin 1000 mcg | 1,000 mcg | 97.8 |
| 2 | CVS Health | Biotin 1000 mcg | 1,000 mcg | 97.8 |
| 2 | CVS Pharmacy | Biotin 1000 mcg | 1,000 mcg | 97.8 |