Is 5000 mcg of biotin safe?
5,000 micrograms of biotin (vitamin B7) has no set upper limit. Adults need an adequate intake of 30 micrograms a day.
General information, not medical advice. Check with a doctor or pharmacist before taking a supplement, especially if you are pregnant or breastfeeding, take any medicine, or are under 18.
In the UK
5,000 micrograms of biotin (vitamin B7) is above the NHS guidance of 900 micrograms (0.9 milligrams) a day from supplements. In the UK, adults need no set amount, as a varied diet gives enough. Doctors sometimes advise more for a set time, so check with yours before taking this much.
The figures
| US (NIH) | UK (NHS) | |
|---|---|---|
| Amount checked | 5,000 mcg | |
| Answer | No upper limit set | Above NHS guidance |
| Compared with | No upper limit has been set for biotin. | 900 micrograms (0.9 milligrams) a day from supplements |
| Share of the limit | No limit to compare | 556% of the limit |
| Adults need | An adequate intake of 30 micrograms a day | No set amount, as a varied diet gives enough |
Good to know
- High-dose biotin can upset some blood test results, so tell your doctor or the lab if you take it.
Quick answers
- Is 5000 mcg of biotin safe?
- 5,000 micrograms of biotin (vitamin B7) has no set upper limit. Adults need an adequate intake of 30 micrograms a day.
- What does the NHS say about 5,000 mcg of biotin (vitamin B7)?
- 5,000 micrograms of biotin (vitamin B7) is above the NHS guidance of 900 micrograms (0.9 milligrams) a day from supplements. In the UK, adults need no set amount, as a varied diet gives enough. Doctors sometimes advise more for a set time, so check with yours before taking this much.
- What is the upper limit for biotin (vitamin B7)?
- US: No upper limit has been set for biotin. UK (NHS): 900 micrograms (0.9 milligrams) a day from supplements.
Sources
- NIH Office of Dietary Supplements fact sheet
https://ods.od.nih.gov/factsheets/Biotin-HealthProfessional/ - NHS vitamins and minerals guidance
https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-b/
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