Biotin, rare allergy and lab test interference
What it found
Biotin seems to cause allergic reactions very rarely, but it can interfere with some allergy blood tests.
In mice, low biotin made nickel allergy worse, and in children, higher blood biotin was weakly linked to some allergies.
What they found
Studies in people
Rare allergy cases
Only two cases of hypersensitivity to biotin or its precursors have been published. Both were in workers exposed on the job, not from taking supplements or using cosmetics.
Biotin and allergy in children
In 411 Japanese schoolchildren aged 6 to 12, higher blood biotin was weakly linked to higher total IgE and specific IgE for cedar pollen, cat allergens and egg white. The link was strongest in children with cedar pollinosis.
Animal and lab studies
Biotin deficiency in mice
Mice fed a low-biotin diet for 8 weeks developed more contact hypersensitivity to nickel than mice on a normal diet. Ear swelling was greater and lasted longer. Giving biotin reduced the swelling.
Other findings
Lab test interference
Biotin supplements can interfere with some immunochemical tests that use biotin-streptavidin binding, leading to false positive or false negative results. This can affect total and specific IgE tests on certain platforms.
Stopping before tests
To avoid interference, patients should stop taking biotin at least 48 hours before blood is drawn. Longer times are recommended for higher doses: 8 hours for 10 mg/day, 3 days for 100-300 mg/day, and 7 days for children taking 2 and 15 mg/kg/day.
What the authors conclude
“The small amount of available data does not allow for unequivocal conclusions in this area.”
Also in their conclusions
- They say that hypersensitivity to biotin is not a significant problem despite common use, but both deficiency and excess may harm immune function.
- They advise that patients stop biotin supplements at least 48 hours before allergy blood tests or choose a method free from biotin interference.
- They call for more research on biotin's role in immune modulation and hypersensitivity.
How it was done
The authors wanted to understand whether biotin supplements, cosmetics and medicines can cause allergic reactions or make people more sensitive to other allergens. They also looked at how biotin can interfere with allergy blood tests.
They reviewed published case reports, animal experiments, a study in 411 Japanese schoolchildren, and laboratory methods. They also examined how biotin is used in immunochemical tests and how to avoid interference.
What it can’t tell you
- The animal and cell studies cannot show what happens in people.
- The study in children can show a link between blood biotin and allergies, but not whether biotin causes them.
- There is not enough data to draw firm conclusions about biotin and immune function.
Who paid
- Conflicts
- The author declares no conflict of interest.
- Authors work at
- Nicolaus Copernicus University in Torun, Poland
The paper
- Title
- Biotin Supplementation-The Cause of Hypersensitivity and Significant Interference in Allergy Diagnostics
- Type
- ReviewThe authors read earlier studies and describe what they found. It isn’t a new study.
- Evidence
- Studies in people · animals · lab
- Summarised from
- Full text
- Cite
- Lis K (2025). Biotin Supplementation-The Cause of Hypersensitivity and Significant Interference in Allergy Diagnostics. Nutrients. doi:10.3390/nu17152423Free full textPubMed 40806008DOI
Summary written 26 Sep 2026. Check it against the paper before it changes what you eat. How we summarise papers · Report an error