Popular hair and nail vitamin may skew your blood work
NCT ID NCT07302880
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study looks at how taking biotin (vitamin B7) supplements can interfere with certain blood tests. Researchers will give 24 healthy adults either a single dose of biotin (10 mg or 100 mg) or a placebo, then take blood samples over several hours to see how test results change. The goal is to understand when the interference is strongest and how long it lasts.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- Active substance
- biotin (vitamin B7)
- What this could lead to
- If successful, this could help doctors know how long to wait after taking biotin before getting accurate blood test results.
- What could go wrong
- This is a small, early study with only 24 healthy participants, so findings may not apply to everyone or to all types of blood tests.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Department of Clinical Biochemistry, Bispebjerg University Hospital, Copenhagen
RECRUITINGCopenhagen, Denmark