Biotin is vitamin B7, sold as tablets, capsules and gummies, often in strengths of several thousand micrograms. Compare micrograms per serving. Biotin can affect some laboratory blood tests, so tell your doctor you take it before a blood test.
Browse more single vitamins.
Biotin: questions
Should I stop biotin before a blood test?
Tell your doctor or lab that you take it, because high doses of biotin can affect some test results.