Biotin is one of many B vitamins. It isalso called vitamin B7, vitamin H or coenzyme R

Biotin is found in a wide range of foods,including brewer’s yeast, soybeans,green peas, carrots, cauliflowers, bananas, liver, butter and salmon.

The recommended normal dietary intake is about 30 – 100 mcg (microgram, μg)per day.

• High-dose biotin supplements inmilligram (mg) concentrations, such as5 to 10 mg (equivalent to 5,000 to10,000 mcg) are advertised as over-the-counter lifestyle supplement for hair, skin and nail health.
• These are more than 100 times the recommended normal dietary intake. These types of high-dose biotinsupplements can cause wrong results for certain laboratory tests.
• you take biotin, please discuss withyour doctor
• you have taken biotin before the blood work, tell the lab when the last dose was taken and what the dose was

• Health Canada Monograph: Biotin  (last accessed 2018.02.14)S.
• Food & Drug Administration (FDA) Safety Communication: The FDA Warns that Biotin May Interfere with Lab Tests (last accessed 2018.02.14)
• Biotin Facts (by Roche Diagnostics) (last accessed 2018.02.14)