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Ways Biotin Can Skew Test Results

Ways Biotin Can Skew Test Results

Bio-fuel, biotin supplements and biosphere: Which “bio” does the Food and Drug Administration (FDA) recommend you avoid if you want to get a proper reading on a specific heart enzyme, or thyroid hormone test? The answer is vitamin B7, also known as the water-soluble vitamin biotin. It’s found in dietary supplements used for hair, skin and nail growth, as well as multi- and some prenatal vitamins.

The FDA wants you to know that too much biotin in your system can result in a falsely low result on a blood test for troponin, a clinical biomarker that helps in diagnosis of a heart attack. And according to other studies, high doses of biotin can skew lab test results for thyroid hormones, which can lead to an over-diagnosis of Graves’ disease or hyperthyroidism.

The FDA says 30mcg a day of biotin is Adequate Intake for adults and essential for good health of the skin, nails and the liver. Biotin deficiency is rare in healthy people. Women who are breastfeeding need to take supplements (ask your doc) to assure proper fetal development and infant health. For most people, if you have two to three daily servings of 100 percent whole grains, eat plenty of nuts like walnuts, pecans and almonds, and have at least a couple of servings of wild salmon and ocean trout every week, you don’t need biotin supplements. However, if you’re taking antibiotics or meds for epilepsy, ask your doctor if a supplement is a good idea.

Medically reviewed in February 2020.

Who should use biotin?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
Individuals with a biotin deficiency should take biotin supplementation under their doctor's dir...
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How should I take biotin?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
You should take bioyin exactly as directed by your doctor. The dose of biotin will depend on age...
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What foods are good sources of biotin?
Dole Nutrition InstituteDole Nutrition Institute
The following foods are rich in biotin:• Liver• Cooked eggs• Wild salmon• Avocado• Whole wheat bread...
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What are the side effects of Nail-ex?
Stacy Wiegman, PharmDStacy Wiegman, PharmD
It's rare to experience side effects from Nail-ex or other biotin supplements. There have been occas...
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