Wellness
It could potentially cause acne, for one.
Whether you’re looking to improve your skin or get thicker hair and nails, biotin is a popular fix. But, like any supplement, biotin can also have a dark side. Below, experts explain the unexpected side effects of taking biotin so you can be aware of whether the ingredient is working against your body instead of for you.
Before putting anything new in your body, it’s helpful to know what it is. Biotin is another name for vitamin B7, and is a crucial ingredient to keep your hair, skin, and nails healthy, says Ashley Southard, CEO of nutraceutical company Mushroom Design. You usually get your biotin naturally through eating foods like nuts, eggs, and whole grains. But you can also opt to get an extra dose of the vitamin in supplement form (studies suggest doses of up to 100 micrograms).
Luckily, the supplement is widely considered safe when taking the proper dosage, according to Dr. Nesochi Okeke-Igbokwe, MD, an internal medicine doctor. Nonetheless, the vitamin can also come with some unwanted side effects — so, when in doubt, consult with a physician before beginning your regimen. To help you understand if your supplement is causing you trouble, experts share six unexpected side effects of biotin.
4
Skewed Lab Results
Depending on your dosage, high levels of biotin may cause false-positives or false-negatives for different lab tests, says Southard, like thyroid hormone tests. And if your lab results are incorrect, it could contribute to a misdiagnosis, adds Okeke-Igbokwe. To avoid a lab work snafu, she says to tell your doctor about every medication and supplement you’re taking when you get blood drawn.
Your doctor may even recommend that you stop taking the vitamin for a while before having any lab tests done to make sure your results are accurate. Check in with your doctor if you have upcoming tests to see when they recommend you stop your daily dose.
5
Upset Stomach
Taking biotin may also wreak havoc on your digestive system: biotin side effects can include stomach troubles like nausea, cramping, and diarrhea, according to Elliott. If you’re having tummy issues whenever you take the supplement, it may be best to ditch your dose to keep your digestive system healthy.
6
Interactions With Medications
Biotin can cause interactions with medications like anticonvulsants. The end result? It could lower their effectiveness or cause new side effects to pop up, like more stomach problems, says Kingsley. "Any interaction with a medication can potentially be dangerous to a patient, which is why it is very important to discuss all of your medications and supplements with your doctor," she tells Bustle.
Though many people take biotin with no issue, it's still important to talk to your doctor if you're experiencing anything out of the ordinary. That way they can provide you with safer, alternatives if need be.
Studies referenced:
Ardabilygazir, A. (2018). Effect of High-dose Biotin on Thyroid Function Tests: Case Report and Literature Review. Cureus, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6103391/
Bistas, K. (2021). Biotin. StatPearls, https://www.ncbi.nlm.nih.gov/books/NBK554493/
Cascorbi, I. (2012). Drug Interactions—Principles, Examples and Clinical Consequences. Deutsches Ärzteblatt international, https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3444856/
Yang, M. (2014). A randomized, double-blind, placebo-controlled study of a novel pantothenic Acid-based dietary supplement in subjects with mild to moderate facial acne. Dermatology and Therapy, https://pubmed.ncbi.nlm.nih.gov/24831048/
Experts:
Tania Elliott, MD, an allergy and immunology specialist at NYU Langone Health
Yoram Harth, MD, a board-certified dermatologist and medical director of MDacne
Melanie Kingsley, MD, dermatologist at Indiana University Health
Nesochi Okeke-Igbokwe, MD, MS, an internal medicine physician based in New York City
Ashley Southard, CEO of nutraceutical company Mushroom Design
This post was originally published on May 25, 2018. It was updated on June 18, 2019. Additional reporting by Syeda Saad.
This article was originally published on