1,112
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ranked #8,625 most helpful
out of 571,544,897 reviews
★☆☆☆☆
Led to a Doctor's Visit
There is no warning on this product to alert you to the possible side-effects. It darkened my daughter's urine and we assumed she had a UTI. This led to a doctor's visit and eventual lab work. These came back indicating that her thyroid levels were low. The provider explained that this is a side effect of biotin. We had no idea. Be very careful with this product. It seems harmless, but it can really cause some issues.
October 2018 · Health and Household · verified purchase