When taken at high doses, excess B vitamins are typically flushed out via your urine. Note that high doses of biotin don’t appear to pose a risk of toxicity, although they may interfere with lab testing. This supplement contains 20,000% of the DV for biotin per two-tablet serving, along with a number of other active ingredients to support hair, skin, and nail health, such as silica, collagen, zinc, and coenzyme Q10 (CoQ10) ( 4, 6, 7, 8). The ingredients and products undergo rigorous testing by a number of third-party labs, such as Silliker, Eurofins, Covance, and Advance Laboratories. Pure Encapsulations is a trusted supplement brand among healthcare professionals.

Dose: 2 capsules provide 20,000% of the DV.