Can biotin make acne worse? You may have heard many beauty influencers insist on a link between biotin and breakouts, but new research suggests that there is minimal evidence that supports the claim that taking biotin supplements will worsen acne.
What are the side effects of biotin 1000 mcg? Possible Side Effects Biotin supplements can cause problems if you take too much. Side effects can include skin rashes, digestive upset, problems with insulin release, and kidney problems. As with any supplement, the safety of long-term or high-dose use isn’t known.