Kevacke... It wasn't me First of all, biotin and acne are not actually related, but they are misinterpreted. There are not many more acne in people who take biotin than in people who don't actually take it, but acne itself is such a common symptom and it is misknown as a side effect of excessive biotin intake, so people say it a lot.
Second, when you consume much more biotin than you can eat as a food, you can really get acne due to a mechanism you don't know yet. However, it may be a side effect that does not usually occur with the amount taken as food.
I haven't found an academic paper on this context, and I've found one of the following explanations, but honestly believe it or not (the fact that biotin, vitamin B7, inhibits vitamin B5 action and causes acne). That's what he said. The source is a doctor's blog
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