I have normal skin, I'm not acne prone. I started taking biotin supplements and then hair/nail growth supplements with a large amount of biotin and had no adverse reactions for about 3 months.
And then all holy h*ll broke out on my face! Even though I immediately stopped taking the supplements I went through the worst bout of acne I've ever had for a little over 6 months. At any given time I could point out 3 large pimples on my forehead. One would heal and another popped up. I tried every product on the market and nothing helped until I started using Proactive (that stuff worked like a charm, too bad it took so long to buy it).
I guess it took a long time for it to get out of my system because it has taken about a year for my skin to go back to normal and I have just recently stopped using Proactive and successfully went back to CeraVe. Now just the ocassional aunt flo blemish.
It does seem to be a fairly common side effect from what I've heard/read, which is why I've never gotten into taking any sort of supplement with Biotin in it. I would love to try Biotin since the benefits sound great, but I'm afraid my oily skin might break out from it.
Yeah it was really bizzare. It's like my skin tolerated it (3 pills per day) for about 3 months and I guess that's when it really got built up in my system and then BAM, serious adult acne. It has never, ever happened to me before so I know it was the pills. I just can't believe how long it took to go back to normal!
AND I don't know that it even did anything for my hair, although my eyelashes seemed thicker.