Two weeks ago I purchased Nature's Bounty Hair, Skin, and Nails vitamins with biotin. I saw mostly positive reviews on Amazon regarding the healthy hair and nails portion, but I was very upset to discover that it caused my skin to break out terribly. Usually my skin is pretty clear with a little blemish every now and then, but right after I started taking these, new pimples were popping up in places I usually don't break out, like forehead and cheeks, which usually means it's not hormonal (hormonal acne is usually in the chin area). And they were bad pimples, the ones that stay red on your face for like a week. Two of the really bad ones are still on my face! It's so embarrassing. I can't even remember the last time I had a really bad zit that wouldn't go away... I really thought I was done with my old blemish cover-up that got its last use years ago in my greasy college days.
Anyway, I know this product is probably great for a lot of people, but it's definitely not for everyone. I did some research on why my skin was breaking out and read that there is something in the vitamins that work to turnover skin cells quicker so that you get a healthy glow, but that sometimes (for people like me), it causes pores to get clogged up and breakouts to happen. It just wasn't for me, and I'm quitting the vitamins today. I hated that I wasted a good chunk of money on them and had to face a couple of holiday parties already looking like a 16 year old, but hey, lesson learned. Glad I didn't start taking these a month before my wedding.