I’m the type of person who hardly ever breaks out with the exception of a few pimples here and there after my period. About a month after taking these, my skin began to break out like crazy, more than it had ever before. I was so confused as to why I had such terrible acne all of a sudden. A few weeks and many pimples later, I started to research. I found out that biotin is naturally made in the body and excess biotin causes acne, which made so much sense, considering there’s 2,500mcg per 2 gummies. As soon as I stopped taking them, my skin cleared up. During the time I took them, I noticed no changes in my hair or nails. Maybe it depends on who you are because I noticed this product has so many good reviews, but it definitely didn’t work for me.