What biotin supplement helped with hair, skin & nails but didn’t break you out?

Hi all! Searching for a good biotin supplement that didn’t cause you any acne, breakouts or skin issues- what’s the best mcg to get just enough but not go overboard?

I was originally taking the olly prenatal extra strength supplements for this reason as recommended by a friend but the mcg for biotin being only 25 mg seems so low and I haven’t really noticed an improvement after the first bottle. What helped y’all? TIA for answers