I finally convinced my dad to buy it recently. I have slightly oily skin, it gets pretty annoying. I've been taking 3 grams a day, which is six pills. If you have more oily skin than me, the suggested dose is 5 grams, then 10 after you see an effect, then back to 5 grams once more. BE WARNED: It will dry out your hair, sometimes even making it fall out. Don't take biotin it will only cause the acne to return, use a special shampoo with oil in it.