primo is def the way to go. It's very safe on your body, and its more of cutter than you think, so it def will keep you lean. I would def take anywhere from 300 mg to 600 mg a week to get the tru affect of primo. I think you might need another bottle ...20 ml prob wont be enough. I have gotten results off of 200 mgs a week but you wasting a little of your money in a way. Primo is pretty pricey so i guess it depends on your pockets. hope i can help