Try loading for five days with 20 grams per day. After that, you only need between 5-10 grams a day to maintain your creatine levels. Really it depends on your bodyweight- if you're over 200, I'd recommend at LEAST 10 grams per day following your loading phase. A lot of people say you just excrete it- but for me, I've seen a huge difference when I up my dosage. And what the hell, for how cheap it is nowadays, you can't lose.