The more creatine you take, the better.
You've seen those sick bodybuilders chugging down 10-20 grams of creatine. Is it worth it? According to scientists at St. Francis Xavier University in Nova Scotia, at 0.1 grams per kilogram of bodyweight, male athletes excreted 46% of the ingested creatine within 24 hours. For a 220 pound lifter, this means that if he consumes 10g of creatine, 46%, or 4.6g of creatine, is wasted. In another study performed at the Human Performance Laboratory at Ball State University, scientists confirmed that lower doses of creatine monohydrate (5g/day) are effective, and that results can even be achieved without a loading phase.