The common practice for taking creatine is to "load" creatine for five to seven days, and then continue to take a "maintenance" amount indefinitely. For example, most supplement manufacturers recommend 20 grams of creatine be taken in five-gram servings for five to seven days followed by five grams per day after that. The idea is that by taking a larger amount of creatine, you can super-saturate the muscle and increase the total creatine pool. Then all you need is a maintenance serving to keep an elevated level of creatine in the muscle. Loading creatine with 20 grams and maintaining with five grams is the most common recommended protocol and the one that has been deemed safe through longer-term studies. (11,12)
Another option for gittin' loaded was presented by Dr. Eric Serrano. Rather than making a "blanket recommendation," Dr. Serrano bases his method on the body weight of the individual taking the creatine:
Week 1
.35g of creatine per kg of bodyweight
Week 2-4
.15g of creatine per kg of bodyweight
Week 5
Off
Although I have no scientific evidence to prove Dr. Serrano's system is better, I believe that using body weight and cycling creatine is more beneficial than the standard 20g-load/5g maintenance protocol. Obviously, a 250-pound muscle-head requires more creatine than a 105-pound bikini model. Another reason I prefer Dr. Serrano's system is that you cycle off and re-load creatine periodically. I can only speak from experience when I say that cycling creatine works better than a simple maintenance of 5g per day. Every time I cycled off, then re-loaded, I noticed an accelerated improvement in performance.