Do I need creatine?
No supplement is required for progress, but creatine is one of the best-supported options for strength, power, repeated high-intensity work, and lean-mass gain when paired with training. It is not a steroid, stimulant, hormone, or shortcut. It helps your muscles regenerate ATP more effectively during short, intense efforts, which can support better training output over time.
The simplest protocol is 3-5 grams of creatine monohydrate per day. Loading is optional: Taking ~20 grams per day for several days when first starting can saturate muscle stores faster, but it is not necessary. If you take a normal daily dose consistently, you will still saturate stores over time. Timing is much less important than consistency, so take it whenever you are most likely to remember it. Taking it with a meal may be easier on digestion.
Early scale increases are common because muscle stores more water as creatine stores rise. That is not fat gain. For most people, this is a neutral or even desirable effect because it reflects fuller muscle creatine stores and intracellular water. It matters mainly if you are making weight for a sport, tracking scale weight very tightly, or prone to overreacting to normal short-term scale movement.
Creatine can raise blood creatinine, which can look concerning on basic kidney-function labs because creatinine is used as a marker of kidney filtration. That does not automatically mean creatine is damaging your kidneys. It may simply reflect higher creatine intake, more muscle mass, or higher creatine turnover. For athletes, bodybuilders, and people supplementing with creatine, it can be useful to discuss cystatin C or a creatinine-cystatin C eGFR calculation with a clinician, because cystatin C is often less affected by muscle mass and creatine intake than creatinine alone. The National Kidney Foundation notes that cystatin C may be useful when creatinine is less reliable, including in people with extremes of muscle mass such as bodybuilders.
Still, do not interpret kidney labs on your own. If you have kidney disease, abnormal kidney labs, take medications that affect kidney function, are pregnant, or have a medical condition that makes supplementation higher-stakes, ask a clinician before using it and make sure they know you take creatine.
The practical downside profile is usually modest: possible water-weight gain, occasional gastrointestinal discomfort at higher doses, cost, and the need to take it consistently. Stick with creatine monohydrate rather than paying extra for exotic forms, unless you have a specific reason. For most healthy lifters, the boring version, 3-5 grams of creatine monohydrate daily, is the one that works.