Supplements · 7 min read
Creatine, clearly: what the evidence actually supports
Creatine monohydrate is one of the most studied sports supplements available. Its strongest evidence is for improving repeated high-intensity performance and supporting gains in strength and lean mass when paired with resistance training—not for replacing training, protein, or a balanced diet.
What creatine does
Creatine increases muscle phosphocreatine stores. This helps regenerate adenosine triphosphate during short, demanding efforts such as sprinting and resistance training, where energy must be supplied quickly.
The practical effect is usually modest but meaningful: an extra repetition, slightly better repeated-sprint output, or a little more training volume. Over time, that additional quality can support greater strength and lean-mass gains.
A simple dose is enough
A loading phase of about 20 grams daily, divided into four doses for five to seven days, saturates muscle quickly. It is optional. Taking 3–5 grams daily reaches a similar level more gradually and is simpler for most people.
Timing is far less important than consistency. Creatine monohydrate is the form with the deepest evidence base; more expensive forms have not shown a dependable advantage.
Weight gain is usually water inside the muscle
An early increase on the scale is common because creatine draws water into muscle cells. This is not body-fat gain. The amount varies, but athletes in weight-category or aesthetic sports should test creatine well before competition rather than introducing it at the last minute.
Taking creatine with a meal and avoiding a large single loading dose may reduce stomach discomfort in people who are sensitive to it.
Safety still needs individual context
Position stands and controlled trials report good safety in healthy people at recommended doses. Creatinine on a blood test may rise because it is a breakdown product of creatine; that change does not automatically mean kidney damage, but it should be interpreted by a clinician.
People with kidney disease, pregnancy, complex medical conditions, or medicines affecting kidney function should obtain individual medical advice before supplementing. Choose a reputable, independently tested product because supplement quality is not uniform.
Sources
Where this information comes from
Peer-reviewed clinical studies, position stands and consensus statements.
- 01Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18. View study
- 02Chilibeck PD, et al. Effect of creatine supplementation during resistance training on lean tissue mass and muscular strength in older adults: a meta-analysis. Open Access J Sports Med. 2017;8:213–226. View study
- 03Branch JD. Effect of creatine supplementation on body composition and performance: a meta-analysis. Int J Sport Nutr Exerc Metab. 2003;13(2):198–226. View study
This article is general information, not individual medical advice. For a plan matched to your health history, book a consultation.
