In elite sport, where the difference between victory and defeat can come down to milliseconds, centimetres or a single repetition, athletes are increasingly turning to evidence-based nutritional supplements to gain small but potentially decisive advantages.

Dietary supplements are widely used among competitive athletes, although the exact prevalence varies considerably by sport and study. Research reviews suggest that elite athletes generally use supplements more frequently than non-elite competitors, with performance, recovery and nutritional support among the main reasons.

Among the supplements that have attracted significant scientific attention is creatine monohydrate, a naturally occurring compound found in foods such as meat and seafood and produced by the human body.

Creatine is stored in muscles largely in the form of phosphocreatine, where it helps regenerate adenosine triphosphate (ATP), the body’s immediate energy source for short, high-intensity activities.

By increasing muscle creatine stores, supplementation can improve the ability to repeatedly perform explosive movements such as sprinting, jumping, resistance training and other forms of high-intensity exercise. Research has consistently found benefits particularly for strength and power-based activities.

Creatine is also among the most widely studied sports supplements, and unlike many products marketed to athletes, its performance effects have been investigated across numerous controlled studies.

For elite competitors, supplementation is often part of a broader strategy rather than a substitute for training and proper nutrition.

Athletes competing at the highest level face demanding training schedules, frequent travel and tightly packed competition calendars. Supplements may therefore be used to help meet nutritional requirements, support training adaptations or provide targeted performance benefits.

A systematic review of sports supplementation found that supplement use is widespread among athletes, although the evidence and effectiveness vary significantly depending on the product and sport.

Creatine has particularly strong relevance for athletes whose sports require repeated bursts of high-intensity effort. A recent review involving combat-sport athletes, for example, found improvements in muscular strength and power, although it also noted increases in body mass and found no clear effect on sport-specific endurance, fatigue or recovery.

Sports nutrition experts caution that supplements should not be viewed as shortcuts to elite performance.

A balanced diet remains the foundation of athletic preparation, with athletes requiring adequate energy, protein, carbohydrates, fats, vitamins and minerals to support demanding training programmes.

Creatine can complement that foundation, but it cannot compensate for inadequate sleep, poor nutrition, insufficient training or ineffective recovery strategies.

Creatine monohydrate is commonly taken consistently rather than only immediately before exercise. Research and sports-nutrition guidance have extensively examined daily supplementation, with maintenance intakes commonly falling around 3–5 grams per day.

The supplement is not prohibited by major sporting organisations and has a substantial safety record when used appropriately. However, athletes competing under anti-doping regulations must be cautious about the quality of all supplements because contaminated products can contain undeclared prohibited substances.

Creatine can also cause an increase in body mass, largely because of increased water stored within muscle. That may be beneficial for some strength and power athletes but could be undesirable for competitors in weight-class sports.

The growing use of creatine among athletes reflects a broader transformation in professional sport, where nutrition, recovery and sports science have become increasingly important components of preparation.

For elite competitors, the objective is rarely to find one product capable of transforming performance. Instead, the focus is on accumulating small, evidence-backed advantages through training, nutrition, recovery, medical support and carefully selected supplementation.

Creatine’s popularity is therefore less about a “magic” performance boost and more about its unusually strong body of scientific evidence compared with many other products marketed to athletes.