Creatine monohydrate is one of the most studied supplements in sports nutrition, and for combat sports athletes, the case for using it is becoming harder to ignore, though the full picture has some important nuance worth understanding. Let’s take a look at recent studies to figure out if MMA athletes should be taking creatine.
Whether you’re drilling takedowns, sparring, or deep into a training camp, the right supplement stack sits at the top of the list of best tools for personal development for any serious MMA athlete. Health and fitness in combat sports goes beyond lifting heavy and eating clean. Creatine monohydrate has been sitting in the background of sports nutrition for decades, but a growing body of research specific to combat sports is making a fresh argument for why fighters should be paying closer attention to it.
Creatine and MMA: The Research Every Fighter Should Know
MMA is an intermittent high-intensity sport, placing simultaneous demands on explosive power, strength endurance, reaction time, and cognitive sharpness. That combination makes the sport an interesting test case for creatine, which primarily works by expanding intramuscular phosphocreatine stores, amplifying the body’s capacity to regenerate adenosine triphosphate during short, intense bursts of activity.
A 2020 systematic review published in the Journal of Dietary Supplements, covering 19 studies across combat sports including wrestling, judo, taekwondo, and boxing, found that creatine supplementation significantly improved muscular power and maximal strength outcomes, particularly in protocols built around short-duration, high-intensity exercise. That maps directly onto the kind of work that defines an MMA exchange: a wrestling shot, a punching combination, a scramble from the bottom position.
A 2021 review published in Nutrients by researchers from Mississippi State University, among others, noted that across the existing literature, performance improvements of 10–15% are typically observed with creatine supplementation, with 5–15% gains in maximal power, anaerobic capacity, and repetitive sprint performance. Combat sports, including MMA, wrestling, and boxing, appear explicitly in that review’s list of activities likely to benefit from creatine.
The Weight Class Problem
The sticking point for any fighter reading this is the number on the scale. Creatine supplementation typically adds 1–2 kg of body mass during the first week of a loading protocol, attributable to increased intracellular water retention as creatine draws water into muscle cells. For athletes managing a weight cut, that creates a real logistical issue.
However, the 2025 review in the Journal of Dietary Supplements observed that fat-free mass increases associated with creatine do not appear to impair rapid weight-cutting strategies, and that the associated water weight can be effectively managed during acute weight loss phases. A practical approach used by some fight nutritionists involves a washout period, gradually reducing or stopping creatine intake in the final week before a weigh-in, to shed that retained water before stepping on the scale.
There is also an argument that resuming creatine immediately after weigh-ins actively speeds up recovery. A narrative review specifically focused on MMA, published in the Journal of Exercise and Nutrition, highlighted creatine’s role in rehydration in the hours between the weigh-in and fight time. Research found that combining creatine with carbohydrate intake augments muscle glycogen supercompensation within the first 24 hours of recovery following exhaustive exercise, a window that mirrors what fighters experience overnight before their bout.
The Cognitive Angle
MMA demands more than physical output. Decision-making under fatigue, reaction time, and spatial awareness under pressure are all part of the sport. There is growing research interest in creatine’s effects on the brain, where it may help maintain energy stability during cognitive stress and physical impact. A study cited by the NSCA reported small but measurable improvements in visual reaction time and cognitive processing in female Muay Thai fighters following creatine supplementation after exhaustive exercise.
For MMA athletes specifically, the research supports using creatine during training camps to build strength and power, strategically pausing or tapering before weigh-ins to manage water weight, and reintroducing it post-weigh-in to accelerate glycogen loading and rehydration before fight time.
