Creatine has long been known as the go-to supplement for athletes and bodybuilders, celebrated for its ability to build muscle and strengthen bones. But as the global population ages and the quest to maintain not only strength but also mental clarity grows urgent, scientists have begun to ask a different question: could creatine help the brain as well as the body?
A new systematic review published in Nutrition Reviews suggests that the answer may be yes - though with caution. The research team, led by Samantha Marshall and colleagues, examined all available studies focusing specifically on creatine and cognition in adults over 55. Their conclusion: the evidence, while limited, points toward potential cognitive benefits, especially in the realms of memory and attention.
Why cognition matters as we age
The proportion of people over 60 is set to nearly double by 2050, bringing with it a rising tide of age-related challenges. Muscle mass declines, bone density weakens, and cognitive abilities like memory, attention, and executive function also fade. By age 70, nearly two-thirds of Americans experience some form of cognitive impairment. Preventing or slowing this decline is not just a matter of quality of life, but also of global healthcare sustainability.
While resistance training is already proven to help both muscle and brain, few older adults meet the recommended activity levels. That's where dietary interventions - and creatine in particular - could play a role. Creatine is naturally found in foods like meat and fish, and the body stores it mainly in muscle, with a smaller but crucial share in the brain. It helps regenerate cellular energy, a process central to both muscle contraction and neural activity. Because creatine levels decline with age, supplementation has been proposed as a way to restore some of that lost capacity.
The evidence so far
The review analyzed six studies with a combined 1,542 participants, most of them healthy, community-dwelling older adults. Two were intervention studies where participants were given creatine monohydrate, while four were cross-sectional studies estimating creatine intake through diet.
Five of the six studies reported a positive link between creatine and cognitive performance. Higher intake or supplementation was associated with improvements in tasks measuring attention, working memory, visuospatial memory, and long-term recall. One study, a 24-week randomized controlled trial, found no effect - a reminder of the field's ongoing uncertainty.
The most encouraging findings came from studies where older adults with higher creatine intake performed better on demanding tasks like the Eriksen Flanker Test, which measures selective attention, or the Corsi Block-Tapping Task, which tests visuospatial memory. Another study found that participants consuming more than 0.95 grams of creatine per day scored higher on general cognitive function tests than those with lower intake.
How might creatine help the brain?
The biological rationale is strong. The brain, like muscle, relies on rapid energy turnover to perform complex tasks. Creatine supports this by helping regenerate adenosine triphosphate (ATP), the fuel of cellular activity. Animal and clinical data suggest that higher brain creatine levels can enhance synaptic plasticity, improve neurotransmitter function, and reduce oxidative stress. In theory, this means sharper cognition and more resilience against age-related decline.
Some researchers even argue that older adults may benefit more than younger individuals. With age, creatine levels in both muscle and brain naturally fall, and older adults may require more energy to complete the same cognitive tasks. Supplementation could help close that gap.
Limits of the evidence
Yet the review also emphasizes how early this line of research still is. Only six studies were identified, and their quality varied: one rated "good," two "fair," and three "poor." Sample sizes were small, and methods inconsistent. For instance, supplementation protocols differed in dosage and duration, and most observational studies relied on dietary recall rather than direct measures of creatine in the body or brain.
The mixed results underscore the need for larger, high-quality trials, especially in clinical populations with mild cognitive impairment. It also remains unclear whether dosing strategies should be adjusted for body weight, or whether creatine works best alone or alongside other interventions like exercise.
A supplement worth watching
For now, the takeaway is one of cautious optimism. Creatine is safe, inexpensive, and widely available. It is already recognized as a powerful tool against muscle loss in aging, and early evidence suggests it may also benefit the brain. But before it can be prescribed as part of a cognitive health strategy, more rigorous science is needed.
As Marshall and colleagues conclude, future studies should directly measure brain creatine levels, explore optimal dosing, and consider lifestyle factors that influence metabolism. Only then will we know if this humble supplement can truly serve as a bridge between muscle and mind in later life.
