Creatine Is Known for Building Muscle. Could It Also Help an Aging Brain?

Creatine has spent years with a pretty simple reputation: gym supplement.

But researchers are increasingly interested in something else.

Could creatine also help an aging brain?

The question isn’t as far-fetched as it sounds. Creatine plays an important role in the body’s energy system, helping cells regenerate ATP—the molecule they use for energy. The brain is an energy-hungry organ, so researchers have been investigating whether additional creatine might support cognitive function as we age.

And in 2026, there’s some intriguing evidence.

What have researchers found?

A systematic review published in Nutrition Reviews examined six studies involving 1,542 adults age 55 and older.

Five of the six studies reported a positive relationship between creatine and cognitive performance, particularly in memory and attention.

But there’s an important catch: only two of the studies were double-blind supplementation trials, while four estimated people’s creatine intake from their diets. The researchers rated only one study as having good methodological quality.

Their conclusion was cautious: the evidence suggests creatine may benefit cognition in generally healthy older adults, but better clinical trials are needed.

That’s promising—but it’s not proof.

What about a real-world combination with exercise?

Another 2026 randomized, double-blind trial followed 103 adults averaging about 68 years old.

Participants completed resistance training three times a week and received either creatine or placebo. The creatine groups took 3 grams per day.

The researchers found additional improvements in some measures of strength and physical function, along with changes in several biological markers related to inflammation and oxidative stress.

But here’s an important distinction:

The study did not establish that creatine alone improves cognition.

Both the exercise and creatine groups were part of a complicated intervention, and the researchers measured several different outcomes.

So we shouldn’t turn this into “creatine makes older people smarter.”

And dementia?

This is where the evidence gets much thinner.

A 2026 review specifically examined creatine and dementia-related cognitive outcomes. After screening more than 8,000 records, researchers found only one small human pilot trial that met their criteria.

There were no relevant randomized controlled trials in people with dementia.

The pilot study involved just 20 people and used a much higher dose—20 grams a day for eight weeks. It found an increase in brain creatine and an improvement in a measure of fluid cognition.

Interesting?

Absolutely.

Enough to say creatine prevents dementia?

No.

Why might the brain benefit?

One possibility is simply energy.

Creatine and phosphocreatine act as an energy buffer, helping cells maintain ATP when energy demand rises. Researchers are also investigating possible effects involving oxidative stress, inflammation and neuroplasticity.

But knowing that a supplement could influence these biological processes isn’t the same as demonstrating that taking it produces meaningful long-term cognitive benefits.

That’s an important distinction in supplement research.

So, should older adults take creatine for their brains?

The honest answer right now is:

We don’t know yet.

The evidence for creatine helping muscle strength, particularly when combined with resistance training, is considerably stronger.

The evidence for memory and cognition is promising enough to be interesting—but not strong enough to call creatine a proven brain supplement.

And there’s an even bigger leap from “might support cognition” to “prevents dementia.”

We aren’t there.

The Watchdog takeaway

If you’re already interested in creatine because you’re trying to maintain strength as you age, the possibility of a cognitive benefit is an interesting bonus.

But don’t buy creatine because someone tells you it will protect your brain.

The research is promising. The answer isn’t in yet.