Does creatine reduce prefrontal cortex oxygen use during cognitive tasks?

This finding comes from a single observation, and while it points toward a possible effect, the change in oxygen use was not large enough to be called statistically significant. That means we can’t say for sure whether the drop in oxygen levels was caused by creatine or happened by chance. The prefrontal cortex is the part of the brain involved in decision-making, focus, and problem-solving, and lower oxygen use during mental tasks could mean the brain is working more efficiently — but we don’t know that for certain from this data.

We have no studies that contradict this result, but we also have very little evidence overall. Only one assertion was reviewed, and it did not show a clear, strong effect. Because of this, we can’t say creatine reliably changes brain oxygen use, even though the direction of the result is consistent with the idea.

What we’ve found so far is a hint — not a pattern. More research with larger groups and stronger measurements would be needed to see if this effect holds up. For now, if you’re considering creatine for brain function, this single observation doesn’t give us enough to recommend it for that purpose, but it also doesn’t rule it out.