Creatine 0.2 g/kg improves cognition

Creatine is usually sold as a gym supplement. But the interesting news here is about the brain — specifically, what happens when people are running on no sleep. A new paper from researchers at Forschungszentrum Jülich says a single dose of creatine monohydrate, scaled to body weight at 0.2 g/kg, reduced the usual drop in cognitive performance during 21 hours of sleep deprivation. That is a more practical follow-up to the team’s earlier 0.35 g/kg study, which used a bigger one-off dose and also found benefits. (mdpi.com) ### What actually changed here? The new study was not the first hint that creatine might help a sleep-deprived brain. The change is that the researchers tested a lower acute dose — 0.2 g/kg instead of 0.35 g/kg — and still saw a benefit. They ran cognitive tests at baseline and then 3, 5.5, and 7.5 hours after creatine or placebo while participants stayed awake for a total of 21 hours. (mdpi.com)as a small study in 29 healthy subjects. That matters because small sleep-lab studies can pick up real effects, but they are not the same thing as broad proof that a supplement will help everyone in daily life. The paper reports reduced deterioration rather than some dramatic transformation — basically, people declined less than they otherwise would have. (mdpi.com)t point is not “creatine made people smarter.” It is narrower than that. The paper says creatine mitigated sleep deprivation-related deterioration in logical and numerical tasks, language-related processing speed, and the Psychomotor Vigilance Test, which is a standard way to measure lapses in attention and reaction under fatigue. The authors say the improvement reached up to 12%, though i(mdpi.com)study. (mdpi.com) ### Why would creatine help the brain? Creatine is part of the cell’s quick-energy system. Muscles use that system heavily, which is why the supplement became famous in sports. But the brain also burns a lot of energy, and sleep deprivation seems to stress that energy balance. The earlier 2024 paper from the same group linked a single 0.35 g/kg dose to changes in brain high-energy phosphates and better cognitive perform(mdpi.com)c clue behind this newer lower-dose test. (nature.com) ### Is this a general brain booster? Not really — or at least not proven yet. The broader literature is mixed. A 2024 meta-analysis pooling 16 randomized trials found significant benefits for memory, attention time, and processing speed time, but not for overall cognitive function or executive function, and the certainty of evidence was only moderate for memory and low for several other outcomes. So the (nature.com)ettings, not that it is a universal nootropic. (frontiersin.org) ### Why does sleep deprivation matter so much? Because this may be the condition where creatine has the best shot at showing an effect. When the brain is under metabolic stress — no sleep, maybe illness, maybe other energy-demanding states — extra creatine could matter more. That is different from asking whether a well-rested person should expect sharper thinking on a(frontiersin.org) (mdpi.com) ### So should people start taking big single doses? That is the catch. The study shows a signal, but it is still preliminary and very specific — healthy adults, controlled sleep deprivation, small sample, one supplement form, one dosing setup. A weight-based 0.2 g/kg dose is also not tiny. For a 70 kg adult, that is 14 g in one go. The paper itself frames the effect as smaller than the prior 0.35 g/kg result, not as settled guidance for routine use. (mdpi.com) ### Bottom line The new result is real enough to be interesting. A single moderate-to-high dose of creatine appears to help people think a bit better when sleep deprivation is dragging performance down. But this is still a “stress test” finding, not a blanket case that creatine reliably upgrades cognition in everyday life. (mdpi.com)