20–30g for sleep-deprived brain
A study giving 30g of creatine to volunteers sleep-deprived for 21 hours showed it increased brain creatine levels and offset cognitive decline.
Snapshot · The Diary Of A CEO with Steven Bartlett
Creatine Expert: Creatine Is The Secret To Weight Loss
Explore episode
Jun 15, 2026
Where this was said
The Dosing Dilemma: Brain & Sleep Deprivation
At 31:04 · chapter starts 28:40
A healthy brain self-synthesises creatine. Under stress or sleep deprivation, 20–30g acutely is needed. German study: 30g offset cognitive decline after 21-hour sleep deprivation.
20% of body energy used by brain
The brain weighs about 2 kilograms but consumes 20% of the body's total daily energy at rest.
Why Your Stressed Brain Needs More Creatine
A rested brain makes enough creatine on its own. But sleep deprivation, time zone shifts, exam pressure, and high-stakes performance all create metabolic stress that depletes brain creatine faster than it can be synthesised. At 20–30g acutely, supplementation crosses the blood-brain barrier and partially restores cognitive performance.
The Stroop Test: Creatine's Brain Proof
In a landmark study, participants given 20g of creatine before a 90-minute Stroop test — where you must name ink colours while reading conflicting colour words — showed statistically significant improvements in both speed and accuracy. The Stroop test is one of the most cognitively fatiguing tasks used in creatine research.
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