A new study shows creatine may reverse the mental fog from sleep deprivation. Longevity expert Siim Land put it to the test — with 28 grams a day. Here’s what happened.
Could something as simple as creatine powder help your brain recover from a sleepless night?
That’s the question longevity author Siim Land set out to answer after reviewing a 2024 study on creatine and cognitive performance.
The research found that a single dose of creatine — 0.35 grams per kilogram of body weight — improved mental function after 21 hours of sleep deprivation. Land, inspired by this, took matters into his own hands.
For one week, he consumed 28 grams of creatine every morning after shortened sleep. The goal? To see if the supplement could really make him feel sharper and more alert after sleeping just 6–7 hours a night.
Jump to:
- Why Creatine Might Be More Than Just a Gym Supplement
- What the Science Actually Says
- Why Siim Land Took 28 Grams of Creatine a Day
- What Happened: Energy, Cognition, and Side Effects
- Is It Safe to Take This Much Creatine?
- What’s the Optimal Dose for Brain Performance?
- Can Creatine Replace Sleep? Not Quite — But It Helps
- Should You Try It?
- The Bottom Line
Why Creatine Might Be More Than Just a Gym Supplement
While creatine is most often linked to muscle performance and gym gains, its effects on the brain are gaining serious attention in the science world.
The brain, while making up only 2% of body weight, consumes around 20% of the body’s daily energy. That energy is powered by adenosine triphosphate (ATP), the body’s main energy molecule — and creatine helps regenerate ATP.
Land explains:
“Creatine helps recycle ATP, the fuel source for your cells. Since your brain is a huge energy hog, having more creatine can support cognition, especially when you’re under stress like sleep deprivation.”
What the Science Actually Says
In the 2024 study that caught Land’s attention, researchers gave participants a single large dose of creatine (0.35 g/kg, or about 28 grams for an 80 kg person) after keeping them awake for nearly a full day.
Despite the extreme sleep deprivation, those who received creatine saw:
- Faster reaction times
- Better short-term memory
- Improved decision-making speed
Land wasn’t the only one intrigued. Past research backs this up:
- A 2022 meta-analysis showed that creatine can improve memory in healthy adults at doses between 2.2 and 20 grams per day.
- In elite athletes, as little as 100 mg/kg of creatine (just 8 grams for an 80 kg person) reduced the performance dip caused by sleeping only 3–5 hours.
Why Siim Land Took 28 Grams of Creatine a Day
Land weighed 80 kilograms. That meant following the study dosage precisely — 28 grams per day.
“I wanted to see if creatine could really buffer the effects of sleep loss. Could it make me feel like I’d slept a full night when I hadn’t?”
Each morning, he took the full 28-gram dose — typically in water or milk — and then went about his day after sleeping just six to seven hours.
What Happened: Energy, Cognition, and Side Effects
Within 1 to 2 hours of taking the high dose, Land began to feel a change.
“It wasn’t immediate. But after a little while, I felt more energized — like I’d had a full 8 hours, even though I’d only slept six. Cognitively, I was sharper, more alert.”
This matched what the research suggested. Creatine doesn’t just restore performance — it may even enhance it, especially under stress conditions like sleep deprivation.
But it wasn’t all upside.
“I did feel a bit nauseous after taking it. My stomach wasn’t great. I wouldn’t call it extreme — more like discomfort, soft stools, Bristol Type 5. It wasn’t diarrhea, but it was noticeable.”
So while the mental benefits were real, there were mild digestive side effects to megadosing creatine daily.
Is It Safe to Take This Much Creatine?
In healthy individuals, short-term high doses of creatine are generally considered safe, especially for those without preexisting kidney issues.
“As long as your kidneys are healthy and you’re well-hydrated, taking 28 grams of creatine for a week isn’t dangerous. But it’s not something I’d recommend doing constantly.”
Possible side effects include:
- Bloating
- Nausea
- Loose stools
- Headaches
Importantly, no studies to date show long-term harm from short-term loading phases, especially in otherwise healthy people.
What’s the Optimal Dose for Brain Performance?
There are two main approaches to taking creatine:
- Loading phase:
- 20–25 grams per day for 5–7 days
- Followed by 3–5 grams daily to maintain creatine saturation
- Daily low-dose:
- 3–5 grams per day
- Takes about 4 weeks to reach full saturation
For cognitive and physical performance, 100 mg per kg of body weight per day appears optimal. That’s just 8 grams a day for someone weighing 80 kg — much lower than the megadose Land experimented with.
“I usually take 5 to 8 grams per day when I’m not loading,” Land says. “That’s enough for maintaining high levels in the brain and muscles.”
Can Creatine Replace Sleep? Not Quite — But It Helps
The idea that a supplement could replace sleep is far-fetched. But creatine seems to buffer the worst effects of short-term sleep loss.
For anyone experiencing:
- Early morning flights
- Stressful work weeks
- Jet lag
- All-nighters for exams or deadlines
Creatine may help you think more clearly, respond faster, and feel more alert, even on less sleep.
“I don’t think it’s healthy to megadose creatine forever,” Land admits. “But in the short term? It can really help your brain stay sharp when your sleep isn’t perfect.”
Should You Try It?
If you’re in good health and looking for a short-term cognitive edge after sleep deprivation, a one-week loading phase of creatine could be worth considering.
But go into it with eyes open:
- Start with smaller doses (5–10 grams) to test tolerance
- Be aware of potential digestive side effects
- Stay hydrated — water intake is critical during creatine loading
- Don’t treat it as a long-term solution for poor sleep hygiene
The Bottom Line
Creatine is one of the most studied and effective supplements for improving physical performance, cognitive function, and even mental energy — especially under stress.
Siim Land’s self-experiment supports what the science shows:
“Creatine helped me feel like I hadn’t missed a minute of sleep — even though I had.”
While not a replacement for rest, creatine might just be your brain’s best backup plan when life gets in the way of 8 hours.
