Creatine and Your Brain: What the Research Shows

You might know creatine as the gym supplement that supports strength and muscle. Maybe you already take it and have heard it could help your head as well. Maybe you don't train at all, you eat mostly plants, or you're getting older and want to look after your memory. No silly questions here. This guide is for all of you.

We'll explain why your brain needs creatine, walk through what the studies actually found, and help you work out whether it's worth adding to your day.

Why your brain uses creatine

Your brain is one of the most energy-hungry organs in your body. [2] Creatine helps your cells recycle ATP, the molecule that carries energy, in both muscle and brain tissue. [4]

Your body makes about half of the creatine it needs each day. The rest comes from food, mainly meat and fish. [5] That's why people who eat little or no meat tend to have lower creatine stores.

Can a supplement reach your brain? Yes, though more slowly than muscle. In an early brain-scan study, taking 20 g of creatine a day for four weeks raised brain creatine by an average of 8.7%, with bigger rises in some areas. [6] Researchers now think the brain's response depends on the dose and how long you take it. [7]

What the research shows

Four major reviews since 2018 point the same way: creatine supports memory, with the clearest results in older adults. Memory is where the evidence is strongest; the effect is small to moderate, a helpful nudge rather than a transformation. [2] [8]

The evidence so far

Four reviews, one direction: memory

1. 2018

   Avgerinos et al. [1]

   6 trials, 281 healthy people

   May support short-term memory and reasoning. Vegetarians responded better on memory tasks. Most promising for ageing and stressed people.

2. 2023

   Prokopidis et al. [2]

   8 trials in a meta-analysis, healthy people

   Better memory scores than placebo overall, larger effect in adults aged 66 to 76.

3. 2024

   Xu et al. [8]

   16 trials, 492 adults aged 21 to 76

   Supported memory (moderate certainty, the highest of any area reviewed), plus faster processing speed and attention time (newer and less certain, promising rather than proven).

4. 2026

   Marshall et al. [9]

   6 studies, 1,542 adults aged 55+

   5 of 6 linked creatine with better cognition in older adults, mainly memory and attention.

Dot size shows how many people each review covered.

Women

In the 2024 meta-analysis, creatine appeared more beneficial for women than men. [8] A 2026 sleep-deprivation trial found the same pattern, with women benefiting more on logic, reaction and processing-speed tasks. [10] Women also tend to have lower creatine levels in part of the brain. [11] For more, see creatine for women.

Where the research is honest about limits

Not every study finds a benefit. Younger adults tend to see the smallest effect, which is one reason results vary between trials. [2] The largest single trial so far, with 123 people taking 5 g a day for six weeks, found a small benefit overall and concluded that even a small effect could add up to a lot over time and across many people. [4] Creatine looks most promising where your brain is under the most pressure: getting older, short on sleep or eating little creatine from food. [1]

Creatine when you're short on sleep

This is one of the most exciting areas of the research. Sleep loss drains your brain's energy reserves, and creatine supports them.

Short on sleep

Creatine and sleep loss, study by study

• 24 hours without sleep

  2006 [12]

  Loaded creatine, 5 g four times a day for a week, before staying up for 24 hours

  Significantly less decline than placebo on reaction time, balance, mood and demanding thinking tasks.

• A single dose

  2024 brain-scan study [3]

  One large dose, 0.35 g per kg, taken during a night of sleep deprivation

  Supported changes in brain energy markers and faster processing speed, and reduced the drop in thinking performance.

• A smaller dose

  2026 follow-up, 29 people [10]

  Lower single dose, 0.2 g per kg, during 21 hours awake

  Supported logic, number tasks, language processing speed and alertness, by up to 12%.

• Sport

  Elite rugby players [13]

  Slept only 3 to 5 hours. A single dose of 50 or 100 mg per kg, 90 minutes beforehand

  Passing accuracy dropped on placebo; creatine gave significantly better passing accuracy than placebo.

Those single doses are much larger than a daily scoop (0.2 g per kg is 14 g for a 70 kg person), and they were given under research conditions. The practical take-home: keeping your stores topped up every day is the simple way to support your brain on the nights you don't sleep well. Shift workers, new parents and anyone travelling across time zones may find this especially relevant. It doesn't replace sleep. See our sleep guide for that.

Ageing and memory

Creatine supports both your muscles and your brain as you get older.

• Memory. In the 2023 meta-analysis, adults aged 66 to 76 saw a clearly larger memory benefit than younger people. [2]
• Midlife, with or without exercise. In a 2026 trial of 64 adults aged 45 to 65, 10 g a day for 12 weeks supported lean tissue, strength and selected measures of memory and thinking, both in people who started an exercise and diet programme and in people who didn't. [14] The researchers describe the brain findings as early, so watch this space.

Pair creatine with some strength training and you also support the muscle and strength that keep you moving well for decades. Our creatine guide covers the muscle side, and protein and creatine during menopause covers midlife for women.

Creatine and mood

Researchers are also studying creatine and mood. Creatine supported better mood in people kept awake for 24 hours. [12] In a 2025 trial of 100 adults with depression, those taking creatine alongside talking therapy (cognitive behavioural therapy) saw a bigger improvement in their scores over eight weeks than those on placebo plus therapy. [15] This research is early. Creatine isn't a treatment for depression, and any change to how you manage your mental health belongs with your doctor.

Who it may suit

• People who don't train

  You don't need a gym membership for your brain to use creatine. The midlife trial saw benefits without an exercise programme. [14]

• Vegetarians and vegans

  Less creatine comes from food when you eat little or no meat. Young vegetarians taking 5 g a day for six weeks improved on working memory and reasoning tests. [16] In another trial, vegetarian women saw better memory after five days of creatine, while meat-eaters didn't. [17] Not every trial finds a bigger effect for vegetarians [4], but if your diet is low in creatine, a supplement is the practical way to top up.

• Adults over 50

  Older adults show the clearest memory benefits in the research. [2] [9]

• Women

  Recent research suggests women may benefit more. [8] [10]

• Anyone with broken sleep

  Shift workers, new parents, frequent travellers. [3] [12]

• People who already train

  You're already getting the muscle benefits. Your brain gets a share too.

Check first

Creatine isn't recommended for anyone under 18, or if you're pregnant or breastfeeding. If you have kidney disease, take medication or manage a health condition, including depression or memory problems, talk to your GP first.

How much, and for how long?

• Daily dose: 3 to 5 g a day, every day, is the standard amount and has a long safety record in healthy people. [5] Brain studies have used anywhere from about 2.2 to 20 g a day, and in the 2023 meta-analysis the dose didn't change the memory results. [2]
• Give it time: your muscle stores take about 3 to 4 weeks to fill at 3 to 5 g a day. [5] The brain fills more slowly, so think in weeks to months. Many brain studies ran for 6 to 12 weeks. [4] [14] [16]
• Loading is optional: see creatine loading vs daily dose.
• Any time of day: consistency matters more than timing. Creatine has no caffeine, so morning or evening both work.

Pairing creatine with a focus supplement? Our guide to supplements for focus and productivity covers the options.

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