Creatine for muscle and brain: how much do you need?

Creatine is the most thoroughly researched supplement in sport. Once the preserve of bodybuilders, it now sits in the kitchen cupboards of people who mainly want to keep their mind sharp. Social media tells you it boosts focus, memory and energy. The question is how much of that holds up, and how much you should take.

For your muscles, the evidence is strong and 3 to 5 grams a day is enough. For your brain, the signals are interesting but smaller than the stories suggest.

What creatine does in your body

Your body makes creatine itself, and you also get it from meat and fish. In your muscles it is stored as phosphocreatine, a fast energy buffer for short, intense efforts: a heavy set, a sprint, taking the stairs two at a time. The fuller that buffer, the longer you keep delivering quality.

Your brain runs on the same system. It uses roughly a fifth of your energy, and creatine helps keep that energy supply stable, especially under pressure. That is why researchers started looking at the brain. People who eat little or no meat and fish have lower stores and often notice more effect from topping up.

For your muscles: 3 to 5 grams a day

Here the science agrees. The International Society of Sports Nutrition calls creatine monohydrate the most effective supplement for gaining strength and muscle mass with strength training¹. There are two routes:

• Loading: 5 grams four times a day for five to seven days, then 3 to 5 grams a day.
  
• Straight to 3 to 5 grams a day. After three to four weeks you reach the same level.

Loading is simply faster. The end result is the same.

Creatine only does something when there is a training stimulus to match. It fills the buffer, and targeted strength training makes sure you actually use it. As you get older and muscle mass slowly declines, that combination becomes especially valuable. We wrote about this earlier in strength training after 40.

For your brain: what research shows

A 2024 meta-analysis pooled 16 controlled studies with almost 500 adults². Creatine produced a measurable improvement in memory, and participants became slightly faster on attention and processing tasks. There was no effect on overall cognition or on planning and organising. The gains were mainly seen in adults up to 60 and in people with a medical condition. In healthy people the effect was small.

The most striking result comes from a German study on sleep deprivation³. Participants stayed awake for a night and received a high dose of 0.35 grams per kilo of body weight. After about four hours they scored better on memory and reaction tasks and felt less fatigued. The effect lasted until at least nine hours after intake. A caveat: this involved 15 young participants and a dose of around 25 grams. So it is not advice for daily use.

Why the evidence is still shaky

In 2024 the European Food Safety Authority, EFSA, assessed an application to promote creatine for better brain function. It was rejected: according to EFSA, a cause-and-effect relationship has not been established⁴. The studies are small, use different doses and measure cognition in different ways.

On top of that, your brain takes up creatine far less easily than your muscles do. The standard dose fills your muscles but barely raises the level in your brain. Researchers suspect the brain needs something closer to 10 grams a day. For now, that remains a hypothesis.

If you sleep badly, a scoop of powder will not fix it. Sleep and recovery remain the foundation. At most, creatine is a small support when things are temporarily tough.

How we approach it in practice

At de Werf we see creatine as a small, cheap and safe tool within a bigger plan. In healthy people, use of up to 30 grams a day for five years has been studied without harmful effects¹. Our advice:

• Choose creatine monohydrate. More expensive forms work no better.
  
• Take 3 to 5 grams a day as standard, every day, including rest days. Timing matters little.
  
• If you also want to support your focus, eat plant-based or are chronically short of sleep, go to 5 to 10 grams a day, split over two moments.
  
• Expect 1 to 2 kilos of extra weight from water in your muscles. That is not fat.
  
• If you have kidney problems, talk to your doctor first. When you have blood tests, mention that you take creatine. Your creatinine level rises without anything being wrong with your kidneys.

A supplement is the finishing touch. Your protein intake, meal rhythm and sleep need to be right first. We work on that within our nutrition and lifestyle coaching.

A real example from our practice

"A client in a senior leadership role asked which supplement would help her get through long working days. She slept five to six hours a night and trained whenever it fitted in. We started with her rhythm: fixed training moments, an earlier bedtime and protein with every meal. Creatine came later, 5 grams a day. After three months she was stronger, but the biggest difference she noticed herself was that her afternoon slump had gone. We mostly put that down to her sleep. The creatine was the support, the rhythm the foundation."

If work pressure is steadily draining your energy, we look beyond training and nutrition, for example within our coaching for burnout and stress.

Start with your rhythm

Want to know what your body needs, from training to nutrition and recovery? In an intake we map out your starting point and your goal together. Schedule an intake

Read also:
Our coaching in physical training and nutrition and lifestyle.

Sources:
¹ Kreider et al. (2017), ISSN position stand: safety and efficacy of creatine supplementation
² Xu et al. (2024), Frontiers in Nutrition: creatine supplementation and cognitive function in adults
³ Gordji-Nejad et al. (2024), Scientific Reports: single dose creatine during sleep deprivation
⁴ EFSA (2024): creatine and improvement in cognitive function