Quick answer
Creatine monohydrate is a well-studied supplement that helps muscles regenerate energy for short, intense efforts. Combined with resistance training it can modestly increase muscle and strength, including in older adults. Research also suggests benefits for memory, especially in older people. Around 3–5 g a day is a typical, well-tolerated dose for healthy adults.
Key takeaways
- Creatine has a large safety evidence base in healthy people, from young athletes to older adults.
- With resistance training it produces small but real gains in muscle size, lean mass and strength.
- A 2023 meta-analysis found improved memory, with the clearest effect in adults aged 66–76.
- 3–5 g of creatine monohydrate daily is typical. A loading phase is optional.
- Speak to a doctor first if you have kidney disease or take medicines that affect the kidneys.
What does creatine do in the body?
Creatine is a compound your body makes and also gets from meat and fish. Most of it is stored in muscle as phosphocreatine, which rapidly recycles ATP, the energy currency cells use for short, powerful efforts like lifting, sprinting or climbing stairs.
Supplementing increases muscle creatine stores. That helps you do slightly more high-quality work in training, which over time drives greater adaptation 1. People who eat little or no meat or fish tend to start with lower stores, so they may notice more of a difference.
Does creatine build muscle and strength?
Yes, modestly, and mainly when paired with resistance training. A 2023 meta-analysis using direct imaging (MRI, CT or ultrasound) found creatine plus resistance training produced a small additional increase in muscle thickness in both upper and lower body compared with training alone 2.
For older adults, where preserving muscle is central to staying independent, a meta-analysis found creatine alongside resistance training augmented gains in lean tissue mass and strength. Interestingly, taking creatine only on training days was also effective 3.
Can creatine improve memory and brain health?
The brain is energy-hungry, and creatine plays a role in brain energy metabolism. In a 2023 meta-analysis of randomised controlled trials in healthy people, creatine improved measures of memory compared with placebo. The effect was clearest in older adults aged 66–76, with little change in younger participants 4.
A 2024 meta-analysis reported potential benefits for memory, attention time and information processing speed in adults, while calling for larger, more robust trials 5. The signal is promising but still emerging, so brain benefits should be seen as a possible bonus rather than a guarantee.
How much creatine should you take?
- Form: creatine monohydrate is the most studied and least expensive form.
- Daily dose: 3–5 g per day is typical for healthy adults.
- Loading (optional): about 20 g per day split into doses for 5–7 days saturates stores faster, but a steady daily dose reaches the same point within a few weeks.
- Timing: consistency matters more than timing. Taking it with a meal is fine.
The International Society of Sports Nutrition reports that short- and long-term supplementation is safe and well tolerated in healthy individuals across a wide range of ages 1.
Who should be cautious with creatine?
Creatine slightly raises blood creatinine, a marker doctors use to estimate kidney function, which can make results look worse than they are. Tell your doctor you take it before blood tests. If you have kidney disease, diabetes affecting the kidneys, or take medicines that affect kidney function, get medical advice first. A small increase in body water and weight in the first weeks is common and expected.
Frequently asked questions
Is creatine safe for women?
Yes. Research in healthy women shows creatine is well tolerated, and it may be especially relevant during midlife and beyond, when preserving muscle and strength becomes more important. The same general precautions apply as for men.
Does creatine cause hair loss?
This claim traces back to one small study that measured a hormone (DHT), not hair loss itself. It has not been reliably replicated, and there is no strong evidence that creatine causes hair loss.
Should I cycle creatine?
Cycling on and off is not necessary. Studies support continuous daily use in healthy adults. If you stop, muscle creatine stores return to baseline over several weeks.
Is creatine only for athletes?
No. Some of the most interesting research involves older adults, where creatine with resistance training supports lean mass and strength, and where memory benefits appear strongest.
Sources
- Kreider RB, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18. doi.org/10.1186/s12970-017-0173-z
- Burke R, et al. The effects of creatine supplementation combined with resistance training on regional measures of muscle hypertrophy: a systematic review with meta-analysis. Nutrients. 2023;15(9):2116. doi.org/10.3390/nu15092116
- Forbes SC, et al. Meta-analysis examining the importance of creatine ingestion strategies on lean tissue mass and strength in older adults. Nutrients. 2021;13(6):1912. doi.org/10.3390/nu13061912
- Prokopidis K, et al. Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials. Nutr Rev. 2023;81(4):416–427. doi.org/10.1093/nutrit/nuac064
- Xu et al. The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Front Nutr. 2024;11:1424972. doi.org/10.3389/fnut.2024.1424972
Medical disclaimer: This article is for general information and education only and is not medical advice. It does not replace diagnosis or treatment by a qualified clinician. Talk to your doctor or pharmacist before starting supplements, especially if you are pregnant, take medicines or have a medical condition. Evidence reviewed as of 16 September 2026.
