Creatine Isn't Just for Bodybuilders. Your Brain Wants It Too.

A 62-year-old patient sat across from me last week, a little sheepish. "Doctor, my daughter wants me to take creatine. Isn't that for gym bros?"

I smiled, because I get some version of this question almost every week now. Short answer: no, it isn't. Not anymore. Over the past two years, creatine has quietly been reclassified by the longevity and geriatrics literature as one of the most well-studied, safest, and most useful supplements for healthy ageing. Not a shortcut to bigger biceps. A naturally occurring compound your liver, kidneys and pancreas already make, that can meaningfully move the biomarkers we actually care about as we get older.

What Creatine Actually Does (In Plain English)

Every cell in your body runs on a molecule called ATP, or adenosine triphosphate. Think of ATP as the cash in your wallet. Every time a muscle fibre fires or a neuron transmits a signal, it spends a bit of ATP. The problem is you only carry a few seconds of ATP on you at any moment. Creatine is the ATM that refills it.

Specifically, creatine (stored in tissues as phosphocreatine) donates a phosphate group to regenerate ATP very rapidly. Tissues with the highest energy demand (skeletal muscle, brain, heart, retina) are also the ones with the most creatine. Your body makes about 1 to 2 grams a day on its own, and you take in another 1 to 2 grams through diet if you eat red meat and fish. Vegetarians and older adults tend to sit on the lower end of that range.

This matters more with age. After about 50, we lose muscle mass at roughly 1 to 2 per cent per year, and muscle is where most of our creatine lives. Less muscle means a smaller creatine reservoir, which means a slower energy buffer for the brain and body when you most need it.

The Muscle Case: Stronger Than People Realise

Multiple systematic reviews in the last three years have converged on the same message: creatine plus resistance training beats resistance training alone in older adults. A 2025 meta-analysis in the European Review of Aging and Physical Activity found the combination added about 1.3 kg of lean tissue and meaningful strength gains over placebo plus training, with benefits most pronounced at 16 to 32 weeks. A 2024 review in Frontiers in Physiology said the same thing: creatine is a multiplier for the work you are already doing. Without lifting, it does very little.

Why This Matters in Singapore

The Yishun Study, which remains one of the most cited datasets on muscle health in Singaporean adults, found that sarcopenia (age-related loss of muscle mass and strength) affected about 13.6 per cent of the adult population overall. Among adults 60 and above, prevalence jumped to 32.2 per cent, or roughly one in three. In post-acute hospital settings the numbers are worse still, with more than half of admitted older adults meeting criteria for sarcopenia.

Sarcopenia is not cosmetic. It predicts falls, fractures, hospitalisation, loss of independence and mortality. The 2022 Singapore Clinical Practice Guidelines for Sarcopenia put resistance exercise and adequate protein as first-line, with nutritional adjuncts considered case by case. Creatine fits squarely in that adjunct category.

Translation: if you are over 60 and lifting something heavier than your handbag twice a week, adding 3 to 5 g of creatine monohydrate daily is one of the most evidence-based things you can do for your future self.

The Brain Case: The Newer, More Interesting Story

Your brain uses about 20 per cent of your body's energy despite being around 2 per cent of its weight. Roughly 5 per cent of your creatine stores live there. Anything that strains brain energy (sleep deprivation, ageing, mild cognitive impairment) is a situation where brain creatine might matter.

1. Sleep-deprived brains benefit from creatine almost immediately.

A 2024 study in Scientific Reports by Gordji-Nejad and colleagues gave healthy adults a single high dose of creatine (0.35 g/kg, about 24 g for a 70 kg person) before a full night of sleep deprivation. Using MR spectroscopy, they showed the dose actually raised brain phosphocreatine and ATP, and the participants performed measurably better on cognitive tests than placebo despite being just as sleep deprived. That quietly dismantled the old dogma that oral creatine cannot cross the blood-brain barrier in useful amounts.

Follow-up 2025 and 2026 trials using lower, more practical doses reached the same conclusion: during sleep deprivation, creatine protects reaction time, working memory and executive function. For shift workers, new parents, and anyone pulling the occasional all-nighter, that is practically useful.

2. In older adults, the cognitive signal is emerging but not yet decisive.

A 2025 systematic review in Nutrition Reviews focused specifically on creatine and cognition in older adults. The honest read: limited evidence suggests a benefit, with trends toward better short-term memory and reasoning, but we still need larger, higher-quality trials. A 2024 meta-analysis of all adults pointed the same way, while a separate 2024 review in Behavioural Brain Research was more cautious, arguing the mechanism is strong but the human data still inconsistent.

That is what honest science looks like. The signal is real, the mechanism is plausible, the effect size likely modest but non-zero. I would not tell a patient to take creatine to "prevent dementia". I would tell them that if they are already lifting, already protein-sufficient, and already doing the Lancet Commission dementia-prevention basics, creatine is a low-risk, low-cost add-on that may nudge a few cognitive domains in the right direction.

Creatine for Women, Especially Around Menopause

Historically, almost every creatine trial was done on young men. That is finally changing, and the 2025 women's health literature is some of the most interesting in this field.

A May 2025 review in the Journal of the International Society of Sports Nutrition pulled together what we now know across the female lifespan. Women store roughly 70 to 80 per cent of the creatine that men do per kilogram of lean mass, and oestrogen influences creatine kinetics. As oestrogen falls through perimenopause and menopause, both muscle and creatine stores decline, which is part of the biology behind the strength loss, body composition shift and cognitive fog many women describe.

A 2025 RCT in peri- and postmenopausal women (CONCRET-MENOPA) and a separate 2025 body composition study both showed creatine during this window increased lower body strength, improved some cognitive markers, and improved subjective sleep quality. It did not change circulating oestrogen. It simply made the existing oestrogen-poor biology work a bit better. For women in or approaching menopause who are already strength training, the risk-benefit is genuinely favourable. If you are not lifting, start there first. Creatine without load is like fertiliser on concrete.

Is It Safe? The Kidney Question, Honestly

This is the single most common worry I hear, and it usually comes from something a relative read in a forum in 2005. The 2026 evidence: in healthy adults with normal kidney function, creatine monohydrate at 3 to 5 g per day, studied for months to years, does not impair kidney function. That holds across studies in older adults with type 2 diabetes, patients with rheumatic disease, and frail older adults.

One important nuance: creatine will often nudge your serum creatinine up slightly. That is a by-product of the supplement itself, not a sign of kidney damage, and it is not the same as a real drop in glomerular filtration rate. Your doctor needs to interpret it in context.

Real cautions do exist. If you have chronic kidney disease, polycystic kidney disease, a single functioning kidney, or you are on nephrotoxic medications, do not self-start. Similarly, if your kidney function is abnormal on screening bloods, we need to establish a cause and a baseline before adding a supplement that will cosmetically bump your creatinine. Other side effects are minor: mild water retention, occasional GI upset at very high single doses, and a small early scale-weight rise from fluid shifting into muscle. Nothing that justifies the conspiracy-tier fear this molecule still attracts.

How I Actually Use It in Clinic

1. The dose is simpler than the internet makes it look.

Three to five grams of creatine monohydrate, taken once daily. You do not need to "load" with 20 g for a week. That just fills the tank faster, and fills the toilet too. Daily low-dose reaches full saturation in about three to four weeks, which is fine for a supplement you intend to take for life.

2. Buy creatine monohydrate. Not the fancy stuff.

Creatine HCl, creatine ethyl ester, buffered creatine, micronised creatine, all of these are marketing. Creatine monohydrate is the form used in essentially every high-quality trial in the last 30 years. Look for a product with the "Creapure" designation (a German manufacturing standard), or any reputable brand that publishes third-party testing. It should cost you under S$50 for several months of supply.

3. Timing barely matters.

With food or without food, morning or evening, before or after training, the effect on intramuscular creatine stores over weeks is essentially the same. Pick the time you will actually remember. Mine goes into the morning coffee.

4. Pair it with the non-negotiables.

Creatine without resistance training is a waste. Resistance training without adequate protein (around 1.2 to 1.6 g/kg body weight per day for older adults, based on the ESPEN and PROT-AGE consensus) is also a waste. If you are over 50 and not yet doing two proper strength sessions a week, that is the intervention with the biggest return on investment. Creatine sits on top.

5. Get your bloods before you start.

A simple baseline (renal panel, liver panel, full blood count, fasting glucose, HbA1c, lipid panel) is good practice for anyone starting any long-term supplement, particularly over 50. It also gives your doctor a baseline creatinine before the supplement cosmetically nudges it up.

Who Probably Shouldn't Take It (Yet)

To be clear, not everyone needs creatine.

If you are under 30, lift regularly, eat enough protein, sleep seven to nine hours, and your goals are general health rather than performance, creatine is a small optimisation, not an essential. Fix the basics first.

If you have kidney disease, polycystic kidney disease, a single kidney, untreated hypertension, or you are on nephrotoxic medications, please do not self-start. Talk to your doctor. The recommended next step is a clinic visit for a renal panel, blood pressure assessment, and a medication review before considering supplementation.

If you are pregnant or breastfeeding, the data are still limited. Creatine demand rises in pregnancy, and there is promising preclinical work, but I would not supplement without obstetrician input.

If you are a competitive athlete subject to anti-doping testing, creatine monohydrate is WADA-legal, but buy only from a manufacturer with Informed-Sport or NSF Certified for Sport testing to avoid contaminated batches.

The Bottom Line

Creatine will not replace sleep, training, protein, or managing your blood pressure and cholesterol. Nothing will. But it is a rare longevity intervention where the downside is low, the cost is modest, and the evidence has genuinely matured in the last two years. In clinic, I rarely just "prescribe creatine". I read the body composition, the VO2max, the grip strength and the bloods first, then decide. Built around your numbers, not the internet's latest fad. Creatine happens to be a fad that has earned its place. Most do not.

So yes, I did tell my 62-year-old patient to start. Five grams in the morning coffee, two strength sessions a week, recheck bloods in three months. His daughter, it turns out, had been reading the right papers.

References

1. Candow DG, Forbes SC, Ostojic SM, et al. Creatine and Cognition in Aging: A Systematic Review of Evidence in Older Adults. Nutrition Reviews. 2026;84(2):333-345. DOI: 10.1093/nutrit/nuaf135
2. de Guimarães-Ferreira L, Silva-Cavalcante MD, Cholewa JM, et al. The impact of creatine supplementation associated with resistance training on muscular strength and lean tissue mass in the aged: a systematic review and meta-analysis. European Review of Aging and Physical Activity. 2025;22:18. DOI: 10.1186/s11556-025-00392-9
3. Candow DG, Forbes SC, Roberts MD, et al. The power of creatine plus resistance training for healthy aging: enhancing physical vitality and cognitive function. Frontiers in Physiology. 2024;15:1496544. DOI: 10.3389/fphys.2024.1496544
4. Gordji-Nejad A, Matusch A, Kleedörfer S, et al. Single dose creatine improves cognitive performance and induces changes in cerebral high energy phosphates during sleep deprivation. Scientific Reports. 2024;14:4937. DOI: 10.1038/s41598-024-54249-9
5. Smith-Ryan AE, Cabre HE, Eckerson JM, Candow DG. Creatine in women's health: bridging the gap from menstruation through pregnancy to menopause. Journal of the International Society of Sports Nutrition. 2025;22(1):2502094. DOI: 10.1080/15502783.2025.2502094
6. Candow DG, Forbes SC, Kirk B, Duque G. Current evidence and possible future applications of creatine supplementation for older adults. Nutrients. 2021;13(3):745. DOI: 10.3390/nu13030745
7. Delpino FM, Figueiredo LM, Forbes SC, et al. The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Frontiers in Nutrition. 2024;11:1424972. DOI: 10.3389/fnut.2024.1424972
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9. Lim WS, Cheong CY, Lim JP, et al. Singapore Clinical Practice Guidelines For Sarcopenia: Screening, Diagnosis, Management and Prevention. Journal of Frailty & Aging. 2022;11:348-369. DOI: 10.14283/jfa.2022.59
10. de Souza E Silva A, Pertille A, Reis Barbosa CG, et al. Effects of creatine supplementation on renal function: a systematic review and meta-analysis. Journal of Renal Nutrition. 2019;29(6):480-489. DOI: 10.1053/j.jrn.2019.05.004
11. Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Journal of the International Society of Sports Nutrition. 2017;14:18. DOI: 10.1186/s12970-017-0173-z
12. Deutz NEP, Bauer JM, Barazzoni R, et al. Protein intake and exercise for optimal muscle function with aging: Recommendations from the ESPEN Expert Group. Clinical Nutrition. 2014;33(6):929-936. DOI: 10.1016/j.clnu.2014.04.007
13. Health Promotion Board Singapore. Singapore Physical Activity Guidelines (SPAG). HealthHub; 2022. URL: healthhub.sg