Is Creatine Only for Athletes?

Short answer: no. Creatine is best known as a sports supplement, but the research population is much wider than gym users. The most consistent findings outside athletics come from adults over 55 who combine daily creatine with resistance training, where it increases lean mass and strength beyond training alone, and from vegetarians and vegans, who start with measurably lower muscle creatine stores. In the European Union, creatine carries two authorised health claims, and one of them is written specifically for adults over the age of 55. Cognition is an active research area with early and uneven findings, not an established benefit.

Creatine also has an image problem. It sits on a shelf between protein tubs and pre-workout powders, so many people assume it belongs to a lifestyle they do not have. That is a marketing accident, not a scientific one. Creatine is a compound your body already makes, stores mostly in skeletal muscle, and uses to regenerate energy during short, intense effort. Whether that effort is a set of squats or carrying shopping up four flights of stairs, the biochemistry is the same.

What creatine actually does in the body

Your muscles hold a pool of phosphocreatine. During the first seconds of a hard effort, that pool donates a phosphate group to regenerate ATP, the molecule cells spend to do work. A bigger pool means the fast energy system runs a little longer before slower systems take over.

You already produce roughly one to two grams of creatine per day from amino acids, mostly in the liver and kidneys. The rest comes from food, and almost entirely from meat and fish. That single fact explains most of the population differences that follow.

Why the form barely varies in the literature

Nearly every study cited in this article used creatine monohydrate. It is the form with the deepest safety and efficacy record, which is why the International Society of Sports Nutrition position stand treats it as the reference form [1]. Newer forms are marketed as improvements, but they carry a fraction of the evidence. If you want the wider background on why chemical form matters for some nutrients and not others, we covered that in supplement bioavailability.

Adults over 55: the strongest non athletic evidence

This is the part most people do not know. A meta analysis of 357 older adults, average age around 64, found that adding creatine to a supervised resistance training programme of roughly 12 weeks produced significantly greater gains in fat free mass, chest press strength and leg press strength than the same training with a placebo [2]. Fat mass did not change. The effect was on the muscle side of the ledger, which is exactly where it matters as people age.

A later meta analysis looked at how the dose is delivered in aging adults, comparing lower daily intakes with higher ones and comparing protocols with and without an upfront loading phase [3]. The practical takeaway is that a modest daily intake is sufficient; the theatrics of a loading week are optional. We wrote about that separately in do you need a creatine loading phase.

A 2025 expert review pulled the same thread across older adults and clinical research populations, and describes creatine monohydrate as one of the better studied nutritional strategies used alongside training in this age group [4].

Two things deserve emphasis, because they are frequently lost in enthusiastic summaries. First, the training is not optional. In this literature creatine is a multiplier on resistance training, not a replacement for it. Second, this is precisely the scenario the European Union has authorised a claim for: daily creatine consumption can enhance the effect of resistance training on muscle strength in adults over the age of 55, with the beneficial effect obtained at a daily intake of 3 g of creatine, in conjunction with regular resistance training performed at least three times per week for several weeks at an intensity of at least 65 to 75 percent of one repetition maximum [11]. Read that condition list carefully. It describes a habit, not a purchase.

Vegetarians and vegans start lower

Because dietary creatine comes almost exclusively from meat and fish, people who eat neither carry smaller muscle stores. In a controlled trial, vegetarians began with roughly 117 mmol per kg of dry muscle total creatine compared with about 130 in non vegetarians, and during supplementation with weight training they showed a larger increase in total creatine, phosphocreatine, lean tissue and total work than the non vegetarian group [5]. In other words, the further you start from a full tank, the more visible the filling is.

Be careful about how far that is stretched. A 2025 randomised trial in young vegans and vegetarians confirmed that supplementation raises muscle creatine, while noting that the translation into sprint performance remains uncertain in this population [6]. The honest phrasing is that creatine reliably raises stores in people who eat no meat or fish. It is a physiological statement, not a promise about race results.

The cognition question, answered honestly

This section is deliberately editorial. There is no authorised EU health claim for creatine and brain function, so nothing here is a product benefit. It is a description of where the science currently stands.

The starting point is a 2003 crossover trial in 45 young vegetarians who took 5 g per day for six weeks and improved on working memory and on Raven's Advanced Progressive Matrices compared with placebo [7]. Interesting, small, and in a group with low baseline stores.

Since then the picture has become more textured rather than more triumphant. A systematic review of randomised trials in healthy people found only six eligible studies covering 281 individuals; short term memory and reasoning showed possible improvement, while results for long term memory, attention, executive function and reaction time were conflicting, and cognitive task performance in young participants generally stayed unchanged [8]. A meta analysis focused on memory concluded that creatine improved memory measures in healthy individuals, especially in older adults aged 66 to 76 [9]. The most granular recent meta analysis, covering 16 randomised trials and 492 adults, found a significant effect on memory (standardised mean difference 0.31, 95 percent confidence interval 0.18 to 0.44), some effect on attention time and processing speed, and no significant effect on overall cognitive function or executive function, with certainty rated moderate for memory and low elsewhere [10]. That paper has since attracted a published erratum and a published comment, which is a reasonable reminder that this literature is still moving.

Put plainly: the memory signal is real but small, it appears strongest in older adults and in people with low baseline creatine, and it is not a reason on its own to start taking anything. Anyone selling creatine as a brain product is ahead of the evidence.

What about the kidneys?

The most persistent myth about creatine is that it damages kidneys. It comes from a measurement artefact. Creatine spontaneously converts to creatinine, the very marker clinicians use to estimate kidney function, so supplementing can nudge a blood test result without anything going wrong physiologically. A narrative review of the controlled evidence concluded that trials do not support creatine induced kidney impairment in healthy people [12]. A 2025 systematic review and meta analysis quantified it: across the pooled trials serum creatinine rose by a small, statistically significant amount while glomerular filtration rate did not significantly change, which the authors interpret as metabolic turnover rather than renal injury [13].

Two sensible caveats remain. If you have existing kidney disease, or take medication that affects the kidneys, this is a conversation for your doctor rather than a blog. And if you have bloodwork scheduled, tell whoever interprets it that you supplement, so a raised creatinine value is read correctly.

So who is it actually for?

Reading the evidence rather than the packaging, creatine is most defensible for:

• Adults over 55 who do regular resistance training. This is the group with an authorised EU claim and two supporting meta analyses [2][3][11].
• People who eat little or no meat and fish, because their baseline stores are lower [5][6].
• Anyone performing repeated bursts of short, high intensity effort, which is the original authorised claim and includes plenty of people who would never call themselves athletes: interval cyclists, hill walkers, people carrying heavy loads at work, weekend sports players.

It is least compelling for someone who eats plenty of meat and fish, does no resistance or high intensity training, and expects a supplement to change how they feel day to day. In that case the evidence does not promise much, and we would rather say so.

The practical version

The regulatory condition attached to both authorised claims is a daily intake of 3 g of creatine. Research protocols commonly use 3 to 5 g per day as a maintenance intake, and the older adult meta analyses covered that range [3]. Timing is not decisive; consistency is, because the effect depends on saturating a store rather than on an acute dose.

Practical notes that come up repeatedly:

• Take it daily, including on days you do not train. The store is what matters.
• Mix it in enough liquid. Our ultra micronised creatine monohydrate is a single ingredient powder at 5 g per serving, finely milled so it disperses in 200 ml of water without grit.
• Expect a small increase in scale weight early on from water held inside muscle cells. That is normal and is not fat.
• If you already take other basics, creatine slots in without conflict. Many people pair it with a daily magnesium complex, which carries its own authorised claims for normal muscle function and for the reduction of tiredness and fatigue.
• A food supplement is not a substitute for a varied, balanced diet and a healthy lifestyle.

Frequently Asked Questions

Is creatine only useful if I lift weights?

No, but training changes what it can do. The authorised EU claims cover physical performance in successive bursts of short, high intensity exercise, and, for adults over 55, an enhanced effect of resistance training on muscle strength [11]. Both assume physical effort. Without any training stimulus, creatine has far less to act on.

Do vegetarians and vegans need creatine?

Need is too strong a word, since your body synthesises creatine itself. But because dietary creatine comes almost entirely from meat and fish, people who avoid both have lower muscle stores and show a larger increase when they supplement [5].

Is creatine safe for older adults?

It is the population where the non athletic evidence is strongest, and the EU authorised a claim specifically for adults over 55 who train [11]. As with any supplement, if you take prescription medication or have a diagnosed condition, check with your doctor first.

Does creatine improve memory or focus?

There is no authorised EU health claim for creatine and cognition, so we cannot present it as a benefit. The research shows a small effect on memory measures, strongest in older adults and in people with low baseline creatine, and no significant effect on overall cognitive or executive function [8][9][10]. Treat it as an open research question.

Will creatine damage my kidneys?

Controlled evidence in healthy people does not support kidney impairment. Serum creatinine can rise slightly because creatine converts into creatinine, while filtration rate stays unchanged [12][13]. If you have kidney disease, speak to your doctor.

How much should I take, and do I need a loading phase?

The authorised claims are conditioned on 3 g of creatine per day. Research protocols commonly use 3 to 5 g daily, and meta analytic work in older adults suggests a loading phase is not required to reach the benefit [3].

The Bottom Line

Creatine ended up in the sports aisle for historical reasons, not scientific ones. The clearest evidence outside athletics sits with adults over 55 who lift, and with people who eat little or no meat and fish. The cognition story is genuinely interesting and genuinely unfinished, and we would rather tell you that than sell it. Everything else is unglamorous: 3 to 5 g a day, taken consistently, alongside training that gives it something to do.

Sources

1. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. Kreider RB et al., Journal of the International Society of Sports Nutrition, 2017. PMID 28615996.
2. Creatine supplementation during resistance training in older adults: a meta-analysis. Devries MC, Phillips SM, Medicine and Science in Sports and Exercise, 2014. PMID 24576864.
3. Meta-Analysis Examining the Importance of Creatine Ingestion Strategies on Lean Tissue Mass and Strength in Older Adults. Forbes SC et al., Nutrients, 2021. PMID 34199420.
4. Creatine monohydrate supplementation for older adults and clinical populations. Candow DG et al., Journal of the International Society of Sports Nutrition, 2025. PMID 40673730.
5. Effect of creatine and weight training on muscle creatine and performance in vegetarians. Burke DG et al., Medicine and Science in Sports and Exercise, 2003. PMID 14600563.
6. Muscle creatine levels and sprint performance in young adult vegans and vegetarians after 7 days of creatine monohydrate supplementation. Bonne TC et al., Physiological Reports, 2025. PMID 40939139.
7. Oral creatine monohydrate supplementation improves brain performance: a double-blind, placebo-controlled, cross-over trial. Rae C et al., Proceedings of the Royal Society B, 2003. PMID 14561278.
8. Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials. Avgerinos KI et al., Experimental Gerontology, 2018. PMID 29704637.
9. Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials. Prokopidis K et al., Nutrition Reviews, 2023. PMID 35984306.
10. The effects of creatine supplementation on cognitive function in adults: a systematic review and meta-analysis. Xu C et al., Frontiers in Nutrition, 2024. PMID 39070254.
11. Commission Regulation (EU) 2017/672 authorising a health claim made on foods, other than those referring to the reduction of disease risk and to children's development and health, EUR-Lex, 2017 (the creatine and resistance training claim for adults over 55). See also Commission Regulation (EU) No 432/2012 for the physical performance claim.
12. Is It Time for a Requiem for Creatine Supplementation-Induced Kidney Failure? A Narrative Review. Longobardi I et al., Nutrients, 2023. PMID 36986197.
13. Effect of creatine supplementation on kidney function: a systematic review and meta-analysis. Naeini EK et al., BMC Nephrology, 2025. PMID 41199218.

This article is editorial and informational. It is not medical advice. Food supplements should not be used as a substitute for a varied, balanced diet and a healthy lifestyle.