Bcm-95 Curcumin — Why Bioavailability Is Everything
Quick Read Standard curcumin supplements are poorly absorbed by your body because curcumin doesn’t dissolve well in water and is
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Simon Parrott – Vitacuity Ltd
Creatine is best known as a muscle supplement, but emerging research suggests it may also support brain function. Your brain uses enormous amounts of energy, and creatine acts as a backup energy reserve that kicks in when demand is high. Recent clinical trials show creatine improved memory performance compared to placebo, with particularly strong effects in older adults aged 66 to 76. A 2026 trial found that creatine combined with another compound boosted the ability to remember words and retrieve them quickly.
The evidence is most convincing in older adults and in situations where the brain is under stress, such as sleep deprivation. Creatine appears less beneficial for younger, well-rested adults. A key limitation is that we still do not fully understand how much creatine actually reaches the brain from supplements, and most studies have been relatively small. The European Food Safety Authority rejected a health claim for creatine and cognition in 2024, finding the evidence not yet strong enough for a universal claim.
Creatine monohydrate is safe and inexpensive, with decades of safety data from sports science. If you are over 45, vegetarian, or concerned about maintaining memory and brain energy, a dose of 5 to 10 grams daily offers a low-risk option with a credible but unproven case for supporting brain function. More large, long-term trials are needed, particularly in older adults and in people with cognitive decline.
Verdict: Creatine shows a promising signal for memory support in older adults, but the evidence remains incomplete and stronger research is needed before firm recommendations can be made.
You probably think of creatine as something athletes keep in their gym bags, a muscle supplement, full stop. What if that’s only half the story? What if the same compound quietly powering your biceps during a workout is also doing something interesting inside your skull? And what if the most surprising finding isn’t about strength at all, but about the speed at which you can pull a word or a memory back out of your brain?
Vitacuity has reviewed over 1.77 million research papers to bring you the most relevant science on this topic. What we found is genuinely intriguing, but also genuinely complicated. Creatine and cognitive function is one of those areas where the research is real, the mechanism is plausible, the results are mixed, and the honest answer is: *we’re getting warmer, but we’re not there yet.* Let’s dig in.
Here’s what most people don’t realise: your brain is one of the most energy-hungry organs in your body. Despite making up only about 2% of your body weight, it consumes roughly 20% of your body’s total energy at rest. And unlike your muscles, it can’t take a break.
Your brain runs almost exclusively on adenosine triphosphate (ATP), the universal energy currency of the body. When neurons fire rapidly, ATP gets used up fast. This is where creatine steps in. Creatine, stored in the brain as phosphocreatine, acts as a rapid-response energy buffer: when ATP drops, phosphocreatine donates a phosphate group to replenish it almost instantly, keeping neurons firing [4].
Think of phosphocreatine as a backup generator. The moment the lights flicker, it kicks in. For cognitive tasks, particularly ones involving speed, working memory, and recall, this buffer system matters. If the brain’s energy supply falters, even briefly, performance dips. Creatine supplementation, the theory goes, tops up this buffer, giving the brain more reserve capacity [5].
There’s also emerging evidence that creatine plays a role in neuroprotection, defending neurons against inflammation and oxidative stress, and in supporting mitochondrial function, the cellular machinery that produces energy in the first place [2]. These are promising mechanisms. The question is whether supplementing with creatine actually raises brain creatine levels meaningfully, and whether that translates into measurable cognitive benefits for real people. As we’ll see, the answer is more nuanced than anyone would like.
Evidence grade: Promising, multiple RCTs exist, but sample sizes are modest and findings are inconsistent across cognitive domains
The strongest evidence for creatine and cognition comes from a 2023 systematic review and meta-analysis published in *Nutrition Reviews* that pooled data from eight randomised controlled trials (RCTs) in healthy individuals [8]. This is the highest-quality evidence design available.
The overall finding: creatine supplementation improved memory performance compared to placebo, with a standardised mean difference (SMD) of 0.29, a small but statistically significant effect (95% CI: 0.04–0.53; p = 0.02) [8]. To put that in plain English: people taking creatine tended to score modestly better on memory tests than those taking a dummy pill.
But here’s where it gets really interesting. When the researchers split the data by age group, the effect in older adults (aged 66–76 years) was dramatically larger: SMD = 0.88 (95% CI: 0.22–1.55; p = 0.009), a medium-to-large effect size. In younger adults (aged 11–31 years), the effect essentially disappeared (SMD = 0.03; p = 0.72) [8].
What does this suggest? That the brain’s natural creatine levels may decline with age, and that older adults, who have more to gain from topping up, respond much more strongly to supplementation. A 2025 systematic review of six studies involving 1,542 participants reached a similar conclusion: five out of six studies (83.3%) reported a positive relationship between creatine and cognition in older adults, particularly in the domains of memory and attention [15].
A 2018 systematic review in *Experimental Gerontology* that examined six RCTs (281 individuals) found that short-term memory and intelligence/reasoning showed the clearest improvement with creatine, while the evidence for other cognitive domains, long-term memory, attention, reaction time, executive function, was conflicted [9].
Evidence grade: Promising, double-blind RCT in 58 adults, but exploratory in design, with some findings only approaching significance
A 2026 double-blind, randomised clinical trial published in the *Journal of the International Society of Sports Nutrition* tested a novel approach: combining creatine monohydrate (CrM) with guanidinoacetic acid (GAA), a compound that the body naturally uses to make creatine and that may raise brain creatine levels more effectively than creatine alone [1][10].
The trial enrolled 58 healthy adults (33 female, average age 35.5 years) across three groups: placebo, GAA alone (2g/day), and GAA + CrM (2g/day GAA + 10g/day CrM) for six weeks. The specific finding on verbal memory stood out: both the GAA group and the GAA + CrM group showed improvements in *delayed verbal episodic recognition memory* and *retrieval speed* compared to placebo [1].
Delayed verbal episodic recognition memory, in plain English, is the ability to hear or read a list of words or a story, wait a while, and then accurately recognise which items you’d encountered before. It’s one of the earliest cognitive abilities to decline with age, and it’s closely linked to everyday memory function: remembering a conversation, recalling what someone told you, placing a name with a face.
The GAA + CrM combination also showed improvements in perceived stress, sleep quality, and quality of life measures [1]. The reaction time data was also suggestive, the GAA group showed a trend toward faster reactions (-241.8 ms), though this didn’t quite reach statistical significance.
Importantly, the researchers were honest: most cognitive tests were not significantly affected, some findings only approached significance, and there were inconsistencies in the results. The authors were clear that additional research is needed before firm conclusions can be drawn [1]. This is a proof-of-concept trial, not definitive evidence, but it points in an interesting direction.
Evidence grade: Promising, well-designed 12-week RCT in 64 adults aged 45–65, but cognitive findings are exploratory
A 2026 trial published in the *Journal of the International Society of Sports Nutrition* followed 64 adults aged 45–65 (average age 54.5 years) for 12 weeks, randomised to creatine monohydrate (10g/day) or placebo, with and without an exercise and diet intervention [3].
This is particularly relevant for our audience because the participants map closely to the 40–65 demographic most concerned about cognitive maintenance. The trial used dual-energy X-ray absorptiometry (DXA) for body composition and a full battery of cognitive tests at 0, 6, and 12 weeks.
The findings on cognition: creatine supplementation, both with and without exercise, was associated with favourable changes in selected markers of cognitive function and memory [3]. The muscle and strength findings were robust (creatine clearly maintained and built lean tissue), while the cognitive results were described by the authors themselves as exploratory and in need of cautious interpretation.
The reassuring news: supplementation at 10g/day was well-tolerated with no safety concerns [3]. And importantly, cognitive benefits appeared to emerge even without exercise, meaning you don’t need to be hitting the gym for the brain-related effects to potentially occur.
Evidence grade: Promising, small RCT (n not specified in detail) but clean design with sleep deprivation as a controlled stressor
One of the most compelling pieces of evidence for creatine and brain performance comes from a specific scenario: sleep deprivation. A 2007 study examined what happened when participants took creatine (5g four times a day for seven days) versus placebo and were then subjected to 18, 24, and 36 hours of sleep deprivation combined with moderate-intensity exercise [13].
The result: at 36 hours of sleep deprivation, the creatine group performed significantly better on the central executive task (a demanding test of complex cognition and working memory) than the placebo group. The creatine group showed a significant linear improvement throughout the experiment; the placebo group showed no significant improvement [13].
The central executive function involves planning, problem-solving, and managing competing information, precisely the kind of thinking that suffers first when you’re exhausted. The fact that creatine protected this function at the most extreme point of fatigue suggests it may act as a buffer not just against normal cognitive demand, but against the kind of depleted-energy state the brain enters under stress [13].
This aligns with a broader narrative from the 2026 narrative review in *Frontiers in Sports and Exercise Medicine*: creatine shows its clearest cognitive benefits during periods of metabolic stress, sleep deprivation, mental fatigue, and hypoxia, rather than as a general enhancement in well-rested, healthy young adults [5].
Evidence grade: Early stage, single pilot trial (n=20), no RCTs in dementia populations, mostly preclinical data
A 2026 scoping review in *Ageing Research Reviews* identified just one human pilot trial examining creatine in the context of dementia [2]. That trial (n=20) found that high-dose supplementation, 20g/day for 8 weeks, increased brain total creatine by 11% and was associated with improved fluid cognition [2].
An 11% increase in brain creatine levels matters because it demonstrates that supplementation can actually change brain biochemistry in measurable ways. This addresses one of the central questions in the field: does taking creatine by mouth actually raise creatine levels in the brain? (The answer: yes, though the extent depends on dose and duration [4][5].)
The scoping review also noted something important from preclinical animal studies: sex-specific effects emerged, with female animals showing cognitive benefit and males showing a trend toward harm. This was paralleled, at least directionally, by sex-divergent bioenergetic responses in the human pilot trial [2].
This is intriguing and warrants serious attention in future research. But with just one human trial and n=20, we cannot draw any clinical conclusions. What we can say is: there is biological plausibility, a possible signal, and a clear need for properly powered, sex-stratified trials in people with cognitive impairment.
Evidence grade: Promising, published in a peer-reviewed journal but cross-sectional in design (shows association, not causation)
A 2023 study published in *Nutritional Neuroscience* examined the association between dietary creatine intake and visuospatial short-term memory in older adults [6]. The finding: higher dietary creatine consumption was positively associated with better visuospatial short-term memory performance.
This is a cross-sectional study, meaning it’s a snapshot in time, not a controlled trial, so we can’t conclude that eating more creatine caused better memory. People who eat more creatine (from red meat and fish, primarily) may differ from lower-creatine consumers in many other ways. But it adds to a growing picture: in older adults, creatine availability, whether from diet or supplementation, appears to have a meaningful relationship with cognitive performance [6][15].
It would be dishonest not to mention this. In 2024, the European Food Safety Authority (EFSA) evaluated a formal health claim application linking creatine supplementation to improved cognitive function, and rejected it [14].
Their reasoning deserves respect. EFSA found that the acute working memory effect of creatine was only observed at very high doses (20g/day for 5–7 days) and was not seen at lower doses (2.2–14g/day). The effect on response inhibition at 20g/day was an isolated finding. And the evidence for a mechanism by which creatine improves cognition was judged to be weak. They concluded: “A cause-and-effect relationship has not been established between creatine supplementation and an improvement in cognitive function” [14].
This is the appropriate regulatory standard, and it’s set high for good reason. EFSA requires robust, consistent, replicated evidence before a company can make a health claim on a label. The evidence as it stands doesn’t yet meet that bar. That’s an honest assessment.
What EFSA’s decision doesn’t mean, however, is that creatine has no effect on the brain. It means the evidence isn’t yet consistent or strong enough to make a universal claim for all adults at all doses. As the 2026 critical review in *Experimental Physiology* noted, the challenge for the next decade is not identifying new mechanisms, but establishing whether measurable changes in brain bioenergetics translate into meaningful cognitive benefit, especially in older adults or those with compromised cerebral metabolism [4].
Honesty matters here. The creatine-and-cognition field has real gaps, and we’d rather tell you clearly than oversell.
The brain uptake problem. Your brain is protected by the blood-brain barrier, a selective filter that limits what gets in. Creatine does cross this barrier, but not easily, and the extent to which oral supplementation raises brain creatine levels varies between individuals [4][5]. Some people may be “high responders” and others barely respond at all. We don’t yet have reliable ways to identify who responds and who doesn’t without expensive brain scans.
Dose and duration are unresolved. Studies have used doses ranging from 2.2g/day to 20g/day, for durations of 5 days to 24 weeks. High doses (20g/day) may be needed to meaningfully raise brain creatine levels, but most people take 5g/day. Whether lower doses produce meaningful brain effects over longer timeframes is genuinely unknown [8][14].
Sex differences may matter. The emerging signal from preclinical studies that males and females respond differently, with females potentially benefiting more, needs urgent investigation in human trials. The 2026 scoping review explicitly called for sex-stratified trials [2]. Until those exist, we genuinely don’t know whether the cognitive effects differ by sex.
Young, healthy adults appear not to benefit much. Multiple studies and both major systematic reviews found little to no cognitive effect in younger, well-nourished adults [8][9]. The benefit, if real, appears concentrated in older adults or those under metabolic stress.
Most trials are short and small. Even the largest RCT in the literature, 123 participants for 6 weeks [7], found only borderline effects. The 2025 systematic review specifically noted that existing studies were mostly rated “fair” to “poor” on methodological quality [15]. We need longer, larger, better-designed trials.
Dementia evidence is almost entirely preclinical. Despite enormous interest, there are no completed, adequately powered RCTs of creatine in people with dementia [2]. What we have is one small pilot trial and animal studies, biologically plausible but nowhere near clinically definitive.
So where does this leave you, a sensible, informed person in their 40s, 50s or 60s, who wants to do right by their brain without wasting money or being misled?
Here’s what a brilliant, practical friend who had read all this research would actually tell you.
Creatine monohydrate is one of the safest, cheapest and best-studied supplements in existence. Decades of sports science research have confirmed its safety profile comprehensively [7][11]. It’s widely available in the UK, costs pennies per dose, and the muscle, strength and body composition benefits for people over 45 are robust, genuinely strong evidence [3]. You’re not taking a risk here.
For cognitive benefits, the honest picture is: promising, not proven. The meta-analysis finding of a large effect in older adults (SMD = 0.88) [8] is encouraging. The verbal memory finding from the 2026 GAA + creatine trial is interesting [1]. The sleep deprivation data suggests creatine protects cognitive function under stress [13]. The body of evidence trends positive, particularly for memory and particularly in older adults, but it doesn’t yet cross the threshold of “established.”
What dose makes sense? The cognitive effects in trials have used 5–20g/day. For muscle and body composition, 5g/day is well-supported. If cognitive support is a priority, the data suggests higher doses (closer to 10g/day) may be needed to meaningfully raise brain levels [3][5]. Many studies split doses across two servings. This is practical and well-tolerated.
If you’re vegetarian or older, the case is stronger. Vegetarians have lower baseline creatine stores (creatine comes primarily from meat and fish in the diet), and older adults appear to respond more significantly to supplementation [8][9]. If you fall into either category, the risk/benefit calculation tilts further in favour of trying it.
Creatine is not water-soluble in the vitamin sense, it won’t simply be excreted if you take excess. But it is exceptionally safe at normal doses, and kidney concerns at 5–10g/day in healthy adults are not supported by the evidence. If you have existing kidney disease, check with your GP first, that’s a genuine caveat.
The bottom line: if you’re over 45 and interested in cognitive maintenance, creatine monohydrate at 5–10g/day is a low-cost, low-risk supplement with a credible, if not yet proven, case for supporting brain energy, memory, and cognitive resilience under stress. Combined with its well-evidenced benefits for muscle and body composition in midlife [3], the overall value proposition is strong. Think of it as an investment in your brain’s energy infrastructure, one that the research is increasingly, if cautiously, validating.
[1] Effects of six weeks of guanidinoacetic acid supplementation with and without creatine monohydrate on cognitive function and markers of health in healthy adults (2026). DOI: 10.1080/15502783.2026.2711032 | https://pubmed.ncbi.nlm.nih.gov/42730704/
[2] The Cognitive Effects of Creatine Supplementation in Older Adults and Preclinical Models of Dementia: A Scoping Review (2026). DOI: 10.1016/j.arr.2026.103317 | https://pubmed.ncbi.nlm.nih.gov/42668123/
[3] Effects of creatine supplementation with and without exercise and diet intervention on body composition, cognitive function, and markers of health in middle-aged and older adults (2026). DOI: 10.1080/15502783.2026.2716273 | https://pubmed.ncbi.nlm.nih.gov/42578920/
[4] Creatine and cognitive function: Why has physiological plausibility not translated into convincing clinical evidence? (2026). DOI: 10.1113/EP094109 | https://pubmed.ncbi.nlm.nih.gov/42912797/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC13693954/
[5] Creatine Supplementation and the Brain: Have We Put the Cart Before the Horse? (2026). DOI: 10.1080/19390211.2026.2616440 | https://pubmed.ncbi.nlm.nih.gov/41556609/
[6] Association between dietary creatine and visuospatial short-term memory in older adults (2023). DOI: 10.1177/02601060221102273 | https://pubmed.ncbi.nlm.nih.gov/35603861/
[7] The effects of creatine supplementation on cognitive performance, a randomised controlled study (2023). DOI: 10.1186/s12916-023-03146-5 | https://pubmed.ncbi.nlm.nih.gov/37968687/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10647179/
[8] Effects of creatine supplementation on memory in healthy individuals: a systematic review and meta-analysis of randomized controlled trials (2023). DOI: 10.1093/nutrit/nuac064 | https://pubmed.ncbi.nlm.nih.gov/35984306/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9999677/
[9] Effects of creatine supplementation on cognitive function of healthy individuals: A systematic review of randomized controlled trials (2018). DOI: 10.1016/j.exger.2018.04.013 | https://pubmed.ncbi.nlm.nih.gov/29704637/
[11] “Heads Up” for Creatine Supplementation and its Potential Applications for Brain Health and Function (2023). DOI: 10.1007/s40279-023-01870-9 | https://pubmed.ncbi.nlm.nih.gov/37368234/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10721691/
[13] Creatine supplementation, sleep deprivation, cortisol, melatonin and behavior (2007). https://pubmed.ncbi.nlm.nih.gov/17046034/
[14] Creatine and improvement in cognitive function: Evaluation of a health claim pursuant to article 13(5) of regulation (EC) No 1924/2006 (2024). DOI: 10.2903/j.efsa.2024.9100 | https://pubmed.ncbi.nlm.nih.gov/39564533/ | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11574456/
[15] Creatine and Cognition in Aging: A Systematic Review of Evidence in Older Adults (2025). DOI: 10.1093/nutrit/nuaf135 | https://pubmed.ncbi.nlm.nih.gov/40971619/
This article is for informational purposes only and does not constitute medical advice. Food supplements should not be used as a substitute for a varied and balanced diet and healthy lifestyle. If you are pregnant, breastfeeding, taking medication or have a medical condition, consult your doctor before taking any supplement. These statements have not been evaluated by the Food and Drug Administration (FDA) or the Medicines and Healthcare products Regulatory Agency (MHRA). This product is not intended to diagnose, treat, cure, or prevent any disease.
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