Creatine and Seniors
At a recent longevity meetup, I met people in their 50s & 60s taking creatine wrong or not at all. Some interesting questions came up. Here is what they should know.
👋 Hi, I’m Shan — co-founder and CEO of Xandro Lab, a Singapore-based longevity science brand. I write about building a company, aging well, and the science that sits between the two.
Last month I was at our regular longevity meetup — a monthly evening hosted by Kamil Pabis, a researcher at NUS, run in collaboration with TSquared Health, a new-age longevity clinic on Robinsons Road. The room is always a good one: people who take their health seriously, read widely, and who care. That evening, Prof Jan Gruber was presenting his work on biological clocks and what they tell us about how we age. It was, as always, worth every minute.
After the talk, I found myself in a cluster of attendees who were mostly in their fifties and sixties. We started talking about supplements — specifically creatine — and what followed was one of those conversations that reminded me why writing about this stuff matters. A few of them were taking it, but inconsistently, 1-5 grams a day. Several had heard that high doses work better for brain but were uncomfortable going higher because of stomach issues. Nobody was confident they were doing it right. And almost all of them had framed creatine in their heads as a gym supplement — something for performance, not for people like them.
That framing is the problem. And it is what this piece is about.
In this post:
What creatine is actually does?
Kidney concern and deficiency perspective
Who benefits most?
Where the science still needs to go
1. What creatine is actually does?
Creatine is not a drug. It is a naturally occurring compound your body makes from three amino acids and also absorbs from food, primarily meat and fish. Your body uses creatine as a rapid energy buffer. When cells need energy fast — whether that is a muscle fibre contracting or a neuron firing — they reach for phosphocreatine to quickly regenerate ATP, which is the actual energy currency of every cell you have.
Think of ATP as the cash in your wallet. Phosphocreatine is the ATM. Without adequate creatine, that system slows — and the tissues that suffer most are the ones with the highest energy demands. The two most demanding organs in your body are skeletal muscle and the brain.
Your body naturally makes about 1 gram of creatine per day and gets another gram from food if you eat meat regularly. As we age, both sides of that equation weaken. Endogenous synthesis slows. Dietary intake often drops as people reduce red meat consumption for cardiovascular reasons or simply eat less overall. Nobody calls this a deficiency in the clinical sense yet. But the functional consequences of running low appear to be real.
2. Kidney concern and deficiency perspective
Before I get into the evidence, let me address the creatinine worry directly, because it came up at the meetup and it comes up constantly.
When you take creatine, your body metabolises it into creatinine as a waste product, and creatinine is what doctors measure in a blood test to assess kidney function. So when someone on creatine supplementation shows slightly elevated creatinine, their doctor may flag it. This has caused enormous confusion over the years and led many people — including several of the people I was speaking to — to quietly stop taking it.
Here is what the research actually says - elevated serum creatinine in someone supplementing creatine does not indicate kidney damage. Instead, it indicates that their creatine metabolism is higher than average, which produces more creatinine as a byproduct. Studies following healthy individuals on creatine for years, including older adults, have found no evidence of impaired kidney function.
If there is pre-existing kidney disease, that is a different conversation and you should consult your doctor.
For a healthy person in their fifties or sixties with normal renal function, creatine at sensible doses (up to 5 grams daily) is not a kidney risk. The creatinine elevation on your bloodwork is a measurement artefact of supplementation, not a warning sign.
Now, on dosing. The stomach discomfort that some people experience is real but avoidable. It almost always comes from taking a large dose all at once on an empty stomach. Splitting the dose across the day, taking it with food, and staying well hydrated eliminates most of it. There is no benefit to taking more than five grams a day in a single sitting regardless of your goals.
On to the deficiency question. A large study using data from the US National Health and Nutrition Examination Survey — one of the most rigorous population health datasets in the world — found that older adults over sixty who consumed more than about one gram of dietary creatine per day scored meaningfully higher on cognitive tests measuring processing speed than those below that threshold. The association held after adjusting for education, income, and nutritional variables.
A separate NHANES analysis across over 22,000 adults found that those in the lowest quartile of dietary creatine intake had depression rates nearly 2x those in the highest quartile. The protective association was strongest in women and in adults not on antidepressant medication. These are observational findings, so they show correlation rather than proven cause. But the biological mechanism is coherent and the signal is consistent across different data waves.
Your brain accounts for around 2% of your body weight but consumes about 20% of your total energy at rest. Neurons depend on a steady ATP supply to support memory, mood, attention, and executive function. The phosphocreatine system is central to maintaining that supply during high-demand moments — stress, poor sleep, complex cognitive tasks. As brain energy metabolism slows with age, the buffer that creatine provides becomes more important, not less. And yet we routinely screen older adults for Vitamin D and B12 deficiency while barely thinking about creatine insufficiency. That gap is worth closing.
3. Who benefits most from creatine?
Not everyone is at equal risk of running low. A few groups stand out clearly in the literature.
Older adults who have reduced meat intake are the most obvious. Creatine in the diet comes almost entirely from animal sources. If you have cut back on red meat for cardiovascular reasons, or your appetite has declined, your dietary creatine may have dropped without anyone noticing.
Vegetarians and vegans have dietary creatine intake close to zero. The body compensates by synthesising its own supply, and interestingly, brain creatine levels in vegetarians are often comparable to omnivores for this reason — the brain is largely independent of dietary intake. But that same independence means supplementation can produce a stronger response. Their system is more sensitive to any exogenous increase. A modest daily supplement could make a meaningful difference here, at very low cost.
Women navigating perimenopause and menopause represent an emerging area of interest. Estrogen appears to play a role in stimulating creatine synthesis and uptake in neural tissue. As estrogen declines, some researchers are beginning to ask whether part of the cognitive fog and mood disruption many women experience during this transition reflects reduced brain energy availability — and whether creatine could help buffer that.
People under sustained cognitive or metabolic stress — caregivers, people managing chronic illness, those sleeping poorly — also appear to benefit more. Several studies show creatine’s cognitive effects are strongest when the brain is under energetic strain. The stressed aging brain upregulates creatine uptake.
This means that if you are a 60-year-old managing a busy life on poor sleep, creatine may matter more to you than it does to the 25-year-old taking it at the gym.
4. Where the science still needs to go
I want to be honest about the limits of what we know.
The clinical evidence base for creatine and brain health in seniors is real but earlier-stage than the muscle literature. But this is my interest and something I am working towards to build.
The RCTs are fewer. The question of optimal dose for brain benefit specifically — as distinct from muscle — is not fully settled. Current evidence suggests you probably need at least 5 grams per day consistently over weeks to meaningfully raise brain creatine levels. The one gram that came up in the meetup conversation, taken inconsistently, is unlikely to produce a detectable cognitive effect. It may have some value simply as a buffer against baseline insufficiency, but it is below what the brain-focused trials have used.
What the field needs is what muscle research had: properly powered clinical trials with brain-specific endpoints, to actually measure brain creatine changes across different doses, in stratified populations — by diet, sex, hormonal status, age, and baseline intake. That research is underway in various labs but is a decade behind where the muscle science sits.
Here is what I keep coming back to though. Creatine monohydrate costs almost nothing. Two kgs of it — roughly a year’s supply at five grams a day — costs less than a single specialist doctor visit. Its safety profile across decades of human research is excellent. For the vast majority of older adults with healthy kidney function, it is safe, affordable, and practically simple to take.
We recommend calcium for bone. Magnesium for sleep. Vitamin D for immunity and mood. All built on population-level evidence that most older adults are insufficiently supplied and that supplementation helps. The creatine evidence for seniors is not yet at that same consensus level, but the direction is consistent and the cost of acting is extremely low.
That shift — from thinking of creatine as a gym supplement to thinking of it as a longevity nutrient for older adults — is worth making now, not after another decade of trials.
If you are in your 50s or 60s, eating little meat, or navigating the cognitive and physical demands of aging, creatine is worth a conversation with your doctor. It might be the most overlooked and most affordable lever in how we think about aging well.
References
Kreider RB 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.
Buford TW et al. International Society of Sports Nutrition position stand: creatine supplementation and exercise. Journal of the International Society of Sports Nutrition. 2007;4:6.
Ostojic SM et al. Dietary creatine and cognitive function in U.S. adults over 60 years. Aging (Albany NY). 2021.
Bakian AV et al. Dietary creatine intake and depression risk among U.S. adults. Translational Psychiatry. 2020;10:52.
Solis MY et al. Brain creatine depletion in vegetarians? A cross-sectional ¹H-MRS study. British Journal of Nutrition. 2014;111(7):1272–1274.
Smith-Ryan AE et al. Creatine supplementation in women’s health: a lifespan perspective. Nutrients. 2021;13(3):877.
Shan is the co-founder and CEO of Xandro Lab, a Singapore-based longevity science brand. Xandro makes science-backed supplements for people who want to age aggressively.