Feeling sluggish, losing muscle, or struggling with brain fog? You might be surprised to hear that a supplement once exclusively for bodybuilders is now being hailed as a potential game-changer for middle-aged muscles, brain health, sleep, and even women's hormonal issues: creatine. But should you jump on the bandwagon? Let's dive into what the science really says, how much to take, and, crucially, who should definitely steer clear.
For years, creatine was the secret weapon of athletes looking to bulk up and boost performance. You'd find it in the gym, not on your TikTok feed. But now, glamorous influencers are touting its benefits for everything from boosting energy and easing menopause symptoms to warding off age-related brain decline. What's changed?
Creatine is a naturally occurring compound composed of three amino acids, the very building blocks of protein. We get it from meat and fish, and our bodies store it in our muscles. There, it plays a vital role in producing quick bursts of energy, perfect for those intense workouts. This is where its reputation for athletic performance comes from.
But here's where it gets interesting. Scientists are discovering that this energy-boosting effect might have much broader applications, helping to preserve bone and muscle strength as we age, combat fatigue, clear menopausal brain fog, and even potentially aid in the treatment of depression and dementia. This raises the crucial question: should everyone be taking creatine?
According to Sammie Gill, a dietitian and spokesperson for the British Dietetic Association, the evidence is mounting. 'There is growing evidence to suggest creatine supplementation alone could help counteract age-related issues such as muscle mass loss and strength,' she states. This is particularly important as we age, because losing muscle mass can dramatically impact quality of life.
One compelling 2022 research review published in the journal Nutrients found that older adults who combined strength training (think chair squats and light weightlifting) with a daily dose of 3-5g of creatine gained, on average, 1.4kg more muscle and up to 8% more strength compared to those who didn't take it. That's a significant difference!
To understand how this works, let's talk about the ATP-CP system. This is the body's fastest and most immediate energy source. ATP, or adenosine triphosphate, is the molecule our cells use for energy. But ATP stores deplete rapidly. Creatine steps in to help recycle ATP, allowing muscles to keep working harder for longer. Think of it as a turbocharger for your muscles.
And this is the part most people miss: this same ATP-CP system also powers our brains, one of the most energy-hungry organs in the body! Creatine acts as a reserve tank, quickly replenishing energy when demand spikes. Sammie Gill explains, 'That may explain its promising effects on cognition, fatigue and recovery from stress.'
Consider a 2019 study published in Psychopharmacology. Ali Gordji-Nejad, a research scientist at Forschungszentrum Jülich in Germany, discovered that a single morning dose of 5g of creatine improved reaction times by a remarkable 10% in healthy adults who had been kept awake all night. Imagine the potential benefits for shift workers or anyone struggling with sleep deprivation!
'Creatine is most effective when cells are under stress, such as during sleep deprivation, fatigue or cognitive disorders,' Gordji-Nejad says. 'It’s comparable to refuelling a car after a long journey.'
And the potential doesn't stop there. Creatine has also shown promise in combating post-viral fatigue, like that experienced after long COVID.
A small 2023 trial found that 4g of creatine a day for six months improved symptoms in people with long COVID. While the trial only involved 12 participants, those taking creatine reported a 20% improvement in energy levels and a 30% reduction in fatigue scores compared to those taking a placebo. MRI scans also revealed measurable increases in creatine levels in their brains and muscles, as reported in the journal Food Science & Nutrition.
Furthermore, early research suggests creatine could play a role in treating Alzheimer's disease, a devastating condition with limited treatment options.
Dr. Matthew Taylor, an assistant professor of neurology at the University of Kansas, led a 2025 pilot study that found patients with early Alzheimer's who took 20g of creatine a day for eight weeks had higher levels of phosphocreatine (the compound that helps brain cells regenerate energy) in their brains. They also showed small improvements on memory and attention tests, as reported in Alzheimer’s & Dementia: Translational Research & Clinical Interventions. This is a very high dosage, and only for research purposes. Do not attempt without explicit medical supervision.
'We are still far from knowing if it is truly helpful for Alzheimer’s, but we believe it should be investigated with larger clinical trials,' says Dr. Taylor, emphasizing the need for further research. He highlights the potential value of a safe and inexpensive supplement given the scarcity of effective Alzheimer's treatments.
Terry McMorris, a professor of sport psychology at the University of Chichester, agrees. He believes creatine's biggest benefit is when the brain is under stress, such as during sleep deprivation. However, he cautions against widespread use for cognitive enhancement in healthy adults, stating, 'I see no point in using it for brain function in healthy adults.'
But here's where it gets controversial... Dosage is a significant unknown. 'Dosage is a massive issue. We do not know what the dosage should be for cognition. It needs more research,' Professor McMorris emphasizes. (Interestingly, he takes creatine himself, crediting it with helping him maintain muscle mass as he ages, alongside regular exercise.)
Scientists are also exploring whether creatine can boost mood, given the brain's heavy reliance on energy. Carmine Pariante, a professor of biological psychiatry at King's College London, explains that brain regions involved in emotion and motivation often experience low fuel levels during depression. The theory is that by replenishing these stores, creatine helps these areas function properly again.
A 2025 study in European Neuropsychopharmacology found that adults receiving cognitive behavioral therapy (CBT) for depression showed greater reductions in symptoms when 5g of creatine was added to their treatment. However, Professor Pariante urges caution, stating, 'The results are encouraging – but early. Creatine should only be used under medical supervision in depression, and people with bipolar disorder must be especially careful.' He notes that, in rare cases, excess energy in the brain can trigger mania.
Furthermore, research suggests creatine may be particularly beneficial for women during menopause, a time of significant hormonal shifts.
A 2021 review of 16 studies on creatine in women concluded that fluctuating estrogen levels throughout life (during puberty, pregnancy, and menopause) affect how much creatine the body can make, store, and use. As estrogen levels decline during menopause, so do creatine levels. This estrogen drop contributes to muscle and bone weakness, increasing the risk of osteoporosis. Low creatine levels may exacerbate this vulnerability, leading to muscle fatigue and reduced bone protection.
The same 2021 review, published in the journal Nutrients, also found that creatine may support cognitive function during menopause, with some trials demonstrating improvements in short-term memory and reaction times. This could be a significant benefit for women experiencing menopausal brain fog.
So, if you're considering creatine, what should you look for in a supplement?
Creatine monohydrate is the most well-researched form and the one used in most clinical studies showing benefits. It's readily available in most supermarkets and online. Experts recommend avoiding unbranded or unlabeled products purchased online. It typically comes as a powder to be mixed with water, juice, or a smoothie once daily. Capsules are also available for those who prefer not to measure powder.
Experts advise avoiding caffeine or high-protein drinks at the same time, as they can slightly delay absorption. Richard Kreider, a professor of exercise and sport nutrition, suggests taking creatine with carbohydrate and protein to enhance absorption.
Bonnie Jortberg, an associate professor of family medicine, highlights that 'females have 70 to 80 percent lower natural creatine stores than men, largely because of lower muscle mass and hormonal changes that affect its production.' She believes a daily dose of 3-5g is beneficial for women. This lower baseline may explain why many women experience more fatigue and slower recovery in midlife compared to men.
A 2023 study in the journal Medicine & Science in Sports & Exercise found that post-menopausal women who took 5g of creatine while engaging in light weight training gained more muscle strength than those who trained without it. Some participants also reported better sleep and improved mood.
A 2025 study in the Journal of the American Nutrition Association reported reduced mood swings during peri-menopause in women who took daily creatine.
However, it's crucial to note that the greatest benefits appear to come from combining creatine with resistance exercise (lifting weights). Several studies have found little to no benefit from creatine when combined with exercises like walking or cycling. A 2021 study in Nutrients found that post-menopausal women who took creatine without engaging in any weight training showed minimal changes in strength or bone health.
On the positive side, creatine is generally considered a safe supplement, even if its benefits aren't dramatic for everyone.
A 2025 review in Frontiers in Nutrition, pooling data from 685 clinical trials, found that side effects were mild and no more common than with a placebo. The most frequent complaints were short-lived bloating, stomach upset, or a slight weight increase due to extra water retention in muscles (needed to store creatine).
'It is amazingly safe,' says Richard Kreider, who led the review. 'Creatine has no negative effect on the kidneys or liver. In fact, data shows that people who consume diets higher in creatine have less kidney and liver issues as they age.' However, he cautions that creatine can interfere with blood test results for kidney and liver function, so individuals with pre-existing kidney or liver disease should always consult their doctor.
Ultimately, Sammie Gill advises managing expectations. 'Don’t expect miracle results. There is a lot of hype surrounding creatine,' she says. 'Whilst it’s an exciting area of research and results so far show promise, it’s not a panacea for good health.'
So, should you consider adding creatine to your routine? The answer, as with most things health-related, is nuanced. The evidence suggests potential benefits for muscle mass, brain function, and hormonal health, particularly for older adults and menopausal women. However, it's not a magic bullet, and it's most effective when combined with a healthy lifestyle, including regular exercise. And this is something to really take into account, as it seems that creatine only really works when combined with weight training. And it is always a good idea to check with your doctor, especially if you have any pre-existing health conditions.
What are your thoughts on creatine? Have you tried it? Do you think the science is compelling enough to give it a shot? Share your experiences and opinions in the comments below!
