Creatine After 45: What the New Research Actually Says
Creatine has somehow become both one of the oldest supplements in the gym and one of the hottest topics in fitness again.
For decades, the basic message was pretty simple: creatine can help you perform repeated high-intensity efforts, train harder, and potentially gain more strength and muscle over time. Now the conversation has expanded. Creatine is being discussed for healthy aging, muscle preservation, body composition, cognition, and even possible benefits for people who aren’t exercising.
That last part deserves a closer look.
A new 2026 study involving adults ages 45 to 65 found improvements in lean tissue, strength, muscular endurance, and selected measures of cognition among some participants taking creatine, including people who weren’t following the study’s structured exercise program.
That’s interesting research. But it doesn’t mean creatine suddenly replaces the gym.
When I look at a supplement as a coach, I’m less interested in whether it produced a statistically significant result somewhere in a research paper. I want to know where it fits into the bigger picture. Can it support strength, muscle, recovery, or long-term capability? Just as important, what can’t it do?
With creatine, that distinction matters.
What the New 2026 Study Found
Researchers at Texas A&M studied healthy, sedentary adults between 45 and 65 for 12 weeks. Sixty-four participants completed the trial, with an average age of about 55.
There’s an important detail in how the study was designed. Participants first chose whether they wanted to participate in an exercise-and-diet program or remain in a non-exercise condition. Within those groups, they were then randomly assigned to receive either creatine monohydrate or a placebo.
The creatine groups took 10 grams per day, divided into two 5-gram servings.
Participants in the exercise group followed a program that included resistance and cardiovascular training along with a calorie-controlled diet. Researchers measured body composition, strength, muscular endurance, blood markers, and several measures of cognitive function.
The headline-grabbing finding was that creatine supplementation without the structured exercise program increased DXA-measured lean tissue by about 1.1 kilograms over 12 weeks. Researchers also reported improvements in strength, muscular endurance, and selected cognitive measures.
Participants combining creatine with exercise and dietary changes also increased lean tissue while improving strength and endurance, and they experienced a greater reduction in body-fat percentage.
So the obvious question becomes: Do you actually need to exercise for creatine to work?
Do You Need to Exercise for Creatine to Work?
Creatine can affect the body whether you exercise or not. Supplementation increases available creatine and phosphocreatine in tissues, helping cells regenerate ATP, the energy used rapidly during demanding activity.
So it isn’t surprising that creatine could produce measurable effects without a formal exercise program.
What we shouldn’t conclude is that taking creatine produces the same benefits as resistance training.
The 2026 study wasn’t designed to prove that. Participants selected whether they would exercise, so exercise versus non-exercise wasn’t randomized. Those groups could have differed in motivation, lifestyle, dietary behavior, or other factors before the intervention even started.
It was also a relatively small 12-week study. The authors noted limitations involving sample size, duration, compliance, and the large number of outcomes measured. They described individual cognitive and metabolic findings as exploratory.
That matters because we already have a much larger body of evidence showing that creatine works particularly well when paired with resistance training.
A 2025 meta-analysis involving 20 studies and more than 1,000 older adults found that adding creatine to exercise produced greater improvements in one-repetition maximum strength than exercise with placebo. Earlier reviews have also found additional benefits for lean mass and strength when creatine is combined with resistance training.
That’s where I’d keep the emphasis.
Creatine may provide some benefit without structured training, and the evidence is interesting enough to continue studying. But if your goal is to build or preserve muscle, increase strength, and remain physically capable as you age, resistance training remains the foundation.
Creatine supports the work. It doesn’t replace the work.
What About Brain Health?
This is probably the fastest-growing area of the creatine conversation.
Muscle isn’t the only tissue that uses the creatine-phosphocreatine energy system. The brain does too, which has led researchers to study whether supplementation can influence memory, attention, and other areas of cognitive performance.
A 2024 systematic review and meta-analysis involving 16 randomized trials found a modest benefit for memory along with improvements in some measures of attention and processing speed. However, researchers didn’t find a significant improvement in overall cognitive function or executive function. Evidence was considered moderate for memory and lower certainty for several other outcomes.
The new 2026 study adds another interesting piece. Some cognitive and memory measures improved with creatine, but others didn’t.
So I wouldn’t tell someone that creatine has been proven to prevent cognitive decline or protect the brain. We don’t have evidence strong enough to make those claims.
What we can say is that there’s a biologically plausible reason to study creatine for brain function, and the human research is becoming increasingly interesting. Memory currently appears to have stronger support than broad claims about overall cognition.
Creatine, Muscle, and the Scale
Creatine can also create some confusion when people step on a scale.
Supplementation can increase the amount of water stored within muscle, especially early on or during a loading phase. Your body weight may increase slightly as a result.
That isn’t body fat.
It’s also worth understanding what researchers mean when they report increases in “lean tissue.” Tools such as DXA measure lean soft tissue. They don’t directly measure individual muscle fibers, so some early change can reflect increased water within muscle rather than entirely new contractile muscle tissue.
Over time, however, creatine may help you perform more productive training. An extra repetition, slightly more load, or a little more quality volume may not look dramatic during one workout. Accumulated over months, those small improvements can contribute to better training adaptations.
That’s the part that matters most to me as a strength coach.
The Practical Creatine Guide
If you’re considering creatine, you don’t need to make this complicated.
Creatine monohydrate remains the form with the strongest research behind it. There’s little evidence that more expensive alternative forms provide better results.
For most healthy adults, 3 to 5 grams per day is a common maintenance dose.
A loading phase is optional. Traditional loading usually involves about 20 grams per day, divided into several smaller doses for five to seven days. That saturates muscle stores faster, but simply taking 3 to 5 grams daily will also increase stores over several weeks.
The 2026 study used 10 grams daily, but that doesn’t mean everyone over 45 suddenly needs 10 grams. Higher intake is being studied for possible additional effects, including cognition, but the standard daily dose remains well supported for strength and exercise purposes.
Timing isn’t something I’d lose sleep over either. Taking creatine consistently matters more than whether you take it fifteen minutes before training or immediately afterward. Pick a time you’ll remember and make it part of your routine.
Is Creatine Safe?
Creatine monohydrate has one of the stronger safety records among sports supplements when used appropriately by healthy adults.
One source of confusion involves creatinine, a blood marker commonly used when evaluating kidney function. Because creatine is converted into creatinine, supplementation can sometimes modestly raise serum creatinine without necessarily indicating kidney damage.
That doesn’t mean everyone should begin supplementing without considering their individual situation. Anyone with kidney disease, significant health conditions, abnormal kidney-function results, medication concerns, or other medical issues should talk with a qualified healthcare professional before using creatine. The same applies during pregnancy or whenever routine supplementation may fall outside the situation of a generally healthy adult.
The Four Pillar Fitness Perspective
Creatine fits well within the Four Pillars, but it belongs in a supporting role.
Under Strength, it may help improve training performance and support gains or preservation of lean tissue. From a Nutrition perspective, it’s one of the relatively few supplements backed by a substantial research base, but it doesn’t replace sufficient protein, calories, or nutrient-dense food. Recovery still requires sleep, stress management, and enough time for your body to adapt to training.
And when we talk about longevity, the real goal isn’t simply having more lean mass on a body-composition report. It’s maintaining the strength and physical capacity to keep doing the things you want to do.
That’s also how I approach supplements in my online coaching. We look at the training, nutrition, recovery, and habits first. Supplements can support a good plan, but they shouldn’t become the plan.
Practical Takeaway
Creatine monohydrate remains one of the better-supported supplements available for adults interested in strength, muscle, and exercise performance. The evidence becomes especially relevant as preserving muscle and strength becomes a greater priority through midlife and later life.
The emerging research on cognition and benefits without structured exercise is worth watching, but it isn’t settled science. One new study shouldn’t erase decades of evidence showing how valuable resistance training is.
If you’re a healthy adult considering creatine, 3 to 5 grams of creatine monohydrate daily remains a simple, evidence-based approach. Loading isn’t required, timing doesn’t need to be complicated, and a little early water-weight gain isn’t the same thing as gaining fat.
Most importantly, keep the hierarchy straight: resistance training, good nutrition, adequate recovery, and consistency.
Then creatine.
Have you considered taking creatine for reasons beyond building muscle, such as maintaining strength or supporting healthy aging? What questions do you still have about using it?
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Stephan Earl is a NASM Certified Personal Trainer, Nutrition Coach, and Corrective Exercise Specialist dedicated to helping people build lasting strength and mobility at every age. With a focus on practical, sustainable fitness, he combines science-based training with mindful movement and nutrition.
He's the author of The Four Pillars of Fitness: A Simple, Science-Backed System for Strength and Longevity, which explores how to stay strong, mobile, and energized for life. His mission is to help others move better, feel better, and live fully at every stage of their fitness journey.
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Four Pillar Fitness is built on one clear idea. Strength, Mobility, Nutrition, and Recovery work together to keep you strong and independent at every age. To dive deeper into each pillar, visit 4PFitness.com.
References
Chun, J., Liu, Y., Kibler, G. L., et al. (2026). 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. Journal of the International Society of Sports Nutrition, 23(sup1), 2716273.
Sharifian, G., Aseminia, P., Heidary, D., & Esformes, J. I. (2025). Impact of creatine supplementation and exercise training in older adults: A systematic review and meta-analysis. European Review of Aging and Physical Activity, 22, 17.
Xu, C., Bi, S., Zhang, W., & Luo, L. (2024). The effects of creatine supplementation on cognitive function in adults: A systematic review and meta-analysis. Frontiers in Nutrition, 11, 1424972.
Delpino, F. M., Figueiredo, L. M., Forbes, S. C., Candow, D. G., & Santos, H. O. (2022). Influence of age, sex, and type of exercise on the efficacy of creatine supplementation on lean body mass: A systematic review and meta-analysis of randomized clinical trials. Nutrition, 103-104, 111791.
Antonio, J., Candow, D. G., Forbes, S. C., et al. (2021). Common questions and misconceptions about creatine supplementation: What does the scientific evidence really show? Journal of the International Society of Sports Nutrition, 18, 13.
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