- Creatine is one of the most well‑researched and effective supplements in sports nutrition, best known for its ability to increase strength, muscle mass and performance during short bursts of intense activity.
- In recent years, interest has expanded beyond its athletic benefits, with studies exploring its potential role in brain and bone health, and its usefulness in preventing sarcopenia in older adults.
- Although its effects are well established, the optimal timing of supplementation remains a topic of debate. The question persists: is it better to take creatine before training, after training, or simply at any time of day?
What is creatine?
Creatine is a naturally occurring compound that plays a vital role in energy metabolism, particularly during short, high‑intensity physical effort. Around 95% of the body’s creatine is stored in muscle tissue, most of it in the form of phosphocreatine. This system acts as a rapid energy reserve, helping regenerate ATP (adenosine triphosphate) – the molecule that fuels nearly all cellular processes, including muscle contraction.
Put simply: during intense exercise, sprinting, or strength training, ATP is quickly depleted, and phosphocreatine helps restore it. This allows performance to remain stronger, longer and more efficient. Supplementing with creatine therefore supports explosive strength, aids recovery, and can increase overall training volume.
The body produces creatine itself, but not enough on its own
The body can synthesise creatine from the amino acids arginine, glycine and methionine, mainly in the liver, kidneys and pancreas. However, a portion of creatine is naturally broken down each day into creatinine, which is excreted in urine – meaning our stores must be continually replenished.
Exogenously (i.e., through diet), we obtain creatine mainly by consuming animal products, especially red meat and fish. For instance, 500g of beef contains roughly 2–3g of creatine. Because of this, vegetarians and vegans typically have lower baseline creatine levels in their muscles, making supplementation potentially even more effective for them than for those who eat a mixed diet.
Creatine monohydrate: the proven standard
Among all the creatine forms available on the market, creatine monohydrate remains the most thoroughly researched and the most widely recommended. It offers excellent bioavailability, a strong safety profile, and repeatedly demonstrated effectiveness in clinical studies. It is also stable, affordable and easy to use.
Although newer forms, such as creatine hydrochloride, creatine ethyl ester, or buffered creatine, continue to appear, none have consistently shown greater efficacy than monohydrate. If you want a form backed by the strongest scientific evidence, creatine monohydrate is the most reliable choice.
Proven benefits of creatine
Over the past few decades, creatine has expanded from a supplement mainly associated with athletes to one with a wide range of scientifically supported effects. Its most significant benefits are backed by dozens of randomised controlled trials and multiple meta‑analyses.
Evidence‑based effects
Increases strength and muscle mass\The best‑documented benefit of creatine is its ability to enhance muscle strength and increase muscle mass, particularly when paired with resistance training. Meta‑analyses show that creatine supplementation leads to 1–1.5kg more muscle gain on average compared with training without creatine. It also results in greater improvements in maximal strength in both the upper and lower body.
These benefits apply not only to young, active individuals but also to older adults, where creatine may help in the prevention of sarcopenia (age‑related loss of muscle mass).
Improves performance during short, intense bursts of exerciseCreatine supports the rapid resynthesis of ATP through the ATP–CP energy system, which powers explosive activities lasting up to around 10 seconds, such as sprinting or weightlifting. It is under these conditions that creatine supplementation is most effective.
Potential effects (with weaker or preliminary evidence)
Cognitive function and brain healthResearch in recent years shows that creatine may increase phosphocreatine levels in the brain as well. Higher levels are associated with improved cognitive function (especially under demanding conditions, such as sleep deprivation and hypoxia) and potential protection against neurodegenerative diseases.
While the increase in brain creatine is well established, the evidence for improvements in mental performance is still inconsistent and depends on factors such as population type, dosage, and duration of supplementation. Overall, it appears that higher daily doses may be required to achieve cognitive benefits.
Bone healthIn older adults, there is evidence that combining creatine supplementation with resistance training may improve bone mineral density and bone tissue metabolism. However, studies are inconsistent, and the doses required for these effects tend to be higher (≥8g/day).
Sleep deprivation
One particularly interesting and practical potential benefit of creatine is its effect on cognitive performance during sleep deprivation. A recent study found that a single dose of 100mg/kg of creatine monohydrate (roughly 7–8g for a 70kg adult) resulted in:
- improved short‑term memory,
- greater accuracy in cognitive tasks (e.g., reaction time),
- and an increased phosphocreatine/ATP ratio in the brain, indicating greater cellular energy availability in the central nervous system during sleep‑related stress.
This effect is especially relevant for people who frequently experience irregular sleep patterns, such as night‑shift workers or athletes travelling across time zones, suggesting that creatine may serve not only as a sports supplement but also as cognitive support.
Creatine dosing: how much should you take?
To get the most out of creatine supplementation, it’s important to consider not only when you take it but also how much. There are two main dosing strategies: the classic approach with a loading phase, and gradual daily dosing without loading. Both are effective, but they differ in how quickly creatine stores in the muscles become saturated.
Classic approach: with a loading phase
- Loading phase: 20g of creatine per day (divided into four doses of 5g) for 5–7 days.
- Maintenance phase: Followed by 3–5g per day.
This method increases muscle creatine stores by 20–40% within a week, leading to a faster onset of benefits such as improved strength and increased muscle volume.
Gradual supplementation: without loading
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A consistent dose of 3–5g per day without an initial loading phase.
Using this approach, muscles reach full creatine saturation in approximately 3–4 weeks. Although it takes longer to achieve maximum levels, the long‑term effects are equivalent to the loading method.
Individual dosing
People respond to creatine differently, so some experts recommend dosing based on body weight:
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0.1 g per kg of body weight per day (e.g., 7g for a 70kg individual).
This approach may be particularly useful for older adults and individuals with higher body weight.
It’s also worth noting that some people – known as “non‑responders” – experience minimal benefits from supplementation. These are often individuals who already have naturally high creatine levels stored in their muscles.
When is the best time to take creatine? The timing debate
Although the effectiveness of creatine in improving strength, muscle mass and performance is firmly established, the question of optimal supplementation timing remains controversial. Several theoretical mechanisms suggest that taking creatine close to training may enhance absorption and effectiveness. However, randomised studies to date show mixed results.
Theoretical reasons why timing matters
Increased blood flow (hyperaemia)
During exercise, blood flow to the muscles increases dramatically by as much as 100‑fold. If creatine is circulating in the bloodstream during this window, it may be transported into muscle tissue more efficiently. Because blood creatine levels peak 1–2 hours after ingestion and remain elevated for 3–4 hours, this mechanism theoretically supports taking creatine before training.
Activation of the Na⁺/K⁺ pump (sodium‑potassium pump)
Creatine is transported into muscle cells via the sodium‑creatine cotransporter, whose activity increases during exercise. Long‑term physical training also appears to enhance this transporter’s function.This suggests a potential benefit to taking creatine before or immediately after training, when uptake mechanisms are most active.
Insulin and creatine absorption
Creatine is better absorbed when taken with a meal containing carbohydrates and/or protein. Insulin stimulates the sodium‑potassium pump and cellular creatine uptake. For this reason, creatine should be taken with a post‑workout meal or protein shake (protein + creatine).
Studies suggesting a benefit to taking creating after training
Antonio & Ciccone (2013)This study examined the effects of 5g of creatine taken either immediately before or after resistance training in recreationally trained men. After four weeks, both groups improved in strength and body composition, but the post‑workout group achieved slightly greater increases in lean body mass and strength. The authors suggested that the post‑exercise environment may be more favourable for creatine uptake.
Candow et al. (2015)This is the only study to include a placebo‑controlled group in older, untrained adults. Participants received creatine (0.1 g/kg/day) either before or after training for 32 weeks. The group taking creatine after training saw significantly greater gains in lean body mass than the placebo group, while the pre‑workout group did not differ from placebo. This may indicate a modest advantage of post‑exercise supplementation for muscle mass.
Studies that found no difference between before and after
Forbes et al. (2021)Participants trained one limb (arm and leg) with creatine taken before training, and the opposite limb with creatine taken after training. After eight weeks, there were no differences in muscle mass or strength between limbs. This supports the idea that timing has only a minimal effect, as long as creatine is taken consistently.
Candow et al. (2014)
In this 12‑week study on healthy, previously untrained older adults, creatine supplementation (0.1 g/kg/day) taken before vs. after training resulted in no significant differences between groups.
Important limitations in the research
Although most studies show that both pre- and post‑workout creatine can support positive training adaptations, none provide conclusive evidence that timing itself is a decisive factor. The research is limited by several common issues:
- No measurement of intramuscular creatine levels before and after supplementation.
- Uncontrolled dietary intake, especially creatine obtained from meat.
- Lack of sex‑specific analyses, despite the possibility that women may have higher baseline muscle creatine levels.
- No consideration of the menstrual cycle in studies involving women, which may influence results.
Practical recommendations for creatine use
Based on current scientific evidence, creatine is a highly effective supplement regardless of the exact timing of ingestion. However, certain strategies may support better absorption and utilisation—particularly in people with naturally lower baseline creatine levels (such as vegetarians or older adults) or during a loading phase. Below are practical, easy‑to‑follow recommendations.
Consistency matters more than timing
The main factor for saturating muscle creatine stores is regular daily use (e.g., 3–5 g per day). It appears that dosing every other day may also be sufficiently effective. However, the main thing is consistency and long‑term use. If you do not always take creatine at the same time, nothing major will happen – the important thing is not to skip a dose.
Best time: near your training session
If you exercise, it is recommended to take creatine close to your workout, either:
- before training, ideally 60–90 minutes beforehand, or
- after training, together with a meal or a protein/carbohydrate drink.
This may support absorption due to increased blood flow and the effect of insulin.
Take creatine with food
Creatine is absorbed more effectively when consumed with a meal containing carbohydrates and/or protein. If you train on an empty stomach or don’t eat immediately after your session, consider pairing creatine with a pre‑workout meal or a small carbohydrate–protein drink to support uptake.
In older adults: dosing and timing
Older adults may respond to higher doses (e.g., 0,1 g/kg daily). Supplementation in combination with training is key, as creatine alone without physical activity has limited effects.
During sleep deprivation
In situations where you are sleep‑deprived or under psychological stress, a single dose of creatine (e.g., 100 mg/kg) may have a positive effect on cognitive performance. It is recommended to take the dose with water or a carbohydrate drink about 1–2 hours before mental performance.
To be safe: avoid taking creatine and caffeine together
Some older studies suggest that acute caffeine intake (typically >3 mg/kg) may partially reduce the positive effects of creatine on muscle strength, possibly due to effects on muscle relaxation or interactions at the level of calcium regulation in muscle cells. More recent research does not consistently confirm this negative interaction. It appears that with long‑term creatine supplementation, caffeine has minimal impact as long as the two are not takenat the same time. To be safe, it is recommended to take both substances at different times (e.g., creatine after training, caffeine before training or in the morning).
Bottom line
Creatine is among the most thoroughly researched and effective dietary supplements in sports nutrition. Its benefits for muscle mass growth, improved strength performance and increased physical performance during short, intense activities are supported by dozens of high‑quality studies. In addition, knowledge is expanding about its potential effects on cognitive function, resilience to sleep deprivation and even bone and brain health, especially in older adults.
When it comes to timing, theoretical arguments support taking creatine close to training—either before or after. Some studies show a slight advantage for post‑workout supplementation, while others find no difference. The strongest evidence points to long‑term consistency as the most important factor.
