- A question asked by everyone from beginners to the most advanced, as we can find contradictory information on the internet and various sources, which is why we refer to the most recent research to clarify this issue once and for all.
- Studies have systematically shown that creatine supplementation increases intramuscular creatine concentrations, which may help explain the observed improvements in high-intensity exercise performance leading to greater training adaptation.
- These studies demonstrate that both short-term and long-term supplementation (up to 30 g/day for 5 years) is safe and well-tolerated in healthy individuals and in various populations.
- Both athletes and older individuals, or even those suffering from injuries, can use creatine.
Can prolonged use for months or years affect my health?
Research has shown that it is safe to consume creatine daily, even for several years. There is no evidence to support any significantly harmful side effects in people who consume high doses of creatine (30 grams/day), even for up to 5 years.
Should I take breaks regularly?
It is not necessary. However, it can be nuanced. If we are athletes or sportspeople who maintain a regular training scheme, consumption can be continued regularly without any problem.
If, on the other hand, you are going to spend a certain time without exercising due to factors such as vacations, off-season… in such cases, a break can be taken if desired.
What happens if I suddenly stop taking creatine?
The most common experience will be a decrease in strength, endurance, and/or explosiveness, that is, athletic performance. Fatigue or time to exhaustion may also occur more quickly than if we continued taking creatine.
It’s also possible that if you are undergoing a cutting phase, and in most cases, the carbohydrate intake is reduced, so muscle appearance may be compromised.
Creatine causes intramuscular water retention, giving a firmer appearance.
As creatine is directly related to protein synthesis, removing it from the equation can slow down this process. Another aspect that can also be experienced is a slight depression, and this is explained as there are creatine deposits in brain tissue – let’s not forget that creatine has a cognitive effect -.

Should I also take creatine on rest days?
Yes, it is recommended to maintain regular creatine consumption, both on training and rest days. The function of creatine when ingested is to saturate muscle cells. This does not happen immediately, but is a gradual process.
On the other hand, it is said that creatine does not act at the blood plasma level, so:
“If you take creatine before your workout thinking you will enjoy its effects, you are mistaken”.
When do the effects of creatine begin to be noticeable?
Just like with training, whose results are not immediately noticeable, the use of creatine also requires a period to start noticing its effects, to increase cellular availability.
By ingesting creatine, what really happens is that the stores of phosphocreatine, a form of cellular energy, are replenished, contributing to the production of a high-availability energy molecule known as ATP (adenosine triphosphate).
The higher the ATP, the greater the capacity for muscular activity.
Short-term creatine consumption (for example, following a “loading phase”: 20 g/day for 5-7 days) can increase the total creatine content by 10-30% and phosphocreatine reserves by 10-40%.
It is estimated that around 4 weeks is when cellular saturation can be reached and begin to experience the benefits of creatine, starting from a dose of 3 grams per day.
As indicated, athletes sometimes use the known strategy as “loading phase” so that the above process occurs more rapidly.
Conclusion
- Creatine is widely used by elite athletes and enthusiasts as an ergogenic aid to improve anaerobic exercise performance.
- It is also related to speeding up post-injury rehabilitation processes and reducing muscle mass loss during this process.
- Older individuals also use creatine to prevent sarcopenia and, therefore, it may have therapeutic benefits for muscle wasting diseases.
- Its use is completely safe, even doses much higher than recommended, and used for years, without producing unwanted effects.
- The known “loading phase” is not necessary, and one can opt to take the maintenance dose directly.
Recommended Bibliography
- Richard B. Kreider, Douglas S. Kalman, Jose Antonio, Tim N. Ziegenfuss, Robert Wildman, Rick Collins, Darren G. Candow, Susan M. Kleiner, Anthony L. Almada, and Hector L. Lopez. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017; 14: 18. doi: 10.1186/s12970-017-0173-z.
- Eric S Rawson, Mary P Miles, D Enette Larson-Meyer. Dietary Supplements for Health, Adaptation, and Recovery in Athletes. DOI: 10.1123/ijsnem.2017-0340.
- Richard B Kreider. Effects of creatine supplementation on performance and training adaptations. PMID: 12701815.
- E Hultman, K Söderlund, J A Timmons, G Cederblad, P L Greenhaff. Muscle creatine loading in men. DOI: 10.1152/jappl.1996.81.1.232.
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