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Creatine is one of the most studied dietary supplements in the field of sport. Its effectiveness in improving performance during short and intense efforts is now well documented.
In recent years, researchers have also become interested in its potential role in other areas, including muscle health, aging, cognitive functions… and certain situations of persistent fatigue.
Can creatine really help in cases of chronic fatigue? The answer requires some nuance.
What is chronic fatigue?
Fatigue is a common symptom that can have many origins: lack of sleep, stress, intensive training, inadequate diet, illness, or certain nutritional deficiencies.
It is important to distinguish between temporary fatigue and chronic fatigue.
The latter refers to persistent fatigue, present for several months, which does not completely disappear with rest and can have a significant impact on quality of life.
Its causes are numerous and always require a medical evaluation to identify its origin.
Why are researchers interested in creatine?
Creatine is naturally present in muscles and, to a lesser extent, in the brain.
Its main role is to participate in the rapid regeneration of ATP, the primary energy source used by cells.
By increasing phosphocreatine reserves, creatine supplementation can improve energy availability during certain efforts.
This mechanism has led researchers to question its potential interest in situations where the production or use of cellular energy might be impaired.
What the studies show
Most scientific work on creatine focuses on athletic performance.
However, some studies have explored its use in different contexts associated with significant fatigue, particularly in certain clinical populations or in people suffering from chronic diseases.
The results sometimes suggest an improvement in certain parameters, such as:
- muscle strength;
- the ability to perform certain efforts;
- the sensation of fatigue in some populations.
However, the results remain variable depending on the studies and situations examined.
Is creatine effective against chronic fatigue syndrome?
To date, scientific data are insufficient to conclude that creatine is a treatment for chronic fatigue syndrome (also known as myalgic encephalomyelitis).
A few exploratory works have shown encouraging results on certain markers or physical capacities, but the sample sizes are often small and the protocols very heterogeneous.
Current medical recommendations therefore do not consider creatine as a standard treatment for this pathology.
In cases of persistent fatigue, it is essential to seek the cause with a health professional rather than hoping that a dietary supplement alone will solve the problem.
For athletes: a help against fatigue?
For athletes, the situation is different.
Creatine is known to improve performance during short, repeated, and high-intensity efforts.
By facilitating ATP resynthesis, it can also:
- delay muscle fatigue during certain exercises;
- promote the maintenance of performance over a series of repetitions;
- improve recovery between close efforts.
However, this is fatigue related to physical exercise, and not chronic fatigue in the medical sense of the term.
Who could benefit from it?
Creatine supplementation is mainly relevant for:
- athletes practicing strength or power disciplines;
- people performing high-intensity intermittent efforts;
- certain elderly individuals, as part of a muscle strengthening program.
Regarding chronic fatigue, research is still ongoing and does not allow these benefits to be extended to all affected individuals.
Current limitations of knowledge
Creatine is probably one of the most studied dietary supplements in sports nutrition, but that doesn't mean it's effective in all situations.
Regarding chronic fatigue:
- there are still few studies;
- the populations studied are very different;
- protocols vary greatly;
- results sometimes remain contradictory.
Further research is therefore needed before specific recommendations can be established.
What to remember
Creatine has solidly demonstrated effectiveness in improving performance during short and intense efforts. However, its interest in chronic fatigue is still under investigation.
Some studies suggest interesting potential in certain situations, but the available evidence remains insufficient to consider creatine as a solution against chronic fatigue or chronic fatigue syndrome.
In the presence of persistent fatigue, the priority remains to identify its cause. Creatine may have its place in specific contexts, but it does not replace a medical diagnosis or appropriate treatment.