Hydratation et performance cérébrale

Hydration and brain performance

Jan 31, 2024

It is of paramount importance to pay special attention to your hydration.


The Influence of Hydration on Cognitive Health

Brain function is highly dependent on how hydrated your body is. Even minor dehydration, as little as 2%, can impact your ability to perform mental tasks. Did you know that your brain is made of 75% water? This is an incredible statistic to consider. Water is an essential component of brain cells and is necessary for the optimal functioning of neurotransmitters, which play a key role in thinking, learning and memory processes.

Water is also crucial for oxygen delivery to the brain. In fact, around 20% of the total oxygen consumed by the body is used by the brain. Adequate hydration therefore optimizes oxygen supply and, consequently, improves brain performance.

Think of water as a kind of “fuel” for your brain. Without fuel, your car doesn't run. Likewise, without sufficient hydration, your brain does not function optimally. It is therefore essential to stay hydrated, not only for your general health, but also for your cognitive health.


Symptoms of brain dehydration

Your brain can suffer from dehydration long before you start to feel thirsty. It is therefore imperative to recognize the subtle symptoms of brain dehydration.

One of the most common signs of brain dehydration is a decrease in cognitive abilities. You may have difficulty concentrating, thinking clearly, or remembering new information. Mental slowness is another sign that should not be overlooked. If you feel slower in your thoughts or have trouble reacting quickly, it could be a sign of dehydration.

Headaches are often associated with dehydration. If you have a headache that doesn't get better despite rest and medication, dehydration may be the cause. Irritability, sleepiness, and a general drop in mood can also be warning signs.

Knowing how your body responds to dehydration can help you maintain optimal brain health. This is why it is essential to be alert to these symptoms and never underestimate the value of water for your overall well-being.


Practical advice to optimize brain hydration

Water: It is the purest source of hydration. The goal should be to consume a minimum of 2 liters of water per day. It may be helpful to carry a water bottle with you to monitor your intake. Don't wait until you're thirsty to drink. At this point, your body may already be in a state of moderate dehydration.

Hydrating foods: Certain foods have a particularly high water content and can contribute to your hydration. Think for example of cucumbers, watermelons and oranges.

Avoid alcohol and caffeine: Both of these substances have diuretic properties, meaning they help the process of eliminating water from your body. If you can't go without your morning cup of coffee, make sure to drink even more water to compensate.

Listen to your body: Every individual has different hydration needs. Learn to know your body's signs of dehydration and respond accordingly. If you're feeling tired, have a headache, or have a dry mouth, it might be time to drink a glass of water.



Always remember that hydration should not be neglected because it plays an undeniable role in the performance and health of your brain. Proper hydration helps optimize concentration , memory and other cognitive aspects while minimizing the risk of neurological disorders. Don't ignore the signs of dehydration and be sure to follow the recommendations for optimal hydration. Water every day, for a healthy brain, it's that simple!

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