Ramadan inside the head… How does fasting reprogram your brain?

With the arrival of Ramadan, the rhythm of daily life changes significantly; mealtimes, sleep and work schedules change, and the pattern of physical and social activity is transformed.

These changes are not limited to the body alone, but also extend to the brain, which is directly affected by changes in energy sources, sleep patterns, and hormones that regulate the biological rhythm.

Therefore, many fasting people frequently ask a question: Does fasting affect concentration and mood? And can the brain become more or less efficient during hours of abstaining from food?

Brain and energy: What happens during fasting?

The brain is one of the body’s most energy-consuming organs; it consumes about 20% of the body’s total energy, even though its weight does not exceed 2% of the body’s weight.

Under normal circumstances, the brain relies primarily on glucose (a simple sugar) as its energy source. However, as fasting continues and blood glucose levels decrease, the body begins to activate alternative metabolic mechanisms, most notably the use of fatty acids and the production of ketone bodies in the liver.

Studies in metabolic neuroscience indicate that these ketone bodies, such as beta-hydroxybutyrate, can become an efficient energy source for the brain. Research published in various journals has shown that intermittent fasting can stimulate cellular repair processes in the brain and enhance the production of neuronal growth factors, most notably brain-derived neurotrophic factor (BDNF), which plays a crucial role in synaptic transmission, learning, and memory.

Focus and attention during fasting hours

The effect of fasting on concentration varies from person to person, and is affected by several factors such as sleep quality, meal composition, and hydration level.

Some studies that have examined the effect of fasting during Ramadan on cognitive performance have found that changes in attention and memory are generally limited in healthy individuals, especially when a proper sleep regimen is maintained.

However, some fasting individuals may experience a temporary dip in concentration in the hours leading up to breaking their fast. This is often related to low energy levels or mild dehydration, rather than fasting itself.

Conversely, some studies suggest that fasting may, in some cases, improve the ability to concentrate in the short term, possibly due to reduced fluctuations in blood glucose or increased secretion of certain neurotransmitters associated with alertness.

Withdrawal symptoms: coffee and smoking

One of the important factors that affect concentration and mood in the first days of Ramadan is what is known as withdrawal symptoms, especially among people who consume large amounts of coffee or tea, or among smokers.

Caffeine is a stimulant that affects the central nervous system, and suddenly stopping it during fasting hours leads to symptoms such as headaches, fatigue, difficulty concentrating, and sometimes mood swings.

Research suggests that caffeine withdrawal symptoms may begin within 12 to 24 hours of stopping consumption and can last for several days before the brain adjusts to its absence. This is linked to changes in adenosine receptors in the brain, receptors that play a crucial role in regulating alertness and sleepiness.

The same applies to smokers; temporarily stopping nicotine during fasting hours can lead to withdrawal symptoms including tension, irritability, difficulty concentrating, and increased hunger.

This is due to nicotine’s effect on the brain’s reward system via dopamine, so a temporary drop in dopamine levels can affect mood and attention. These symptoms are often more noticeable during the first few days of Ramadan before the body gradually adjusts.

Mood and psychological balance

On a mood level, the picture is more complex. For some, fasting may be associated with increased stress or irritability, especially in the first few days when the body is adjusting to changes in diet and sleep patterns. However, after a period of adjustment, studies in health psychology indicate that many fasters experience improved psychological stability and a greater sense of calm.

This improvement may be linked to several factors, including hormonal changes, a relative decrease in diet-related inflammation, and the spiritual and social aspects of Ramadan. Changes in certain neurotransmitters, such as serotonin and dopamine, which are key elements in mood regulation, may also play a role.

Sleep: The decisive factor

One of the most important factors determining the effect of fasting on the brain is sleep. During Ramadan, many people experience significant changes in their sleep patterns due to suhoor (pre-dawn meal), Taraweeh prayers, and staying up late. Numerous studies have shown that insufficient sleep or disruption of the circadian rhythm can clearly affect concentration, memory, and mood.

Studies suggest that changes in sleep patterns during Ramadan may have a greater impact on mental performance than fasting itself. Therefore, maintaining sufficient sleep, even if spread over several periods, is essential for preserving cognitive function.

Dehydration and its effect on the brain

Mild dehydration can affect some cognitive functions, such as attention and mental processing speed. Therefore, some fasting individuals may experience mild headaches or difficulty concentrating during hot days or when engaging in strenuous physical activity.

However, these effects are often temporary and can be avoided by adequately replacing fluids between Iftar and Suhoor.

How can we maintain brain function during Ramadan?

To maintain focus and psychological balance during Ramadan, experts recommend several simple steps, including getting enough sleep and regulating its timing as much as possible, eating balanced meals at Iftar and Suhoor that contain proteins, fiber and complex carbohydrates, in addition to drinking sufficient amounts of water between Iftar and Suhoor.

It is also advisable to avoid excessive consumption of simple sugars, which can cause sharp fluctuations in blood glucose levels, and to maintain moderate physical activity.

Therefore, the available scientific evidence suggests that fasting during Ramadan does not typically lead to a significant decline in brain function in healthy individuals. In fact, some research suggests that fasting may stimulate beneficial biological processes in the brain, such as improving neuroplasticity and activating cellular repair mechanisms.

However, the actual impact on concentration and mood depends largely on lifestyle factors, especially sleep, nutrition and hydration, as well as adapting to temporary withdrawal from stimulants such as caffeine and nicotine.

In other words, the brain adapts remarkably to fasting, but the way a person lives the month of Ramadan determines whether this adaptation will translate into mental clarity and psychological tranquility, or into fatigue and a temporary decline in concentration.