Does a Dietary Plan Exist That Supports Brain Function?

Research indicates that, much like other mammals, the human brain performs optimally with consistent physical exercise, balanced nutrition, and meaningful social engagement. Despite constituting only 2% of body weight, it consumes up to 20% of available energy, rendering it highly susceptible to dietary-induced metabolic disruptions. Given the rising prevalence of Alzheimer's disease, characterized by neuronal degradation, preserving brain health and cognitive function has emerged as a critical focus in contemporary medicine. Projections suggest that by 2050, approximately 130 million individuals may be affected by this condition (A.L. Cremonini et al., 2019).

Diet plays a crucial role in maintaining brain health. Not only individual nutrients but also calorie intake significantly impact brain function. The brain evolved primarily for efficient food acquisition and performs optimally under mild caloric deficit conditions. This explains the beneficial effects of intermittent fasting on cognitive functions. Unfortunately, modern lifestyles often fail to provide ideal conditions for brain health. Traditional diets are frequently overly calorie-dense, increasing the risk of premature aging and neurodegenerative diseases. Similarly, obesity can damage certain brain regions and impair the activity of areas responsible for behavior control, hunger, and satiety. Research indicates these disruptions are reversible through weight loss. Notably, even a week of dietary modification can produce observable improvements in brain function. One of the most promising dietary approaches for brain health is the Mediterranean diet, rich in plant-based foods, fish, and healthy fats. Studies confirm its neuroprotective effects and ability to delay brain aging, particularly in preserving cognitive functions. A diverse diet abundant in antioxidants and healthy fats may protect the brain from neurodegenerative changes, enhance neurotransmitter function, boost cognitive abilities, maintain metabolic balance, and reduce inflammation.

Modern Western diets rarely result in a negative calorie balance, but moderate caloric restriction can offer numerous health benefits (E. P. Weiss et al., 2011). It improves insulin sensitivity, lipid profile, and autonomic nervous system function, aids in fat tissue reduction, and delays aging processes. Additionally, it may enhance brain plasticity and learning capacity while reducing the brain's susceptibility to damage, as demonstrated in animal models (T. Murphy, G. P. Dias, S. Thuret, 2014). However, extreme caloric restrictions should be avoided, as they can lead to adverse effects. The deficit should be moderate and accompanied by adequate vitamin and mineral intake. Currently, intermittent fasting (IF) is particularly popular, and studies in animals have shown positive changes in the brain, particularly in memory and learning. Research conducted over 20 weeks also suggests neuroprotective effects (T. Murphy et al., 2014). The optimal dietary approach for brain support should be discussed with a specialist.

Contemporary diets are often rich in fats, particularly saturated fats found predominantly in processed foods and animal products. However, such dietary patterns do not necessarily benefit brain health. The consumption of excessive saturated fats has been linked to adverse effects on cognitive functions and damage to brain structures responsible for memory. There is also evidence suggesting that they may contribute to neurodegenerative diseases. Researchers propose that inflammation triggered by excessive intake of these nutrients could be a contributing factor (H. Francis et al. 2013). This hypothesis was supported by animal studies where 60% of daily caloric intake came from fats, leading to not only weight gain but also impaired brain function in mice (P. J. Pistell et al. 2010). Fats are present in most commonly consumed foods, but they are typically in an unfavorable form, dominated by saturated and trans fatty acids. Conversely, omega-3 fatty acids exhibit anti-inflammatory properties. EPA and DHA, which belong to this group, are components of neurons and are therefore essential for proper nervous system function. Their adequate intake in the daily diet not only protects brain cells but also enhances neurotransmission. Research confirms the positive impact of EPA on mental health, including the alleviation of depressive symptoms (A. Tanskanen et al. 2001). Additionally, these fatty acids contribute to increased brain plasticity. The recommended daily intake is approximately 250 mg, equivalent to two servings of fish per week.

The modern diet is abundant in sugar, which is present not only in sweets but also in spices, bread, beverages, ready-made meals, and processed meats. According to current guidelines, the calories derived from sugar should not exceed 10% of daily energy requirements. Simple sugars not only increase the risk of obesity, type 2 diabetes, and dental caries but also negatively affect brain function. Epidemiological studies suggest that insulin resistance accelerates the progression of cognitive impairments, potentially leading to faster brain aging. Individuals with diabetes experience a 45% faster decline in memory (L. R. Mujica-Parodi et al., 2020). Therefore, reducing the intake of simple sugars in daily nutrition appears justified.

These are antioxidant compounds present in fruits, vegetables, coffee, tea, and cocoa. They enhance neuronal communication and promote neurogenesis (K. S. Bhullar et al., 2013).

This bioactive compound derived from turmeric exhibits potent antioxidant properties, demonstrating significant anti-inflammatory and neuroprotective effects.

A bioactive compound with antioxidant properties, primarily found in the skins of dark grapes and nuts, demonstrating neuroprotective effects.

DHA and EPA are essential omega-3 fatty acids that exhibit anti-inflammatory, neuroprotective properties and enhance neuronal transmission. They are abundant in fatty fish and algae, while smaller quantities can be found in eggs and beef.

Proper nutrition plays a vital role in maintaining nervous system health. Brain function directly impacts quality of life, which declines with age. Given the rising prevalence of neurodegenerative diseases like Alzheimer's, finding effective ways to delay brain aging is essential. Unfortunately, the currently popular diet, which relies heavily on processed foods high in saturated fats, refined sugars, and salt, does not support brain health. Fortunately, making a few simple dietary adjustments can significantly improve cognitive function over the long term.

A moderately calorie-restricted diet that ensures the intake of all essential nutrients. A high consumption of fruits and vegetables in the diet. Two meal intervals between main meals can be achieved most easily by having a later breakfast, so that the overnight break between meals lasts several hours. A balanced diet that provides all necessary nutrients. Two servings of fish per week or supplementation with DHA and EPA acids at a dose of 250 mg per day. Replacing saturated fats with unsaturated fats of plant origin, such as oils, nuts, and seeds. The diet is based on the principles of the Mediterranean diet, emphasizing plant-based, local, and seasonal products. Reduction in the consumption of processed foods and red meat. It should be noted that while the diet is beneficial, it does not provide complete protection. To comprehensively support the nervous system, regular physical activity should be engaged in, social relationships should be maintained, and social isolation should be avoided. It is also advisable to regularly take on new challenges that promote the formation of new neural connections in the brain.