Memory and the Brain: 7 Factors Worth Paying Attention To

Memory is not a single, isolated brain function, but the result of a complex network involving neurons and synapses, cerebral blood flow, metabolism, sleep, hormones, and the availability of essential nutrients.

In everyday life, it is common to go through periods when we find it harder to remember a name, recall information, or concentrate. Occasional forgetfulness is not, on its own, a sign of disease, as factors such as sleep, chronic stress, physical activity, diet, certain medications, and overall metabolic and cardiovascular health can influence cognitive function.

Modern approaches to brain health consider the body's overall condition and the factors that may affect neuronal function and neuroplasticity. Within the framework of Functional Medicine, when changes in memory or concentration persist, practitioners may explore potential contributing factors such as sleep disturbances, chronic stress, metabolic imbalances, and nutrient deficiencies.

The good news is that many of these factors are modifiable. Small but consistent changes in everyday life can form part of a long-term strategy to help maintain cognitive function. In this context, it is important to understand what the brain needs to function properly, as well as when changes in memory may require closer attention and further investigation.

How Memory Works and What the Brain Needs

Memory is not located in a single “center” of the brain. Different brain regions and neural networks work together to form, store, and retrieve memories. The hippocampus plays a particularly important role in the formation of new declarative memories, while regions of the cerebral cortex are involved in the long-term storage and retrieval of information.

For these networks to function effectively, neurons need to communicate and adjust the strength of their connections. This ability is part of neuroplasticity, the nervous system’s capacity to change in response to experience and learning. Neurotransmitters and neurotrophic factors, such as BDNF, are involved in this process and contribute to synaptic function and plasticity.

At the same time, the brain has high energy demands and requires a continuous supply of oxygen and glucose. Factors that affect vascular and metabolic health, such as blood pressure and glycemic regulation, are therefore also important for long-term brain health.

Sleep is equally important, as it supports processes involved in memory consolidation, meaning the stabilization and reorganization of information acquired during the day.

7 Factors Worth Paying Attention to for Memory and Brain Health – Mini Prevention Guide

Brain health is shaped over time. There is no single food, supplement, or habit that can guarantee a good memory. However, there are factors that we can consistently take care of:

1. Prioritize quality sleep. Sleep plays an active role in the processing and consolidation of memories. Chronic sleep deprivation or poor sleep quality can affect attention, learning, and the ability to recall information. Try to maintain relatively consistent sleep and wake times and investigate the underlying cause when sleep remains consistently insufficient or unrefreshing.

2. Make physical activity part of your daily routine. Regular physical activity supports cardiovascular and metabolic health and is associated with better preservation of cognitive function. It also influences mechanisms of neuroplasticity and factors such as BDNF. Brisk walking, cycling, swimming, and strength training can gradually be incorporated into your daily routine.

3. Pay attention to your diet and ensure adequate nutrient intake. Dietary patterns rich in vegetables, fruits, legumes, whole grains, nuts, fish, and olive oil provide fiber, fatty acids, and micronutrients. Identifying actual deficiencies, such as vitamin B12 or folate deficiency, is particularly important when relevant risk factors or symptoms are present.

4. Monitor your metabolic and cardiovascular health. Hypertension, impaired glycemic regulation, obesity, and lipid disorders are factors that, when present over many years, are associated with an increased risk of cognitive decline. Monitoring blood pressure and key metabolic markers is part of a broader prevention strategy.

5. Do not underestimate chronic stress. When psychological stress becomes prolonged, it can affect sleep, attention, and the effective encoding of new information. Exercise, relaxation techniques, regular breaks, and a relatively consistent daily routine can help manage the demands of everyday life.

6. Keep your brain active and maintain social connections. Learning a new skill, reading, music, learning a language, and other mentally demanding activities engage different neural networks. At the same time, social interaction is an important aspect of cognitive health. The aim is to provide the brain with a variety of stimuli, opportunities for learning, and meaningful interaction.

7. Limit factors that can negatively affect long-term brain health. Smoking and excessive alcohol consumption are associated with adverse effects on vascular and brain health. Limiting these factors is an important part of taking care of long-term brain health.

The factors above often interact with one another. For long-term brain health, consistency is more important than short-lived, dramatic changes.

When Does a Change in Memory Require Further Investigation?

Occasionally forgetting a name, an appointment, or where you left your keys does not necessarily mean that there is a problem with brain function. A new, persistent, or progressively worsening change, however, may have a different significance.

When difficulty learning or recalling information becomes recurrent, affects work or daily activities, or is accompanied by changes in speech, orientation, or the ability to carry out familiar tasks, medical evaluation is warranted. Laboratory testing may form part of the overall clinical and neurological assessment.

Depending on the individual’s medical history and symptoms, evaluation may include thyroid function, glycemic and cardiovascular health, as well as the status of specific nutrients. Particular attention may be given to vitamin B12, folate, and homocysteine, whose metabolism is closely linked to B vitamins. Vitamin B12 deficiency may be associated with neurological manifestations and is therefore clinically important to identify.

In a more individualized assessment, specialized biomarkers may also be considered, such as brain-derived neurotrophic factor (BDNF), which is involved in neuronal maintenance and synaptic plasticity. Its measurement, however, is not in itself a diagnostic test for memory disorders or dementia.

Within Functional Medicine, the aim is not to perform as many tests as possible, but to select those that may provide useful information based on the clinical picture. Persistent changes in memory should therefore neither cause panic nor be ignored, as timely evaluation may help identify potentially modifiable factors and, when appropriate, guide further neurological investigation.

As part of such an individualized assessment, the following may also be considered:

• BDNF - Brain-Derived Neurotrophic Factor, a neurotrophic factor involved in neuronal survival, synaptic plasticity, and mechanisms of learning and memory.
• Homocysteine, a metabolic marker closely linked to the metabolism of folate and vitamins B6 and B12, which can be assessed as part of a broader evaluation.
• NutriScan® Vitamin and Micronutrient Tests, for evaluating the status of vitamins and other essential micronutrients. Deficiencies in specific nutrients may affect the normal function of the nervous system.
• Thyroid Extended Profile, as thyroid hormones influence metabolism and nervous system function, while thyroid disorders may be accompanied by changes in concentration and memory.
• Glucose and HbA1c (glycated hemoglobin), for the assessment of glycemic status. Metabolic health is an important component of overall brain health and the long-term preservation of cognitive function.
   

These tests do not directly assess memory and are not used individually to diagnose cognitive disorders. Their selection is based on the medical history, symptoms, and clinical evaluation.

Brain Health Prevention Starts Earlier Than We Think

Taking care of memory is not only important later in life. Age, genetic predisposition, and various neurological conditions are important factors that we cannot always influence. However, there are modifiable factors associated with long-term brain health.

Prevention does not need to involve drastic changes. Consistent and adequate sleep, regular physical activity, a balanced diet, managing blood pressure and metabolic health, avoiding smoking, limiting excessive alcohol consumption, and maintaining social and cognitive activity are practical steps for supporting overall brain health.

References

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2. Iso-Markku P, Aaltonen S, Kujala UM, Halme HL, Phipps D, Knittle K, Vuoksimaa E, Waller K. Physical Activity and Cognitive Decline Among Older Adults: A Systematic Review and Meta-Analysis. JAMA Netw Open. 2024 Feb 5;7(2):e2354285. doi: 10.1001/jamanetworkopen.2023.54285. PMID: 38300618; PMCID: PMC10835510.
3. Reparaz-Escudero I, Izquierdo M, Bischoff-Ferrari HA, Martínez-Lage P, Sáez de Asteasu ML. Effect of long-term physical exercise and multidomain interventions on cognitive function and the risk of mild cognitive impairment and dementia in older adults: A systematic review with meta-analysis. Ageing Res Rev. 2024 Sep;100:102463. doi: 10.1016/j.arr.2024.102463. Epub 2024 Aug 22. PMID: 39179115.

At Diagnostiki Athinon, we treat prevention with the seriousness it deserves. This is where science meets personalized care.