Cognitive performance: the most effective dietary supplements

Cognitive performance refers to the brain's ability to process, store, and retrieve information efficiently. A complex organ made up of billions of interconnected neurons, the brain is divided into several regions: the cerebral cortex, the seat of reasoning and decision-making, and the hippocampus, which is essential for memory. These structures operate thanks to neurotransmitters such as dopamine (motivation and learning), acetylcholine (memory), and serotonin (mood and sleep). Memory follows three main stages: encoding, which involves transforming information into usable data, long-term storage, and retrieval. With age, these processes can be impaired due to structural changes in the brain, such as reduced brain volume, neuron loss, and decreased synaptic plasticity. Essential neurotransmitters also become scarcer, directly impacting mental functions. Aging leads to cognitive changes characterized by slower information processing, decreased memory, and reduced problem-solving abilities. These alterations are often due to oxidative stress, chronic inflammation, and a decline in neurogenesis. Cognitive performance can be optimized and maintained by working on several areas listed below.

Supporting Neurotransmitters

Neurotransmitters are essential for proper brain function because they enable communication between neurons. It is important to maintain optimal levels of key neurotransmitters, notably through diet (precursors such as tyrosine or tryptophan), stress management, and specific dietary supplements: • Dopamine: linked to motivation, focus, and regulation of behavior. • Acetylcholine: essential for memory and learning. • Serotonin: regulates mood, sleep, and emotional functions. • GABA: an inhibitory neurotransmitter that helps reduce anxiety and promote relaxation.

Promoting Neurogenesis

The brain's ability to generate new neurons, even in adulthood, is fundamental for brain plasticity and cognitive recovery. Factors influencing neurogenesis include: • Physical exercise: promotes the production of BDNF (Brain-Derived Neurotrophic Factor), a key protein in neurogenesis. • Diet: nutrients such as omega-3s, turmeric, and polyphenols support neuronal growth. • Cognitive stimulation: learning and new experiences strengthen neural connections.

Strengthening Memory

Memory is a multidimensional process: • Encoding: capturing and processing incoming information. • Storage: retaining information in the short and long term. • Retrieval: recalling information from memory. With aging, storage becomes less efficient. Strategies such as brain training, a diet rich in antioxidants, and quality sleep are recommended to optimize this process. Moreover, chronic stress, via elevated cortisol, can damage the hippocampus, a key structure for memory.

Risk Factors

Poor cardiovascular health, chronic stress, and sleep disorders are all factors that promote cognitive decline. Furthermore, recent research highlights the interaction between the gut microbiota and the brain (gut-brain axis). A healthy gut flora contributes to the regulation of neurotransmitters, the reduction of inflammation, and improved resistance to stress.

Preserving Cognitive Functions

A diet rich in essential nutrients supports proper brain function. The omega-3 fatty acids, found in fatty fish, strengthen synaptic integrity and reduce inflammation. Antioxidants such as vitamins C and E neutralize free radicals responsible for neuronal damage. B vitamins, notably B12 and B6, help regulate homocysteine levels, a cardiovascular risk factor but also a risk for cognitive decline. In addition to diet, sleep plays a crucial role by allowing the brain to consolidate memories and eliminate toxins. Physical activity improves cerebral blood flow and promotes the production of new neurons in the hippocampus. Stimulating activities such as reading, learning a language, or playing a musical instrument strengthen neural connections, while stress management protects against the harmful effects of cortisol. Plant extracts such as turmeric or ginseng show benefits in reducing inflammation and improving cognitive functions. Trace elements such as zinc and magnesium support essential neuronal mechanisms, and finally probiotics help restore healthy communication between the brain and the gut microbiota.