Always Forgetting Things? When Qi Weakens, the Brain Tires Too

The concept of qi in Donguibogam closely aligns with modern medical understandings of cerebral energy metabolism, neurotransmitter balance, and cerebral blood flow. Although the brain accounts for only 2% of total body weight, it consumes more than 20% of the body's energy. Weakening qi can ultimately signal a disruption in this cerebral energy metabolism. First, there is mitochondrial dysfunction. Mitochondria, the cellular powerhouses of our body, generate energy in the form of adenosine triphosphate (ATP). When mitochondrial function declines due to stress, sleep deprivation, nutritional imbalance, and other factors, brain cells cannot obtain sufficient energy. This mirrors the explanation in Donguibogam that a deficiency of qi impairs brain function. In addition, neurotransmitter imbalance is a significant factor. When acetylcholine (essential for memory), dopamine (involved in concentration and motivation), and serotonin (which influences mood and sleep) become depleted by stress and chronic fatigue, the brain struggles to process and retain information efficiently. In particular, chronic stress triggers the excessive secretion of cortisol, which can impair the function of the hippocampus responsible for memory. Reduced cerebral blood flow is equally significant. The smooth flow of qi is closely tied to blood circulation; when blood supply to the brain is compromised, delivery of oxygen and nutrients decreases, leading to deteriorated brain cell function. This is comparable to how transport slows down when congestion forms on a highway. Furthermore, chronic inflammation, reduced sleep quality, and impaired gut health can combine to induce a hazy mental state known as brain fog. Beyond simple lapses in memory, broader cognitive decline can significantly reduce daily functioning and quality of life. Caring for the body's qi remains a key element in protecting overall brain health.