How, then, can the kidney energy described in Donguibogam be explained in modern medicine? Rather than discussing solely the anatomical functions of the kidney, it can be seen as closely linked to the body's overall, deep physiological regulatory capacity.
First, the vital energy called essence can be compared to cellular vitality and hormonal balance in modern medicine. In particular, it is closely related to the function of the adrenal gland. The adrenal gland secretes stress hormones like cortisol, as well as various sex hormones and mineralocorticoids, thereby regulating our stress response, energy metabolism, immune function, and reproductive function. Chronic stress, sleep deprivation, and poor dietary habits can exhaust the adrenal gland and trigger symptoms similar to adrenal fatigue syndrome. This can be understood in the same context as the consumption of kidney qi mentioned in Donguibogam. Alopecia, chronic fatigue, and impaired concentration are representative symptoms.
Second, the kidney governing the bones, bone marrow, and brain is connected to bone marrow hematopoietic function, nervous system health, and maintaining bone mineral density. The kidney regulates calcium metabolism through vitamin D activation and directly influences bone health. When kidney function declines, vitamin D activation becomes difficult, which can increase the risk of osteoporosis or osteomalacia. In addition, the process by which blood cells are produced in the bone marrow and immune cells mature aligns with the concept in Donguibogam that essence fills the bone marrow. Brain function also depends on the balance of neurotransmitters and the vitality of brain cells, which can be indirectly linked to kidney energy. The aging of brain nerve cells can likewise be seen as having the same meaning as the consumption of kidney essence.
Third, the perspective of viewing hair as the surplus blood of the kidney emphasizes the importance of the hair growth cycle, blood circulation, and nutritional supply. Hair follicle cells divide very actively, requiring an adequate blood supply and nutrients. Chronic stress caused by adrenal fatigue can constrict scalp blood vessels and trigger inflammatory reactions, which can hinder the blood supply to hair follicles. In addition, an imbalance in thyroid hormones and sex hormones is also an important cause of alopecia, and these hormones are deeply related to the adrenal gland. In this way, kidney health is directly connected to the balance of our body's overall systems, including hormones, metabolism, immunity, and regeneration. When that balance is disrupted, it notifies us through signals such as alopecia or joint pain. Rather than dismissing these symptoms simply as the result of getting older, please pay attention to the messages your body is sending.
