If Your Alopecia Began in Your Thirties, Could Your Kidney Organ Be Aging?

The concept of the kidney in Donguibogam aligns with several physiological systems in modern medicine. In androgenetic alopecia, often cited as the leading cause of male pattern hair loss, genetic predisposition works alongside hormonal imbalance. Specifically, the androgen testosterone is converted by 5-alpha reductase into dihydrotestosterone, which shrinks hair follicles and disrupts hair growth. Dihydrotestosterone shortens the anagen phase of the hair growth cycle and accelerates the shift into the telogen phase, thinning the hair shaft until it falls out, much like leaves falling when roots dry up. This hormonal shift does not stem from genetics alone. Chronic stress alters autonomic nervous system activity, elevating stress hormones like cortisol, which can alter the testosterone-dihydrotestosterone pathway and trigger localized inflammation around hair follicles. Stress also restricts blood flow to the scalp. Just as Donguibogam explains that the kidney stores essence to nourish the entire body, modern medicine recognizes that blood delivers essential oxygen and nutrients to hair follicles. Impaired capillary circulation deprives follicles of nutrition, causing them to shrink and accelerating alopecia. Scalp capillaries are vulnerable to stress, smoking, and irregular diet. Thus, the kidney concept in Donguibogam can be understood through modern medical factors—genetic predisposition, hormonal balance, stress response, and scalp microvascular circulation—that collectively drive hair loss. Alopecia is closely tied to the overall state of bodily health.