The Donguibogam's view of the kidney as our body's fundamental energy source and the root of the lower body allows for a very convincing interpretation from modern medical perspectives as well. Beyond simple kidney function, male prostate gland and urinary bladder functions, as well as overall sexual health, depend on various complex factors including hormones, the nervous system, and vascular function.
First, interpreting kidney essence deficiency in modern terms closely links it to a decrease in testosterone levels, the male androgen. Testosterone is a hormone that decisively affects muscle mass maintenance, bone density, energy levels, as well as libido and erectile function. It begins to decrease gradually starting in the mid-30s, and by the 40s and 50s, it can trigger andropause symptoms, which aligns with the depletion of essence described in Donguibogam. A testosterone decrease can lead not only to weakened lower body muscle strength, but also to hypoactive sexual desire, erectile dysfunction, and general lethargy.
Furthermore, the weakening of urinary function—such as urinary frequency, nocturia, and a weak urine stream—is closely related to benign prostatic hyperplasia (BPH) and urinary bladder dysfunction. The prostate gland is an organ found only in men, surrounding the urethra beneath the urinary bladder. Benign prostatic hyperplasia, in which the prostate gland enlarges with aging, compresses the urethra, preventing urine from flowing smoothly and causing sensation of residual urine or frequent urination. In Donguibogam, this can be seen as a state where weakened kidney qi prevents the smooth circulation of body fluids.
The function of the urinary bladder itself is also important. The urinary bladder is regulated by the autonomic nervous system; specifically, when the parasympathetic nervous system is activated, the urinary bladder contracts to expel urine, and when the sympathetic nerve is activated, the urinary bladder relaxes to store urine. With aging, elasticity of the bladder wall decreases, and an imbalance of neurotransmitters can make the urinary bladder overactive or impair its ability to relax. This worsens urges where it is suddenly difficult to hold urine, frequent urination, or nocturia where one wakes during the night to use the bathroom. This connects to Donguibogam's explanation that the kidney and urinary bladder have a mutually complementary relationship. It means that if kidney qi falls, the urinary bladder also struggles to fulfill its function.
Vascular health cannot be overlooked either. Blood circulation to the lower body and urinary organs is essential for nutrient supply, waste removal, and erectile function. Chronic diseases such as atherosclerosis, hypertension, and diabetes damage blood vessels and hinder this circulation, which can be interpreted as a phenomenon where insufficient kidney essence obstructs circulation. Especially since erectile dysfunction is often called a barometer of vascular health, blood circulation is crucial.
In conclusion, modern medicine shows that the kidney strength described in Donguibogam is closely connected to androgen balance, autonomic nervous system-regulated urinary bladder function, prostate gland health, and overall vascular health. All these elements must work in harmony to maintain lower body strength, enjoy smooth urinary system function, and lead a vibrant life after middle age.
