Through the lens of modern science, the wisdom of the Donguibogam remains remarkably precise. Hair is not merely an inactive bundle of protein; it is produced by cells that divide and grow at some of the fastest rates in the human body. Sustaining this active growth demands a steady supply of energy and diverse nutrients, much like a small factory requires continuous fuel and parts to operate.
Hair repeats a continuous cycle of growth and shedding through three distinct stages: the anagen phase, catagen phase, and telogen phase. During this progression, nutrients such as protein, iron, zinc, vitamin D, vitamin B complex (especially biotin), and essential fatty acids must work closely together like interlocking gears. However, when these essential nutrients fall short due to extreme dieting or an unbalanced diet, the body enters an emergency state. It directs available nourishment primarily to organs critical for immediate survival, such as the heart and brain, while reducing the supply to relatively non-urgent hair follicle cells.
As a result, hair prematurely shifts into the catagen phase or telogen phase instead of sustaining the anagen phase. Strands shed before they can grow sufficiently, and newly emerging hairs turn thin, weak, and limp like fine down. Iron deficiency anemia impedes oxygen delivery to hair follicles, and insufficient protein hinders the production of keratin, the primary component of hair. Zinc is indispensable for hair follicle cell division and repair; lacking it leaves hair prone to breakage. Alopecia caused by nutritional deficiency thus does more than reduce overall volume; it leaves hair dry, dull, thin, and brittle. Rather than overlooking this as a superficial concern, it is important to recognize that it may be a warning sign regarding your overall health.
