In modern medicine, the essence qi described in Donguibogam can be understood as deeply connected to essential micronutrients. Among them, zinc in particular is an essential contributor to numerous biological functions, including our immunity, skin, hair, and gustatory sense. Zinc plays a pivotal role in the growth and activation of immune cells. Zinc is indispensable when immune cells such as T cells and B cells fight external pathogens and remember them. Therefore, when zinc absorption in the small intestine becomes poor, our immune system weakens, leaving us prone to frequent colds and vulnerable to various infections. The same is true for skin health. Zinc is deeply involved in skin cell differentiation, regeneration, and wound healing. It also plays an important role in collagen synthesis, making it essential for maintaining skin elasticity and skin barrier function. If the small intestine does not absorb zinc properly, skin becomes rough, inflammatory reactions occur easily, and troubles such as acne and eczema can recur. Furthermore, zinc deficiency directly affects the hair growth cycle. By inhibiting the proliferation and function of hair follicle cells, it can cause hair to thin or shed easily, leading to symptoms of alopecia. Especially when stress and nutritional imbalance overlap, this tendency can become more pronounced. In addition, gustatory abnormality is a representative symptom of poor zinc absorption. Zinc is a constituent of a protein called gustin, which is necessary for regenerating and activating gustatory receptors. If zinc absorption in the small intestine is impaired, taste acuity diminishes, or one can experience gustatory abnormality where the perception of certain tastes becomes distorted. In this way, the small intestine is not merely a digestive organ, but an essential site that absorbs micronutrients like zinc to coordinate the balance and function of the entire body. The health of the small intestine is directly linked to the body's overall vitality.
