From the perspective of modern medicine, the transportation and transformation function of the spleen described in the Donguibogam broadly reflects the coordinated workings of the digestive system, immune responses, and the gut-brain axis. Feeling sick after eating often extends beyond an immediate, IgE-mediated food allergy to involve subtler and more intricate issues like food sensitivity or food intolerance.
Food sensitivity is a delayed immune response triggered by specific foods, frequently mediated by IgG and IgA antibodies or a cell-mediated immune response rather than an IgE antibody. Unlike immediate, life-threatening allergic reactions such as anaphylaxis, food sensitivity develops gradually over several hours or even days, which makes pinpointing the trigger food difficult. Beyond chronic dyspepsia, abdominal pain, gas, diarrhea, and constipation, food sensitivity can also contribute to skin flare-ups, headache, joint pain, chronic fatigue, impaired concentration, and changes in mood.
A primary contributor to food sensitivity is leaky gut syndrome. The intestinal barrier normally functions as a selective barrier, allowing beneficial nutrients to pass into circulation while keeping out harmful compounds and undigested food particles. However, when the intestinal mucosa is compromised by chronic stress, dietary factors like excessive sugar and processed food intake, certain medications, or gut dysbiosis, the barrier loosens. Undigested protein fragments and bacterial toxins can then pass into the bloodstream.
The immune system identifies these leaked substances as foreign threats and mounts an attack, generating an inflammatory cascade that defines food sensitivity. Because approximately 70 to 80 percent of the body's immune cells reside along the intestinal tract, compromised gut health readily leads to systemic immune imbalance and persistent inflammation.
Meanwhile, food intolerance, including lactose intolerance and gluten intolerance, stems primarily from enzyme deficiencies. Lactose intolerance results from a shortage of lactase, the enzyme required to digest the sugar in dairy, while gluten intolerance in the absence of celiac disease occurs when the body struggles to break down gluten proteins, straining the digestive tract. In this light, the Donguibogam's concept of weakened transport and transformation of the spleen captures the decline of the body's digestive enzyme capacity along with reduced intestinal barrier and elimination function.
Gut health is also intimately linked to neurological function. Through the gut-brain axis, the gut microbiota produces neurotransmitters and regulates inflammatory signals that directly shape mood, cognitive function, and the stress response. When the intestines are inflamed or distressed, psychological stress and sensitivity often rise; conversely, elevated stress impairs intestinal motility and barrier function, creating a persistent feedback loop.
Feeling unwell after eating is rarely just a matter of having a delicate stomach. It is often an important indicator that intestinal barrier balance has broken down, the immune system is overreacting, and systemic inflammation may be present. Listening attentively to these bodily signals is the first step toward addressing the underlying cause.
