Many people adopt a vegan or vegetarian diet to support their health. Yet without proper planning, this shift can inadvertently disrupt the body. In modern medicine, the classical concept of the spleen and stomach corresponds closely to the overall digestive system, its function, and the gut microbiota. Far from being a simple tube for processing food, the gut is often referred to as the second brain, playing an essential role in neurotransmitter production and immune regulation.
A common challenge with vegetarian and vegan diets is the risk of deficiencies in key nutrients, including protein, vitamin B12, iron, and omega-3 fatty acids. Protein supplies the building blocks for muscles, enzymes, hormones, and neurotransmitters. Insufficient protein intake impairs the renewal of intestinal mucosal cells and reduces digestive enzyme secretion. Consequently, food is not broken down properly and ferments in the intestinal tract, producing excess gas and abdominal distension. Unabsorbed residues then feed harmful bacteria in the gut, worsening dysbiosis and triggering inflammatory responses.
Furthermore, vegetarian diets naturally increase dietary fiber intake. A sudden spike in fiber, especially when intestinal function is already compromised, can overburden the digestive tract and create ongoing discomfort. In addition, shortages of vitamin B12 and iron hinder erythropoiesis and lead to anemia, resulting in chronic fatigue and lethargy. Inadequate omega-3 fatty acids can further impair brain function and exacerbate inflammation.
The gut-brain axis illustrates how directly gut health governs mood and energy levels. The gut microbiota synthesizes a significant portion of neurotransmitters like serotonin. When the intestinal environment deteriorates, production falters, contributing to lowered mood and persistent fatigue. Just as the Donguibogam emphasized the central role of the spleen and stomach, modern science affirms that a balanced gut environment and complete nutrition form the bedrock of systemic health. A vegetarian diet offers clear benefits, but it must be tailored intelligently to match your individual digestive capacity while meeting every nutritional requirement. How you prepare and consume your food matters just as much as eating more plants.
