Q. I keep hearing that tofu and doenjang (soybean paste) are excellent for weight loss. What is the specific mechanism behind how they help with dieting?

Many people struggle with extreme dieting by starving themselves, which often leads to exhaustion and failure. The key to sustainable weight loss is focusing on what you use to nourish your body. From a modern medical standpoint, the protein in tofu triggers satiety hormones to quiet 'fake hunger,' while the probiotics in fermented doenjang improve the gut ecosystem. A healthy gut environment reduces insulin resistance, shifting the body into a state that burns fat more efficiently. In Traditional Korean Medicine (TKM), the inability to lose weight is often attributed to Spleen Deficiency (Biheo). When the Spleen—the core of the digestive system—is weak, it cannot transport nutrients efficiently, leading to the accumulation of a sticky metabolic waste called Phlegm-fluid (Dameum). This is a primary culprit behind 'stubborn fat' and a constitution prone to swelling. Tofu and doenjang work by invigorating Spleen Qi. Specifically, doenjang helps resolve Blood Stasis (Eohyeol) and dissolves Phlegm-fluid (Dameum) to facilitate smooth metabolic circulation. This represents a 'tonifying' (Bo) approach to dieting, where you restart the body's metabolic engine rather than just cutting calories. To get the best results, be mindful of the sodium in doenjang by cooking it with plenty of vegetables for a low-salt, nutrient-dense meal.