From a Western medical perspective, tofu is an excellent low-calorie protein source and cabbage is a powerhouse of dietary fiber. Together, they increase the time food stays in the digestive tract, which stabilizes blood sugar levels and prevents the body from signaling fat storage. Traditional Korean Medicine (TKM) offers an even more nuanced explanation. Many individuals struggling with weight gain are in a state of 'Stomach Heat' (胃熱, Wi-yeol). This internal heat triggers 'false hunger,' making you feel hungry even when your body doesn't need more fuel. Cabbage serves to calm and cool this overactive stomach energy. Furthermore, tofu helps address 'Spleen Deficiency' (脾虛, Bi-heo). Dieters often experience a significant drop in 'Qi' (vital energy), leading to fatigue; tofu helps replenish this energy and supports metabolic function. However, constitution is key. If you have 'Spleen Yang Deficiency' (脾陽虛, Bi-yang-heo)—characterized by a cold abdomen and weak digestion—eating too much raw cabbage can lead to the accumulation of 'Phlegm-fluid' (痰飮, Dam-eum), causing bloating and discomfort. For those individuals, lightly steaming the cabbage is a much healthier choice. It is always best to adjust cooking methods to match your digestive capacity and personal constitution.