Q. I'm managing my diet with Subway salads and sandwiches, but why do some combinations work while others lead to weight gain?

Many people struggle with the paradox of eating 'healthy' sandwiches while not seeing weight loss. The issue isn't just about total calories, but how specific ingredients affect your internal chemistry. From a Western medical perspective, refined carbs and high-sugar sauces cause 'blood sugar spikes.' The resulting insulin surge acts as a metabolic switch that stores excess energy as body fat, making the choice of bread and sauce critical. In Traditional Korean Medicine (TKM), this phenomenon is explained through the concept of 'Dameum' (痰飮, phlegm-fluid retention). Dameum refers to metabolic waste produced when fluid metabolism is impaired. When a person with 'Bi-heo' (脾虛)—a deficiency in Spleen function—consumes excessive refined sugars or processed foods, the body fails to process them efficiently, leading to the accumulation of sticky, stagnant waste in the body. Furthermore, the high sodium content in stimulating sauces causes water retention, leaving the body feeling bloated and heavy. Ultimately, how your body 'processes' the food is more important than just 'what' you eat. If you have a constitution prone to poor digestion or chronic swelling, focusing on restoring your metabolic function is the most effective path to weight management.