Q. I've been drinking diet drinks because they're supposed to be low-calorie, but do they really not cause weight gain? I'm curious about how they actually affect the body.

I used to rely on zero-calorie drinks during busy days, thinking I was dieting smartly, only to find myself feeling dizzy and fatigued after a while. It was a lesson in how misleading these products can be. From a modern medical perspective, artificial sweeteners provide a sweet taste without raising blood glucose. The problem arises here: the brain perceives the 'sweetness' and expects energy, but since no actual calories arrive, a compensatory mechanism is triggered, often leading to increased cravings for high-calorie foods. In Traditional Korean Medicine (TKM), this can be understood through the concept of 'Dameum' (痰飮), which refers to metabolic waste products formed when fluid metabolism is impaired. Repeated intake of artificial additives can cause stagnation in the digestive system's Qi, leading to the accumulation of 'Seup-dam' (damp-phlegm), which hinders weight loss and creates a feeling of heaviness. Those with a 'Bi-heo' (脾虛, Spleen Deficiency) constitution—characterized by weak digestive capacity—should be especially cautious. When Spleen function is diminished, the body lacks the strength to process these synthetic additives, making you more prone to edema (swelling) and lethargy. Ultimately, dieting is not a game of calorie counting, but a process of restoring your body's natural metabolic rhythm. An occasional drink is fine, but I recommend gradually reducing the habit of replacing water with these beverages.