Q. What exactly are convenience store diet foods, and why do they affect weight loss?

Let's first look at what these convenience store 'diet' foods actually are. Products labeled for weight loss—such as cup salads, chicken breast sausages, protein bars, and low-fat yogurts—often look appealing due to their low calorie counts. However, they are frequently laden with added sugars, sodium, and various food additives, leading to significant nutritional imbalances. From a Western medical standpoint, these processed foods are primarily composed of refined carbohydrates and simple sugars. These cause blood glucose levels to spike and then crash rapidly, triggering an overproduction of insulin. Since insulin is a hormone that promotes fat synthesis, this creates a biological environment conducive to storing body fat and often leads to binge eating due to quick hunger returns. In Traditional Korean Medicine, this phenomenon is explained through the concepts of Spleen Deficiency (Bi-heo, 脾虛) and Phlegm-Fluid (Dam-eum, 痰飮). The Spleen is the key organ responsible for digesting food and transporting nutrients. Regularly consuming foods that are 'cold' in nature or nutritionally skewed—like those found in convenience stores—weakens the Spleen's function. When Spleen Deficiency occurs, the metabolism of fluids and nutrients becomes disrupted, leading to the accumulation of Dam-eum (unmetabolized waste/phlegm) in the body. An accumulation of Dam-eum makes the body feel heavy and slows down the overall metabolism, making it harder to lose weight. In severe cases, this can lead to Blood Stasis (Eo-hyeol, 瘀血), further impairing circulation. Therefore, rather than simply calculating calories, it is crucial to warm the Spleen and restore digestive function. Many people find that relying solely on convenience store salads leads to bloating and chronic fatigue. Switching to a whole-food, natural diet is usually necessary for the body to respond properly. While you don't have to avoid all convenience store options, I recommend consulting on how to make wiser choices based on your specific constitution.