Q. Do I really need to drink protein shakes when dieting? I'm curious about exactly how they actually help.

Many people start diets with excessive enthusiasm and try extreme fasting, only to experience dizziness and extreme fatigue. This underscores how critical nutritional balance is for a sustainable diet. When the body lacks energy, it begins breaking down muscle tissue for fuel. If protein supply is interrupted during this process, muscle mass decreases and the basal metabolic rate plummets, which ironically makes it easier to regain weight and harder to lose it. This is why utilizing supplements like shakes to provide the necessary 'building blocks' for muscle is beneficial. In Traditional Korean Medicine (TKM), this state of weakness and poor nutrient absorption is often associated with Spleen Deficiency (Bi-heo, 脾虛). When the Spleen's function is impaired, the body struggles to transport nutrients efficiently. For those with diminished digestive capacity, insisting solely on heavy meats can burden the stomach and lead to the accumulation of Phlegm-Fluid (Dam-eum, 痰飮), a type of metabolic waste. In such cases, liquid proteins can provide essential nutrition while minimizing the digestive load on the gastrointestinal tract. However, it is important to remember that shakes are merely 'supplements.' Relying solely on liquids can leave the psychological urge to chew unsatisfied, increasing the risk of binge eating later. The ideal approach remains a balanced diet consisting of seasonal, whole foods. I recommend using shakes as a 'minimum line of defense' during a hectic workday. If you would like to know the optimal protein intake based on your specific digestive health and constitution, please feel free to ask.