Why should I take protein supplements when dieting? I'm curious about the exact mechanism of how they help with weight loss.

From a modern physiological perspective, protein supplements provide the necessary building blocks for muscle synthesis. As muscle mass increases, your basal metabolic rate (BMR) rises, allowing your body to burn more energy even at rest. This effectively changes your constitution into one that resists weight gain. However, Traditional Korean Medicine (TKM) emphasizes the body's 'digestive capacity' to process such concentrated nutrients. If an individual suffers from 'Spleen Deficiency' (Biheo), where the digestive function is impaired, consuming high amounts of concentrated protein can be counterproductive. Instead of being converted into vital energy and tissue, the unabsorbed protein transforms into 'Phlegm-fluid' (Damyum). This sticky metabolic waste hinders overall circulation and often leads to weight loss plateaus. Furthermore, excessive protein intake can strain the liver and kidneys, potentially leading to the formation of 'Blood Stasis' (Eohyeol), or stagnant blood impurities. Therefore, it is crucial to first assess whether your digestive system is strong enough to assimilate these nutrients. For someone with a weak digestive fire, an ill-fitted supplement may act more like a toxin than a restorative tonic.