I also find myself grabbing a drink at Starbucks when my energy flags during clinical practice. While Americanos are the go-to for many dieters, from the perspective of Traditional Korean Medicine, there are several factors to monitor. Caffeine has the benefit of elevating Yang (陽) energy, which temporarily boosts metabolism. Pure teas are also excellent for discharging metabolic waste from the body without the burden of calories. However, there are clear cautions. Habitual coffee consumption can lead to the accumulation of 'Stomach Heat' (Wi-yeol), which can actually make you feel hungry more frequently. Furthermore, caffeine tends to deplete 'Body Fluids' (Jin-yeok), the essential moisture in our bodies, leading to dry skin and poor sleep quality—both of which plummet weight loss efficiency. Specifically, if you have a 'Spleen Deficiency' (Bi-heo) constitution with weak digestion, you should avoid iced coffee on an empty stomach; this can severely dampen your digestive fire and cause bodily swelling or edema. For those with excess internal heat, I recommend cooling herbal teas, while those with a cold constitution or low energy should opt for warm tea or a light Americano. The smartest choice for a healthy weight loss journey is to listen to your stomach's condition rather than following popular trends.