📝 Detailed Answer
To be honest, I also reach for coffee or diet drinks out of habit when I'm busy. However, I've often struggled with dizziness or insomnia after consuming them. Through my own trial and error, I realized that a drink that acts as a tonic for someone else can actually be detrimental to my own body.
Of course, there are clear advantages. They are easily accessible and provide an instant mood lift. The light hydration and temporary stimulant effect can provide a brief burst of energy.
However, there are distinct drawbacks. Products with high caffeine or potent active ingredients can actually impair digestive power in those with Spleen Deficiency (脾虛, Bi-heo), a state where the digestive system is functionally weak. For those with a constitution prone to Phlegm-Fluid accumulation (痰飮, Dam-eum), these drinks can hinder fluid metabolism and lead to increased bloating or edema.
Therefore, it is difficult to give a definitive answer as to 'which product is the best.' This is because innate constitutions and current physiological states vary greatly from person to person.
If you experience heart palpitations, insomnia, or bloating after drinking these beverages, please view it as a warning signal from your body. It is far more efficient to first assess your body's Qi flow and the state of Blood Stasis (瘀血, Eo-hyeol) to find a tailored regulation method. I encourage you to visit the clinic so we can analyze your specific constitution together.