Q. At what age can I start taking it and up to what age?

I understand that concern very well because I too have made mistakes in the past—trying random fasting methods or following popular trends—only to end up damaging my body. What matters more than age is the current 'functional' state of your body. We typically approach each age group as follows: 1. Growth period and adolescents: Instead of simply reducing the dosage, we focus on normalizing metabolism. If Qi and Blood (氣血) become deficient, it can interfere with growth and learning. 2. Working adults in their 30s-40s: Despite lower activity levels, stress is high, often resulting in Phlegm-dampness accumulation (痰飮, a sticky state of accumulated waste products). We must first remove these waste products to restore smooth metabolism. 3. Middle-aged adults 50 and above: Due to hormonal changes, Spleen deficiency (脾虛, weakened digestive function and energy production) symptoms easily develop. Rather than aggressive suppression, the key is to tonify Qi energy while regulating weight. 4. Those with underlying conditions: If you have diabetes or hypertension, an even more careful approach is necessary. We may incorporate formulas that help remove Blood stasis (瘀血, stagnant 'bad blood') to support blood circulation, ensuring safe progression. Ultimately, Traditional Korean Medicine for weight management is not simply a 'weight-loss drug'—it is a process of finding balance appropriate to your age. I recommend that we explore together what state your body is currently in and find the safest path forward.