What are the effects of traditional Korean medicine on weight loss?

A friend of mine who took herbal medicine for dieting lost a noticeable amount of weight in three months.

Since I started taking herbal medicine, I haven't had much appetite, so I haven't eaten much, and I heard I naturally lost weight.

I'm curious whether only this friend experiences this or if others see similar effects.

I'm considering whether to try traditional medicine because the price isn't cheap.

What are your actual reviews of trying traditional Korean medicine for dieting?