Aesthetic Supplier in Vietnam

Hello guys, I’m from the Philippines. Lately, I’ve been doing my own research on aesthetic products like Botox, Lemon Bottle, and other fat-dissolving injections. Most of the suppliers I’ve come across are based in Vietnam, and they claim to be authorized distributors from Korea. Is this really common or legit in Vietnam? I find their prices much cheaper, which is why I got curious. I’d really appreciate your honest opinion on this.