There are too many tonic manufacturers and brands now, and they all say yes. The brands in Hong Kong are mainly "champions", but they are actually average.

It is ok to eat Kangbit in China. Many bodybuilding champions eat it, and it is very cheap. It's more convenient to buy it in a health club. It's probably hard to ask about things online (if you're not an acquaintance). Eating badly is not a trivial matter, and it is likely to be free.

If it's just fitness, it's enough to eat creatine and protein powder, without other matrix proteins and purified proteins, and there is no competition.