What collagen/supplements are the Japanese girlies taking?

What collagen are the Japanese girlies actually taking? 😭

I live in Tokyo now and everyone’s skin looks SO hydrated and smooth. I know skincare/genetics/lifestyle all play a role, but I’m curious what collagen supplements or drinks are actually popular here.

I recently tried one collagen + placenta supplement and I think my skin started reacting, so now I’m scared to experiment again 🥲

Would love recommendations from people in Japan drinks, powders, tablets, anything.