Collagen Drinks - Do they really work?

I'm curious if anyone takes collagen supplements to help boost their skincare. I take a daily dose either Swiss or Blackmore brands for months and have not seen any noticeable improvements, probably due to my stressful work and unhealthy sleeping habits.

While I am putting in effort to manage work and sleep, I wonder if switching or taking collagen drinks would have better effects.

Any brand available for purchase/delivery in Asia would be great.

Thanks!