has anybody used hyaluronic acid?

I remember a while back, someone mentioned using it and reported an increase in their lip size. I was just wondering if anybody else has taken it with good results.

supposedly, it is very important for the skin, eyes, joints and lips.

I'm interested in trying it, for all these reasons (fuller lips sounds great, especially if it helps keep them hydrated. I have sensitive eyes and my knees have never been that great. )

so, anyone??

:-)