How long does the body take to regenerate hyaluronic acid?

I had tear trough filler four years ago, which started accumulating liquid and turning into under eye bags. I had them dissolved with Hyaluronidase, which unfortunately also removed my own natural hyaluronic acid. (This is shown by photos and please do not tell me it is impossible.) I am wondering if there are any studies or clinical experience regarding how long it takes for the body to regenerate its own look - if it does at all?