I know there are various collagen products out there.

If you make your own chicken soup from whole chicken parts (not just breasts white meat), the collagen will mix into the broth. When you put it in the frig, it will gel like jello does.
In the old days, people got most of their collagen building blocks from soups made from bones and gristle. Nothing was wasted. Today stores remove all those parts and give you
"dissected meat" with no other tissues present. Tendons removed, bones etc. So those nutrients are gone! One thing
in whole chicken soups also is the silica that is in the tendons...
our soft tissue has silica for strength, and that is also important for the joints. If you Google "foods high in silica" you'll get an idea of what veggies to add to your soup!

Just eating homemade soup like this that you control the ingredients and additives, can provide alot of collagen for tissue repair.

There is bovine, collagen in powders out there, as well as chicken. I really don't know much about them. Some people swear that collagen helps their arthritis. If you do decide to
use a supplement buy only from well known reputable companies. I think quality of the products may be the major factor for you in making this decision.