Yes - bone broth properly made has collagen - though not quick boiled type broth. It takes at least 24 hours of simmering the bones to extract the marrow AND requires some kind of added acid to the pot (vinegar, sour berry juice, lemon juice… maybe also rennet/intestines does the job, not sure…I use 2-4 tblsp lemon juice) - and the right kind of pot so the broth is not also extracting nickel or aluminum!
Other benefits? Well, it helps reduce cellulite, but it would be unscientific for me to say that what I can tell from my reduction of that is the collagen - was thinking it was just keto lol. I think it’s also further helped balance my hormones - as apparently collagen helps to balance insulin, cortisol, estrogen, testosterone, DHEA, melatonin, progesterone, and even HGH. And, I’d say that collagen’s anti-anxiety glycine seems to help me too - I always feel better in various ways after a winter mug or summer smoothie with it