In Latin American Kitchens they say "Good Bone Broth Resurrects the Dead." If you have only been doing chicken broth I highly recommend you graduate to the much more gelatinous beef broth. However, I have taken my lamb bones, duck bones, and pork bones and made broth with all of them, sometimes mixing them together. And I suggest roasting the beef bones and eating the marrow as well before throwing them into the crock pot for 24, 36 or 48 hours. I have a cup first thing in the am and sometime in the evening.

How bone broth became Kobe Bryant’s secret Stone Age weapon
www.washingtonpost.com
It may be trendy -- paleo dieters swear by its benefits -- but bone broth has been around for ages. Still, research-based evidence of its efficacy remains light.