1. Bone broth

While recent research finds bone broth may not be a reliable source of collagen, this option is by far the most popular by word of mouth. Made by simmering animal bones in water, this process is believed to extract collagen. When making this at home, season the broth with spices for flavor.
“Since bone broth is made of bones and connective tissue, it contains calcium, magnesium, phosphorous, collagen, glucosamine, chondroitin, amino acids, and many other nutrients,” Davidson says.
“However, each bone broth is different because of the quality of the bones used along with other ingredients,” she adds.
To guarantee the quality of your broth, try making your own with bones obtained from a reputable local butcher.
2. Chicken

There’s a reason why many collagen supplements are derived from chicken. Everyone’s favorite white meat contains ample amounts of the stuff. (If you’ve ever cut up a whole chicken, you’ve probably noticed how much connective tissue poultry contains.) These tissues make chicken a rich source of dietary collagen.
Several studies have used chicken neck and cartilageTrusted Source as a source of collagen for arthritis treatment.