Collagen is a natural protein found in foods like chicken, fish, and bone broth. It is also found in other animal products like pork, beef, and organ meats. Here are some foods that are high in collagen:

1. Bone broth: Made by simmering animal bones and connective tissue for an extended period of time, bone broth is a great source of collagen.

2. Fish with skin on: Fish are an excellent source of collagen, especially if you leave the skin on. Much of the collagen found in fish is stored in the skin.

3. Chicken: Chicken contains all of the amino acids your body needs to produce collagen, with the chicken tissues offering a rich source of dietary collagen.

4. Citrus fruits: Fruits like oranges, lemons, limes, and grapefruits are packed full of vitamin C, which plays a significant role in producing the precursor to collagen.

5. Legumes: Legumes are also one of the best foods for collagen, as they are naturally rich in protein and provide a source of copper, which is necessary for collagen production.

6. Nuts and seeds: Cashews, almonds, and chia seeds are rich in copper, which boosts the bodys ability to create collagen.

Its important to note that while some foods are high in collagen, the body breaks down collagen into amino acids during digestion, so its unclear whether eating collagen-rich foods directly benefits skin or joint health. However, eating a diet full of protein-rich foods, whether from plant or animal sources, can help supply the body with the amino acids needed for collagen production.