Not only is this homemade bone broth in the Instant Pot full of vitamins and nutrients from the added vegetables, but it also contains a key nutrient called collagen. Collagen is why bone broth has become so popular over recent years. As we age, our bodies stop producing collagen and we can only obtain collagen through what we consume. Collagen is found in the bones and cartilage of animals. When we use the chicken carcass to make bone broth, the bones and cartilage break down under the high pressure of the Instant Pot and leach into the broth.