Bones are a good source of various minerals, collagen (called gelatin once cooked) and also amino acids such as proline and glycine. “Collagen” literally means “glue producing” and it is what holds our bones together. Collagen is found in animal muscles, bones, skin, tendons, blood vessels and the digestive system too. Collagen and amino acids are needed as building blocks for our own collagen production and many critical functions in our body.
Two of the best reasons for cooking with “good” fat are, of course, excellent flavor and enhanced absorption of vitamins.