yes your right gelatin comes from the bones well gelatin is the result of the collagen the protein or mineral or what ever is in the bone you know how a stock is made like a chicken stock or a beef stock its made from animal bones and meats with carrots and cellary and onions and herbs and spices and then its thrown into a pot of boiling water where its then left to a simmer for 6 to 8 hours then you seperate the liquid from the solids let it cool and your left with a thick jelly like substances so yes your right your smart after all
