For most of culinary history, nothing on the animal was discarded. Bones, skin and joints went into the pot and stayed there for hours, and what came out was a broth that turned thick and wobbly in the cold pantry overnight. That wobble had a name long before it had a label: gelatin.
It became savory aspics, it became consommé, it became the trembling molded desserts that show up in old recipe cards and holiday photographs. In Brazilian, Portuguese and Eastern European kitchens alike, it was ordinary food — served to children, to the elderly, to anyone recovering from illness, because everyone's grandmother seemed to agree it was strengthening, even if nobody could say precisely why.
The reason is not mysterious. Gelatin is cooked collagen. When collagen is heated in water long enough, it unwinds into a form the body can actually use — and when it's broken down further into shorter chains, it becomes what labels today call hydrolyzed gelatin, or collagen peptides: the same food, made soluble enough to stir into something cold without setting into a block.
What changed is not the ingredient. What changed is that the long simmer disappeared from modern kitchens. The pot went away, and quietly, so did the collagen that used to come with it — while honey, the other pantry staple that has kept its place beside it for centuries, stayed exactly where it was.