The gelatin in Jell-O is what lets you transform it into all sorts of different shapes.
Gelatin is just a processed version of a structural protein called collagen that is found in many animals, including humans.
The gelatin you eat in Jell-O comes from the collagen in cow or pig bones, hooves, and connective tissues.
To make gelatin, manufacturers grind up these various parts and pre-treat them with either a strong acid or a strong base to break down cellular structures and release proteins like collagen
Gelatin is easily extracted because it forms a layer on the surface of the boiling mixture.
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