What is the name of the pork product in marshmallow?

The pork product commonly found in marshmallows is called Gelatin. Gelatin is derived from collagen, which is obtained from the skin, bones, and connective tissues of animals, including pigs. It is used as a gelling agent to give marshmallows their characteristic texture. Some marshmallow brands may offer vegetarian or vegan alternatives that use plant-based gelling agents instead.