structural heteropolysaccharide contained in the primary cell walls of terrestrial plants and some algae

Pectin is a food supplement. It is a source of dietary fiber. It is used to make jellies and jams. Usually it comes in the form of a white powder. It is made from parts of fruit, like oranges. People use pectin to thicken things, like jelly and jam.

It is also seen as a large polysaccharide molecule found in the cell wall of many cells.