https://www.bonappetit.com/story/what-is-pectin
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What is pectin?
Pectin is a naturally occurring thickener and stabilizer, helping jams, jellies, and fruit preserves set. Scientifically speaking, it’s a soluble fiber (a.k.a. a type of polysaccharide) found in the cell walls of most fruits and vegetables. “When heated with sugar and acid, pectin forms a kind of mesh that traps liquid,” says Camilla Wynne, author of Jam Bake. “As it cools, it sets and suspends pieces of fruit.”
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