Pectin is a complex versatile heteropolysaccharide of great importance to food, pharmaceutical and cosmetic industries. Pectin, a plant-derived polysaccharide, is highly valued for its gelling, thickening, and stabilizing properties, with extensive applications in the food and pharmaceutical industries. pectin, any of a group of water-soluble carbohydrate substances that are found in the cell walls and intercellular tissues of certain plants. In the fruits of plants, pectin helps keep the walls of adjacent cells joined together. » Pectin is a purified carbohydrate product obtained from the dilute acid extract of the inner portion of the rind of citrus fruits or from apple pomace. It consists chiefly of partially methoxylated polygalacturonic acids.