Pectin is a structural polysaccharide,found in fruit and vegetable and mainly prepared from citrus peel,In plant,it is a natural gelling agent,In general high methoxyl-pectin is 50% or greater esterified,while low methoxyl is 50% or less.As an innocuous natural food additive,pectin is extensively used in food industry.It is a fine gelling,stabilizing,thickening,suspending and emulisifying agent.When a food has a pure natural appearing,it is often the result of pectin presence.