Certo has helped generations of jam makers to achieve great tasting jams, jellies and marmalades, time after time. Certo is made from the skins of pressed apples or citrus fruit, natural sources of pectin. Pectin is a soluble fibre that works as a natural gelling agent. Certo is the only liquid form of pectin and helps jam makers achieve dependable results every time. Using Certo helps achieve a consistent set. Certo Liuid pectin has been trusted by home cooks and chefs give improve the taste of not only jams,jellies,and marmalades due to reducing the time needed to boil the fruit which reduces the taste by allow the home made jams and jellys to set consistantly.