<P> Glycerol ester of wood rosin, also known as glyceryl abietate or ester gum, is an oil - soluble food additive (E number E445). The food - grade material is used in foods, beverages, and cosmetics to keep oils in suspension in water . It is also used as an ingredient in the production of chewing - gum and ice cream . Similar, less pure materials (glycerol ester of gum rosin) are used as a component of certain low - cost adhesives . </P> <P> To make the glycerol ester of wood rosin, refined wood rosin is reacted with glycerin to produce the glycerol ester . </P> <P> Glycerol ester of wood rosin is an alternative to brominated vegetable oil in citrus oil - flavored soft drinks . In some cases both ingredients are used together . </P>

What is glycerol ester of rosin made from
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