Spruce gum
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Spruce gum is made from the sap of spruce trees. In North America, it is known that spruce gum was chewed by the Native Americans. Spruce gum was later introduced to the early American pioneers and was sold commercially by the 19th century. As newspapers' popularity grew, more spruce trees were used to manufacture them. Hence, there weren't many trees by the 20th century left and no latex, causing the decline of spruce gum. It is mentioned in the book A Day No Pigs Would Die by Robert Newton Peck.
Spruce gum is a NON comercial gum. most available flavoures are mint and fruit.