What is chewing gum made of? © Getty Images

What is chewing gum made of?

Whether there are any benefits to chewing gum, it can't hurt to know what's inside - can it?

Asked by: Willem Davies, Bradford

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Chewing gum has been with us since the Stone Age – chicle gum was made from the sap of the Sapodilla tree. Most modern gums are based on a synthetic equivalent, a rubbery material called polyisobutylene that’s also used in the manufacture of inner tubes. Polyisobutylene is mixed with plasticisers and materials – all food grade – to make the gum mixture chewable.

The success of chicle and polyisobutylene lies partly in the narrow temperature range over which materials soften. So a material that’s firm and easy to mould becomes soft and pliable in the warmth of the mouth.


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