In Singapore importing chewing gum is a criminal offense. Rosin can be used as a glazing agent in medicines and chewing gum. A review about the cognitive advantages of chewing gum by Onyper et al. This is a list of chewing gum brands in the world. Nicorette chewing gum releases nicotine while chewing. It is one of the world's largest producers of chewing gum. Polymers, including elastomers, are responsible for the stretchy and sticky nature of chewing gum. The polymers that make up the main component of chewing gum base are hydrophobic. This finding suggests that the effect of chewing gum is domain specific. Beeswax is also a common ingredient of natural chewing gum. Trident is a brand of sugar-free chewing gum. Individual seeds are sometimes chewed and used in much the same way as chewing gum. He is also seen bluntly serving as a spokesperson for Big Red chewing gum. Other uses include shoe heels and soles, gaskets, and even chewing gum. Teaberry extract can be used to flavor tea, candy, medicine and chewing gum.