Menthol is the chemical ingredient that creates that recognizable ... The herb’s most well-known use is in Wrigley’s Extra Spearmint Gum (you know the one!), so it might come as a surprise ...
The crucial ingredient is believed to be rosmarinic ... “I would skip the spearmint gum,” advises Meshalum. “It tends to not actually have any spearmint in there and instead is flavored ...