Read the text and determine if the sentence is true:

Mentha diemenica is known by the common name of slender mint. The species is named after Van Diemen's Land, which is now called Tasmania. It is a mint species within the genus "Mentha", native not only to Tasmania but also to Queensland, New South Wales, Victoria, and South Australia.

Sentence: Mentha diemenica is often used in toothpaste
It's impossible to say