The compound, epicatechin gallate, is a powerful and safe alternative to traditional plaque-fighting agents. Its natural abundance, affordability and lack of toxicity make it especially promising for inclusion in oral care products such as mouthwashes, offering a safer option for young children, who often accidentally swallow mouthwash.

The new study emerged as an offshoot of research into natural compounds that inhibit biofilm formation in Listeria monocytogenes, a foodborne pathogen.

As is often the case in science, the researchers made an unexpected observation that Listeria readily forms biofilms on plant materials, including most wood, but seems to avoid certain types, especially maple.