... properties, antigrowth, antiherbivore and anti-insect properties, have also been demonstrated.The Application of Usnic Acid Usnic acid has ... in medicine, perfumery, cosmetics, and ecology.Usnic acid has been included as an ingredient in creams, powders, toothpastes, mouthwash, deodorants, hair ... its salt form, sodium usniate, have been marketed in the US as an ingredient in food supplements for use in ...