The present disclosure relates to methods of assessing the ability of a test oral care flavour ingredient or a test oral care flavour composition to improve the invigoration state of a human subject and of creating oral care flavour compositions having an invigorating effect on a human subject. It further relates to oral care flavour compositions for improving the invigoration state of a human subject, to consumer products comprising such oral care flavour compositions, and to methods of improving the invigoration state of a human subject.