“Of the bitter-modulating … tested, eriodictyol, matairesinol , enterolacton, lariciresinol, and homoeriodictyol … the effect of caffeine on proton secretion by -163 ± 14.0, -152 ± 12.4, -74 ± 16.4, -58 ± 7.2, and -44.6 ± 16.5%, respectively, and reduced the bitter intensity of caffeine in the human sensory panel.”