TanninsHydrolyzable TanninsAbsorptionIntestinal AbsorptionProanthocyanidinsAstringentsAcaciaPlant ExtractsFagaceaeAnacardiaceaeSkin AbsorptionBiological AvailabilityTerminaliaCorylusPhenolsSpectrophotometry, AtomicByssinosisX-Ray Absorption SpectroscopyJejunumGallic AcidPlants, MedicinalPlant BarkFabaceaeDiospyrosIronPolyphenolsProline-Rich Protein DomainsSpectrophotometry