In vitro digestibility of dietary proteins and in vitro DIAAS analytical workflow based on the INFOGEST static protocol and its validation with in vivo data

•Reproducible in vitro digestibility workflow based on the INFOGEST protocol.•In vitro workflow for protein digestibility and DIAAS validated with in vivo data.•High correlation between in vitro and in vivo digestibility (r = 0.6, P < 0.0001)•Good agreement of in vitro DIAAR with in vivo values (r = 0.96, P < 0.0001)•In vitro protocol suited for protein quality assessment.