Whey protein seems to
have been rather neglected in this regard. To date no specific peptides
derived from whey have been identified as GLP-1 or GIP secretagogues,
and although there is some suggestion that intact
whey protein may stimulate GLP-1 secretion (Geraedts, Troost,
Fischer, Edens, & Saris, 2011) it has not been established which
proteins could be responsible.