“…Furthennore, no individual subject had a mean two hour tryptic activity below the normal range of 7-38i mol H+ min-' ml-' (Mottaleb, Kapp, Noguera, Kellock, Wiggins & Waller, 1973), nor a jejunal bile acid concentration below that necessary for micellar solubilization of a normal dietary load of fat (4pmol/ml according to Badley, Murphy & Bouchier, 1969).…”