Postprandial response and diurnal variation of serum cationic trypsin-like immunoreactivity in man.

In eight healthy volunteers a standard test meal caused an early, transient, but significant increase in serum cationic trypsin-like immunoreactivity (CTLI). Serum CTLI was studied for 24 h in another six healthy volunteers who had four regular meals and performed their usual activities. It showed a diurnal variation with significantly higher values in the late evening and early night than the initial morning value.