Abstract
Nine male volunteers participated in 4 gastric emptying (GE) tests of liquid equicaloric
mixtures of CHO (maltodextrins) and MCT of the following composition (% CHO-% MCT):
Drink (Dr) 1: 70%-30%, Dr2: 80%-20%, Dr3: 90%-10%, Dr4: 100%-0%. GE was measured at
rest for 90 min according to the modified double sampling technique. GE rate, expressed
as t1/2 (SEM), was 23 (2.3), 24 (1.6), 27 (2.2) and 36 (2.9) min, respectively, from drink
1 to drink 4. Statistical analysis showed that all MCT containing drinks emptied faster
than the 100% CHO drink. Two mechanisms may explain this observation: 1) the CHO content
and osmolality increases from Dr 1 to Dr 4 (both are regulators of GE); 2) MCT may
not inhibit GE as common fat does, due to a better water solubility and absorption
in the small intestine, resulting in a decreased duodenalgastric feedback.
Key words
Gastric emptying - exogenous substrates - MCT - free fatty acids - maltodextrins
