Compared with the SV meal, HV was consumed at a slower eating rate (P = 0.020), with postprandial hunger and desire to eat being lower (P = 0.019 and P<0.001 respectively) while fullness was higher (P<0.001). After three hours, the participants were provided with an ad libitum pasta meal. The plasma samples were assayed for insulin, glucose-dependent insulinotropic peptide (GIP), glucose and acetaminophen. At regular intervals during the three hours following the meal, subjective appetite ratings were measured and blood samples collected.
Each participant consumed a 1690 kJ portion of a standard viscosity (SV) and a high viscosity (HV) semi-solid meal with 1000 mg acetaminophen in two separate sessions. Fifteen healthy males participated in the randomized cross-over study. However, whether a subtle change in viscosity of a semi-solid food would have a similar effect on appetite is unknown. It has been shown that solid foods have a stronger satiating effect than their liquid equivalent. Understanding the impact of rheological properties of food on postprandial appetite and glycemic response helps to design novel functional products.
