Academic article

Hydrocolloids for enhancing satiety: Relating oral digestion to rheology, structure and sensory perception

Morell, P.; Fiszman, S.M.; Varela-Tomasco, Paula; Hernando, I.

Publication details

Journal: Food Hydrocolloids, vol. 41, p. 343–353, 2014

International Standard Numbers:
Printed: 0268-005X
Electronic: 1873-7137

Open Access: none

Links:
DOI

Satiety expectations can be closely related to the structural changes that take place in the mouth. An
important role of hydrocolloids is to impart viscosity, which has a key effect on the feelings of richness,
mouthcoating and fullness. In this study, native and modified corn starch, l-carrageenan and guar gum
were used to formulate milkshakes. Expected satiety was rated (106 consumers) and the perception of
various attributes was studied. The rheological properties of the milkshakes without and with added
saliva were analysed and observed with a light microscope during in vitro oral digestion.
Disintegration of the swollen starch granules by saliva was observed mainly in the modified starch
sample. The structure of the milkshakes prepared with l-carrageenan and guar gum was preserved
better. It could be hypothesized that the starch would provide lower expected satiety due to the
extensive in-mouth disintegration. However, the sensory analysis showed that the modified starch
milkshakes obtained the highest expected satiety scores, with consumers finding them homogeneous,
thick in the mouth and very creamy. These results suggested that consumers related satiety more with
the thick and creamy characteristics at the very start of the consumption than with the loss of structure
in mouth. Sensory properties affect the assessment of the satiating capacity, especially texture, which is
directly related to the orosensory exposure and, therefore, to the feeling of fullness that the milkshakes
elicit. The present study casts light on the factors affecting in-mouth perception of different hydrocolloids
used to design foods with enhanced satiety.