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Home Exclusive Cognitive Science

Study finds a higher sensitivity to sweet and salty tastes among obese individuals

by Eric W. Dolan
May 27, 2017
in Cognitive Science
(Photo credit: ArtFamily)

(Photo credit: ArtFamily)

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Researchers from the Max Planck Institute for Human Cognitive and Brain Sciences and the German Institute of Human Nutrition have found a link between taste perception and body mass index.

“Our findings suggest that higher body mass is associated with higher sensitivity to, and subjective strength experience of salty and sweet taste,” wrote the authors of the study, which was published in the peer-reviewed journal Appetite.

The researchers recruited 31 participants with a BMI under 25 (the lean group) and 23 participants with a BMI over 30 (the obese group).

The researchers tested the participants taste perception by having them drink mineral water with varying concentrations of sucrose (sweet), sodium chloride (salty) , citric acid (sour), and quinine hydrochloride (bitter).

The obese participants were significantly more likely to detect sweet and salty tastes at lower concentrations, suggesting they were more sensitive to these tastes.

The obese participants also rated the same concentrations of sweet, salty, and sour as significantly more intense than lean participants.

“The group differences in sweet and salty taste are of particular interest for eating behaviour and energy intake, and with that for obesity research, as these taste qualities provide information regarding the nutritional value of food,” the researchers said.

Sweetness is an indicator that the food contains certain carbohydrates, while saltiness indicates that the food contains sodium and other minerals.

The findings, however, appear to contradict some previous research that found reduced taste abilities in obese individuals.

“We believe that the discrepancies are grounded in methodological but also conceptual differences in measuring taste sensitivity,” the researchers wrote in their study. “Comparisons of taste perception in lean and obese groups have also continually suffered from the drawback of small sample sizes.”

More research is needed to make sense of the different findings.

The study, “Higher sensitivity to sweet and salty taste in obese compared to lean individuals”, was authored by Samyogita Hardikar, Richard Höchenberger, Arno Villringer, and Kathrin Ohla.

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