Abstract
Purpose
To evaluate the changes in gustatory and olfactory sensitivity and dietary habits between healthy lean subjects (LS) and participants affected by overweight (OW), stage I and II obesity and to estimate possible impact of these factors on body mass index (BMI).
Methods
After a general and ear–nose–throat evaluation, taste and olfactory function testing by means of taste strips and sniffin’ stick tests, respectively, and food habits analysis by means of food frequency questionnaire (FFQ), 221 participants (68 LS [33 female; mean age = 53.01 ± 7.54 years]; 51 OW [26 female; mean age = 51.5 ± 12.16 years]; 50 stage I obesity [24 female; mean age = 50.78 ± 13.71 years] and 52 stage II obesity [24 female; mean age = 52.21 ± 13.35 years]) were enrolled in the study.
Results
Significant (p < 0.008) reductions in total and subtest taste and smell scores were found in stage I and II obesity when compared to LS and OW participants. FFQ depicted a progressive intake increase of nutrients along the BMI stages. Significant associations were found between BMI and taste/smell subtests sugar taste carbs, saturated, monounsaturated and polyunsaturated fatty acids.
Conclusions
These data demonstrated for the first time a parallel impairment in smell and taste in a large sample size of participants from lean to stage II obesity and could reinforce those previous theories claiming that the greater the ability in taste or smell qualities perception, the lower the preference for them, resulting in a lower intake of specific foods.
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Data availability
The data are subject to national data protection laws. Therefore, data cannot be made freely available in a public repository. However, the datasets generated from the current study are available from the corresponding author on reasonable request.
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Conceptualization AM and MA; methodology AM, SMS, SM, AV, IM, BM and VC; formal analysis AM, SMS, MA, VC, AV and SM; data curation, AM, SMS, SM, IM, and AV; writing—original draft preparation AM, MA, SMS, SM and AV; writing—review and editing AM, SM, SMS, AV, BM, SC, VC, MA; supervision AM, SMS, SC, MA, IM, SM and AV. All authors have read and agreed to the published version of the manuscript.
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Micarelli, A., Malacrida, S., Vezzoli, A. et al. Smell, taste and food habits changes along body mass index increase: an observational study. Eur Arch Otorhinolaryngol 280, 5595–5606 (2023). https://doi.org/10.1007/s00405-023-08204-5
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DOI: https://doi.org/10.1007/s00405-023-08204-5