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Pediatrics

Sensitization of the reinforcing value of food: a novel risk factor for overweight in adolescents

Abstract

Background and objectives

The relative reinforcing value (RRV) of food is associated with increased energy intake and obesity and increases in RRV of food after repeated intake (sensitization) are related cross-sectionally and prospectively to higher BMI in adults. We examined the factors, such as delay discounting (DD), associated with sensitization of RRV to high energy density (HED) and low energy density (LED) food and how sensitization relates to zBMI in adolescents. We hypothesized that sensitization to HED food would be positively associated with zBMI, that sensitization to LED food would be negatively associated with zBMI, that DD would be associated with HED sensitization, and that LED sensitization and DD would moderate the relationships between HED sensitization and zBMI.

Subjects and methods

A population-based sample of 207 adolescents without obesity, aged 12–14 years was studied from June 2016–March 2019. The RRV of LED and HED foods were measured before and after two weeks of daily consumption along with zBMI and other potential factors related to eating and weight, including dietary restraint, hunger, food liking, and delay discounting (DD). Hierarchical regression models were used to determine the associations between these factors and sensitization and zBMI. We also examined LED sensitization and DD as potential moderators of the relationship between sensitization and zBMI.

Results

As hypothesized, dietary restraint and sensitization to HED food were associated with greater zBMI. Contrary to our original hypotheses, DD was not associated with sensitization, there was no relationship between sensitization to LED food and zBMI and neither LED sensitization or DD moderated the relationship between HED sensitization and zBMI.

Conclusions

Sensitization to repeated intake of HED food was associated with higher zBMI in adolescents without obesity. Sensitization may be a novel behavioral phenotype that may relate to overweight in youth.

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Fig. 1: Consort diagram showing the number of participants screened, consented, retained for five baseline visits, and included in the analysis.
Fig. 2: Outline of the flow of participant visits.

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Acknowledgements

This study was funded by NIH R01 DK106265 (JLT). We thank Lori Hazinger, Aaron Anderson, Meredith Edelman, and Alessia Galante for their years of help in collecting these data.

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Correspondence to Jennifer L. Temple.

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Temple, J.L., Ziegler, A.M., Crandall, A.K. et al. Sensitization of the reinforcing value of food: a novel risk factor for overweight in adolescents. Int J Obes 44, 1918–1927 (2020). https://doi.org/10.1038/s41366-020-0641-4

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