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Intense Sweeteners, Taste Receptors and the Gut Microbiome: A Metabolic Health Perspective

Turner, Alexandria; Veysey, Martin; Keely, Simon; Scarlett, Christopher J.; Lucock, Mark; Beckett, Emma L.

Authors

Alexandria Turner

Martin Veysey

Simon Keely

Christopher J. Scarlett

Mark Lucock

Emma L. Beckett



Abstract

Intense sweeteners (IS) are often marketed as a healthier alternative to sugars, with the potential to aid in combating the worldwide rise of diabetes and obesity. However, their use has been counterintuitively associated with impaired glucose homeostasis, weight gain and altered gut microbiota. The nature of these associations, and the mechanisms responsible, are yet to be fully elucidated. Differences in their interaction with taste receptors may be a potential explanatory factor. Like sugars, IS stimulate sweet taste receptors, but due to their diverse structures, some are also able to stimulate bitter taste receptors. These receptors are expressed in the oral cavity and extra-orally, including throughout the gastrointestinal tract. They are involved in the modulation of appetite, glucose homeostasis and gut motility. Therefore, taste genotypes resulting in functional receptor changes and altered receptor expression levels may be associated with metabolic conditions. IS and taste receptors may both interact with the gastrointestinal microbiome, and their interactions may potentially explain the relationship between IS use, obesity and metabolic outcomes. While these elements are often studied in isolation, the potential interactions remain unexplored. Here, the current evidence of the relationship between IS use, obesity and metabolic outcomes is presented, and the potential roles for interactions with taste receptors and the gastrointestinal microbiota in modulating these relationships are explored.

Journal Article Type Article
Publication Date Jun 8, 2020
Journal International Journal of Environmental Research and Public Health
Publisher MDPI
Peer Reviewed Peer Reviewed
Volume 17
Issue 11
Article Number 4094
APA6 Citation Turner, A., Veysey, M., Keely, S., Scarlett, C. J., Lucock, M., & Beckett, E. L. (2020). Intense Sweeteners, Taste Receptors and the Gut Microbiome: A Metabolic Health Perspective. International Journal of Environmental Research and Public Health, 17(11), https://doi.org/10.3390/ijerph17114094
DOI https://doi.org/10.3390/ijerph17114094
Keywords Sweetener; Non-nutritive sweetener; Taste receptor; Gut microbiome; Obesity; Metabolism; Gut hormone
Publisher URL https://www.mdpi.com/1660-4601/17/11/4094

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Copyright Statement
©2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open accessarticle distributed under the terms and conditions of the Creative Commons Attribution(CC BY) license (http://creativecommons.org/licenses/by/4.0/).





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