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Caffeine as a flavor additive in soft-drinks

Keast, Russell and Riddell, Lynette 2007, Caffeine as a flavor additive in soft-drinks, Appetite, vol. 49, no. 1, pp. 255-259.

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Title Caffeine as a flavor additive in soft-drinks
Author(s) Keast, Russell
Riddell, Lynette
Journal name Appetite
Volume number 49
Issue number 1
Start page 255
End page 259
Publisher Elsevier B.V.
Place of publication Amsterdam, The Netherlands
Publication date 2007-07
ISSN 0195-6663
1095-8304
Keyword(s) caffeine
soft-drink
flavor
threshold
psychophysics
obesity
Summary Over 60% of soft-drinks sold in the United States contain caffeine, a mildly addictive psycho-active chemical, as a flavor additive. Using sweeteners as controls, we assessed whether caffeine has flavor activity in a cola soft-drink. A forced-choice triangle discrimination methodology was used to determine detection thresholds of caffeine in sweeteners and a cola beverage. The subjects (n=30, 28 female, 23±4 years old) were trained tasters and completed over 1600 discrimination tests during the study. The mean detection thresholds for caffeine in the sweet solutions were: 0.333±0.1 mM sucrose; 0.467±0.29 mM aspartame; 0.462±0.3 mM sucralose, well below the concentration in common cola beverages (0.55–0.67 mM). A fixed concentration of caffeine, corresponding to the concentration of caffeine in a common cola beverage (0.67 mM) was added to the sweeteners and a non-caffeinated cola beverage. Subjects could distinguish between caffeinated and non-caffeinated sweeteners (p<0.001), but all subjects failed to distinguish between caffeinated and non-caffeinated cola beverage (p=1.0). Caffeine has no flavor activity in soft-drinks yet will induce a physiologic and psychologic desire to consume the drink.
Language eng
Field of Research 170112 Sensory Processes, Perception and Performance
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2006, Elsevier Ltd
Persistent URL http://hdl.handle.net/10536/DRO/DU:30003641

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