In the published article, there was an error in Figure 3 as published. A mistake in the conversion of units due to human error resulted in the values being an order of magnitude too high and the incorrect figure was included in the published article (incorrect and corrected calculation have been provided to the editor/journal for verification). As per the Weir equation (Cunningham, 1990) energy expenditure is calculated in kilocalories (kcal/min). When converting kcal to kilojoules (kJ/min), the correct formula: kcal × 4.184. The authors accidentally used: kJ × 4.184. In an early draft of the manuscript, we converted kcal/kg/min into kJ/kg/min to report the data in SI units, as is required for some publications. In the process a mistake due to human error resulted in the incorrect data being included in Figure 3. The corrected Figure 3 and caption appear below.
FIGURE 3
Also, due to the above error, the results section states incorrect values for the energy expenditure in reference to Figure 3.
A correction has been made to the results section, Caffeine and C. annuum effects on total on total energy expenditure, paragraph number, 2. The corrected paragraph is given below:
“For day 1 energy expenditure, a significant interaction effect (F (2, 21) = 23.13, p < .001, Figure 3A) was found. Post-hoc analysis revealed that both caffeine (3.34 ± .13 kcal/kg/min) over the 120-min intervention period and C. annuum fruit powder (2.92 ± .34 kcal/kg/min over 120 min) significantly increased the rate of energy expenditure compared to placebo (1.95 ± .21 kcal/kg/min over 120 min; Figure 3A). Similarly, for day 7, a significant interaction effect (F (2, 21) = 23.13, p < .001, Figure 3B) was found. Post-hoc analysis revealed that caffeine (3.18 ± .16 kcal/kg/min) and C. annuum fruit powder (3.13 ± .17 kcal/kg/min) significantly increased the rate of energy expenditure compared to placebo (1.8 ± .15 kcal/kg/min; Figure 3B). No significant day interaction effect was found for energy expenditure.”
The authors apologize for this error and state that this does not change the scientific conclusions of the article. The original article has been updated.
Statements
Publisher’s note
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article, or claim that may be made by its manufacturer, is not guaranteed or endorsed by the publisher.
Summary
Keywords
thermogenesis, substrate utilisation, capsaicin, glucose use, infra-red thermography (IRT), energy expenditure (EE), randomized double-blind placebo and positive-controlled crossover trial
Citation
Van Schaik L, Kettle C, Green R, Wundersitz D, Gordon B, Irving HR and Rathner JA (2023) Corrigendum: Both caffeine and Capsicum annuum fruit powder lower blood glucose levels and increase brown adipose tissue temperature in healthy adult males. Front. Physiol. 13:1127730. doi: 10.3389/fphys.2022.1127730
Received
19 December 2022
Accepted
21 December 2022
Published
10 January 2023
Volume
13 - 2022
Edited and reviewed by
Da-wei Zhang, University of Alberta, Canada
Updates
Copyright
© 2023 Van Schaik, Kettle, Green, Wundersitz, Gordon, Irving and Rathner.
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
*Correspondence: Lachlan Van Schaik, lachlan.vanschaik@unimelb.edu.au
This article was submitted to Metabolic Physiology, a section of the journal Frontiers in Physiology
Disclaimer
All claims expressed in this article are solely those of the authors and do not necessarily represent those of their affiliated organizations, or those of the publisher, the editors and the reviewers. Any product that may be evaluated in this article or claim that may be made by its manufacturer is not guaranteed or endorsed by the publisher.