We thank Martinez-Tellez and co-authors for their interest in our article. Martinez-Tellez et al. are quite right in their statement that there are more factors involved in activation of human BAT than we described in our article [1]. However, the main aim of our manuscript was to speculate on/discuss the potential influence of facial cooling in the activation of BAT and therefore we did not focus on other differences between the publication of Admiraal et al. and Bakker et al. [2,3].
