Coffee is consumed worldwide, but there are different types of espresso blends, each with its unique concentration of caffeine, which can have different effects on the human being. The aim of this study was to understand the effect of the impact of caffeine on the autonomic nervous system, evaluating the physiological changes and subjective responses due to different levels of caffeine intake. A double-blind tasting task consisting of one within-subject factor design (caffeine level: high / double caffeine mixture (blend A) vs single-charge caffeine mixture (blend B) vs low-caffeine mixture (blend c) allowed us to assess participants’ autonomic responses using Heart Rate Variability (HRV) and Pupillary Reactivity (PR). Arousal was also assessed through the Self-Assessment Manikin (SAM). Results revealed statistically significant differences in HRV and PR between coffee blends, showing the blend A,a more pronounced autonomic response that blend C. However, no significant differences were found in arousal level among coffee blends. These results are similar to previous research that pointed out to a discordance between subjective and objective measures when caffeine is consumed.

This study aims to identify the main applications of metaverse in business based on scientific publications. More specifically, the chapter aims to identify conceptual frameworks used in the literature. The authors conducted a systematic review based on the Web of Science and Scopus databases to achieve the objectives. This study followed a systematic literature review methodology consisting of protocol development, identified inclusion, and exclusion criteria for relevant publications; data extraction; and synthesis. The research resulted in 26 articles, which were identified and classified according to applications to the business environment, concluding that the main implications and applications of the metaverse in the business environment focus on an integrative framework that includes ethical issues, innovation management, marketing management, and knowledge management. This research has put down the foundation for establishing metaverse as a research topic in business research. With this study, the contribution lies both at the theoretical and practical levels.