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​ Male C57Bl/6J mice housed at thermoneutrality were administered the β-adrenergic agonist CL 316,243, and changes in oxygen consumption were continuously measured.

C57Bl/6J female mice were monitored for body temperature and metabolic rate during the dark photoperiod without food, with the blue trace representing a fed mouse and the red trace a fasted mouse exhibiting torpor (Hrvatin et al., Nature, 2020).

In vivo stable isotope tracing with U-¹³C₆ D-mannitol and U-¹³C₆ D-glucose was conducted to enable ¹³CO₂ monitoring in the Promethion indirect calorimeter, with data plotted using CalR for conventional (blue) and commensal-depleted (red) mice (Vieira et al., in press).