The tests were done by extracting mouse mitochondria and then putting them into a "respiration buffer" or "appropriate buffer" and then conducting various tests using various compounds and combinations of compounds.
Therefore, the tests done in the poster are "in-vitro" tests.
As such, they can only be used for very narrow purposes. amstocks82
definition in Wikipedia:
Studies that are in vivo (Latin for "within the living"; often not italicized in English[1][2][3]) are those in which the effects of various biological entities are tested on whole, living organisms, usually animals, including humans, and plants as opposed to a partial or dead organism. This is not to be confused with experiments done in vitro ("within the glass"), i.e., in a laboratory environment using test tubes, petri dishes, etc.