Transporting a single individual is the transport of a “Bag of mostly water” together with its myriad contents AND then replacing these contents as needed AND discharging from that bag used contents.
Remember that there are many differing contents of earthen life in that bag. Remember too that there are many different types of bag all of which constitute a part of earthen life.
Science fiction barely talks of these complicating factors but it does get us started thinking (As here.). A good place to start on earth colonization before we even get to the means are the thoughts of Christopher Smith, a leading anthropologist at the University of Portland in a talk he gave at the Perimeter Institute. See: Interstellar Voyaging