Candidate drugs in longevity studies are typically administered via food, not intravenously or intramuscularly, due to the labor-intensive nature of injections and the need for a separate control group for sham injections.

“yes this is correct there's a footnote which I'll get to we could give a a drug in water if there was some reason in which it wouldn't get into the food but you could give it in the water this would be compatible with our protocol we we can't give it to animals intravenously or intramuscularly because it's so much work to give we have you know 150 males 150 females giving 300 shots a day or a week or a month would be a mess in addition to which we'd have to have a separate control group that got a sailing shot and we couldn't use regular old mice as our control we'd have to have a separate control group to do that”