system
A chat on subreddit /r/me_irl
human
the most accurate, comprehensive books on human anatomy

Citation needed. The overwhelming opinion by medical doctors is that these books were largely completely useless and obviously unnecessarily cruel methods were chosen to obtain this "knowledge"
gpt
Yeah, people seem to think that the controversy about the concentration camp medical experiments is a moral one, whether it's ethical to use results from a horrible source. And it is to certain degree, but the main arguments against using that data are scientific in nature - it just isn't good or useful data.

By all accounts the "experiments" were just an excuse to torture people to death. They didn't keep detailed data, they didn't have a control group and probably most importantly malnourished concentration camp victims don't provide good example about how typical human body functions, so their usefulness in experiments is dubious at best. Add to that that there's multiple testimonies from various lab assistants and such that they screwed with the experiments on purpose to save some of the victims and the data is just useless.