Both. For the former you can start with success stories on the keto subreddit. For the latter there is decades of research on the subject. You can start with this talk: https://www.youtube.com/watch?v=tC_qBC1EEvw
> Not necessarily talks by professors, but scientific papers published in respectable journals or on NCBI
well the professor in the talk has published dozens of papers so it's a good way to start. I'm not going to provide you with a literature review sorry :)