A new paper in Nature demonstrates that cold exposure inhibits tumor growth by activating brown fat and starving cancer of glucose. https://www.nature.com/articles/s41586-022-05030-3
However, they never mention ketones.
Thomas Seyfried (Cancer is a Metabolic Disease) of is big on ketone therapy for cancer – even if the ketones are exogenous. E.g., exposure to ketones in vitro inhibits tumor metabolism https://onlinelibrary.wiley.com/doi/full/10.1002/ijc.28809
Full disclosure, I co-Founded and own 42% of the ice bath company Morozko Forge so I have a stake in the success of results like these.