If ketosis was dangerous, our ancestors would have died every winter when plant food disappeared.
— Sama Hoole (@SamaHoole) January 15, 2026
Ice Age Europe: No berries for 6 months. No vegetables. No fruit. Just fatty megafauna.
Your body entering ketosis to burn fat for fuel in the absence of carbohydrates isn't a… pic.twitter.com/nNeRZ6CBun
If ketosis was dangerous, our ancestors would have died every winter when plant food disappeared. Ice Age Europe: No berries for 6 months. No vegetables. No fruit. Just fatty megafauna. Your body entering ketosis to burn fat for fuel in the absence of carbohydrates isn't a metabolic emergency. It's the default survival mode humans used for hundreds of thousands of years. Imagine the evolutionary pressure if ketosis caused the catastrophic problems modern doctors claim: "Sorry tribe, I know we have unlimited seal blubber and caribou fat, but if we eat it we'll enter ketosis and die. Best to just starve instead." Natural selection would have eliminated anyone whose body couldn't run on fat within one generation. The fact that you exist means your ancestors spent significant portions of their lives in ketosis and thrived. Modern medicine treats this ancient survival mechanism as a pathological state requiring medical intervention. Your body has been doing this successfully since before agriculture existed. But please, continue eating every 3 hours to "keep your blood sugar stable" like humans definitely did for 2.5 million years.