As in a hot flash? Listening to today's bonus interview https://forum.lowcarber.org/showthread.php?t=481843. with Keto dietician Beth Zupec-Kania. Her own experience using Ketone breath meters showed her hot flashes were in response to the hormone insulin rise after eating carbs. Originally she was working with patients and the Keto diet, eventually used it herself to eliminate hot flashes.