The argument about more protein for muscle for men--but that isn't really specific to keto. Also if women needed less protein per calorie, that would mean they could go with a version of keto that's more um, ketogenic, anyways. Needing less protein, if they did, wouldn't mean that they shouldn't get most of their calories from fat otherwise, rather than carbohydrate. I'm currently on a month long increased protein intake, but I think I usually eat less protein than many women on this board. A professional bodybuilder (or amateur for that matter) would probably tell me to eat a sandwich, but I'm not exactly real-world sarcopenic.