Cramping issues in individuals on a ketogenic diet are likely due to electrolyte imbalances caused by the lack of carbohydrate intake.

“if you're keto uh and you're having issues with cramping that is an electrolyte issue because you are not including carbohydrates in your diet it's easily fixable”

“when you're in ketosis your body basically starts wasting sodium your body responds by trying to save sodium and usually ends up shunting magnesium and potassium out of the kidney so you do tend to cramp more and if you're not supplementing that sodium and magnesium you can also tend to get a little light-headed”