@4dml
This^
I have been told so many times that “potatoes are sugar!” or “strawberries aren’t keto.” etc. and yet I lost 40 pounds, cured my hypoglycemia (chronic for ten years prior to getting on a ketogenic diet) and was in ketosis for an entire year while eating these things daily. The only things that are problematic are things that would necessarily knock one out of ketosis. For example an entire carton of ice cream in one sitting. Other than that, if it doesn’t knock you out of ketosis then it’s keto. I eat 1/4-1/2 cup of potato and balance out the carbohydrate intake with the rest of my food for the day and it has never knocked me out of ketosis because no, potatoes are not “sugar”. All we can say is that eating a huge amount of potato would knock one out of ketosis, the food itself however is neither keto nor not keto, it’s all about quantity.
Heck, even eating a small portion of sugar would not actually be a problem so long as one made sure that they did not go over their carb tolerance and knock themselves out of ketosis.