The kidneys help utilize protein, and McManus says the keto diet may over-burden them. (The current prescribed admission for protein midpoints 46 grams for every day for ladies, and 56 grams for men). Stoppage. The keto diet is low in stringy sustenances like grains and vegetables. Fluffy reasoning and emotional episodes. "The mind needs sugar from solid starches to work. Low-carb diets may cause disarray and crabbiness," McManus says.