For the sake of a balanced conversation here is a take from a pro Keto diet family practice physician. I try to eat low carb, focusing on nutritionally dense foods including pasture raised animal products that have a healthy free fatty acid profile and no hormones and antibiotics. I also do intermittent fasting. I try to eliminate refined flour and corn products as much as I can. Watch out for plant based foods that are high in anti nutrients (lectins, phytic acid, oxalates, etc), and for plant foods that you may actually be allergic to, e.g. night shades, et.al.