Why Evolution Lean Keto Pills? Well, the keto diet is hard, right? And most people struggle with staying true to keto in the beginning. Why? Because, when your body gets less than 50 grams of carbs a day (what you need to do on the keto diet), it will revolt. Your body and brain will react negatively – AT FIRST. Evolution Lean Keto Weight Loss works to help you start your keto diet off right.