The body will no longer retain fat: The stored fat will be used to fuel the body, and carbs will not be used.Fat will be the new energy source: Ketosis forces the body to burn fat rather than glucose. Lean Start Keto will aid it in shortening the time it would have taken to attain ketosis.The user must take two tablets first thing in the morning before eating anything. The company recommends taking two capsules of this fat burner at once for best results.