The Cortisol Belly Fat Connection Must Be Broken For Flat Abs The cortisol belly fat connection keeps many people fat and frustrated. This hormone has many negative effects on your health including fatigue, headaches, and increased belly fat. Yet the production of this hormone is in large part under your control. in Public bookmarkswith abdominal_musclescortisol_belly_fatstubborn_stomach_fat Note: The cortisol belly fat connection keeps many people fat and frustrated. This hormone has many negative effects on your health including fatigue, headaches, and increased belly fat. Yet the production of this hormone is in large part under your control.