If digestion feels unpredictable—bloating one day, discomfort the next, reactions to foods that should be fine—it’s easy to assume the problem is the food. However, digestion doesn’t begin in the stomach. It begins in the nervous system. Digestion is a parasympathetic process. When the body feels safe, relaxed, and supported, digestive secretions flow, motility is coordinated, and nutrients are absorbed efficiently. When the nervous system is under stress—whether from inflammation, blood sugar instability, poor sleep, or ongoing emotional or relational strain—digestion downshifts in favor of survival. You can’t digest well while running from a lion.

Cortisol often gets labeled as a “stress hormone,” but in a healthy body, cortisol is not the enemy. It’s a guiding hormone. One that helps regulate energy, blood sugar, inflammation, blood pressure, and the sleep–wake cycle. When cortisol follows its natural daily rhythm, mornings feel alert, energy stays steady, and sleep becomes deep and restorative. When the rhythm is disrupted, the body can feel wired at the wrong times and tired when energy is needed. The good news is that cortisol rhythm responds quickly to daily habits—how you eat, sleep, move, manage stress, and expose yourself to light. Small, consistent changes can help bring this rhythm back into balance.