Low energy is one of the most common symptoms in chronic illness, yet it rarely has a single cause. Fatigue often reflects a combination of inflammation, hormonal imbalance, mitochondrial dysfunction, poor sleep, nutrient deficiencies, or chronic stress.

Functional medicine evaluates these systems together to understand what is preventing the body from producing and sustaining energy. Treatment may involve restoring nutrient levels, supporting cellular energy production, improving sleep quality, reducing inflammation, or strengthening the stress response.

As these systems regain balance, energy levels often improve gradually but consistently, supporting long‑term vitality.