Why Am I Always Tired?
Chronic fatigue often traces back to nutrient deficiencies, poor sleep quality, or underlying conditions. Learn what your body might be missing.
Key Findings
- Iron deficiency is the #1 cause of fatigue worldwide, affecting over 25% of the population
- Low vitamin D affects energy metabolism and is deficient in ~42% of US adults
- B12 deficiency can cause fatigue even when levels appear 'normal' on standard tests
- Magnesium is involved in over 300 energy-producing reactions in the body
Key Nutrients
- Iron — Essential for oxygen transport — low iron = low energy at the cellular level
- Methylcobalamin (Active B12) — Active form of B12 that drives energy production in every cell — 40% of people have MTHFR variants that block standard B12 conversion, making the active form essential
- Vitamin D — Regulates energy metabolism; deficiency linked to chronic tiredness
- Magnesium — Powers 300+ enzymatic reactions including ATP energy production
- CoQ10 — Fuels mitochondria — your cells' energy generators
The Bottom Line
Persistent fatigue is rarely 'just stress.' It's often your body signaling a nutrient gap — especially iron, B12, or vitamin D. A simple blood panel can reveal what's missing, and dietary changes can make a noticeable difference within weeks.
Related Topics
- Brain Fog and Nutrient Deficiencies
- Iron Deficiency Symptoms
- Vitamin D Deficiency
- Medications That Deplete Nutrients