Conditions

Vitamin D deficiency and thyroid-like symptoms

47.9% worldwide below 50 nmol/L (20 ng/mL) ↗︎

Key facts about vitamin D deficiency

  • Very common, especially in northern latitudes
  • Below 20 ng/mL (50 nmol/L) is usually called deficient; there is no agreed optimal level ↗︎
  • Fatigue may improve when a true deficiency is corrected (one small trial) ↗︎
  • Associated with autoimmune thyroid disease ↗︎

Common symptoms

Many of these also occur in hypothyroidism, which is why the two are easily confused.

Fatigue Muscle weakness Muscle aches Joint pain Depression Brain fog Hair loss

Tests to ask your doctor about

  • 25-OH Vitamin D
  • Calcium
  • PTH
Check your symptoms Other conditions
Important

This page is for educational purposes only. It cannot diagnose medical conditions. Always consult a healthcare provider for proper evaluation and testing.

Medically reviewed · Last reviewed