Vitamin D, B12 and iron: the deficiencies that mimic depression
Low mood isn't always psychological. These three common deficiencies are routinely mistaken for depression, and they're easy to check.
Persistent fatigue, low mood, and trouble concentrating are classic depression symptoms, but they're also classic signs of common, checkable deficiencies.
The usual suspects
Vitamin D supports mood and is widely low in people who get little sun. B12 is essential for nerve and brain function; deficiency causes fatigue and low mood, and is common in older adults and plant-based eaters. Iron carries oxygen, and when it's low, energy and concentration fall, and anxiety can rise.
Why they get missed
The symptoms overlap so closely with depression that the physical cause is often overlooked. A simple blood panel can tell them apart.
What to do
If your low mood comes with notable fatigue, ask your GP about checking these. Correcting a real deficiency can lift symptoms that no amount of "trying harder" would.
This is general information, not medical advice. Testing and treatment should go through a clinician.
This article is for general information and is not a substitute for professional care. If you are in crisis or thinking about harming yourself, please contact your local emergency services or a crisis line. See crisis lines.