Can Low Iron Cause Insomnia?
Medically reviewed by Linda Girgis | MD, Girgis Family Medicine on August 20th, 2026.
Yes, low iron can cause insomnia and other sleep disturbances. Iron deficiency affects the production of neurotransmitters like dopamine and serotonin, which regulate sleep cycles. Studies show that up to 25% of people with restless leg syndrome, a major cause of insomnia, have low iron levels. Iron deficiency can also cause fatigue during the day, leading to irregular sleep patterns at night. Additionally, low iron reduces oxygen transport to tissues, creating physical discomfort that interferes with falling asleep. If you suspect iron deficiency is affecting your sleep, blood tests measuring ferritin levels can confirm the diagnosis and guide appropriate treatment.
Still have questions about this?
Ask your AI Doctor
Keep exploring
Related Questions
From the blog
More from Doctronic
Can Low Iron Cause Heart Palpitations? Signs, Causes & When to Worry
Heart palpitations can feel alarming, but when they're linked to low iron levels, understanding the connection can help you address both the symptom…
Iron Deficiency Anemia: Causes, Symptoms, and Treatment
Iron deficiency anemia occurs when your body lacks sufficient healthy red blood cells due to inadequate iron levels, affecting your energy, immune…
Can Low Iron Cause Headaches? Signs, Symptoms & Solutions
Yes, anemia can cause headaches. When iron levels drop, the brain receives less oxygen, triggering persistent head pain that many people never…