Can Iron Deficiency Cause Anxiety?

Anxiety, fatigue, and feeling on edge often show up together, and low iron may be part of the reason why. A growing body of research suggests that iron deficiency can play a real role in anxiety and other mood changes. Read on to find out what the current research says.

What Is Iron Deficiency, and Why Is It So Common?

Iron deficiency is one of the most common nutrient shortages in the world. It occurs when your body does not have enough iron to make healthy red blood cells. Low iron and iron deficiency anemia often go unnoticed for months or years before a blood test uncovers the problem.

Common causes include low dietary iron, heavy periods, pregnancy, and conditions that affect how well your gut absorbs nutrients.

Can Iron Deficiency Cause Anxiety and Depression?

Yes, research suggests iron deficiency can contribute to anxiety and depression, though it is rarely the only cause. Iron deficiency anemia often comes with fatigue, low mood, anxiety, restlessness, and palpitations (a fluttering or pounding heartbeat). People with low iron appear to be more likely to develop these kinds of symptoms.

In some cases, they may be misdiagnosed with depression when an underlying iron problem may be the true driver.

How Low Iron Affects Mood and Brain Chemistry

Iron does more than help red blood cells carry oxygen. It also helps your body build serotonin, dopamine, and norepinephrine, the brain chemicals that help regulate mood and motivation. When iron stores run low, this process can slow down.

Some research links low iron to higher rates of depression and anxiety and treating the deficiency has been shown to improve mood in many people with mild to moderate symptoms.

Anxiety Symptoms That Can Overlap With Low Iron

Anxiety and anemia share several symptoms, including fatigue, weakness, and shortness of breath. This overlap may make it hard to tell the two apart. Iron deficiency can also cause heart palpitations and restlessness, which can feel a lot like anxiety.

Because the symptoms overlap so closely, one condition can make the other feel worse.

Other Ways Low Iron Can Affect Sleep and Wellbeing

Low iron has also been linked to restless legs syndrome, a condition that causes an uncomfortable urge to move your legs, especially at night. This can disrupt sleep and lead to irritability and mood swings the next day. Poor sleep and ongoing fatigue can, in turn, make anxiety and low mood feel even more intense, creating a cycle that is hard to break without addressing the iron deficiency itself.

Could Anxiety Be a Sign of Undiagnosed Iron Deficiency?

Anxiety does not directly cause iron deficiency, but the connection may run the other way. If you have been managing anxiety for a while without much relief, an unchecked iron deficiency could be part of the picture. This is worth considering especially if you also have fatigue, pale skin, dizziness, or unusual cravings for non-food items like ice.

Testing and Restoring Healthy Iron Levels

The only way to know if low iron is contributing to your symptoms is to get tested. A simple blood test can check your iron and ferritin (a protein that shows how much iron your body has stored) levels. If a healthcare provider confirms a deficiency, treatment usually involves a combination of the following:

• Iron-Rich Foods: Add iron-rich foods to your diet, such as red meat, leafy greens, and fortified cereals, to help rebuild your iron stores
• Lifestyle Changes: Better sleep and reduced alcohol intake also support healthy iron levels
• Iron Supplements: Heme iron supplements, such as OptiFer Alpha, are absorbed differently than traditional iron salts and are designed to be gentler on the stomach, which may help you stay consistent with treatment

Always talk with a healthcare professional before starting any supplement, especially if you are pregnant, breastfeeding, or managing another health condition.

Conclusion

Can iron deficiency cause anxiety? For some people, the evidence suggests it can play a meaningful role, alongside other physical and mental health factors. If you are dealing with ongoing anxiety, fatigue, or restlessness, it is worth asking your healthcare provider about an iron and ferritin test.

Addressing an iron deficiency will not replace other anxiety treatments, but for some people, it may be an important missing piece.

References

PMC: Psychiatric Manifestations of Iron Deficiency Anemia-A Literature Review

Healthline: Anemia and Anxiety: Understanding the Connection

Sport Medicine Clinic: Iron Deficiency Anemia and Its Impact on Physical & Mental Health

Michigan Medicine: Could Low Iron Make Mental Health Symptoms Worse?

HemeOnCall: Low Iron Levels and Mental Health: Link to Depression & Anxiety