Iron Deficiency in Perimenopause & Menopause

If you’re in your late 30s, 40s, or 50s and feeling more tired than usual, you’re not alone. Many women notice changes in energy, focus, mood, and even hair health during perimenopause and menopause. While hormones can play a role, another common (and often overlooked) contributor is iron deficiency— including low ferritin, which reflects your body’s iron stores.

Perimenopause vs Menopause: A Quick Overview

Perimenopause is the transition phase leading up to menopause, where hormone levels fluctuate and menstrual cycles can become irregular. Menopause is reached when you’ve gone 12 consecutive months without a period. During both phases, it’s common to experience symptoms like fatigue and brain fog. That’s why iron deficiency can be missed—many women assume these symptoms are “just hormones.”

Why Iron Deficiency Can Happen During Perimenopause

In perimenopause, cycles can become unpredictable. Some women have heavier or more frequent bleeding, which can increase iron loss over time. Even if you’re eating well and taking supplements, heavy bleeding may outpace the iron your body can replace.

Irregular cycles may include heavier bleeding
Frequent bleeding can gradually lower iron stores
Low ferritin may develop before anemia shows up

Can You Still Have Low Iron After Menopause?

Yes. While menstrual blood loss usually stops after menopause, low iron can still occur. Causes can include reduced dietary intake, absorption issues, or underlying health conditions that affect how your body processes iron. If fatigue, shortness of breath, dizziness, or hair shedding continue after menopause, it may be worth asking your provider about checking iron levels and ferritin.

Common Symptoms of Low Iron in Perimenopause and Menopause

Iron deficiency can look different from person to person. Some women have obvious symptoms, while others feel “off” for months before discovering low ferritin or anemia.

Fatigue or low energy that doesn’t improve with rest
Brain fog or difficulty concentrating
Shortness of breath with activity
Dizziness or lightheadedness
Headaches
Heart palpitations (racing or pounding heartbeat)
Cold hands and feet
Hair thinning or increased shedding
Weakness or reduced exercise tolerance

Because these symptoms can overlap with perimenopause and menopause, testing can be a helpful way to clarify what’s going on.

Ferritin vs Hemoglobin: Why Both Matter

Many people associate iron issues only with anemia. But iron deficiency can exist before anemia develops.

Ferritin reflects your iron stores (how much iron you have “in reserve”).
Hemoglobin reflects how well your blood can carry oxygen.

It’s possible to have low ferritin with a hemoglobin level that still appears within a normal range. That’s one reason some women feel symptomatic even when they’re told their bloodwork is “fine.”

What to Ask Your Provider to Check

If you suspect iron deficiency, ask your healthcare provider whether iron studies are appropriate. Depending on your situation, they may consider:

Hemoglobin and complete blood count (CBC)
Ferritin
Serum iron and transferrin saturation (iron saturation)

Your symptoms, medical history, and lab results together help guide the next step.

Treatment Options: Oral Iron vs IV Iron

Treatment depends on the severity of the deficiency, symptoms, and whether oral supplements are working. Some women do well with oral iron, while others may have trouble with absorption or side effects. If iron stores remain low despite supplementation—or if symptoms are significantly affecting quality of life—your provider may discuss IV iron infusion as an option to replenish iron more efficiently under medical supervision. Learn more about the difference between Oral Iron vs IV Iron

When to Seek Care

Consider speaking with a healthcare provider if you have ongoing low iron symptoms like fatigue, dizziness, shortness of breath, or hair shedding—especially if symptoms are persistent or getting worse. Getting the right lab work can help clarify whether iron deficiency is contributing.

Iron Deficiency in Perimenopause and Menopause