Low Estrogen and Iron Deficiency: What’s the Connection?

Medically reviewed by Ellen Byars, MSN, WHNP, MSCP · Written by Suzanne Mooney · October 9, 2026

Not sure if it’s perimenopause? Check your symptoms and find out.

Key Takeaways

Perimenopause and menopause bring hormonal changes that can affect estrogen levels, which may in turn influence how the body stores and uses iron.
As estrogen levels fall during perimenopause, the body may have a harder time absorbing iron, and heavy or irregular periods can add to iron loss during this time. This can lead to iron deficiency, which shares many symptoms with menopause itself, including fatigue, brain fog, mood changes, hair thinning, and sleep problems, making it tricky to know what is causing how you feel.
If you are experiencing persistent fatigue, heavy bleeding, or symptoms that are new or getting worse, reaching out to your healthcare provider is a helpful next step, as they can run blood tests to check your iron levels and work with you to find a plan that fits your needs.

Perimenopause and menopause bring changes in hormone levels, including estrogen. Aside from causing various symptoms, changes in estrogen may also affect your body’s iron stores, which, in turn, may affect how you feel.

In this article, we’ll explore how estrogen and iron are connected, how changes during the menopause transition may affect your iron levels, and how iron deficiency can cause symptoms that may overlap with those of menopause or perimenopause.

How Estrogen and Iron Are Connected

Estrogen is a hormone that plays an important role in the body. It affects your reproductive health, as well as your skin, brain, bones, and muscles.

When estrogen is too low, women may experience symptoms such as hot flashes, dry skin, difficulty concentrating, low energy levels, mood changes, and trouble sleeping.

Low estrogen may also influence how the body regulates iron.

Research suggests that estrogen may affect hepcidin, a hormone made by the liver. Hepcidin helps regulate iron, including how it’s stored and used, and makes sure your body has enough but not too much.

Estrogen, particularly a form called estradiol, can suppress hepcidin production. This could mean that falling estrogen levels during perimenopause may affect hepcidin production and iron storage.

However, researchers are still working to understand this potential connection.

Why Perimenopause Raises the Risk of Iron Deficiency

As discussed above, estrogen may influence how your body regulates iron. If falling estrogen levels during perimenopause and menopause raise hepcidin levels, this could reduce iron absorption and increase the risk of iron deficiency.

Another cause of iron loss during perimenopause is heavy or more frequent periods. Because blood contains iron, losing blood also means losing iron.

In fact, heavy or irregular menstrual bleeding during perimenopause is one of the most common causes of iron loss for women in midlife.

Overlapping Symptoms: Is It Low Estrogen, Low Iron, or Both?

During perimenopause and menopause, women experience a range of symptoms that may be due to falling estrogen levels, iron deficiency, or a mix of both.

Some overlapping symptoms between low estrogen and low iron include:

Fatigue or low energy
Mood swings or changes
Brain fog (difficulty concentrating)
Hair loss or hair thinning
Dizziness
Sleep problems
Headaches

The overlap between the symptoms of low estrogen and iron deficiency can make it hard to nail down the root cause based on symptoms alone.

It’s important to tell your healthcare provider about any new or changing symptoms rather than assuming the symptoms are caused by menopause. Depending on your symptoms and medical history, your provider may recommend some blood tests.

Testing for Iron Deficiency

If your healthcare provider decides to do a blood test, two levels they may check are:

Ferritin — A blood protein that contains iron
Hemoglobin — A protein in red blood cells that carries oxygen

Low ferritin levels can signal iron deficiency. Low hemoglobin levels can indicate anemia, including iron deficiency anemia. Your provider may also order other tests, including a complete blood count (CBC).

If any of your test levels are low or abnormal, you may need additional testing.

Managing Iron Deficiency During Perimenopause and Menopause

Once you and your healthcare provider determine what may be causing your symptoms, you can work together to create a plan. They may recommend one or more of the following strategies.

Get More Iron From Your Diet

Eating a variety of iron-rich foods can help you meet your body’s iron needs. Iron-rich foods include red meat, poultry, seafood, beans, tofu, spinach, kale, and other leafy green vegetables.

A registered dietitian or your healthcare provider can review your menopause diet plan and suggest ways to up your iron intake.

Consider Iron Supplements

If you have low iron, your healthcare provider may recommend taking an iron supplement.

Iron supplements can help restore iron levels, but they can also cause side effects, including constipation, nausea, or stomach upset, so take them only as directed.

A few things to know:

Some people are advised to take oral iron every other day rather than every day to help prevent or reduce side effects.
Taking vitamin C with an iron supplement may help iron absorption.
Calcium may block iron absorption.

The amount of iron you need and how you take it will depend on your individual situation. Ask your healthcare provider for guidance. Do not take more than your provider prescribes because having too much stored iron, sometimes called iron overload, can lead to organ or joint damage.

Address Heavy Bleeding

If heavy periods are contributing to your iron loss, treating the bleeding may help prevent or reverse iron deficiency.

Heavy menstrual bleeding can have many possible causes, including fibroids, hormonal changes, and other medical conditions. Depending on the underlying cause of your blood loss, treatment options may include medication, such as combined hormonal contraceptives (pills, vaginal ring, or patches), progestin-only pills, a progestin-containing IUD, or a procedure.

Talk To Your Doctor

The body goes through a lot during perimenopause, and it can sometimes be hard to know what’s causing your symptoms.

While fluctuating hormone levels may play a large role, other conditions, including iron deficiency, can cause similar symptoms and lead to other health issues.

Schedule an appointment with your healthcare provider if you have:

Persistent or unexplained fatigue
Heavy bleeding that lasts more than seven days
Symptoms that are new, changing, or getting worse

Your healthcare team can help figure out whether your symptoms may be related to menopause, iron deficiency, anemia, or a combination of factors. Once you know what’s causing your symptoms, you and your provider can work together to form a treatment plan that works for you.

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