Serum Iron 39 µg/dL: Is That Low?

Bottom line: Serum Iron 39 µg/dL — see your doctor to discuss this result.

Ernestas K.
Written by
Clinical research writer specializing in human health, biology, and preventive medicine.
Reviewed against NIH, WHO, ASH, Mayo Clinic, CDC guidelines · Last reviewed March 26, 2026
YOUR RESULT
39 µg/dL
Low

Is Serum Iron 39 µg/dL Low, Normal, or High?

Serum Iron 39 µg/dL might be considered a low value, often indicating that the amount of iron circulating in your bloodstream is less than what is typically observed. This measurement can understandably spark feelings of worry or concern about your overall well-being. It suggests your body might not have enough readily available iron to support its many vital functions. Understanding what this specific number means for you is the first step toward gaining clarity and peace of mind.

Serum Iron RangeValues
Very Low (Severe Deficiency)Below 30 µg/dL
Low30 - 58 µg/dL
Normal59 - 158 µg/dL
High159 - 250 µg/dL
Very High (Possible Iron Overload)251 - 500 µg/dL
How iron is absorbed and used in your body Small intestine Absorbs iron Bloodstream Carries iron to cells Bone marrow Makes hemoglobin Serum Iron reflects how much iron your body has stored or available
Your Serum Iron 39 means different things depending on your other markers
Serum Iron + Hemoglobin
Hemoglobin levels combined with this marker can reveal underlying conditions that neither value shows on its own
Check now →
Serum Iron + Creatinine
Kidney function reflected by creatinine affects how this marker is processed and what your levels actually mean
Check now →
Serum Iron + Fasting Blood Glucose
Blood sugar status interacts with this marker in ways that change the clinical significance of your result
Check now →

Hidden Risk of Serum Iron 39 µg/dL

When your Serum Iron measures at 39 µg/dL, it can carry hidden risks that extend beyond just physical symptoms, often impacting your daily quality of life and emotional resilience. While not an emergency level, consistently low iron can subtly chip away at your energy and focus, leaving you feeling less like yourself. This consistent feeling of fatigue or brain fog can be frustrating and contribute to feelings of anxiety about your health. The National Institutes of Health (NIH) emphasizes that even mild iron deficiency can affect cognitive function and mood, making everyday tasks feel more challenging.

What Does a Serum Iron Level of 39 µg/dL Mean?

To truly understand what Serum Iron 39 µg/dL signifies, imagine iron as the essential 'fuel delivery trucks' that transport oxygen throughout your body. Your red blood cells are like these trucks, and they need a specific amount of iron to carry oxygen efficiently from your lungs to every cell, tissue, and organ. Serum iron, specifically, is a measure of the iron that is currently circulating freely in your bloodstream, ready to be picked up by these trucks or stored for future use. When your serum iron value is 39 µg/dL, it suggests that there aren't enough of these 'fuel delivery trucks' circulating with their cargo, or perhaps the supply of fuel itself is running low. This can mean that the oxygen isn't being delivered as efficiently as it should be, potentially leading to the feelings of sluggishness, tiredness, or weakness that many people experiencing low iron levels describe. It's a key indicator, providing a snapshot of the iron available for immediate use in your body, and a low level like this often prompts a deeper look into your body's overall iron stores.

Reading about one marker can be misleading.

Your blood test has multiple results that affect each other. Serum Iron 39 alone doesn't tell you the full picture. Your other markers do.

Check all my markers
Based on clinical guidelines · Data never stored

Lifestyle Changes for Serum Iron 39 µg/dL

Addressing a Serum Iron level of 39 µg/dL often involves exploring lifestyle adjustments beyond just what you eat. Prioritizing adequate rest is crucial; when your body isn't getting enough iron, it's working harder to do its basic functions, making sleep even more vital for recovery. Gentle, regular physical activity, like walking or light stretching, can be beneficial for overall well-being and circulation, but it's important to listen to your body and avoid overexertion if you're feeling fatigued. Managing stress through practices like meditation, deep breathing, or spending time in nature can also support your body’s ability to cope and heal. The Centers for Disease Control and Prevention (CDC) often highlights the importance of a balanced lifestyle for general health, and this extends to how your body manages essential nutrients like iron. Ensuring you have a consistent sleep schedule and finding healthy ways to unwind can create a supportive environment for your body as it works to restore its iron balance.

Also check these markers

Diet Changes for Serum Iron 39 µg/dL

When your Serum Iron registers 39 µg/dL, dietary adjustments become a significant part of supporting your body's iron needs. Focusing on iron-rich foods, both from animal and plant sources, and understanding how to maximize their absorption can make a meaningful difference. Integrating foods high in Vitamin C with iron-rich meals can also significantly boost your body's ability to take in iron, as recommended by organizations like the World Health Organization (WHO), which stresses the importance of nutritional strategies in addressing iron deficiency.

Iron-rich foods and absorption helpers Red meat Heme iron Spinach Non-heme iron Lentils Iron + fiber Citrus Boosts absorption Fortified cereal Added iron Pair iron-rich foods with vitamin C for better absorption

Serum Iron 39 µg/dL in Men, Women, Elderly, and Kids

A Serum Iron value of 39 µg/dL is generally considered low across different groups, but the reasons behind this level can vary significantly depending on age, sex, and life stage. For women, especially those of childbearing age, monthly menstruation can lead to regular iron loss, making them more susceptible to low iron levels. Pregnancy also significantly increases iron demands, as the body needs to support both the mother and the developing baby, and without adequate intake, iron levels can drop. For children and adolescents, periods of rapid growth necessitate higher iron intake, and a level of 39 µg/dL could indicate that their growing bodies aren't getting enough to keep up. In men and postmenopausal women, low iron levels are less commonly due to dietary intake alone and might prompt a deeper investigation into potential sources of iron loss, such as in the gastrointestinal tract. The Mayo Clinic often underscores that while symptoms of low iron can be similar across demographics, the underlying causes must be explored specifically for each individual to ensure the most appropriate approach.

Medicine Effects on Serum Iron 39 µg/dL

Understanding how various medications might influence your Serum Iron level of 39 µg/dL is an important aspect of your health picture. Some commonly used drugs can either interfere with the absorption of iron from your diet or, in some cases, even lead to subtle iron loss over time. This interaction isn't always obvious, but it's a factor healthcare providers consider when evaluating low iron, as noted by groups like the American Society of Hematology.

When to Retest Serum Iron 39 µg/dL

After discussing a Serum Iron level of 39 µg/dL with a healthcare provider and starting any recommended adjustments, the question of when to repeat the test often arises. Repeating the test is a common and important step to track how your body is responding to changes in diet, lifestyle, or any other interventions. It helps confirm whether your iron levels are improving and if the chosen approach is effective. The timing for a repeat test is not one-size-fits-all and is typically determined by your healthcare provider, who will consider the specific reasons for your low iron, your overall health, and how quickly they expect to see changes. They might suggest retesting in a few weeks or a few months, depending on the individual circumstances. This follow-up ensures that your journey to balanced iron levels is being monitored appropriately and that any adjustments can be made along the way to support your well-being.

Serum Iron 39 µg/dL — Frequently Asked Questions

What might cause my Serum Iron to be 39 µg/dL?

A Serum Iron level of 39 µg/dL often suggests that your body's readily available iron supply is low. Common reasons for this can include insufficient dietary intake of iron, chronic blood loss (even small amounts not always visible, like from the digestive tract), increased iron demand (such as during rapid growth, pregnancy, or heavy menstruation), or issues with your body's ability to absorb iron from food due to certain medical conditions or medications. Your healthcare provider can help explore the specific cause for your situation.

How does a Serum Iron level of 39 µg/dL affect how I feel day-to-day?

A Serum Iron level of 39 µg/dL is quite low and can significantly impact how you feel daily. You might experience persistent fatigue or a lack of energy, even after a full night's sleep, making everyday tasks feel unusually demanding. Other common feelings include difficulty concentrating, forgetfulness, general weakness, shortness of breath during light activity, or even an increased sense of irritability. These symptoms arise because your body needs enough iron to transport oxygen efficiently, and when levels are low, this process becomes less effective.

Is 39 µg/dL a level that needs immediate attention?

While a Serum Iron level of 39 µg/dL is considered low and warrants attention, it's generally not an emergency requiring immediate medical intervention. However, it is a clear indicator that you should schedule an appointment with your healthcare provider to discuss this result. They can assess your overall health, look for underlying causes, and recommend a personalized plan to help bring your iron levels back into a healthy range. Addressing low iron is important for your long-term health and quality of life.

When to See a Doctor About Serum Iron 39 µg/dL

Discovering your Serum Iron is 39 µg/dL can naturally lead to feelings of uncertainty or concern, and it's precisely at this point that consulting a healthcare provider becomes crucial. This specific numerical value indicates a low iron level, suggesting your body might be struggling to maintain its vital functions effectively. It's not just about the number itself, but what it represents for your overall health and how you feel day-to-day. A doctor can help you understand the full context of this result, considering your unique health history, any symptoms you might be experiencing, and other relevant lab tests. They can identify the underlying reasons for your low iron, which could range from dietary factors to subtle blood loss or absorption issues, as recognized by organizations like the World Health Organization. This personalized evaluation is essential to create an effective plan tailored specifically for you, focusing on safely and appropriately restoring your iron balance and improving your well-being. Don't let the worry linger; empower yourself by seeking professional guidance to unravel the mystery of your 39 µg/dL Serum Iron result.

Your Serum Iron Summary
SAVE THIS
Your result 39 µg/dL
Classification Low
Optimal target 59 - 158 µg/dL
Retest in As directed by your doctor
Recommended Actions
Talk to your doctor as soon as possible to discuss treatment options
Get additional testing as directed by your doctor
Adjust diet toward whole foods, vegetables, and lean protein
Begin moderate exercise (walking 30 min/day) once cleared by your doctor
Downloads a PNG you can save or share with your doctor

What else did your blood test show?

Add your other markers to see how they interact with your Serum Iron 39

Serum Iron 39 + your other markers → combination insights
Disclaimer: This content is for informational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before making decisions about your health. BloodMarker does not establish a doctor-patient relationship. Terms & Conditions