Iron Deficiency Without Anemia

It’s an all-too-common misconception that anemia and iron deficiency are co-occurring — even synonymous — conditions. This is because many patients and practitioners alike assume that insufficient iron levels are only a concern if hemoglobin levels are also low, which would indicate the presence of iron deficiency anemia (IDA). 

In reality, however, anemia and iron deficiency are two separate issues! Iron deficiency can lead to anemia if untreated, but it’s also possible to experience the negative effects of low iron regardless of whether you have decreased levels of healthy red blood cells (anemia). In fact, iron deficiency without anemia (IDWA) can be just as problematic as iron deficiency anemia, and it’s thought to be at least two to three times as common.

In this blog, we’ll take a closer look at non-anemic iron deficiency: a common yet misunderstood mineral deficiency that affects billions of people worldwide. Knowing the signs and symptoms of iron deficiency without anemia can help you advocate for yourself at the doctor’s office and get the treatment you need to improve your iron levels and restore your health. 

The negative effects of iron deficiency without anemia 

Despite its high prevalence, iron deficiency without anemia is frequently undiagnosed — putting billions of patients at risk of experiencing the negative health effects of low iron. Even in the absence of anemia, iron deficiency can cause symptoms that significantly impair cognition, mood, and overall quality of life!

Common iron deficiency symptoms

Although iron deficiency can affect everyone a bit differently, common symptoms of low iron include fatigue, brain fog, concentration issues, headaches, poor work performance, weakness, dry skin, hair loss, heart palpitations, restless legs, spoon-shaped nails, and depression. Heavy menstrual bleeding can be another symptom of low iron among reproductive-age women.

Low iron levels have also been associated with attention-deficit/hyperactivity disorder (ADHD); autoimmune thyroid disease (AKA Hashimoto’s); and a wide array of other nonspecific symptoms that mimic conditions such as hypothyroidism, chronic fatigue syndrome, depression, and fibromyalgia. 

If you’re experiencing any of these symptoms, comprehensive iron testing is an important first step. Schedule an appointment online or call +971-800-6686 to learn how naturopathic functional medicine can help!

The three stages of iron deficiency

Unfortunately, suboptimal screening methods, misinterpretation of lab results, and lack of awareness about the effects of low iron are just a few of the reasons why non-anemic iron deficiency tends to go unnoticed, undiagnosed, and untreated. Sometimes for years or even decades! This is problematic for several reasons. 

Firstly, untreated iron deficiency is associated with significant impairments in quality of life. It affects mitochondrial functioning, immune health, brain function, and the production of certain hormones (like thyroid hormones). It also impacts the synthesis of hemoglobin and myoglobin: proteins that transport oxygen throughout the body. 

Secondly, if iron levels aren’t restored and the nutrient deficiency progresses, it can eventually lead to anemia: the most severe form of iron insufficiency. This is because there are several stages of iron insufficiency, and mild iron deficiency can progress to anemia if undiagnosed and untreated. 

The three stages of iron deficiency include:

1. Iron insufficiency. This first stage of iron deficiency is characterized by decreased ferritin (iron stores), normal serum iron, and normal hemoglobin levels. Ferritin levels of less than 30 μg/L indicate an iron deficiency, while ferritin levels of 100 μg/L or less can indicate an iron insufficiency. Those with chronic inflammatory conditions may require even higher ferritin levels to address symptoms of low iron.
2. Latent iron deficiency or low iron without anemia. The second stage of iron insufficiency is characterized by low ferritin levels, normal hemoglobin values, and occasionally, low serum iron and transferrin saturation. In some cases of iron deficiency, mean cell volume may be decreased, while total iron binding capacity and soluble transferrin receptor levels may be increased.  
3. Iron deficiency anemia. The third stage of iron deficiency is characterized by decreased ferritin, low transferrin saturation, low serum serum, low hemoglobin levels, and low hematocrit values. In some cases of iron deficiency anemia, total iron binding capacity and soluble transferrin receptor levels may be increased. 

In most cases, low iron levels are treated the same regardless of whether you’re anemic or have non-anemia iron deficiency. Treatments typically include oral supplementation, dietary changes, and in some cases, IV iron infusions. 

That said, the first step toward addressing an iron deficiency is working with a physician who can order the right tests, interpret your results, and offer personalized recommendations. Excess iron can be harmful, and we don’t recommend supplementing with iron unless you’ve measured your levels and know you’re deficient. 

How do you treat iron deficiency without anemia?

While iron deficiency and anemia are treated similarly, correcting low iron levels can vary depending on the underlying root cause. For this reason, identifying and managing the cause of the iron deficiency is just as important as treating it! 

Iron deficiency can occur as a result of:

• Inadequate iron intake from food.
• Increased physical demand.
• Chronic inflammation.
• Blood loss from menstruation, hemorrhoids, nosebleeds, and GI bleeding. 

Conditions that impair nutrient absorption can also deplete iron levels in the body, including H. pylori infections and autoimmune conditions such as inflammatory bowel disease (IBD) and celiac disease. Among reproductive-age women, however, chronic blood loss from prolonged or heavy menstrual bleeding is a leading cause of iron deficiency. 

Once we’ve identified the underlying root cause of your low ferritin levels, we can determine how to best treat your iron deficiency with diet, supplementation, and lifestyle changes. To learn more about diagnosing and treating low iron levels, be sure to read my iron deficiency and anemia blog post!