Understanding the Many Kinds of Anemia – and Why Inflammation Matters
Dr Stephen Wangen
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September 2, 2025
🩸 Understanding Anemia: More Than Just Low Iron
Today I saw someone struggling with anemia due to chronic inflammation. It was a powerful reminder that anemia isn’t just about low iron or vitamin deficiency.
There are many different kinds of anemia, and each tells a unique story about what’s happening inside the body.
🔹 The 3 Big Categories of Anemia
Although there are dozens of types, nearly every case of anemia fits into one of three broad categories:
Too little production of red blood cells
Causes: iron deficiency, vitamin B12 deficiency, folate deficiency, bone marrow problems, or chronic illness
Too much destruction of red blood cells (hemolysis)
Causes: autoimmune disorders, genetic conditions like sickle cell anemia or thalassemia, enzyme deficiencies (e.g., G6PD), or mechanical damage (like from artificial heart valves)
Blood loss
Causes: heavy menstrual bleeding, ulcers, chronic gastrointestinal bleeding, or major trauma
Understanding which mechanism is at play is the first step toward solving the problem.
🌿 Common Types of Anemia
Iron deficiency anemia – The most common worldwide. Iron is needed to build hemoglobin, and without it, red cells are smaller than normal (microcytic anemia).
Vitamin B12 and folate deficiency anemia – Causes large, fragile red cells (macrocytic anemia) and can lead to neurological symptoms like numbness and tingling.
Sickle cell anemia and thalassemia – Inherited conditions altering red blood cell shape or hemoglobin production.
Aplastic anemia – When the bone marrow fails to produce enough new cells.
Hemolytic anemias – Red cells are destroyed faster than they can be replaced.
Anemia of chronic disease or inflammation – Often overlooked but extremely important.
🔬 A Closer Look: Anemia of Chronic Inflammation
The patient I saw today had anemia of chronic inflammation.
Their iron, saturation, and transferrin were low, but ferritin was sky-high
Red blood cell size and volume were normal
This pattern occurs because the body, in response to ongoing inflammation, locks away iron.
Even though the body has plenty of stored iron, red blood cells can’t access it, resulting in fatigue, low energy, and poor quality of life.
This type of anemia is more common in people with:
Autoimmune conditions
Chronic infections
Kidney disease
Cancer
Unlike iron deficiency, simply giving more iron doesn’t usually solve the problem. The key is to treat the underlying disease or inflammation, which improves how the body handles iron.
📝 Final Thoughts
Anemia is not just about lab numbers. It’s about your energy, vitality, and ability to live fully.
When I see someone with anemia, it’s a reminder that our immune system, gut health, and inflammatory pathways all tie together.
If you’ve been told you’re anemic:
Ask the deeper questions
Get to the root cause
Solving anemia isn’t just about raising your blood count — it’s about restoring your life.
Remember to take good care of your body. It’s the only place that you have to live.
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