ASH sets new standards for diagnosing iron deficiency
Iron deficiency is one of the most common health conditions in the world, but many people live with symptoms for months or years before receiving a diagnosis. To address this critical unmet need, the American Society of Hematology (ASH) issued new clinical guidance to improve how iron deficiency is recognized and diagnosed across key populations, including adults, young children, menstruating and…
Iron deficiency, one of the most common health conditions worldwide, often goes unnoticed for months or years before diagnosis. To tackle this issue, the American Society of Hematology (ASH) has released new clinical guidelines aimed at improving the recognition and diagnosis of iron deficiency across various populations. These guidelines address long-standing challenges, such as inconsistencies in testing practices and unclear clinical scenarios.
Diagnosed through blood tests measuring ferritin levels, iron deficiency affects about one in three people, yet many remain undiagnosed and untreated. Iron deficiency can advance to iron deficiency anemia, which impairs oxygen transport and, if left untreated, can cause life-threatening complications. ASH President Robert S. Negrin emphasized that many patients experience symptoms like fatigue and weakness for extended periods before receiving a diagnosis.
The new ASH guidelines recommend higher ferritin thresholds to aid clinicians in identifying iron deficiency earlier and more accurately. Ferritin, a protein storing iron, is crucial for producing hemoglobin, a molecule transporting oxygen throughout the body. Iron deficiency results from low iron stores, leading to symptoms including fatigue, shortness of breath, rapid heartbeat, headaches, and pale skin. Untreated, it can progress to iron deficiency anemia, the most common hematologic condition globally.
Iron deficiency is estimated to impact 10 million adults in the U.S. and 2 billion people worldwide. High-risk individuals—such as pregnant women, menstruating individuals, children, those with gastrointestinal conditions, or people with blood loss or chronic health conditions—may have up to 70% of cases missed due to insufficient screening and variability in diagnostic reference ranges.
The updated ferritin thresholds for diagnosing iron deficiency are now higher across all populations. For children aged 9 months to 4 years, the cutoff is ≤20 ng/mL; for adults and menstruating or pregnant individuals, it is ≤30 ng/mL; and for selected high-risk groups, ≤50 ng/mL. In adults with inflammation, ferritin levels of ≥100 ng/mL or transferrin saturation of ≥20% support a diagnosis.
These recommendations empower patients to seek appropriate testing and encourage health systems to adopt these diagnostic thresholds.
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