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What to Know About the Latest Iron Deficiency Guidelines

The new thresholds set 20 ng/mL for children and 30 ng/mL for most adults, aiming to catch deficiency before anemia develops.

  • In 2026, the American Society of Hematology released new guidelines establishing higher ferritin cutoffs to detect iron deficiency earlier, aiming to ensure more patients secure timely treatment.
  • Routine screening among high-risk groups like Children and pregnant Women may miss more than 70% of iron deficiency instances because previous thresholds, such as The World Health Organization recommendation of 15 ng/mL, were too low.
  • Ferritin cutoffs are now 20 ng/mL for Children, 30 ng/mL for most adults, and 50 ng/mL for those with heavy menstrual bleeding or other risk factors to address subtle symptoms like fatigue and brain fog.
  • Ariela Marshall advises checking ferritin for Patients who remain tired despite healthy habits, while Marshall and Powers warn against self-diagnosing via Social media trends like "ferritin face," calling it "a common misperception" needing correction.
  • For Patients with inflammatory issues, the new limit is 100 ng/mL requiring additional testing like transferrin saturation, while taking oral iron supplements can alleviate symptoms in weeks or months for those diagnosed with a Deficiency.
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What to know about the latest iron deficiency guidelines

More people are low in iron than in any other micronutrient, according to the American Society of Hematology. But until now, there has not been a single agreed-upon threshold to determine who has iron deficiency.

·Oklahoma City, United States
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The American Society of Hematology has lifted the ferritin threshold to detect ferropenia from 15 to 30 ng/ml. We talked to Mariola Abio, a hematologist, about the situation in Spain.

·Madrid, Spain
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20minutos broke the news in Madrid, Spain on Tuesday, November 10, 2026.
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