Research
Micronutrients & recovery
Treatment of iron deficiency after gastric bypass is often refractory to oral supplementation, frequently requiring parenteral (IV/IM) iron, blood transfusions, or surgical reversal/conversion for severe or persistent cases.
If oral iron doesn't fix your anemia after bypass surgery, don't give up. You likely need IV iron, which bypasses your gut. This is common and safe. If even IV iron fails, surgical options like converting to a banding procedure or reversing the bypass might be considered to restore absorption.
GoodSupportsHIGH confidence
Once iron deficiency has developed, it may prove refractory to oral treatment, and require parenteral iron, blood transfusions, or surgical interventions.
Why this rating
Supported by multiple case series and prospective studies showing refractory anemia.
Source
Obesity, bariatric surgery, and iron deficiency: True, true, true and related
Aileen L. Love et al. · American Journal of Hematology · 2007
DOI 10.1002/ajh.21106
narrative_reviewCited 168×
Read the paper DOI resolved against Crossref · corpus check 2026-06-10
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