NutriStack
Iron and Pantoprazole, a caution.
Pantoprazole suppresses gastric acid, reducing the acidic environment needed for efficient iron absorption. Long-term use can impair iron status, especially in patients with increased iron needs or those consuming primarily non-heme iron sources.
One pair, every claim cited. The two substances, the type, the mechanism, the recommendation, and the primary literature.
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What the row says.
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At a glance
- Substances
- Iron and Pantoprazole
- Pair type
- Caution
- Evidence (highest tier)
- Moderate
- Source citations
- 5 sources
- Stack Score effect
- −5 to your Stack Score (per scored caution row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Caution · Moderate evidence
Caution
What is happening. Pantoprazole suppresses gastric acid, reducing the acidic environment needed for efficient iron absorption. Long-term use can impair iron status, especially in patients with increased iron needs or those consuming primarily non-heme iron sources.
Mechanism. Pantoprazole elevates gastric pH by inhibiting the H+/K+ ATPase (proton pump). The resulting reduction in gastric acidity impairs the solubilization and reduction of iron from Fe3+ to Fe2+, which is necessary for DMT1-mediated absorption in the duodenum.
Recommendation. Monitor iron levels and ferritin during long-term pantoprazole therapy. Consider vitamin C co-administration with iron supplements to compensate for reduced gastric acidity, or use chelated iron forms.
Sources (5)
- Sarzynski E et al. Association between proton pump inhibitor use and anemia: a retrospective cohort study. Dig Dis Sci. 2011;56(8):2349-2353. PMID 21318590
- Fischer JAJ, Cherian AM, Bone JN, Karakochuk CD. The effects of oral ferrous bisglycinate supplementation on hemoglobin and ferritin concentrations in adults and children: a systematic review and meta-analysis of randomized controlled trials. Nutrition Reviews. 2023. PMID 36728680
- Rehman T, Agrawal R, Ahamed F et al.. Optimal dose and duration of iron supplementation for treating iron deficiency anaemia in children and adolescents: A systematic review and meta-analysis. PLoS One. 2025. PMID 39951396
- Gutema BT, Sorrie MB, Megersa ND et al.. Effects of iron supplementation on cognitive development in school-age children: Systematic review and meta-analysis. PLoS One. 2023. PMID 37368919
- Hansen R, Sejer EPF, Holm C, Schroll JB. Iron supplements in pregnant women with normal iron status: A systematic review and meta-analysis. Acta Obstetricia et Gynecologica Scandinavica. 2023. PMID 37403900
Stack Score
How this pair moves the number.
Effect on the composite score
If both Iron and Pantoprazole are in the same stack, this pair applies −5 to your Stack Score (per scored caution row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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