NutriStack
Pantoprazole and Vitamin C, a synergy.
Pantoprazole, like other PPIs, may reduce gastric vitamin C levels by altering the gastric pH environment. Vitamin C supplementation can help maintain adequate levels and provide additional benefit by enhancing iron absorption in the achlorhydric environment.
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
- Pantoprazole and Vitamin C
- Pair type
- Synergy
- Evidence (highest tier)
- Moderate
- Source citations
- 4 sources
- Stack Score effect
- +2 to your Stack Score (per scored synergy row).
- Scope
- Supplement × Prescription
- Last verified
- May 30, 2026
Synergy · Moderate evidence
Synergy
What is happening. Pantoprazole, like other PPIs, may reduce gastric vitamin C levels by altering the gastric pH environment. Vitamin C supplementation can help maintain adequate levels and provide additional benefit by enhancing iron absorption in the achlorhydric environment.
Mechanism. Pantoprazole-induced gastric pH elevation promotes oxidation of ascorbic acid to dehydroascorbic acid, reducing vitamin C bioavailability from dietary sources. Supplemental vitamin C provides the reduced form directly.
Recommendation. Consider vitamin C supplementation (250-500mg/day) during long-term pantoprazole therapy, especially if also concerned about iron absorption.
Sources (4)
- Henry EB et al. Proton pump inhibitors reduce the bioavailability of dietary vitamin C. Aliment Pharmacol Ther. 2005;22(6):539-545. PMID 16167971
- Bayu P, Wibisono JJ. Vitamin C and E antioxidant supplementation may significantly reduce pain symptoms in endometriosis: A systematic review and meta-analysis of randomized controlled trials.. PLoS One. 2024. PMID 38820340
- Wen C, Li Y, Hu Q et al.. IV Vitamin C in Sepsis: A Latest Systematic Review and Meta-Analysis.. International Journal of Clinical Practice. 2023. PMID 36743822
- Jenkins DJA, Spence JD, Giovannucci EL et al.. Supplemental Vitamins and Minerals for Cardiovascular Disease Prevention and Treatment: JACC Focus Seminar.. Journal of the American College of Cardiology. 2021. PMID 33509399
Stack Score
How this pair moves the number.
Effect on the composite score
If both Pantoprazole and Vitamin C are in the same stack, this pair applies +2 to your Stack Score (per scored synergy row).
The full algorithm, the clamping rules, and four worked stacks are documented at /methodology/stack-score.
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