Story perspectives

Vitamin C Cuts Cancer-Linked Nitrosation From Nitrate Foods

5/21/2026

Summary

Waterloo Researchers Show

University of Waterloo researchers released a model showing vitamin C can cut nitrosation compounds causing cancer.
Simulation of saliva, stomach, intestine and plasma found vitamin C with nitrate-rich foods reduces nitrosation.
Researchers said vitamin C supplements after meals may lower carcinogen formation, a result Dr Gordon McNicol said could explain cancer-nitrate research.
The model identified nitrate/nitrite load, vitamin C level, meal timing, pH and oral microbiome as key risk drivers.

Summary

Model Oversimplifies

The model treats the stomach as a single well-mixed compartment, potentially overlooking spatial acid variations.
Mouthwash and other dental interventions were flagged as major modifiers of salivary nitrate-to-nitrite conversion, though long-term health impact is uncertain.
Polyphenols were excluded from the simulation despite evidence they can competitively inhibit nitrosation.
Waterborne nitrate was modeled separately and found to be a secondary contributor to gastric NOC formation versus dietary nitrate.

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Waterloo Researchers Show

University of Waterloo researchers released a model showing vitamin C can cut nitrosation compounds causing cancer.
Simulation of saliva, stomach, intestine and plasma found vitamin C with nitrate-rich foods reduces nitrosation.
Researchers said vitamin C supplements after meals may lower carcinogen formation, a result Dr Gordon McNicol said could explain cancer-nitrate research.
The model identified nitrate/nitrite load, vitamin C level, meal timing, pH and oral microbiome as key risk drivers.

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