When you eat processed meats like bacon or hot dogs, chemicals in them can turn into harmful substances in your stomach that can damage your DNA and might cause cancer.
Evidence from Studies
Supporting (4)
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The study looked at people eating foods with nitrites and nitrates, like cured meats, and found it increased cancer risk, which matches the claim that these can form harmful chemicals in the stomach.
The study found that eating foods with nitrites and nitrates, like processed meats, can lead to harmful chemicals that raise cancer risk, which backs up the claim.
Dietary Nitrosamines from Processed Meat Intake as Drivers of the Fecal Excretion of Nitrosocompounds
The study shows that eating processed meats leads to more harmful chemicals in the gut that can damage cells, which supports the idea that these meats might cause cancer.
N-Nitrosamines: A Potential Hazard in Processed Meat Products.
The study says that nitrites and nitrates in processed meats can turn into harmful chemicals in your stomach that might cause cancer, which matches the claim exactly.
Contradicting (1)
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Dietary Nitrates, Nitrites, and Nitrosamines Intake and the Risk of Gastric Cancer: A Meta-Analysis
This study looks at eating foods with nitrates and nitrites and finds that while some (like nitrites) might increase cancer risk, others (like nitrates) might actually lower it, so it doesn't fully agree with the claim that they all cause cancer.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.