correlational
Strong Support
Foods like spinach and rhubarb have a lot of a substance called oxalate, and if you eat them, your body might pass more oxalate in your urine — especially if you're someone who’s more likely to be affected by it.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Oxalate in Foods: Extraction Conditions, Analytical Methods, Occurrence, and Health Implications
Narrative Review
2023 Aug 25This study says that foods like spinach and rhubarb have a lot of oxalate, and that can lead to more oxalate in urine, which might cause kidney stones—exactly what the claim says.
Contradicting (0)
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No contradicting evidence found
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.