correlational
Analysis v1
Strong Support
People who live in Sendai, Japan are more than twice as likely to have gut bacteria that turn soy into a helpful compound called equol, compared to people elsewhere — probably because of local lifestyle or environmental habits.
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Evidence from Studies
Supporting (1)
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Community contributions welcome
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Levels of urinary isoflavones and lignan polyphenols in Japanese women
Cross-Sectional Study
Human
2013 SepThe study found that women living in Sendai were more than twice as likely to have gut bacteria that turn soy into equol, compared to women in other Japanese cities, which matches the claim.
Contradicting (0)
0
Community contributions welcome
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.