correlational
Analysis v1
Strong Support
In some Japanese women who can make a compound called equol, the more daidzein their bodies process, the more equol they tend to produce — probably because of the right gut bacteria.
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0
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 Japanese women who produce equol have higher levels of equol in their urine when they also have more daidzein, which matches the claim exactly.
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.