The Claim

Daily consumption of 42 grams of walnuts for three weeks reduces fecal deoxycholic acid by 25% and lithocholic acid by 45% in healthy adults.

Source: Walnut Consumption Alters the Gastrointestinal Microbiota, Microbially Derived Secondary Bile Acids, and Health Markers in Healthy Adults: A Randomized Controlled Trial

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
60score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Quantitative
1 study reviewed
In plain English

Eating 42 grams of walnuts every day for three weeks lowers levels of two bile acids in the stool—deoxycholic acid by 25% and lithocholic acid by 45%—in healthy adults.

See the scientific wording

Daily consumption of 42 grams of walnuts for three weeks reduces fecal secondary bile acids deoxycholic acid by 25% and lithocholic acid by 45% in healthy adults, which may lower exposure to proinflammatory and potentially carcinogenic compounds in the colon.

Why this might work

Eating walnuts delivers fiber and fats that feed specific gut bacteria, which then outcompete other bacteria that turn bile acids into harmful chemicals. These good bacteria reduce the production of deoxycholic acid and lithocholic acid, lowering their levels in the colon.

Verified mechanismbased on 1 study

What the research says

1 study
  1. Study: Walnut Consumption Alters the Gastrointestinal Microbiota, Microbially Derived Secondary Bile Acids, and Health Markers in Healthy Adults: A Randomized Controlled Trial

    Eating a small handful of walnuts every day for three weeks lowered two gut chemicals linked to inflammation and colon cancer in a study of healthy adults. The study found exactly what the claim said: these harmful chemicals went down by 25% and 45%.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

Fit Body Science verdict — we translate health claims into clear verdicts backed by peer-reviewed research.

Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.