Effects of Walnut Supplementation on Short-Chain Fatty Acid Levels in Healthy Volunteers

Studied

A walnut-intake study measured stool metabolites and explored their relationship with the microbial metabolite urolithin A.

Who / model

Participants included people with and without obesity. The abstract does not state sample size, intervention duration or the assigned comparison regimen.

Studied dose & schedule

Dose and schedule have not yet been extracted for this summary.

Found

Walnut intake was associated with 2.8% greater gut microbial diversity, a 17.6% lower ratio of two bacterial groups and reductions in three measured metabolites. Changes were more pronounced with obesity. The abstract reports no urolithin-A-specific treatment effect.

Limits

Study limitations were not stated in the abstract. Methodological quality has not been appraised.

Read summary source ↗ · Prepared 9/15/2026 · AI-assisted, source-based summary