The Study
Sulforaphane and Sulforaphane-Nitrile Metabolism in Humans Following Broccoli Sprout Consumption: Inter-individual Variation, Association with Gut Microbiome Composition, and Differential Bioactivity
This study found that people who have certain kinds of gut bacteria seem to break down broccoli chemicals differently, but it didn't test if that makes people healthier. It's like noticing that people who eat more carrots have brighter skin — it doesn't mean carrots cause brighter skin, just that they're linked.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
When you eat broccoli sprouts, your body turns a compound into sulforaphane, which may help prevent cancer — but only if your gut bacteria help make it. Some people’s bacteria make lots of it; others make mostly a useless version.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 579 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — if your gut has the right bacteria, you get more cancer-fighting benefits from broccoli; if not, you get mostly inactive compounds.
- 2SFN-NIT (the useless version) stays in blood 9.9 hours; active SFN is gone in 2.7 hours.
- 3People with Bifidobacterium or Dorea bacteria excreted more active SFN.
- 481% of differences in SFN levels were explained by gut bacteria.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Molecular nutrition & food research
Year
2023
Authors
John A Bouranis, L. Beaver, Carmen P Wong, Jaewoo Choi, Sean Hamer, Edward W. Davis, Kevin S Brown, D. Jiang, T. Sharpton, J. Stevens, Emily Ho
Related Content
Claims (4)
Eating one serving of broccoli sprouts does not change the types or amounts of bacteria in the gut of healthy adults over three days, based on standard measures of microbial diversity and abundance.
After eating broccoli sprouts, the main compound found in human blood is sulforaphane-nitrile. It stays in the body longer than other related compounds, with a half-life of about 9.9 hours versus 2.7 hours, but does not produce measurable biological effects in prostate cells.
The amount of sulforaphane metabolites excreted by healthy adults after eating broccoli sprouts varies between individuals, and this variation is linked to the types of bacteria present in their gut, with certain bacteria associated with higher or lower excretion levels.
When humans eat broccoli sprouts, the body removes sulforaphane metabolites mainly through urine, and very little is removed through stool, meaning the liver does not play a major role in getting rid of these compounds.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.