Trimethylamine- N -oxide formation, the bacterial taxa involved and intervention strategies to reduce its concentration in the human body.
Level 5 - mechanism / opinion, no new human data
Narrative review of mechanisms and hypothetical interventions without systematic search or primary human data
PubMed 40598778 · doi:10.1080/07853890.2025.2525403
What was done
The authors reviewed the multi-step metaorganismal pathways of trimethylamine-N-oxide (TMAO) formation from dietary betaine, L-carnitine, and choline via gut microbiota enzymes and hepatic flavin-containing monooxygenases. They compiled a database of bacterial taxa involved in TMA production and summarized tested and theoretical intervention strategies targeting nutrition, gut bacteria, bacterial enzymes, and host enzymes.
What was found
The abstract reports no quantitative results, sample sizes, or effect estimates. It qualitatively describes the biochemical pathways involved in TMAO synthesis and concludes that precision multi-target strategies—such as combining dietary precursor restriction with selective inhibition of TMA-producing bacteria—represent the most promising approach.
Why it matters
TMAO promotes cardiovascular and chronic kidney disease. This review synthesizes the specific bacterial taxa and enzymatic steps responsible for its generation to help guide targeted dietary and microbiome-based interventions.
Limits
As a narrative review, this paper presents no original experimental or clinical trial data. The abstract provides no quantitative data, search methodology, or clinical outcome comparisons, and many discussed interventions remain hypothetical.
Cited by
- supports Gut bacteria determine whether dietary L-carnitine and choline are converted into TMAO.