Nutrition
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Review Meta Analysis
Gut microbiota-dependent trimethylamine N-oxide and all-cause mortality: Findings from an updated systematic review and meta-analysis.
The gut microbiota-derived metabolite trimethylamine N-oxide (TMAO) has been regarded as one of the potent risk factors for cardiovascular events and diabetes. In the current meta-analysis we quantitatively summarized and updated the results of studies regarding the association between TMAO and mortality. A systematic search was performed from PubMed, ProQuest, Scopus, and Embase. ⋯ There were 31 230 participants included and the results showed that being in the highest category of TMAO increased the hazard ratio (HR) of mortality by 47%. Moreover, there was a non-linear association between increased TMAO concentrations and HR of mortality. In the current dose-response meta-analysis, we revealed a positive association between TMAO and mortality risk among an adult population.