Trimethylamine oxide
Trimethylamine oxide, more commonly called trimethylamine N-oxide (TMAO), is a metabolite associated with gut microbial metabolism and dietary exposures, including fish intake.
Trimethylamine oxide, more commonly called trimethylamine N-oxide (TMAO), is a metabolite associated with gut microbial metabolism and dietary exposures, including fish intake. In biomedical research, circulating or urinary TMAO is studied as a risk marker and as a potential mediator linking diet, intestinal microbiota, renal handling, and metabolic disease. Recent work has examined its concentrations, renal clearance, and detection in conditions including type 2 diabetes, diabetic nephropathy, chronic kidney disease, and metabolic syndrome, as well as during SGLT-2 inhibitor treatment and calorie-restricted, fish-rich ketogenic diets.
TMAO has also been investigated for tissue-specific biological effects. Experimental studies have linked TMAO exposure to inflammatory and senescence-related pathways, including TXNIP/NLRP3 signaling and pyroptosis in cardiac aging, neuroinflammation associated with cognitive decline, and cGAS-STING/NF-κB signaling in bone-cell dysfunction and osteoporosis-related research. Conversely, TMAO has been studied as a chemical chaperone capable of alleviating unfolded-protein-induced endoplasmic-reticulum stress in diabetic cataract models. These findings present TMAO as a context-dependent molecule whose effects may vary by tissue, disease state, exposure, and renal clearance rather than as a uniformly harmful or beneficial compound.
Where the papers sit
9 papers from the last 6 months study trimethylamine oxide directly · updated from PubMed 2 Nov 2026
Study type 1 clinical trial · 1 observational · 1 human data · 6 preclinical
Themes one subject
Those 9 are all about one subject.
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TMAO-Related Health Effects
TMAO is being framed as a context-dependent link between diet, gut microbiota and metabolic disease, not merely a risk marker. Associations recur with diabetes, kidney dysfunction, cardiac aging, cognitive decline and bone senescence, alongside TXNIP/NLRP3, pyroptosis or cGAS-STING-NF-κB signaling. Diet, SGLT-2 inhibitors, training and microbiota-modulating therapy are being tested against circulating levels, renal clearance and tissue injury. Its chemical-chaperone benefit in diabetic cataract complicates a uniformly harmful interpretation and leaves tissue-specific causality open.
Papers
The 9 papers from the last 6 months that study trimethylamine oxide directly, newest first, by theme and by study type. Study types come from PubMed publication types and MeSH headings.
By theme
TMAO-Related Health Effects (9)
- Metabolic Changes During a Calorie-Restricted, Fish-Rich Ketogenic Diet Associated With Increased Circulating TMAO in Healthy Adults. Endocrinology, diabetes & metabolism · 16 Oct 2026 PMID 42885482
- Effects of SGLT-2 Inhibitors on Plasma Concentrations and Renal Clearance of the Risk Marker Trimethylamine-N-Oxide in Patients With Type-2 Diabetes. Endocrinology, diabetes & metabolism · 1 Oct 2026 PMID 42817074
- Cognitive-Motor Dual Task Training Synergistically Improves Aging-related Cognitive Dysfunction By Reducing TMAO and Suppressing TXNIP/NLRP3 Pathway. Molecular neurobiology · 28 Sept 2026 PMID 42804118
- Delay of diabetic cataract progression by a chemical chaperone trimethylamine N-oxide through alleviating unfolded-protein-induced ER stress. Experimental eye research · 18 Sept 2026 PMID 42759830
- Association between fish-related metabolites and metabolic syndrome risk factors in Japan: INTERLIPID metabolome -wide association study. European journal of nutrition · 30 Jul 2026 PMID 42530704
- Electric-Field Pixel Array Biosensor for Catalytic Ion Detection in Diabetic Nephropathy. ACS biomaterials science & engineering · 27 Jul 2026 PMID 42504484
- Gut Microbiota-Derived TMAO Drives MC3T3-E1 Senescence and Osteogenic Dysfunction via cGAS-STING-NF-κB Signaling: Implications for Age-Related Bone Loss. Calcified tissue international · 28 Jun 2026 PMID 42366244
- Trimethylamine N-oxide drives cardiac aging by activating NLRP3-mediated pyroptosis. Life sciences · 9 Jun 2026 PMID 42264141
- Shenqi Tangluo Pill demonstrates protective impacts on kidney damage in mice with type 2 diabetes through modulation of intestinal flora and the microbial metabolic product Trimethylamine N-oxide (TMAO). Phytomedicine : international journal of phytotherapy and phytopharmacology · 2 Jun 2026 PMID 42229382
By study type
Clinical trials (1)
- Effects of SGLT-2 Inhibitors on Plasma Concentrations and Renal Clearance of the Risk Marker Trimethylamine-N-Oxide in Patients With Type-2 Diabetes. Endocrinology, diabetes & metabolism · 1 Oct 2026 PMID 42817074
Observational studies and case reports (1)
- Association between fish-related metabolites and metabolic syndrome risk factors in Japan: INTERLIPID metabolome -wide association study. European journal of nutrition · 30 Jul 2026 PMID 42530704
Human data, design not indexed (1)
- Electric-Field Pixel Array Biosensor for Catalytic Ion Detection in Diabetic Nephropathy. ACS biomaterials science & engineering · 27 Jul 2026 PMID 42504484
Preclinical: animal, cell and lab studies (6)
- Metabolic Changes During a Calorie-Restricted, Fish-Rich Ketogenic Diet Associated With Increased Circulating TMAO in Healthy Adults. Endocrinology, diabetes & metabolism · 16 Oct 2026 PMID 42885482
- Cognitive-Motor Dual Task Training Synergistically Improves Aging-related Cognitive Dysfunction By Reducing TMAO and Suppressing TXNIP/NLRP3 Pathway. Molecular neurobiology · 28 Sept 2026 PMID 42804118
- Delay of diabetic cataract progression by a chemical chaperone trimethylamine N-oxide through alleviating unfolded-protein-induced ER stress. Experimental eye research · 18 Sept 2026 PMID 42759830
- Gut Microbiota-Derived TMAO Drives MC3T3-E1 Senescence and Osteogenic Dysfunction via cGAS-STING-NF-κB Signaling: Implications for Age-Related Bone Loss. Calcified tissue international · 28 Jun 2026 PMID 42366244
- Trimethylamine N-oxide drives cardiac aging by activating NLRP3-mediated pyroptosis. Life sciences · 9 Jun 2026 PMID 42264141
- Shenqi Tangluo Pill demonstrates protective impacts on kidney damage in mice with type 2 diabetes through modulation of intestinal flora and the microbial metabolic product Trimethylamine N-oxide (TMAO). Phytomedicine : international journal of phytotherapy and phytopharmacology · 2 Jun 2026 PMID 42229382
Written from 9 PubMed abstracts, each one listed by PMID above. Published: 2026-11-02. Drafted by language models from published abstracts; not medical advice.