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But4.5
Butyrate Research
Likely helps
111 peer-reviewed studies
What the evidence says
Likely helps
Butyrate appears to help in 10 of 10 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 1992–2026 with a typical study size of 66 participants.
Based on 111 studies · 14 meta-analyses · 49 RCTs · 34,856 total participants
Confidence
High confidence
What the studies found
10helped· 101 more without graded effect data
By outcome
Digestive healthSmall IBS/colitis RCTs suggest reduced GI discomfort; mostly indirect data · 2-4 weeks
Likely helps98 studies
Therapeutic & clinical
Likely helps22 studies
Glucose & metabolicMechanistic SCFA role; no direct supplementation outcomes · 4-8 weeks
Mostly mechanism / observational8 studies
Heart & blood pressure
Mostly mechanism / observational6 studies
InflammationSmall trials hint at lower gut inflammation; strong mechanism, limited direct evidence · 4-8 weeks
Mostly mechanism / observational5 studies
Weight management
Mostly mechanism / observational5 studies
Depression & mood
Mostly mechanism / observational5 studies
Cholesterol & lipids
Mostly mechanism / observational4 studies
Cognitive function
Too few graded studies2 studies
Anxiety & stress
Too few graded studies2 studies
Immune supportPlausible gut-barrier/immune modulation; little direct supplement evidence · 4-8 weeks
Too few graded studies2 studies
Bone health
Too few graded studies2 studies
Skin health
Too few graded studies1 study
Safety profile
Too few graded studies1 study
By the numbers
Pulled from 44 studies with measurable effects
Likely real effects
57%
across studies
People studied
35k
typical study: 66 people
Strongest designs
63
14 pooled, 49 randomised
Showed benefit
100%
10/10 studies
How long studies ran
1–4 weeks
1
Populations Studied
Adults2
Chronic kidney disease patients1
Patients with depressive disorder1
Patients with depression, bipolar disorder, schizophrenia, and anxiety1
Active research area
82 studies in the last 5 years · Latest meta-analysis: 2026
199220092026
1Circulating acetate and propionate levelsMeta-Analysisn=9,661 · very large study2026
In plain English: CKD is associated with a profound systemic reduction in acetate and propionate, supporting the model of a compromised gut-kidney axis based on converging evidence.
Thakur D et al. · Nutrients (2026)
Borderline
Quantitative synthesis revealed a significant and consistent systemic depletion of circulating acetate and propionate in adult CKD patients compared to healthy controls (p < 0.05).
CKD is associated with a profound systemic reduction in acetate and propionate, supporting the model of a compromised gut-kidney axis based on converging evidence.
The divergent results for butyrate in paediatric versus adult populations suggest that SCFA metabolism is influenced by age-related factors or compensatory mechanisms.
2Chao1 diversity indexMeta-Analysisn=2,091 · very large study2023
In plain English: Depressive disorder is characterized by an increase of pro-inflammatory bacteria, while anti-inflammatory butyrate-producing genera are depleted.
Gao M et al. · Translational psychiatry (2023)
Noticeable benefit
← WorseNo effectBetter →
A random-effects model with restricted maximum-likelihood estimator was used to synthesize the effect size (assessed by standardized mean difference [SMD]) across studies.
In subgroup analyses with regional variations(east/west) as a predictor, patients who were in the West had a lower Chao1 level (SMD -0.42[-0.74 to -0.10]).
Subgroup meta-analysis showed Firmicutes level was decreased in patients with depressive disorder who were medication-free (SMD -1.54[-2.36 to -0.72]), but Bacteroidetes level was increased (SMD -0.90[0.07 to 1.72]).
3Phylogenetic diversity in psychiatric disordersMeta-Analysisn=1,519 · large study2021
In plain English: This systematic review and meta-analysis found that gut microbiota perturbations were associated with a transdiagnostic pattern with a depletion of certain anti-inflammatory butyrate-producing bacteria and an enrichment of pro-inflammatory bacteria in patients with depression, bipolar disorder, schizophrenia, and anxiety.
Nikolova VL et al. · JAMA psychiatry (2021)
Noticeable benefit
← WorseNo effectBetter →
There was a small decrease in phylogenetic diversity (SMD = -0.24; 95% CI, -0.47 to -0.001) and no significant differences in Shannon and Simpson indices.
4Gut microbiota composition in psychiatric disordersSystematic Reviewn=2,510 · very large study2022
In plain English: Our syntheses also identified specific bacterial taxa commonly associated with mental disorders, including lower levels of bacterial genera that produce short-chain fatty acids (e.g. butyrate), higher levels of lactic acid-producing bacteria, and higher levels of bacteria associated with glutamate and GABA metabolism.
McGuinness AJ et al. · Molecular psychiatry (2022)
We also observed substantial heterogeneity across studies with regards to methodologies and reporting.
Further prospective and experimental research using new tools and robust guidelines hold promise for improving our understanding of the role of the gut microbiota in mental and brain health and the development of interventions based on modification of gut microbiota.
In plain English: Gut microbiota dysbiosis was associated with rheumatic diseases, principally with potentially non-specific, shared alterations of microbes.
Wang Y et al. · EBioMedicine (2022)
Gut microbiota dysbiosis was associated with rheumatic diseases, principally with potentially non-specific, shared alterations of microbes.
In plain English: Dietary fiber intervention, particularly involving fructans and galacto-oligosaccharides, leads to higher fecal abundance of Bifidobacterium and Lactobacillus spp. but does not affect α-diversity.
So D et al. · The American journal of clinical nutrition (2018)
Dietary fiber intervention, particularly involving fructans and galacto-oligosaccharides, leads to higher fecal abundance of Bifidobacterium and Lactobacillus spp. but does not affect α-diversity.
Further research is required to better understand the role of individual fiber types on the growth of microbes and the overall gut microbial community.
8Biologics response prediction in IBDSystematic Reviewn=38 · small study2024
In plain English: IBD patients who responded well to vedolizumab treatment had higher levels of specific bacteria that produce butyrate, along with increased levels of metabolites such as butyrate, branched-chain am...
Wang C et al. · Microbiological research (2024)
IBD patients who responded well to vedolizumab treatment had higher levels of specific bacteria that produce butyrate, along with increased levels of metabolites such as butyrate, branched-chain amino acids and acetamide following vedolizumab treatment.
Crohn's disease patients who responded positively to ustekinumab treatment showed higher levels of Faecalibacterium and lower levels of Escherichia/Shigella.
In plain English: Allergy published by European Academy of Allergy and Clinical Immunology and John Wiley & Sons Ltd.
Sasaki M et al. · Allergy (2024)
Overall, there was some evidence showing that the three main SCFAs (acetate, propionate and butyrate) in the first few years of life had a protective effect against allergic diseases, especially for atopic dermatitis, wheeze or asthma and IgE-mediated food allergy in childhood.
The association between each SCFA and allergic disease appeared to be different by disease and the age of assessment.
Allergy published by European Academy of Allergy and Clinical Immunology and John Wiley & Sons Ltd.
In plain English: Our research found universally applicable biomarkers and investigated their potential roles in promoting human health at high altitudes.
Zhao H et al. · Gut microbes (2024)
Functional analysis and qPCR revealed that butyrate may be a functional metabolite in high-altitude adaptation.
A high-altitude rat model showed that butyrate reduced intestinal damage caused by high altitudes.
According to cell experiments, butyrate may downregulate hypoxia-inducible factor-1α (HIF-1α) expression and blunt cellular responses to hypoxic stress.
In plain English: In this study, we demonstrated that the promising substate (prebiotics), microbe (probiotics), metabolite (postbiotics), and target are suitable for obsesity treatment, providing a microbiome basis for further research.
Oh KK et al. · Cells (2022)
Then, we implemented protein-protein interaction (PPI) networks with 342 overlapping target, another subnetwork was constructed with the top 30% degree centrality (DC), and the final core networks were obtained after screening the top 30% betweenness centrality (BC).
The final core targets were IL6, AKT1, and ALB.
We showed that the three core targets interacted with three other components via the MSMT network in alleviating obesity, i.e., four microbiota, two substrates, and six metabolites.
In plain English: Although a definitive interpretation is limited by the cross-sectional design of published reports, we integrated findings of microbial composition and downstream functional pathways and metabolites, offering possible explanations regarding age-related processes.
Badal VD et al. · Nutrients (2020)
Beta diversity distances significantly differed across various developmental stages and were different even between oldest-old and younger-old adults.
Differences in taxonomic composition and functional potential varied across studies, but Akkermansia was most consistently reported to be relatively more abundant with aging, whereas Faecalibacterium, Bacteroidaceae, and Lachnospiraceae were relatively reduced.
Although a definitive interpretation is limited by the cross-sectional design of published reports, we integrated findings of microbial composition and downstream functional pathways and metabolites, offering possible explanations regarding age-related processes.
13Immunity, infections, inflammation and vaccine responsesSystematic Review2026
In plain English: Further research is needed to clarify the mechanisms involved and to optimize health applications.
Arioz Tunc H et al. · Critical reviews in food science and nutrition (2026)
A systematic review of human studies showed that prebiotics, including GOS, FOS, and 2'-fucosyllactose (2FL), reduced infections and increased IgA in healthy infants, while yeast β-glucan reduced respiratory infection symptoms in healthy adults.
Yeast β-glucan and GOS supplementation resulted in improvements in NK cell activity.
Some effects on vaccine efficacy were noted in young adults, but the overall impact of NDCs and prebiotics on vaccination and systemic inflammation was inconsistent.
15Efficacy of sodium butyrate formulations in intestinal diseasesReview2026
In plain English: Differences between clinical study results suggests that formulation of butyrate impacts its efficacy.
Caban M et al. · Digestive diseases and sciences (2026)
Therefore, we suggest that clinical results should be assessed in relation to specific preparations.
Our summary confirms that specific microencapsulated versions, including those utilizing the MSB® technology are valuable therapeutic options supporting the treatment of intestinal diseases.
Differences between clinical study results suggests that formulation of butyrate impacts its efficacy.
16gut microbiota and short-chain fatty acids in cardiometabolic HFpEFReview2026
In plain English: Targeting gut-heart axis and SCFAs pathways may represent a biologically plausible and low-risk approach that could help attenuate inflammation and metabolic dysfunctions in patients with cardiometabolic HFpEF, offering novel potential therapeutic targets for their management.
This review summarizes current evidence linking gut microbiota dysfunction to cardiometabolic HFpEF, elucidates the mechanistic role of SCFAs, and discusses nutritional approaches aimed at enhancing their production and activity.
Targeting gut-heart axis and SCFAs pathways may represent a biologically plausible and low-risk approach that could help attenuate inflammation and metabolic dysfunctions in patients with cardiometabolic HFpEF, offering novel potential therapeutic targets for their management.
17gestational weight gain reductionMeta-Analysisn=46 · small study2025
In plain English: Future studies should focus on personalized probiotic interventions and long-term maternal-child health effects.
Jia X, Sun S, Ci Z. · Frontiers in cellular and infection microbiology (2025)
Noticeable benefit
← WorseNo effectBetter →
Likely real
Results Probiotic supplementation, especially multispecies formulations, initiated in the first trimester led to a mean reduction in gestational weight gain (GWG) of 1.25 kg (95% CI: -1.78 to -0.72 kg; p < 0.001) compared to controls.
Furthermore, postpartum weight retention was reduced by an average of 1.05 kg (95% CI: -1.53 to -0.58 kg; p < 0.001) when probiotic use extended into the postpartum period.
The heterogeneity in strains, dosage, and duration and pooled analysis consistently favored probiotic intervention.
In plain English: Future Perspectives : Expand data on underrepresented groups (African Americans, Latinos), unify SCFA detection methods, and conduct long-term RCTs to validate intervention efficacy and "genetics-microbiota-metabolism" crosstalk-critical for CRC precision prevention.
He Y, Peng K, Tan J, Hao Y, Zhang S, Gao C, Li L. · Nutrients (2025)
Noticeable benefit
← WorseNo effectBetter →
Results : Total SCFAs were negatively associated with CRC (OR = 0.78, 95% CrI: 0.65-0.92) and A-CRA (OR = 0.72, 95% CrI: 0.59-0.87), with butyrate showing the strongest protective effect (CRC: OR = 0.63, 95% CrI: 0.51-0.77).
Ethnic heterogeneity was significant: Europeans had the strongest protection (OR = 0.71), Asians had weaker protection (OR = 0.86), and African Americans had the lowest fecal SCFA levels and the highest CRC risk.
Fecal SCFAs showed a stronger CRC association than serum/plasma SCFAs (OR = 0.73 vs. 0.85).
20Gut-brain health and systemic inflammationSystematic Review2026
In plain English: Therapeutic strategies that restore BPB populations and butyrate levels, such as prebiotics, dietary fiber, and microbiota-targeted interventions, hold promise for mitigating inflammation and enhancing systemic health through microbiome modulation.
Snodgrass JL et al. · International journal of molecular sciences (2026)
Butyrate supports colonocyte energy metabolism, reinforces epithelial barrier function, regulates goblet cell mucus production, and exerts anti-inflammatory effects via histone deacetylase inhibition and G-protein-coupled receptor signaling.
The depletion of BPB and the resultant butyrate deficiency may represent a unifying pathophysiological mechanism underlying these conditions.
Therapeutic strategies that restore BPB populations and butyrate levels, such as prebiotics, dietary fiber, and microbiota-targeted interventions, hold promise for mitigating inflammation and enhancing systemic health through microbiome modulation.