Vegan diet journal gut microbiota

Impact of vegan diets on gut microbiota: An update on the clinical implications

Rheumatoid arthritis treated with vegetarian diets. Faecalibacterium prausnitzii has also been recognized as vegan diet journal gut microbiota one of the most abundant butyrate producers in human feces.

Although the DNA fingerprints did not cluster according to the dietary types data not shownin agreement with a previous study [ 24 ], an approximate separation between the three diets was observed using RNA fingerprints.

Subjects who followed a vegan diet for vegan diet journal gut microbiota month, were found to have improved blood glucose levels and reduced body weight, as well as a reduction in triglycerides, total cholesterol, LDL-cholesterol and Hemoglobin A1c. A substantial limitation of comparing studies of gut microbiota lies in the different methodologies utilized, as molecular biology has advanced rapidly in recent years, beyond conventional culturing techniques, to allow substantially greater detection of the number and diversity of human gut microbiota [32,50,69].

A second strategy is based on releasing bacteriostatically or microbicidally acting substances such as short-chain fatty acids, hydrosulphide, hydrogen peroxide, antibioticswhich additionally inhibit the growth of pathogenic germs Hentges, Moreover, the microbiota of obese subjects was associated with markers of local and systemic inflammation fecal calprotectin and plasma C-reactive protein, respectively.

Although diet-induced modification in intestinal flora and a reduction in inflammation severity may be a contributing factor to Nutrients6 the improvements seen in RA patients, it is important to note that other features of a vegan diet have been credited with alleviating RA symptoms among vegan diet adherents.

Combined, the 10 first dietary PCs explained In addition, E. In addition, Proteobacteria prefer proteins as the main source of energy, which explains their higher counts in ovo-lacto-vegetarians and omnivores. It is important to note that Zimmer found that vegans and vegetarians were not significantly different from each other in these four taxa, nor did they differ in Enterobacter, Enterococcus, Clostridium, Klebsiella or Lactobacillus, when compared to each other or to the omnivore samples.

Open in a separate window Diet history is a factor that must be considered in the analysis of gut microbiota of any subjects [ 27 ]. Other products released by Bifidobacterium and Lactobacillus species, for instance, lactic acid or acetic acid, decrease the pH value.

Findings from the adventist cohorts. Clustering analysis used Manhattan distances for the microbiota samples and correlation coefficients for micronutrients or metabolites.

Notably, the vegan diet was associated with a decrease in pathobionts such as Enterobacteriaceae, a family of bacteria implicated in triggering low-grade inflammation, which Zimmer [ 42 ] also found were reduced in vegan subjects. As is evident, the number of subjects in the reduced samples of vegans and vegetarians was too small to reach significance, except for bifidobacteria comparing vegans with CG2.

We observed differences between the groups in macronutrient and micronutrient consumption, the composition of the gut microbiota, and plasma and urinary metabolomes. However, in a recent study it has been reported that there was no significant difference for Bifidobacterium between the three diets [ 35 ].

Both the complete and reduced nutritional data were used in subsequent analyses. These results suggest that the composition of the human gut is altered by diet along a continuum, with vegan diets being the most distinct from that of omnivores, but not necessarily significantly different from that of other vegetarians.

Plasma metabolome of vegans differed markedly from omnivores but the gut microbiota was surprisingly similar. Genera proportional abundance for each sample is detailed in Supplementary Results 1. Table 3: Moreover, counts of Bacteroidetes related operational taxonomic units OTUs were greater in vegans and vegetarians compared to omnivores.

We further sought to identify oral bacterial taxa associated with markers of systemic low-grade inflammation. A simple explanation for this could be the absence of food containing LAB, such as yogurt, cheese and fermented meat products, in the vegan diet, as these foods can enrich gut LAB populations since these bacteria can easily survive gastric transit [ 14 ].

The vegan gut profile appears to be unique in several characteristics, including a reduced abundance of pathobionts, including Enterobacteriacea [ 3342 ], and a greater abundance of protective species such as F. Thus dietary fiber may be a key variable in any evaluation of vegan diets and inflammatory disease.

Author Contributions Conceived and designed the experiments: Full size table Vegetarians The vegetarian sample consisted of subjects 49 males and 95 females; age: The role of inflammasomes in regulating gut flora and the subsequent impact on metabolic syndrome is an exciting new field of study which may help elucidate the mechanism by which diet impacts gut microflora, inflammation and health.

To ensure that the transport did not have any effects on the cultured species, a storage study was performed with 20 fresh samples. Materials and methods Collection of stool samples for microbiological analysis Our test group consisted of volunteers on a strict vegetarian or vegan diet who were approached during the 38th World Vegetarian and Vegan Congress in Dresden, Germany, between 27 July and 3 August Barnard et al.

The authors suggest that diet change may induce shifts within core members but the overall bacterial populations show resilience and return to baseline levels after the dietary intervention ceases. The benefit of using faecal samples to investigate the intestinal microbiota is obvious: However, this would also need independent and experimental proof.

It is intriguing to speculate that a richer gut microbiota is advantageous to the host, since greater taxonomic richness might also mean greater functional diversity, there is, however still little empirical evidence to support this notion Cho and Blaser, ; Clemente et al.This is an open access journal, and health allows us the opportunity to assess whether the vegan gut microbiota is distinct, and whether the health advantages characteristic of a vegan diet.

Diet and lifestyle have a strong influence on gut microbiota, which in turn has important implications on a variety of health-related aspects. Despite great advances in the field, it remains unclear to which extent the composition of the gut microbiota is modulated by the intake of animal derivedCited by: 6.

The inclusion of vegan diets in studies of gut microbiota and health allows us the opportunity to assess whether the vegan gut microbiota is distinct from that of vegetarians and omnivores, and whether the health advantages characteristic of a vegan diet may be partially explained by the associated microbiota by:  · Dietary effects on the human gut microbiota have been extensively studied, and long-term dietary habits have been shown to affect the diversity and composition of the human gut microbiota 1, by: 2.

The most recent evidence that a vegan diet promotes a gut microbiota that directly reduces metabolic disease risk is the research linking diet to L-carnitine metabolism and atherosclerosis risk.

Healthy gut microbiota composition is subject to variation due to age, genetics, environment, diet and gut wall structure. Gut colonization starts at birth with a composition depending on the type of delivery and subsequently on the type of diet [18], [19].Cited by:

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