Fermentable Oligosaccharides, Disaccharides, Monosaccharides And Polyols Research Articles

A244 PROVIDING THE FODMAP DIET THROUGH AN ONLINE PLATFORM: IMPACT ON THE QUALITY OF LIFE AND THE PHYSICAL AND PSYCHOLOGICAL SYMPTOMS IN IRRITABLE BOWEL SYNDROME

BackgroundIrritable bowel syndrome (IBS) is a functional gastrointestinal disorder that affects approximately 15 % of the worldwide population. It is characterized by recurring abdominal pain and changes in bowel habits. This population is more at risk of suffering from chronic fatigue and psychological distress. Moreover, IBS significantly reduces the quality of life of patients and increases the economic burden on the health system. Many therapies have been developed to try to alleviate the symptoms and improve the lives of people with IBS. Among these is the FODMAP ( Fermentable Oligosaccharides Disaccharides Monosaccharides and Polyols) diet which aims to establish a personal tolerance to these nutrients (carbohydrates) that accentuate the symptoms related to IBS. This diet, lasting on average twelve weeks, is separated into three steps: elimination, reintroduction, and personalization. An innovative approach has been developed by the online platform SOSCuisine.com® to allow people with IBS to safely follow the FODMAP diet in a ‘self-service’ way. It consists of using an online service of personalized weekly menus low in FODMAP with tips and instructions for each step of the diet in combination with access to a peer support group, moderated by a specialized registered dietician.AimsThe aim of this project is to evaluate the impact of this new online service on the quality of life and the control of the physiological and psychological symptoms of people living with IBS. We hypothesized that this online service improve the quality of life and the control of the symptoms.MethodsThe participant has to be at least 18 years old, understand French, have access to Internet and a Facebook account (sufficient familiarity to use them) and have an IBS diagnosis (Rome IV criteria) validated or re-validated by a gastroenterologist within three months. People with eating disorders, mental health problems, other chronic gastrointestinal illnesses (except gastroesophageal reflux disease), diabetes and with a pregnancy are excluded. Validated questionnaires are used to assess the quality of life ( IBS-Quality Of Life), physical symptoms ( IBS-Severity Scoring System), state and trait ( State-Trait Anxiety Inventory, Form Y) whereas food intake is assessed with a online 24-hour dietary recall.ResultsSo far, 35 participants have been included in the study (83% female, 45,3±12,8 years old). After the intervention, the severity of symptoms significantly decreased (p<0.001), and quality of life (p=0.041) and state anxiety (p=0.034) significantly improved.ConclusionsThis study should allow the identification of facilitating elements to adhere to the FODMAP diet and possibly improve the quality of life of this population.Funding AgenciesNone

Food intolerances and the small intestine

The article presents an analysis of the literature on food intolerance (FS) associated with the presence in the diet of fermentable oligodimosaccharides and polyols FODMAP (fermentable oligosaccharides, disaccharides, monosaccharides and polyols), histamine and food additives. The relationship between FS and insufficient activity of enzymes of the small intestine mucosa, in particular, in patients with irritable bowel syndrome, is discussed. FS often noted in them forces them to strictly adhere to the elimination diet and significantly impair the quality of life due to dissatisfaction with the results of treatment. Analysis of the literature has confirmed in many patients with irritable bowel syndrome an etiotropic relationship with poor food tolerance and dictates the need for randomized studies to further study the pathogenetic mechanisms of increasing food tolerance under the influence of cytoprotective therapy.

FODMAP modulation as a dietary therapy for IBS: Scientific and market perspective.

A diet low in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) is a promising therapeutic approach to reduce gastrointestinal symptoms associated with irritable bowel syndrome (IBS). However, a shift toward a more sustainable, healthy diet with higher inclusion of whole-grain cereals (i.e., wheat, rye, barley) and pulses, naturally rich in FODMAPs, poses a severe challenge for susceptible individuals. Dietary restriction of fermentable carbohydrates (commonly called the "low FODMAP diet") has received significant consideration. Hence, the development of functional low FODMAP products is emerging in food science and the food industry. In this review, we evaluate the most promising yet neglected (bio)-technological strategies adopted for modulating the FODMAP contents in complex food systems and the extent of their uptake in the global food market. We extensively investigated the global low FODMAP market, contrasted with the status quo in food science and discussed the key principles and concomitant challenges of targeted FODMAP reduction strategies. Powerful tools are available which are based either on the use of ingredients where FODMAPs have been physically removed (e.g., by membrane filtration) or biotechnologically reduced during the food processing, mediated by added enzymes, microbial enzymes during a fermentation process, and seed endogenous enzymes. However,<10% of the small market of functional products with a low FODMAP claim (total ∼800 products) used any of the targeted FODMAP reduction techniques. The global market is currently dominated by gluten-free products, which are naturally low in FODMAPs and characterized by inferior sensory attributes.

February 2022 Imaging Case of the Month: Between A Rock and a Hard Place

No abstract available. Manuscript truncated after 150 words. Clinical History: A 46-year-old woman presented to her primary care physician with longstanding complaints of difficulty with aerobic exercise, near syncope, headache, poor sleep, and pain in both legs and arms, exacerbated when flying in commercial aircraft. The patient had also complained of several gastrointestinal disturbances recently that prompted evaluation, revealing a normal colonoscopy. The patient was diagnosed with probable food intolerance by breath testing showing fructose intolerance, managed with a low fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) diet with positive results. PMH, SH, FH: The patient’s past medical history was remarkable for a history of Raynaud’s phenomenon and head trauma at age 16. She noted that her presenting complaints have been present since childhood to some extent. Her poor sleep was characterized as frequent awakenings, daytime somnolence, mouth dryness, and waking up with severe headaches. The patient had been diagnosed with COVID-19 4 months earlier, with her presenting …

The effect of low FODMAP diet with and without gluten on irritable bowel syndrome: A double blind, placebo controlled randomized clinical trial.

Although the effects of low fermentable oligosaccharide, disaccharide, monosaccharide, and polyol (FODMAP) diet on amelioration of irritable bowel syndrome (IBS) symptoms have been reported previously, it has not yet been elucidated whether the gluten of wheat and barley induces the symptoms or only their fructans lead to aggravation of the symptoms. The aim of this study was to assess the effect of low FODMAPs diet with vs. without gluten on clinical symptoms in IBS patients. In this double-blind, placebo-controlled randomized trial, forty nine IBS patients were randomly assigned to placebo and/or intervention group. Patients in the intervention group received 5 gr/day of gluten powder with low FODMAP diet, while placebo group received 5 gr of rice flour as placebo, with low FODMAP diet. Quality of life (QoL) and IBS-SSS (symptom severity score) were measured before and after the intervention using a valid QoL questionnaire and a standard visual analog scale, respectively. Significant improvements were observed in total scores of IBS-SSS (-32% vs. - 49%), abdominal pain intensity (-45% vs.-52%), and frequency (-26 vs.-46%), abdominal distension (-29% vs.-63%), Interference with community function (-14% vs.-45%) and quality of life (+23 vs.+32%) in both gluten and placebo groups respectively (P<0.05). Only 5 patients in the gluten-containing diet reported exacerbation of their symptoms. Exacerbation of IBS symptoms after wheat and barley consumption is due to their fructan, and not related to their gluten content in most of the patients. IRCT20100524004010N29.

FODMAPs, inflammatory bowel disease and gut microbiota: updated overview on the current evidence.

Based on the fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) hypothesis, the low-FODMAP diet has been suggested as a potential therapeutic approach for inflammatory bowel disease (IBD) with promising results on disease management. However, this diet implies a specific broad food restriction, which potentially increases the risk of nutritional deficiencies and may aggravate gut microbiota dysbiosis of IBD patients. The aim of the present study is to review the effect of individual FODMAPs on the human gut microbiota. In addition, this narrative review provides an updated overview of the use of the low-FODMAP diet in IBD, namely the implementation, advantages, limitations, and the impact on the gut microbiota. The literature search strategy was applied to PubMed and Web of Science using relevant keywords, IBD, FODMAPs, Fructose, Lactose, Polyols, FOS, GOS, low-FODMAP diet and gut microbiota. Current data suggest that the low-FODMAP diet may effectively improve clinical outcomes in the management of IBD and ensure better quality of life for IBD patients. However, there is evidence highlighting some issues of concern, particularly the adequacy of the diet and the impact on the gut microbiota. The various FODMAP types differently modulate the gut microbiota. IBD management should be achieved with the least possible dietary restriction to avoid detrimental consequences, particularly on nutritional adequacy and gut microbiota. Thus, it is important to individualize and monitor the nutrition intervention. Further studies are required to better characterize the relationship between diet, the gut microbiota, and IBD to support the generalization of this approach for clinical practice in IBD therapy and management.

Existing differences between available lists of FODMAP-containing foods.

reduced intake of fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs) is useful to treat functional gastrointestinal disorders. However, there is no consensus on which foods should be included in the FODMAP list as FODMAP profile characterization is lacking for many different foods. This study aimed to emphasize the need for a unified FODMAP list to prevent patient confusion. We hypothesized that FODMAP lists do not include all products that may contain high levels of FODMAPs. PubMed, ScienceDirect, Scielo, and Cochrane were searched to identify food composition tables, reviews, food analysis publications, laboratory analyses, and clinical trials containing FODMAP lists. of 1,308 articles identified, 10 were selected; 22.6 % of the 204 foods listed were classified differently among studies. This included almonds, avocados, banana, broccoli, soft cheese, eggplant, and walnuts. Nutritional guidance may be taken from existing FODMAP-related literature, but the information given is not always consistent. Unvarying lists of low FODMAP foods should be compiled to provide patients with accurate information on FODMAP dieting.

The role of the gut microbiome in paediatric irritable bowel syndrome.

Irritable bowel syndrome (IBS) is a common and disabling condition in children. The pathophysiology of IBS is thought to be multifactorial but remains incompletely understood. There is growing evidence implicating the gut microbiome in IBS. Intestinal dysbiosis has been demonstrated in paediatric IBS cohorts; however, no uniform or consistent pattern has been identified. The exact mechanisms by which this dysbiosis contributes to IBS symptoms remain unknown. Available evidence suggests the imbalance produces a functional dysbiosis, with altered production of gases and metabolites that interact with the intestinal wall to cause symptoms, and enrichment or depletion of certain metabolic pathways. Additional hypothesised mechanisms include increased intestinal permeability, visceral hypersensitivity and altered gastrointestinal motility; however, these remain speculative in paediatric patients, with studies limited to animal models and adult populations. Interaction between dietary components and intestinal microbiota, particularly with fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs), has drawn increasing attention. FODMAPs have been found to trigger and worsen IBS symptoms. This is thought to be related to products of their fermentation by a dysbiotic microbial population, although this remains to be proven. A low-FODMAP diet has shown promising success in ameliorating symptoms in some but not all patients. There remains much to be discovered about the role of the dysbiotic microbiome in paediatric IBS.

Effects of a Low-Fermentable Oligosaccharides, Disaccharides, Monosaccharides, and Polyol Diet on Symptoms of Functional Abdominal Pain in Pediatric Patients.

Recently, great interest has been focused on dietary fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) for the treatment of functional abdominal pain (FAP). Several meta-analyses, including those on the adult population, have been published, potentiating its role. However, pediatric studies are scarce. We aimed to evaluate the effect of a low-FODMAP diet on the severity of FAP in children. This clinical trial included 50 patients aged 3-18 years with irritable bowel syndrome and FAP that were not otherwise specified. The patients were instructed to receive a low FODMAP diet guided by a dietitian. The primary outcome was the percentage of responders after 2 months of dietary intervention compared with baseline. Other outcomes included changes in stool consistency and quality of life (QoL) scores using the KIDSCREEN-10 questionnaire, and weight-for-age z-scores. After the dietary intervention, 74% of patients showed more than 30% lower pain intensity, as examined using the Wong-Baker Faces pain rating scale. Their QoL significantly improved, and patients have gained weight. A low FODMAP diet can improve pain intensity and QoL among children with functional abdominal pain, with no detrimental effects on body weight.

"Let Food be Thy Medicine": Diet and Supplements in Irritable Bowel Syndrome

The purpose of this review is to introduce options of dietary therapies and supplements as treatments for the treatment of Irritable bowel syndrome (IBS). IBS is a common condition with heterogeneity in pathogenesis and clinical presentation. Current treatment options are targeted at symptom relief with medications. Dietary therapy for IBS has been poorly studied in the past, however newer evidence suggests the use of certain diets, such as the low FODMAP (Fermentable Oligosaccharides, Disaccharides, Monosaccharides and Polyols) diet, as an intervention in patients with IBS for symptom improvement.

Supplementing Dietary Fibers With a Low FODMAP Diet in Irritable Bowel Syndrome: A Randomized Controlled Crossover Trial

Institution of a diet low in fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs) in patients with irritable bowel syndrome (IBS) may lead to inadequate fiber intake. This trial aimed to investigate the effects of supplementing specific fibers concomitantly with a low FODMAP diet on relevant clinical and physiological indices in symptomatic patients with IBS. A double-blind crossover trial was conducted in which 26 patients with IBS were randomly assigned to 1 of 3 low FODMAP diets differing only in total fiber content: control, 23 g/d; sugarcane bagasse, 33 g/d; or fiber combination (sugarcane bagasse with resistant starch), 45 g/d. Each diet lasted 14 days with most food provided and ≥21 days' washout between. Endpoints were assessed during baseline and dietary interventions. From a median IBS Severity Scoring System total score at baseline of 305, all diets reduced median scores by >50 with no differences in rates of symptom response between the diets: control (57%), sugarcane bagasse (67%), fiber combination (48%) (P= .459). Stool output was ∼50% higher during the fiber-supplemented vs control diets (P < .001 for both). While there were no overall differences overall in stool characteristics, descriptors, and water content, or in gastrointestinal transit times, supplementation with sugarcane bagasse normalized both low stool water content and slow colonic transit from during the control diet. Concomitant supplementation of fibers during initiation of a low FODMAP diet did not alter symptomatic response in patients with IBS but augmented stool bulk and normalized low stool water content and slow transit. Resistant starch did not exert additional symptomatic benefits over sugarcane bagasse alone. (Australia and New Zealand Clinical Trial Registry; Number, ACTRN12619000691145).

The low-FODMAP diet as an effective tool for managing irritable bowel syndrome - an assessment of adult patients' knowledge of dietary guidelines.

Irritable bowel syndrome (IBS) is the most common gastrointestinal disorder that is driven by the gutbrain axis and affects 1-20% of the population. Most patients note that various foods elicit abdominal symptoms, and they eliminate these products from their diets. A diet that is low in fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) is currently one of the mainstays in IBS treatment. The aim of this study was to assess the knowledge of IBS patients about the disease, treatment and the principles of the low-FODMAP diet that can alleviate gastrointestinal symptoms. The participants were adults diagnosed with IBS, the inclusion criteria were: absence of comorbidities requiring an elimination diet, age over 18 years, and consent to participate in the study. The respondents filled out an anonymous questionnaire containing questions about the IBS diagnosis, disease history and treatment, as well as 45 questions assessing the participants' knowledge about the low-FODMAP diet. In 28% of the cases, IBS was diagnosed by a general practitioner; in nearly 40% of the cases - by a gastroenterology specialist; in 10% of the cases - by a dietitian, whereas the remaining respondents had arrived at the diagnosis independently or with the help of support groups for IBS patients. After diagnosis, only every fourth respondent sought treatment in a gastroenterology clinic. In the studied population, 237 of the respondents had followed to the low-FODMAP diet, and the differentiating factors were sex (p=0.002), place of residence (city with a population higher than 100,000 vs. rural area; p=0.0001) and education (university vs. vocational school p=0.0043). Respondents who had been recently diagnosed with IBS (less than 12 months vs. more than 12 months before the study) were more likely to follow the FODMAP diet. The surveyed population was characterized by high levels of knowledge about the low-FODMAP diet, but many respondents did not strictly comply with dietary guidelines, in particular the duration of each dietary phase. Age was significantly correlated with the respondents' knowledge, and the participants' familiarity with low-FODMAP guidelines decreased with age. Nutritional consultations did not significantly improve the respondents' knowledge about the low-FODMAP diet.

Long-Term Effects of a Web-Based Low-FODMAP Diet Versus Probiotic Treatment for Irritable Bowel Syndrome, Including Shotgun Analyses of Microbiota: Randomized, Double-Crossover Clinical Trial.

BackgroundThe long-term management of irritable bowel syndrome (IBS) poses many challenges. In short-term studies, eHealth interventions have been demonstrated to be safe and practical for at-home monitoring of the effects of probiotic treatments and a diet low in fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs). IBS has been linked to alterations in the microbiota.ObjectiveThe aim of this study was to determine whether a web-based low-FODMAP diet (LFD) intervention and probiotic treatment were equally good at reducing IBS symptoms, and whether the response to treatments could be explained by patients’ microbiota.MethodsAdult IBS patients were enrolled in an open-label, randomized crossover trial (for nonresponders) with 1 year of follow-up using the web application IBS Constant Care (IBS CC). Patients were recruited from the outpatient clinic at the Department of Gastroenterology, North Zealand University Hospital, Denmark. Patients received either VSL#3 for 4 weeks (2 × 450 billion colony-forming units per day) or were placed on an LFD for 4 weeks. Patients responding to the LFD were reintroduced to foods high in FODMAPs, and probiotic responders received treatments whenever they experienced a flare-up of symptoms. Treatment response and symptom flare-ups were defined as a reduction or increase, respectively, of at least 50 points on the IBS Severity Scoring System (IBS-SSS). Web-based ward rounds were performed daily by the study investigator. Fecal microbiota were analyzed by shotgun metagenomic sequencing (at least 10 million 2 × 100 bp paired-end sequencing reads per sample).ResultsA total of 34 IBS patients without comorbidities and 6 healthy controls were enrolled in the study. Taken from participating subjects, 180 fecal samples were analyzed for their microbiota composition. Out of 21 IBS patients, 12 (57%) responded to the LFD and 8 (38%) completed the reintroduction of FODMAPs. Out of 21 patients, 13 (62%) responded to their first treatment of VSL#3 and 7 (33%) responded to multiple VSL#3 treatments. A median of 3 (IQR 2.25-3.75) probiotic treatments were needed for sustained symptom control. LFD responders were reintroduced to a median of 14.50 (IQR 7.25-21.75) high-FODMAP items. No significant difference in the median reduction of IBS-SSS for LFD versus probiotic responders was observed, where for LFD it was –126.50 (IQR –196.75 to –76.75) and for VSL#3 it was –130.00 (IQR –211.00 to –70.50; P>.99). Responses to either of the two treatments were not able to be predicted using patients’ microbiota.ConclusionsThe web-based LFD intervention and probiotic treatment were equally efficacious in managing IBS symptoms. The response to treatments could not be explained by the composition of the microbiota. The IBS CC web application was shown to be practical, safe, and useful for clinical decision making in the long-term management of IBS. Although this study was underpowered, findings from this study warrant further research in a larger sample of patients with IBS to confirm these long-term outcomes.Trial RegistrationClinicalTrials.gov NCT03586622; https://clinicaltrials.gov/ct2/show/NCT03586622

High FODMAP diet causes barrier loss via lipopolysaccharide-mediated mast cell activation.

Fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) are carbohydrates thought to contribute to the symptoms of IBS. A diet in high in FODMAPs (HFM) induces gastrointestinal symptoms in patients with irritable bowel syndrome (IBS), and a diet low in FODMAPs (LFM) improves symptoms in up to 60% of patients with IBS. However, the mechanism by which FODMAPs affect IBS symptoms is unclear. We showed that mice fed on a HFM diet have mast cell activation and colonic barrier loss. Using mast cell–deficient mice with and without mast cell reconstitution, we showed that HFM-mediated colonic barrier loss is dependent on TLR4-dependent mast cell activation. In in vitro studies, we demonstrated that IBS fecal supernatant stimulates mast cells significantly more compared with fecal supernatant from healthy controls. This effect of IBS fecal supernatant on mast cell stimulation is ameliorated in the absence of the TLR4 receptor and after a LFM diet. We found that a LFM diet improves colonic barrier function and reduces mast cell activation while decreasing fecal LPS levels. Our findings indicate that a HFM diet causes mast cell activation via LPS, which in turn leads to colonic barrier loss, and a LFM diet reverses these pathophysiologic mucosal changes.

Two microbiota subtypes identified in irritable bowel syndrome with distinct responses to the low FODMAP diet

ObjectiveReducing FODMAPs (fermentable oligosaccharides, disaccharides, monosaccharides and polyols) can be clinically beneficial in IBS but the mechanism is incompletely understood. We aimed to detect microbial signatures that might predict response...

World Gastroenterology Organisation Global Guidelines: Diet and the Gut.

World Gastroenterology Organisation Global Guidelines: Diet and the Gut.

Group education on the low FODMAP diet improves gastrointestinal symptoms but neither anxiety or depression in irritable bowel syndrome.

The low fermentable oligosaccharides, disaccharides, monosaccharides and polyols (FODMAP) diet is an effective dietitian-led treatment for irritable bowel syndrome (IBS). An increasing demand of IBS patient referrals has warranted group FODMAP education led by specialist dietitians. Psychological co-morbidities are common in IBS, although how the low FODMAP diet influences psychological outcomes is not understood. The present study aimed to evaluate symptom related outcomes of the diet following group education and assess its effect on psychological profiles. An observational, prospective study was conducted in 55 IBS patients who attended FODMAP Restriction and FODMAP Reintroduction group sessions. Data were collected at baseline and follow-up after FODMAP Restriction and analysed using descriptive and McNemar's tests. Primary outcome was evaluated by IBS Symptom Severity Score (IBS-SSS). Secondary psychological outcomes included anxiety and depression using the Hospital Anxiety and Depression Scale (HADS) and risk of eating disorder questionnaire (SCOFF). After FODMAP Restriction, 27 of 55 (54%) patients reported clinically relevant symptom improvement, as defined by a reduction in the IBS-SSS ≥50points, whereas no differences were recorded in the proportion of patients identified with clinical anxiety (p = 1.000) or clinical depression (p = 0.375). Positively, no increased risk of an eating disorder was observed. The present study provides data supporting the efficacy of the low FODMAP diet in IBS patients who attended dietitian led group education settings in tertiary care. Clinically significant improvements in gastrointestinal symptoms were observed, although with no impact on clinical levels of anxiety, depression or the risk of an eating disorder.

Investigating the Role of Low-FODMAP Diet in Improving Gastrointestinal Symptoms in Irritable Bowel Syndrome

Background A low–fermentable oligosaccharide, disaccharide, monosaccharide, and polyol (FODMAP) diet (LFD) appeared to improve gastrointestinal symptoms in patients with Irritable Bowel Syndrome (IBS). However, evidence of its efficacy in Asia remains scarce. Objectives This study aims to investigate the clinical effectiveness of LFD intervention among Asian IBS patients and barriers to its adherence. Methods Patients with IBS who were instructed to follow LFD by dietitians at a tertiary hospital in Singapore between July 2013 and December 2014 were retrospectively reviewed. Severity scores of 19 gastrointestinal symptoms were recorded using an 11-point rating scale (0 = “no symptoms,” 10 = “extremely severe”) pre- and post-LFD intervention. Adherence to LFD was assessed based on patients’ diet history and a high-FODMAP food checklist. Results Eighty-two patients with a median follow-up of 5.8 weeks were investigated. The LFD adherence rate was 61.0% ( n = 50). Overall, statistically significant improvement was observed in 14 of 19 gastrointestinal symptoms (median difference = −2.0 to −0.5, p &lt; .05). The proportion of patients who had improvement in 10 individual symptoms (defined as ≥1 point reduction in symptom severity rating) was significantly higher in LFD-adherent patients (67.5%–82.4%) than that of the non-adherent group (27.8%–55.0%). Reasons reported for non-adherence included “limited availability of low-FODMAP alternatives” ( n = 9), “limited understanding of LFD” ( n = 7), and “perceived lack of benefit” ( n = 4). Conclusions LFD intervention improved gastrointestinal symptoms in a cohort of Asian IBS patients. Limited access to low-FODMAP alternatives was the main barrier to adherence.

Low fermentable oligosaccharides, disaccharides, monosaccharides, and polyols diet versus traditional dietary advice for functional dyspepsia: a randomized controlled trial.

Prospective trials evaluating efficacy of specific diet restriction in functional dyspepsia (FD) are scarce. We aimed to assess efficacy of low fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAP) diet in FD, compared with traditional dietary advice (TDA). In this prospective, single-blind trial, patients with FD (Rome IV) were randomized into low FODMAP diet (LFD) and TDA groups, for 4weeks (phase I). In phase II (4-12weeks), LFD group was advised systematic re-introduction of FODMAPs. Symptom severity and quality of life were assessed using "Short-Form Nepean Dyspepsia Index (SF-NDI)." Primary outcome was symptomatic response (symptom score reduction of ≥50%), at 4weeks. Study was registered with CTRI (2019/06/019852). Of 184 patients screened, 105 were randomized to LFD (n=54) and TDA (n=51) groups. At 4weeks, both groups showed significant reduction in SF-NDI symptom scores compared with baseline, with no significant difference in inter-group response rates [LFD: 66.7% (36/54); TDA: 56.9% (29/51); P=0.32]. On sub-group analysis, patients with postprandial distress syndrome or bloating had significantly better symptomatic response with LFD (P=0.04). SF-NDI quality of life scores improved significantly in both groups. On multivariate analysis, factors predicting response to LFD were bloating and male gender. Incidences of adverse events (minor) were similar in both groups. In patients with FD, LFD and TDA lead to significant symptomatic and quality of life improvement. Patients with postprandial distress syndrome or bloating respond significantly better to LFD. Therefore, dietary advice for FD should be individualized according to FD subtype.

SEVERITY OF IRRITABLE BOWEL SYNDROME SYMPTOMS AND FODMAPS INTAKE IN UNIVERSITY STUDENTS.

Irritable bowel syndrome (IBS) symptoms such as diarrhea, bloating and abdominal pain can reduce University student's productivity and learning ability. One of the possible treatments for IBS is the temporarily exclusion of foods that have a high content of short-chain fermentable carbohydrates, the fermentable, oligosaccharides, disaccharides, monosaccharides and polyols (FODMAPs). This study aimed to assess University student's intake of foods that are rich in FODMAPs, looking for possible associations with the severity of IBS symptoms. A cross-sectional study was carried out, with undergraduate students from a private University in the city of São Paulo, Brazil, aged between 19 and 46 years old and that were enrolled in different courses and stages. Students were invited to participate and those who gave their formal consent were included in this research. A sociodemographic and lifestyle questionnaire was applied, in addition to the Gastrointestinal Symptom Rating Scale - GSRS. Students also responded a short Food Frequency Questionnaire, developed to investigate habitual FODMAPs intake of Brazilian adult population. Spearman's correlation analysis between the student's GSRS scores and the frequency of foods rich in FODMAPs intake were performed in SPSS v.21. Fifty-six students were interviewed, with mean age of 21.4 years old (SD=4.41), with a predominance of women (76.8%). The GSRS results showed that 58.9% of students felt minimal to moderate abdominal discomfort and 14.3% had moderately severe to very severe abdominal pain during the prior week to the interview. Besides abdominal pain, the gastrointestinal symptoms that were most reported by students were flatulence (98.2%), stomach rumbling (89.3%) and eructations (85.7%). Greater symptom severity was observed in women (P=0.004) and sedentary students (P=0.003). Regarding FODMAPs consumption, honey (P=0.04), chocolate (P=0.03) and milk table cream (P=0.001) intakes were positively correlated with the greater severity of symptoms. Although clinical diagnosis is necessary to establish IBS, 73.2% of the students presented minimal to very severe abdominal pain during the prior week. Female had sedentary students had greater severity of gastrointestinal symptoms. A low FODMAP diet, well oriented, could bring some symptoms relief to these University students.