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Blueberries Improve Abdominal Symptoms, Well-Being and Functioning in Patients with Functional Gastrointestinal Disorders.
Wilder-Smith, CH, Materna, A, Olesen, SS
Nutrients. 2023;15(10)
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Functional gastrointestinal disorders (FGID) are the most common cause of recurring, chronic digestive upsets. Irritable bowel syndrome (IBS) and functional dyspepsia (FD), or persistent indigestion, are the most prevalent types of those disorders. Typical symptoms include pain or discomfort in the abdomen, changes in stool patterns or bloating and may also manifest in symptoms not directly relating to the digestive tract. It remains uncertain what the exact mechanisms of those disorders are. However, scientists identified various factors involved, including immune system activation, sensitisation of the nervous system, dysregulated permeability of the gut walls, and changes in the microbiota, their composition and metabolic activity. Polyphenols are natural compounds found abundantly in plants and are most known for their antioxidant qualities. One frequently studied and rich-source of phenols is Blueberries (Vaccinium spp). Blueberries have antioxidant, anti-inflammatory, and neuroprotective properties, and are known to reverse the permeability of the gut membrane. Hence their use in the management of FGID appeared promising. This double-blind, randomized, cross-over study assessed the benefit of blueberries in 43 people with IBS or FD, between 18–60 years of age. The candidates were given 30g freeze-dried blueberries, the equivalent of 180g of fresh blueberries, or a sugar-based placebo of similar calorific value for 6-weeks each. When receiving the blueberries, greater symptom relief was observed when compared to the placebo group. Blueberry intake also positively reflected in experienced improvement in quality of life. No notable differences were observed between groups in stool patterns and fructose digestion. Blueberries and their beneficial compounds such as polyphenols and fiber appear to have a wide range of benefits that can help manage some of the FGID-associated symptoms. Further studies are needed to understand why, despite some notable benefits, some of the other GI markers remained unaffected. As blueberries are generally well tolerated, they can be a simple and helpful food intervention to complement other FGID management strategies.
Abstract
Blueberries beneficially modulate physiologic mechanisms relevant to the pathogenesis of functional gastrointestinal disorders (FGID). Forty-three patients with FGID received freeze-dried blueberries (equivalent to 180 g fresh blueberries) or sugar and energy-matched placebo in a double-blind, randomized, cross-over study. After 6 weeks of treatment, the differences in Gastrointestinal Clinical Rating Scale (GSRS) scores and abdominal symptom relief were compared as primary outcome measures. The quality of life and life functioning ratings (OQ45.2 questionnaire), Bristol stool scales, and fructose breath test results constituted secondary outcome measures. Blueberry treatment resulted in more patients with relevant abdominal symptom relief compared to placebo (53% vs. 30%, p = 0.03). Total and pain GSRS scores improved insignificantly (mean treatment differences [95% CI]: -3.4 [-7.4 to 0.6] (p = 0.09) and -1.0 [-2.2 to 0.1] (p = 0.08), respectively). OQ45.2 scores improved during blueberry treatment compared to placebo (treatment difference -3.2 [95% CI: -5.6 to -0], p = 0.01). Treatment effect differences for the further measures did not reach statistical significance. Blueberries relieved abdominal symptoms and improved general markers of well-being, quality of life, and life functioning more than placebo in patients with FGID. Consequently, the polyphenol and fiber components of blueberries exert broad beneficial effects separate from the sugars present in both treatments.
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A Low-FODMAP Diet Provides Benefits for Functional Gastrointestinal Symptoms but Not for Improving Stool Consistency and Mucosal Inflammation in IBD: A Systematic Review and Meta-Analysis.
Peng, Z, Yi, J, Liu, X
Nutrients. 2022;14(10)
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The low-FODMAP diet eliminates carbohydrates that cannot be easily digested in order to reduce functional gastrointestinal symptoms associated with irritable bowel disease (IBD). The symptoms of irritable bowel disease include abdominal pain and bloating. This systematic review and meta-analysis aimed to evaluate whether a low-FODMAP diet can alleviate functional gastrointestinal symptoms in individuals with inflammatory bowel disease. In comparison with a regular diet, a low-FODMAP diet significantly reduced symptoms of bloating, wind, flatulence, abdominal pain, fatigue, and lethargy in patients with IBD. In addition, patients with Crohn's disease have achieved remission or reduced symptoms after following a low-FODMAP diet. Healthcare professionals can use this study to understand better the effects of a low-FODMAP diet on patients with IBD who have functional gastrointestinal symptoms. Further robust studies are, however, required to evaluate the evidence's robustness and identify the mechanism behind the improvement of symptoms.
Expert Review
Conflicts of interest:
None
Take Home Message:
- LFD use in IBD improved symptoms of bloating, wind or flatulence, borborygmi, abdominal pain, and fatigue or lethargy, but not nausea and vomiting.
Evidence Category:
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A: Meta-analyses, position-stands, randomized-controlled trials (RCTs)
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B: Systematic reviews including RCTs of limited number
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C: Non-randomized trials, observational studies, narrative reviews
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D: Case-reports, evidence-based clinical findings
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E: Opinion piece, other
Summary Review:
Introduction
This meta-analysis assesses the efficacy of a low fermentable oligosaccharides, disaccharides, monosaccharides, and polyols diet (LFD) in inflammatory bowel disease [IBD: ulcerative colitis (UC) and Crohn’s disease (UC)] participants with functional gastrointestinal symptoms (FGSs).
Methods
A search was performed on PubMed, Web of Science, EMBASE, Cochrane Central Register of Controlled Trials, Chinese National Knowledge Infrastructure (CNKI), WanFang (Chinese) Database up to March 2022. Quality assessment of all included studies was performed.
Results
9 studies (4 randomised controlled trials, 5 non-randomised studies) with a total of 351 participants diagnosed with IBD were included, and compared LFD with a placebo diet or normal diet (ND), overall and individual
LFD Effects of FGS:
- Overall 9 studies: an improvement (0.47, 0.33–0.66, p = 0.0000)
- No difference in the subgroup classified by disease type
- CD and UC: no improvement
Individual improvement:
- Bloating (0.37, 0,24-0,57, p=0.0000); wind or flatulence (0.38, 0,28-0,51, p=0.0000); borborygmi (0.48, 0,26-0,89, p=0.0000), abdominal pain (0.5, 0,37-0,68, p=0.0000), fatigue/lethargy (0.71, 0,61-0,82, p=0.0000)
- No difference in nausea and vomiting (0.54, 0,22-1,32, p=018)
IBS Quality of Life Score:
- 2 studies: reduced Short IBD Questionnaire (SIBDQ) score (11.24, 6.61-15.87, p=0.0000)
Bristol Stool Form Chart:
- 2 studies: normal stool consistency (type 3-4); no difference (5.99, 0.17-216.51, p=0.33)
- 2 other studies: no difference (-0.17, 0.48 - 0.15, p=0.30)
Diseases activity (Harvey-Bradshaw index):
- 2 studies using the Mayo score: no difference (-32, -1,09-0.45, p=0.41)
- 3 studies using BHi score: reduction (-1.09, -1,77-0.42, p=0.002)
Faecal calprotectin:
- 2 studies: no change (-16.03, -36,78-4.73, p=0.13)
Limitations
- Comparison diets were not standardised, suggesting the potential of different dietary habits to bias results..
- Heterogeneity of included studies, and the relatively small sample size of the studies can reduce the reliability of the results.
Conclusion
While the study found inconsistent definition standards for FGS, all the nine studies showed that LFD was associated with an improvement in some symptoms.
Clinical practice applications:
- This study suggests that IBD patients with FGSs may benefit from LFD treatment with the assistance of a healthcare professional.
Considerations for future research:
- This study has shown that LFD can improve FGSs in IBD, but further research with a larger sample size and more comprehensive analysis is warranted to replicate the results.
- The description of the findings and Quality of Life data are a little unclear. The impact on Quality of Life warrants further investigation, as clinicians need to consider the impact of following a restrictive diet on Quality of Life.
Abstract
BACKGROUND A low fermentable oligosaccharides, disaccharides, monosaccharides, and polyols diet (LFD) is claimed to improve functional gastrointestinal symptoms (FGSs). However, the role of LFD in inflammatory bowel disease (IBD) patients with FGSs remains unclear. OBJECTIVE To systematically assess the efficacy of LFD in IBD patients with FGSs. METHODS Six databases were searched from inception to 1 January 2022. Data were synthesized as the relative risk of symptoms improvement and normal stool consistency, mean difference of Bristol Stool Form Scale (BSFS), Short IBD Questionnaire (SIBDQ), IBS Quality of Life (IBS-QoL), Harvey-Bradshaw index (HBi), Mayo score, and fecal calprotectin (FC). Risk of bias was assessed based on study types. A funnel plot and Egger's test were used to analyze publication bias. RESULTS This review screened and included nine eligible studies, including four randomized controlled trials (RCTs) and five before-after studies, involving a total of 446 participants (351 patients with LFD vs. 95 controls). LFD alleviated overall FGSs (RR: 0.47, 95% CI: 0.33-0.66, p = 0.0000) and obtained higher SIBDQ scores (MD = 11.24, 95% CI 6.61 to 15.87, p = 0.0000) and lower HBi score of Crohn's disease (MD = -1.09, 95% CI -1.77 to -0.42, p = 0.002). However, there were no statistically significant differences in normal stool consistency, BSFS, IBS-QoL, Mayo score of ulcerative colitis, and FC. No publication bias was found. CONCLUSIONS LFD provides a benefit in FGSs and QoL but not for improving stool consistency and mucosal inflammation in IBD patients. Further well-designed RCTs are needed to develop the optimal LFD strategy for IBD.
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An exercise-based educational and motivational intervention after surgery can improve behaviors, physical fitness and quality of life in bariatric patients.
Gallé, F, Marte, G, Cirella, A, Di Dio, M, Miele, A, Ricchiuti, R, Liguori, F, Maida, P, Liguori, G
PloS one. 2020;15(10):e0241336
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Bariatric surgery is currently the most effective method of weight loss for individuals with obesity. However sustained weight loss after surgery can be hindered by unhealthy behaviours that have sustained since before the procedure. Motivational, educational, diet and exercise programmes have been shown to help sustain weight loss following surgery. This non-randomised control trial over 12 months, aimed to assess the effects of a motivational, educational diet and exercise programme on fitness and quality of life in 82 individuals following bariatric surgery. The results showed that a diet and exercise programme improved quality of life and fitness. There was an increased daily intake of fruits and vegetables, eating behaviours were improved and there was a greater weight loss in those following the programme. It was concluded that the diet and exercise programme was responsible for behavioural changes that ensured better quality of life and sustained weight loss following surgery. Health care professionals could use this study to understand the need to recommend motivational and educationally based diet and exercise programme to patients following bariatric surgery.
Abstract
INTRODUCTION Unhealthy lifestyles may hinder bariatric surgery outcomes. This non-randomized controlled study aimed to evaluate the effects of an integrated post-operative exercise-based educational and motivational program in improving behaviors, quality of life, anthropometric features, cardiorespiratory and physical fitness in bariatric patients respect to the only surgical intervention. METHODS A group of adult sedentary bariatric patients chose to attend a 12-month exercise program integrated with diet education and motivational support, or to receive usual care. Dietary habits, binge eating disorder, physical activity, obesity-related quality of life, Body Mass Index, waist and hip circumference, VO2max, strength and flexibility were assessed at the start and at the end of the study in both groups. RESULTS On a total of 82 patients enrolled, follow-up measures were obtained from 28 (85.7% females, mean age 38.2±8.7) and 42 (71.4% females, mean age 40.2±9.5) patients included in the intervention and control group, respectively. All the behavioral and physical outcomes improved significantly in the participants to the intervention, while the control group showed lesser changes, especially regarding quality of life and physical fitness. CONCLUSIONS Notwithstanding the self-selection, these results suggest that a timely postoperative behavioral multidisciplinary program for bariatric patients may be effective in establishing healthy behaviors which can lead to better surgery outcomes.
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The Effect of Nutrition Intervention with Oral Nutritional Supplements on Pancreatic and Bile Duct Cancer Patients Undergoing Chemotherapy.
Kim, SH, Lee, SM, Jeung, HC, Lee, IJ, Park, JS, Song, M, Lee, DK, Lee, SM
Nutrients. 2019;11(5)
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Despite the advantages of chemotherapy, it can cause cancer-related malnutrition leading to both reduced quality of life and reduced survival rate. Oral nutritional supplements (ONSs) provide balanced nutrients, calories, and protein to complement insufficient oral intake, and ONS provision during treatment may improve nutritional status. The aim of this study was to investigate the impact of ONS on nutritional status in patients undergoing chemotherapy for pancreatic and bile duct cancer. Patients were randomly allocated to the ONS group (15) and non-ONS group (19) and dietary intake and body weight were assessed at weeks 1, 2, 4 and 8. Body composition and quality of life was assessed at baseline and week 8. This study found the supply of ONS helped promote health by increasing body fat mass, improving quality of life and decreasing fatigue symptoms in pancreatic and bile duct cancer patients. These results were more pronounced in patients in the first cycle of chemotherapy. Based on these results, the authors conclude ONS may improve nutritional status by increasing fat mass and/or maintaining the body composition of patients undergoing chemotherapy.
Abstract
Chemotherapy may negatively affect nutritional status and quality of life (QOL) in pancreatic cancer patients. Our aim was to investigate the beneficial effects of oral nutrition supplements (ONS) on pancreatic and bile duct cancer patients undergoing chemotherapy. Among patients with progressive pancreatic and bile duct cancer receiving chemotherapy, the ONS group (n = 15) received two packs of ONS daily for 8 weeks while the non-ONS group (n = 19) did not. Anthropometric measures, dietary intake, nutritional status, and quality of life were assessed. ONS significantly increased daily intakes of energy, carbohydrates, proteins, and lipids at 8 weeks compared to the baseline. After 8 weeks, fat mass significantly increased in the ONS group. For patients in their first cycle of chemotherapy, body weight, fat-free mass, skeletal muscle mass, body cell mass, and fat mass increased in the ONS group but decreased in the non-ONS group. Fat mass increased in second or higher cycle only in the ONS group. Patient-generated subjective global assessments (PG-SGA) and fatigue scores in the Quality of Life Questionnaire Core 30 (QLQ-C30) improved in the ONS group. ONS might improve nutritional status by increasing fat mass and/or maintaining the body composition of pancreatic and bile duct cancer patients with chemotherapy, especially those in the first cycle, and alleviate fatigue symptoms.
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Effects of Euglena gracilis EOD-1 Ingestion on Salivary IgA Reactivity and Health-Related Quality of Life in Humans.
Ishibashi, KI, Nishioka, M, Onaka, N, Takahashi, M, Yamanaka, D, Adachi, Y, Ohno, N
Nutrients. 2019;11(5)
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Euglena gracilis is a single cell algae which inhabits most garden ponds. Euglena is rich in several nutrients and produces paramylon, a type of carbohydrate known as β-glucan, which has been shown in animal studies to have several health benefits. This study looked at the effects of E. gracilis on the immune system and quality of life (QOL) in humans. Seven healthy men aged 30-70 completed the study. Subjects were split into two groups and instructed to take 500mg/day of either the E. gracilis or a placebo (cornstarch) for 4 weeks. After a break, the groups were swapped, and the experiment repeated for another 4 weeks. The researchers found that ingestion of the algae increased the amount of salivary s-IgA secretion, and was able to activate the mucosal immune system in such a way that could potentially enhance the immune response against microbial infections such as Candida and Aspergillus. Ingestion of the algae also improved scores in both mental and physical health. Due to the limited number and diversity of subjects, further studies with a larger number of more diverse subjects are needed. The researchers suggest that Euglena gracilis would be a useful functional food for humans.
Abstract
Euglena gracilis EOD-1, a microalgal strain known for high yields of the β-1, 3-glucan paramylon, is suggested to function as a dietary fiber and enhance immunity. Here, we aimed to investigate the effects of E. gracilis EOD-1 biomass (EOD1BM) ingestion on immunoglobulin A (IgA) antibody titers in saliva, its reactivity, and the health-related quality of life (QOL) in humans. Reacting human immunoglobulin preparations and saliva with paramylon granules revealed the presence of anti-paramylon antibodies in the blood and saliva. We conducted a placebo-controlled, double-blind, crossover study involving 13 healthy subjects who ingested the placebo or EOD1BM for 4 weeks. Saliva was collected from each subject before and after ingestion, and IgA titers and E. gracilis EOD-1 paramylon (EOD1PM) reactivity were compared. In the EOD1BM Ingestion group, the anti-EOD1PM IgA content and titer increased after EOD1BM ingestion. No such change was observed in the Placebo group. Furthermore, the health-related QOL, especially mental health, increased in the EOD1BM Ingestion group. Thus, EOD1BM ingestion led to the production of paramylon (PM)-specific IgA antibody and increased salivary IgA antibody titers. We demonstrate that EOD1BM ingestion enhanced the immunity in the mucosal surface, evoked an antigen-specific response, and increased the health-related QOL, thereby contributing to health improvement.
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Food Exclusion Based on IgG Antibodies Alleviates Symptoms in Ulcerative Colitis: A Prospective Study.
Jian, L, Anqi, H, Gang, L, Litian, W, Yanyan, X, Mengdi, W, Tong, L
Inflammatory bowel diseases. 2018;24(9):1918-1925
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Ulcerative Colitis (UC) is a chronic debilitating inflammatory bowel disease that may need lifetime management. Dietary management of UC by eliminating food antigens that may be causing a delayed immune response is one of the approaches used widely to manage the disease. Food intolerance, mediated by immunoglobulin G antibodies in response to food antigens that are otherwise harmless, could be one cause of UC. Low levels of digestive enzymes may result in poor digestion of glucose, amino acids, and glycerol, followed by an immune reaction that leads to food sensitivities. Ninety-seven UC patients were enrolled in this open-label, stratified, prospective, randomised controlled trial to evaluate the effect of an elimination diet versus a sham diet (a normal healthy diet). Following an IgG-specific exclusion diet for six months resulted in the alleviation of UC symptoms and an improvement in health-related quality of life. Further studies are needed to confirm the effectiveness of the exclusion diet since the intervention group did not show a significant reduction in IgG antibody levels. These results can be used by healthcare professionals to understand the potential role of exclusion diets in the management of UC.
Abstract
BACKGROUND Most patients with ulcerative colitis (UC) rely predominantly on medication for disease control. Diet interventions can reduce pharmaceutical expenditures and prolong remission. We designed a prospective study to evaluate whether an immunoglobulin G (IgG)-guided exclusion diet would improve symptoms and quality of life (QoL) in patients with UC. METHODS The 6-month diet intervention included 97 patients with UC, who were randomly divided into an intervention group (n = 49) and a control (n = 48) group. Individual diet plans were created for the intervention group according to IgG titers; the control group ate a healthy diet as normal. Observational indices included disease activity, extraintestinal manifestations, nutritional status, and QoL. Relationships between food-specific IgG antibodies and these indices were also analyzed. RESULTS At baseline, there were no significant differences between the groups. Food-specific IgG antibodies were detected in 70.10% of participants. After intervention, the Mayo score was significantly lower in the intervention group than in the control group (2.41 ± 0.89 vs 3.52 ± 1.15, P < 0.05). The number of patients with extraintestinal manifestations decreased from 7 to 2 in the intervention group and from 6 to 5 in the control group. As for nutritive indices, the intervention group had higher mean body mass index and albumin than the control group (23.88 ± 3.31 vs 21.50 ± 6.24 kg/m2, respectively, P < 0.05; 48.05 ± 6.39 vs 45.72 ± 5.48 g/L, respectively, P < 0.05), whereas prealbumin and transferrin were not significantly different between the groups. QoL improved after food exclusion (P < 0.05). CONCLUSIONS An IgG-guided exclusion diet ameliorated UC symptoms and improved QoL. Interactions between IgG-based food intolerance and UC warrant further study.
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Systematic review: probiotics in the management of lower gastrointestinal symptoms - an updated evidence-based international consensus.
Hungin, APS, Mitchell, CR, Whorwell, P, Mulligan, C, Cole, O, Agréus, L, Fracasso, P, Lionis, C, Mendive, J, Philippart de Foy, JM, et al
Alimentary pharmacology & therapeutics. 2018;47(8):1054-1070
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The role of the gut microbiota in health and disease is far reaching and there is a growing body of evidence on the therapeutic potential of probiotics in gastrointestinal (GI) disease. Patients with GI disease present with a variety of symptoms and current evidence suggests probiotics may play a role in ameliorating these adverse symptoms. The purpose of this review is to update the previous systematic review and incorporate new findings on the role of probiotics in adult patients presenting with a variety of GI symptoms. Based on the updated evidence, this study confirms the finding that specific probiotics are beneficial for certain lower GI problems. According to this review, the author deems this study useful for clinicians when recommending probiotics to patients.
Abstract
BACKGROUND In 2013, a systematic review and Delphi consensus reported that specific probiotics can benefit adult patients with irritable bowel syndrome (IBS) and other gastrointestinal (GI) problems. AIM: To update the consensus with new evidence. METHODS A systematic review identified randomised, placebo-controlled trials published between January 2012 and June 2017. Evidence was graded, previously developed statements were reassessed by an 8-expert panel, and agreement was reached via Delphi consensus. RESULTS A total of 70 studies were included (IBS, 34; diarrhoea associated with antibiotics, 13; diarrhoea associated with Helicobacter pylori eradication therapy, 7; other conditions, 16). Of 15 studies that examined global IBS symptoms as a primary endpoint, 8 reported significant benefits of probiotics vs placebo. Consensus statements with 100% agreement and "high" evidence level indicated that specific probiotics help reduce overall symptom burden and abdominal pain in some patients with IBS and duration/intensity of diarrhoea in patients prescribed antibiotics or H. pylori eradication therapy, and have favourable safety. Statements with 70%-100% agreement and "moderate" evidence indicated that, in some patients with IBS, specific probiotics help reduce bloating/distension and improve bowel movement frequency/consistency. CONCLUSIONS This updated review indicates that specific probiotics are beneficial in certain lower GI problems, although many of the new publications did not report benefits of probiotics, possibly due to inclusion of new, less efficacious preparations. Specific probiotics can relieve lower GI symptoms in IBS, prevent diarrhoea associated with antibiotics and H. pylori eradication therapy, and show favourable safety. This study will help clinicians recommend/prescribe probiotics for specific symptoms.
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Clinical trial: B vitamins improve health in patients with coeliac disease living on a gluten-free diet.
Hallert, C, Svensson, M, Tholstrup, J, Hultberg, B
Alimentary pharmacology & therapeutics. 2009;29(8):811-6
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In many cases, adults diagnosed with coeliac disease (CD) that adhere to a long-term gluten-free diet (GFD) present with vitamin deficiency and lower levels of health-related quality of life. CD patients often do not meet the recommended daily intake levels of B vitamins as they are often consumed in fortified bread and cereals. The aim of this trial was to study the biochemical and clinical effects of 6-months of B vitamin supplementation in adults with longstanding CD. The trial included 57 participants aged 45-64 with evidence of remission from CD and on a gluten-free diet for at least 8 years. Patients were randomized to a daily dose of vitamin B complex and outcome measures were psychological wellbeing and homocysteine levels, a marker of B vitamin status. The findings of this study showed that in adult with longstanding coeliac disease, B vitamin supplementation resulted in normalized homocysteine levels and a significant improvement in general wellbeing. Based on this study, the authors’ suggest that B vitamins should be considered in people advised to follow a gluten-free diet.
Abstract
BACKGROUND Patients with coeliac disease living on a gluten-free diet show vitamin deficiency and reduced subjective health status. AIM: To study the biochemical and clinical effects of B vitamin supplementation in adults with longstanding coeliac disease. METHODS In a double blind placebo controlled multicentre trial, 65 coeliac patients (61% women) aged 45-64 years on a strict gluten-free diet for several years were randomized to a daily dose of 0.8 mg folic acid,0.5 mg cyanocobalamin and 3 mg pyridoxine or placebo for 6 months. The outcome measures were psychological general well-being (PGWB) and the plasma total homocysteine (tHcy) level, marker of B vitamin status. RESULTS Fifty-seven patients (88%) completed the trial. The tHcy level was baseline median 11.7 micromol/L (7.4-23.0), significantly higher than in matched population controls [10.2 micromol/L (6.7-22.6) (P < 0.01)]. Following vitamin supplementation, tHcy dropped a median of 34% (P < 0.001), accompanied by significant improvement in well-being (P < 0.01), notably Anxiety (P < 0.05) and Depressed Mood (P < 0.05) for patients with poor well-being. CONCLUSIONS Adults with longstanding coeliac disease taking extra B vitamins for 6 months showed normalized tHcy and significant improvement in general well-being, suggesting that B vitamins should be considered in people advised to follow a gluten-free diet.