- ICH GCP
- Registre américain des essais cliniques
- Essai clinique NCT03581812
Snack Foods and Their Impact on Gastrointestinal Microbiology, Function and Symptoms (OptiGut)
Snack Foods and Their Impact on Gastrointestinal Physiology, Luminal Microbiology and Gastrointestinal Symptoms
Aperçu de l'étude
Statut
Les conditions
Description détaillée
Diet is a crucial target for the improvement of human health. In the modern world, diets are diverse and diet related diseases are becoming more and more common. In particular, it is becoming increasingly apparent that the bacteria that live in the gut are strongly linked to both diet and health. Bacteria in the gut can be beneficial or harmful, and the health of the gut relies on the beneficial bacteria outnumbering the harmful ones. Diet has a great impact on the bacterial composition of the gut. In turn, the gut bacteria play diverse roles in human health, influencing not only the gut but also the health of the immune system, heart and brain. Therefore, optimising the composition of the gut bacterial is vital to human health and wellbeing.
It has been shown that snacks between meals contributes 420 - 480 calories per day, almost a quarter of the recommended intake. Therefore, snack choices are an area of diet and lifestyle that have the potential to influence diet and in turn the health of our gut and gut bacteria. We would like to assess the effect of replacing usual snacks with alternative snack foods that we believe have benefits for gut health.
The primary aim of the study is to investigate whether the replacement of usual snacks has an effect on gut bacterial composition, specifically the abundance of Bifidobacteria. Secondary aims include the effect of the intervention snacks on additional measures of gut health such as gut transit time, the frequency and consistency of bowel movements and gut symptoms e.g. heartburn, nausea, belching etc. The effect of snack foods on metabolites in the blood (e.g. glucose, insulin, lipids) will also be determined. Finally the impact of snack replacement on mood and quality of life will be assessed.
Type d'étude
Inscription (Réel)
Phase
- N'est pas applicable
Contacts et emplacements
Lieux d'étude
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London, Royaume-Uni, SE1 9NH
- King's College London Waterloo Campus
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Critères de participation
Critère d'éligibilité
Âges éligibles pour étudier
Accepte les volontaires sains
Sexes éligibles pour l'étude
La description
Inclusion Criteria:
- Male or female
- Aged between 18-45 years
- Body mass index (BMI) of 18.5 - 29.9 kg/m2
- Regular consumption of snacks (≥2 per day, excluding fruit and nut snacks)
- Low fibre intake (<22 g/d)
- Willing to follow the protocol and provide consent
Exclusion Criteria:
- Allergy or intolerance to snack ingredients (assessed at screening)
- Dislike of study snacks
- Regular consumption of intervention foods as snacks (twice a day in last month)
- Diabetes
- Major active psychiatric conditions (e.g. schizophrenia) or current eating disorder
- Active treatment for cancer in the last year
- Severe renal, cardiac or pulmonary disease or any other chronic medical condition
- Severe oesophagitis, gastritis or duodenitis
- Active diverticulitis or intestinal/colonic strictures
- Crohns disease or Ulcerative colitis
- Abdominal surgery (except appendicectomy or cholecystectomy)
- Irritable bowel syndrome
- Functional constipation
- Functional diarrhoea
- Antibiotics (past 4 weeks)
- Ongoing therapy with drugs affecting gastrointestinal motility
- Use of medical devices (Pacemakers, infusion pumps, insulin pumps)
- Women who are pregnant/lactating/planning pregnancy
- Recent/ongoing consumption of probiotics/prebiotics (past 4 weeks)
- Ongoing abuse of alcohol/drugs/other medication
- Very high physical activity levels
- Unexplained/unintentional weight loss in the past 6 months
Plan d'étude
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: La prévention
- Répartition: Randomisé
- Modèle interventionnel: Affectation parallèle
- Masquage: Double
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
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Comparateur actif: Intervention snack 1
Snack food believed to selectively promote the growth of beneficial bacterial strains in the human colon.
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To be eaten instead of regular snacks twice a day for 4 weeks.
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Comparateur actif: Intervention snack 2
Snack food believed to selectively promote the growth of beneficial bacterial strains in the human colon.
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To be eaten instead of regular snacks twice a day for 4 weeks.
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Comparateur placebo: Control snack
Control snack food reflecting the macro-nutrient profile of a typical UK snack.
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To be eaten instead of regular snacks twice a day for 4 weeks.
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Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Faecal bifidobacteria
Délai: Baseline
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
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Baseline
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Faecal bifidobacteria
Délai: Day 28
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
|
Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Whole gut transit time
Délai: Baseline
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Measured using the SmartPill wireless motility capsule
|
Baseline
|
Whole gut transit time
Délai: Day 28
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Measured using the SmartPill wireless motility capsule
|
Day 28
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Regional gut transit time
Délai: Baseline
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Measured using the SmartPill wireless motility capsule
|
Baseline
|
Regional gut transit time
Délai: Day 28
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Measured using the SmartPill wireless motility capsule
|
Day 28
|
Regional gut pH
Délai: Baseline
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Measured using the SmartPill wireless motility capsule
|
Baseline
|
Regional gut pH
Délai: Day 28
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Measured using the SmartPill wireless motility capsule
|
Day 28
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Faecal gut microbiota (alpha- and beta-diversity)
Délai: Baseline
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Baseline
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Faecal gut microbiota (alpha- and beta-diversity)
Délai: Day 28
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
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Faecal short-chain fatty acids (SCFA)
Délai: Baseline
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Measured by gas liquid chromatography of stool sample
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Baseline
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Faecal short-chain fatty acids (SCFA)
Délai: Day 28
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Measured by gas liquid chromatography of stool sample
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Day 28
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Faecal water
Délai: Baseline
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Measured by lyophilization of stool sample
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Baseline
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Faecal water
Délai: Day 28
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Measured by lyophilization of stool sample
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Day 28
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Faecal volatile organic compounds
Délai: Baseline
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Measured by gas-chromatography mass-spectrometry of stool samples
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Baseline
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Faecal volatile organic compounds
Délai: Day 28
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Measured by gas-chromatography mass-spectrometry of stool samples
|
Day 28
|
Gut symptoms
Délai: Week 0
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Gastrointestinal symptoms rating scale (7-day; questionnaire)
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Week 0
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Gut symptoms
Délai: week 4
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Gastrointestinal symptoms rating scale (7-day; questionnaire)
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week 4
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Stool frequency
Délai: Week 0
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Bristol stool form scale (7-day; questionnaire)
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Week 0
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Stool frequency
Délai: Week 4
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Bristol stool form scale(7-day; questionnaire)
|
Week 4
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Dietary intake
Délai: Week 0
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7-day food diary
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Week 0
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Dietary intake
Délai: Week 4
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7-day food diary
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Week 4
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Quality of life
Délai: Baseline
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SF-36 questionnaire
|
Baseline
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Quality of life
Délai: Day 28
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SF-36 questionnaire
|
Day 28
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Mood
Délai: Baseline
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Hospital anxiety and depression scale
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Baseline
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Mood
Délai: Day 28
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Hospital anxiety and depression scale
|
Day 28
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Physical activity
Délai: Baseline
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Recent physical activity questionnaire
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Baseline
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Physical activity
Délai: Day 28
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Recent physical activity questionnaire
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Day 28
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Dietary metabolites (various)
Délai: Baseline
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Measured in blood sample
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Baseline
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Dietary metabolites (various)
Délai: Day 28
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Measured in blood sample
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Day 28
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Particle size of masticated snack foods
Délai: Day 28
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Mechanical sieving and laser diffraction of masticated snack foods
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Day 28
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Autres mesures de résultats
Mesure des résultats |
Description de la mesure |
Délai |
---|---|---|
Adverse events
Délai: From baseline - day 28
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Interview-administered questionnaire
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From baseline - day 28
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Acceptability of snack products
Délai: Day 28
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Questionnaire
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Day 28
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Collaborateurs et enquêteurs
Parrainer
Les enquêteurs
- Chercheur principal: Kevin Whelan, Prof., King's College London
Publications et liens utiles
Dates d'enregistrement des études
Dates principales de l'étude
Début de l'étude (Réel)
Achèvement primaire (Réel)
Achèvement de l'étude (Réel)
Dates d'inscription aux études
Première soumission
Première soumission répondant aux critères de contrôle qualité
Première publication (Réel)
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
Dernière mise à jour soumise répondant aux critères de contrôle qualité
Dernière vérification
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
- HR-17/18-5341
Plan pour les données individuelles des participants (IPD)
Prévoyez-vous de partager les données individuelles des participants (DPI) ?
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Étudie un produit d'appareil réglementé par la FDA américaine
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