- ICH GCP
- Registro degli studi clinici negli Stati Uniti
- Sperimentazione clinica 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
Panoramica dello studio
Stato
Condizioni
Descrizione dettagliata
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.
Tipo di studio
Iscrizione (Effettivo)
Fase
- Non applicabile
Contatti e Sedi
Luoghi di studio
-
-
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London, Regno Unito, SE1 9NH
- King's College London Waterloo Campus
-
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Criteri di partecipazione
Criteri di ammissibilità
Età idonea allo studio
Accetta volontari sani
Sessi ammissibili allo studio
Descrizione
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
Piano di studio
Come è strutturato lo studio?
Dettagli di progettazione
- Scopo principale: Prevenzione
- Assegnazione: Randomizzato
- Modello interventistico: Assegnazione parallela
- Mascheramento: Doppio
Armi e interventi
Gruppo di partecipanti / Arm |
Intervento / Trattamento |
|---|---|
|
Comparatore attivo: 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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Comparatore attivo: 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.
|
|
Comparatore 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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Cosa sta misurando lo studio?
Misure di risultato primarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Faecal bifidobacteria
Lasso di tempo: Baseline
|
Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Baseline
|
|
Faecal bifidobacteria
Lasso di tempo: Day 28
|
Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
|
Misure di risultato secondarie
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Whole gut transit time
Lasso di tempo: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
|
Whole gut transit time
Lasso di tempo: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Regional gut transit time
Lasso di tempo: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
|
Regional gut transit time
Lasso di tempo: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Regional gut pH
Lasso di tempo: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
|
Regional gut pH
Lasso di tempo: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Faecal gut microbiota (alpha- and beta-diversity)
Lasso di tempo: Baseline
|
Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Baseline
|
|
Faecal gut microbiota (alpha- and beta-diversity)
Lasso di tempo: Day 28
|
Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
|
|
Faecal short-chain fatty acids (SCFA)
Lasso di tempo: Baseline
|
Measured by gas liquid chromatography of stool sample
|
Baseline
|
|
Faecal short-chain fatty acids (SCFA)
Lasso di tempo: Day 28
|
Measured by gas liquid chromatography of stool sample
|
Day 28
|
|
Faecal water
Lasso di tempo: Baseline
|
Measured by lyophilization of stool sample
|
Baseline
|
|
Faecal water
Lasso di tempo: Day 28
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Measured by lyophilization of stool sample
|
Day 28
|
|
Faecal volatile organic compounds
Lasso di tempo: Baseline
|
Measured by gas-chromatography mass-spectrometry of stool samples
|
Baseline
|
|
Faecal volatile organic compounds
Lasso di tempo: Day 28
|
Measured by gas-chromatography mass-spectrometry of stool samples
|
Day 28
|
|
Gut symptoms
Lasso di tempo: Week 0
|
Gastrointestinal symptoms rating scale (7-day; questionnaire)
|
Week 0
|
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Gut symptoms
Lasso di tempo: week 4
|
Gastrointestinal symptoms rating scale (7-day; questionnaire)
|
week 4
|
|
Stool frequency
Lasso di tempo: Week 0
|
Bristol stool form scale (7-day; questionnaire)
|
Week 0
|
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Stool frequency
Lasso di tempo: Week 4
|
Bristol stool form scale(7-day; questionnaire)
|
Week 4
|
|
Dietary intake
Lasso di tempo: Week 0
|
7-day food diary
|
Week 0
|
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Dietary intake
Lasso di tempo: Week 4
|
7-day food diary
|
Week 4
|
|
Quality of life
Lasso di tempo: Baseline
|
SF-36 questionnaire
|
Baseline
|
|
Quality of life
Lasso di tempo: Day 28
|
SF-36 questionnaire
|
Day 28
|
|
Mood
Lasso di tempo: Baseline
|
Hospital anxiety and depression scale
|
Baseline
|
|
Mood
Lasso di tempo: Day 28
|
Hospital anxiety and depression scale
|
Day 28
|
|
Physical activity
Lasso di tempo: Baseline
|
Recent physical activity questionnaire
|
Baseline
|
|
Physical activity
Lasso di tempo: Day 28
|
Recent physical activity questionnaire
|
Day 28
|
|
Dietary metabolites (various)
Lasso di tempo: Baseline
|
Measured in blood sample
|
Baseline
|
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Dietary metabolites (various)
Lasso di tempo: Day 28
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Measured in blood sample
|
Day 28
|
|
Particle size of masticated snack foods
Lasso di tempo: Day 28
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Mechanical sieving and laser diffraction of masticated snack foods
|
Day 28
|
Altre misure di risultato
Misura del risultato |
Misura Descrizione |
Lasso di tempo |
|---|---|---|
|
Adverse events
Lasso di tempo: From baseline - day 28
|
Interview-administered questionnaire
|
From baseline - day 28
|
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Acceptability of snack products
Lasso di tempo: Day 28
|
Questionnaire
|
Day 28
|
Collaboratori e investigatori
Sponsor
Investigatori
- Investigatore principale: Kevin Whelan, Prof., King's College London
Pubblicazioni e link utili
Studiare le date dei record
Studia le date principali
Inizio studio (Effettivo)
Completamento primario (Effettivo)
Completamento dello studio (Effettivo)
Date di iscrizione allo studio
Primo inviato
Primo inviato che soddisfa i criteri di controllo qualità
Primo Inserito (Effettivo)
Aggiornamenti dei record di studio
Ultimo aggiornamento pubblicato (Effettivo)
Ultimo aggiornamento inviato che soddisfa i criteri QC
Ultimo verificato
Maggiori informazioni
Termini relativi a questo studio
Parole chiave
Altri numeri di identificazione dello studio
- HR-17/18-5341
Piano per i dati dei singoli partecipanti (IPD)
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