- ICH GCP
- Amerikanska kliniska prövningsregistret
- Klinisk prövning 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
Studieöversikt
Status
Betingelser
Intervention / Behandling
Detaljerad beskrivning
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.
Studietyp
Inskrivning (Faktisk)
Fas
- Inte tillämpbar
Kontakter och platser
Studieorter
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-
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London, Storbritannien, SE1 9NH
- King's College London Waterloo Campus
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Deltagandekriterier
Urvalskriterier
Åldrar som är berättigade till studier
Tar emot friska volontärer
Kön som är behöriga för studier
Beskrivning
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
Studieplan
Hur är studien utformad?
Designdetaljer
- Primärt syfte: Förebyggande
- Tilldelning: Randomiserad
- Interventionsmodell: Parallellt uppdrag
- Maskning: Dubbel
Vapen och interventioner
Deltagargrupp / Arm |
Intervention / Behandling |
---|---|
Aktiv komparator: 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.
|
Aktiv komparator: 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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Placebo-jämförare: 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.
|
Vad mäter studien?
Primära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
---|---|---|
Faecal bifidobacteria
Tidsram: Baseline
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Baseline
|
Faecal bifidobacteria
Tidsram: Day 28
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
|
Sekundära resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
---|---|---|
Whole gut transit time
Tidsram: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
Whole gut transit time
Tidsram: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
Regional gut transit time
Tidsram: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
Regional gut transit time
Tidsram: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
Regional gut pH
Tidsram: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
Regional gut pH
Tidsram: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
Faecal gut microbiota (alpha- and beta-diversity)
Tidsram: Baseline
|
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)
Tidsram: Day 28
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
|
Day 28
|
Faecal short-chain fatty acids (SCFA)
Tidsram: Baseline
|
Measured by gas liquid chromatography of stool sample
|
Baseline
|
Faecal short-chain fatty acids (SCFA)
Tidsram: Day 28
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Measured by gas liquid chromatography of stool sample
|
Day 28
|
Faecal water
Tidsram: Baseline
|
Measured by lyophilization of stool sample
|
Baseline
|
Faecal water
Tidsram: Day 28
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Measured by lyophilization of stool sample
|
Day 28
|
Faecal volatile organic compounds
Tidsram: Baseline
|
Measured by gas-chromatography mass-spectrometry of stool samples
|
Baseline
|
Faecal volatile organic compounds
Tidsram: Day 28
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Measured by gas-chromatography mass-spectrometry of stool samples
|
Day 28
|
Gut symptoms
Tidsram: Week 0
|
Gastrointestinal symptoms rating scale (7-day; questionnaire)
|
Week 0
|
Gut symptoms
Tidsram: week 4
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Gastrointestinal symptoms rating scale (7-day; questionnaire)
|
week 4
|
Stool frequency
Tidsram: Week 0
|
Bristol stool form scale (7-day; questionnaire)
|
Week 0
|
Stool frequency
Tidsram: Week 4
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Bristol stool form scale(7-day; questionnaire)
|
Week 4
|
Dietary intake
Tidsram: Week 0
|
7-day food diary
|
Week 0
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Dietary intake
Tidsram: Week 4
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7-day food diary
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Week 4
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Quality of life
Tidsram: Baseline
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SF-36 questionnaire
|
Baseline
|
Quality of life
Tidsram: Day 28
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SF-36 questionnaire
|
Day 28
|
Mood
Tidsram: Baseline
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Hospital anxiety and depression scale
|
Baseline
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Mood
Tidsram: Day 28
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Hospital anxiety and depression scale
|
Day 28
|
Physical activity
Tidsram: Baseline
|
Recent physical activity questionnaire
|
Baseline
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Physical activity
Tidsram: Day 28
|
Recent physical activity questionnaire
|
Day 28
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Dietary metabolites (various)
Tidsram: Baseline
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Measured in blood sample
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Baseline
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Dietary metabolites (various)
Tidsram: 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
Tidsram: 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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Andra resultatmått
Resultatmått |
Åtgärdsbeskrivning |
Tidsram |
---|---|---|
Adverse events
Tidsram: 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
Tidsram: Day 28
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Questionnaire
|
Day 28
|
Samarbetspartners och utredare
Sponsor
Utredare
- Huvudutredare: Kevin Whelan, Prof., King's College London
Publikationer och användbara länkar
Studieavstämningsdatum
Studera stora datum
Studiestart (Faktisk)
Primärt slutförande (Faktisk)
Avslutad studie (Faktisk)
Studieregistreringsdatum
Först inskickad
Först inskickad som uppfyllde QC-kriterierna
Första postat (Faktisk)
Uppdateringar av studier
Senaste uppdatering publicerad (Faktisk)
Senaste inskickade uppdateringen som uppfyllde QC-kriterierna
Senast verifierad
Mer information
Termer relaterade till denna studie
Nyckelord
Andra studie-ID-nummer
- HR-17/18-5341
Plan för individuella deltagardata (IPD)
Planerar du att dela individuella deltagardata (IPD)?
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