- ICH GCP
- Registro de ensayos clínicos de EE. UU.
- Ensayo clínico 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
Descripción general del estudio
Estado
Condiciones
Descripción detallada
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 de estudio
Inscripción (Actual)
Fase
- No aplica
Contactos y Ubicaciones
Ubicaciones de estudio
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London, Reino Unido, SE1 9NH
- King's College London Waterloo Campus
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Criterios de participación
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Descripción
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 de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Propósito principal: Prevención
- Asignación: Aleatorizado
- Modelo Intervencionista: Asignación paralela
- Enmascaramiento: Doble
Armas e Intervenciones
Grupo de participantes/brazo |
Intervención / Tratamiento |
|---|---|
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Comparador activo: 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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Comparador activo: 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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Comparador de placebos: 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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¿Qué mide el estudio?
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Faecal bifidobacteria
Periodo de tiempo: 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
Periodo de tiempo: 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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Medidas de resultado secundarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Whole gut transit time
Periodo de tiempo: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
|
Whole gut transit time
Periodo de tiempo: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Regional gut transit time
Periodo de tiempo: Baseline
|
Measured using the SmartPill wireless motility capsule
|
Baseline
|
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Regional gut transit time
Periodo de tiempo: Day 28
|
Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Regional gut pH
Periodo de tiempo: Baseline
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Measured using the SmartPill wireless motility capsule
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Baseline
|
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Regional gut pH
Periodo de tiempo: Day 28
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Measured using the SmartPill wireless motility capsule
|
Day 28
|
|
Faecal gut microbiota (alpha- and beta-diversity)
Periodo de tiempo: 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)
Periodo de tiempo: Day 28
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Measured by 16S community profiling (Illumina Miseq) of bacterial genomic DNA isolated from participant stool samples
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Day 28
|
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Faecal short-chain fatty acids (SCFA)
Periodo de tiempo: 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)
Periodo de tiempo: 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
Periodo de tiempo: Baseline
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Measured by lyophilization of stool sample
|
Baseline
|
|
Faecal water
Periodo de tiempo: 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
Periodo de tiempo: Baseline
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Measured by gas-chromatography mass-spectrometry of stool samples
|
Baseline
|
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Faecal volatile organic compounds
Periodo de tiempo: Day 28
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Measured by gas-chromatography mass-spectrometry of stool samples
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Day 28
|
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Gut symptoms
Periodo de tiempo: 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
Periodo de tiempo: week 4
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Gastrointestinal symptoms rating scale (7-day; questionnaire)
|
week 4
|
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Stool frequency
Periodo de tiempo: Week 0
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Bristol stool form scale (7-day; questionnaire)
|
Week 0
|
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Stool frequency
Periodo de tiempo: Week 4
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Bristol stool form scale(7-day; questionnaire)
|
Week 4
|
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Dietary intake
Periodo de tiempo: Week 0
|
7-day food diary
|
Week 0
|
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Dietary intake
Periodo de tiempo: Week 4
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7-day food diary
|
Week 4
|
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Quality of life
Periodo de tiempo: Baseline
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SF-36 questionnaire
|
Baseline
|
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Quality of life
Periodo de tiempo: Day 28
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SF-36 questionnaire
|
Day 28
|
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Mood
Periodo de tiempo: Baseline
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Hospital anxiety and depression scale
|
Baseline
|
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Mood
Periodo de tiempo: Day 28
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Hospital anxiety and depression scale
|
Day 28
|
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Physical activity
Periodo de tiempo: Baseline
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Recent physical activity questionnaire
|
Baseline
|
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Physical activity
Periodo de tiempo: Day 28
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Recent physical activity questionnaire
|
Day 28
|
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Dietary metabolites (various)
Periodo de tiempo: Baseline
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Measured in blood sample
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Baseline
|
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Dietary metabolites (various)
Periodo de tiempo: Day 28
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Measured in blood sample
|
Day 28
|
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Particle size of masticated snack foods
Periodo de tiempo: Day 28
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Mechanical sieving and laser diffraction of masticated snack foods
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Day 28
|
Otras medidas de resultado
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
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Adverse events
Periodo de tiempo: From baseline - day 28
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Interview-administered questionnaire
|
From baseline - day 28
|
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Acceptability of snack products
Periodo de tiempo: Day 28
|
Questionnaire
|
Day 28
|
Colaboradores e Investigadores
Patrocinador
Investigadores
- Investigador principal: Kevin Whelan, Prof., King's College London
Publicaciones y enlaces útiles
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio (Actual)
Finalización primaria (Actual)
Finalización del estudio (Actual)
Fechas de registro del estudio
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Actual)
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Más información
Términos relacionados con este estudio
Palabras clave
Otros números de identificación del estudio
- HR-17/18-5341
Plan de datos de participantes individuales (IPD)
¿Planea compartir datos de participantes individuales (IPD)?
Información sobre medicamentos y dispositivos, documentos del estudio
Estudia un producto farmacéutico regulado por la FDA de EE. UU.
Estudia un producto de dispositivo regulado por la FDA de EE. UU.
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