Condition category
Digestive System
Date applied
12/02/2012
Date assigned
12/06/2012
Last edited
01/12/2015
Prospective/Retrospective
Retrospectively registered
Overall trial status
Completed
Recruitment status
No longer recruiting

Plain English Summary

Background and study aims
The company Sensus BV produces the food ingredient inulin, a type of soluble vegetable fibre extracted from chicory roots. Unsatisfactory bowel function occurs in many healthy adults, in particular among older people. However, while medical treatments (laxatives) developed for treatment of clinical constipation are effective against unsatisfactory bowel function, these treatments also have serious drawbacks. In particular it can be difficult to re-establish normal bowel function after long term use of laxatives. There is therefore a need to develop food-based strategies for safe self-management of unsatisfactory bowel function. It is known that consumption of fibre-rich vegetables tends to enhances and stabilises bowel function, possibly by providing good substrates for beneficial types of gut bacteria, but there are only few studies specifically investigating inulin.
The aim of the study is to measure the effect of inulin consumption on the stool frequency and stool consistency in healthy adults with unsatisfactory bowel function.

What does the study involve?
The study consists of two study periods each of 5 weeks, with at least two weeks between the periods. Participants will receive either the active inulin product (in the form of a sachet which is mixed with juice or another cold drink) or a placebo product (a ‘dummy product’ with similar taste and appearance, but no fibre content) to take twice a day for 5 weeks. After a break of at least 2 weeks, they will then have another 5 weeks of taking the other product (either the inulin or the placebo). This means that all participants will have the chance to try the active product during one of the two study periods they take part in.

Who can take part?
For this study we are looking for 22 men and women, between the age of 50 - 75 who are generally healthy, but have low stool frequency (2 days or more per week without successful bowel movements) and do not take any medication for it. Participants will be required to attend visits at Newcastle University.

When does the study take place?
The study period is from to 8th December 2011 to 20th June 2012.

Where does the study take place?
The study takes place at Newcastle University, in Newcastle upon Tyne, United Kingdom.

What are the benefits and risks to participants?
The benefit to participants is that if the product works, their well-being will benefit during the treatment period. Since the study product is a widely used food ingredient and several common foods can provide doses corresponding to those used in the study, any participant who feels that their bowel function has improved during (part of) the trial will be able to choose to continue treatment after the completion of the study and achieve the corresponding benefits (whether or not the perceived benefits are caused by the product itself or are a placebo effect).
The following potential risks were identified: 1. Possible minor side effects (flatulence, stomach rumbling) when consuming the study product; 2. Possible health risk if the study product gets wet and subsequently becomes mouldy; 3. Possible embarrassment when transporting stool samples, e.g. on public transport. Appropriate management procedures have been implemented to control each of these risks.

Who is funding the project?
The study will be financed by Sensus BV, Rosendaal, the Netherlands.

Who is the main contact?
Miss Carolyn Taylor, trials assistant.
Telephone: 0191 222 3592 or 07583252204
e-mail:InuFre@ncl.ac.uk
http://research.ncl.ac.uk/InuFre

Trial website

http://research.ncl.ac.uk/FHN/page.php?index=4

Contact information

Type

Scientific

Primary contact

Dr Kirsten Brandt

ORCID ID

http://orcid.org/0000-0002-7001-2459

Contact details

Human Nutrition Research Centre
Agriculture Building
Newcastle University
Newcastle upon Tyne
NE1 7RU
United Kingdom
+44 (0)191 222 5852
kirsten.brandt@ncl.ac.uk

Additional identifiers

EudraCT number

ClinicalTrials.gov number

Protocol/serial number

BH102085

Study information

Scientific title

Effects of Inulin versus placebo on bowel function in older people with a low Frequency of defecation

Acronym

InuFre

Study hypothesis

The principal question of this study is to quantify the effect of native inulin on the stool frequency and stool consistency in slightly constipated older people using validated questionnaires.

Ethics approval

Newcastle University Sage Faculty Ethics Committee, reference number BH102085, 1st December 2011

Study design

Randomised double-blind placebo-controlled cross-over study

Primary study design

Interventional

Secondary study design

Randomised controlled trial

Trial setting

Other

Trial type

Screening

Patient information sheet

Patient information sheet can be found at http://research.ncl.ac.uk/FHN/cmsDocs/inulin%20Information%20sheet%20final.pdf

Condition

Bowel function (unsatisfactory stool frequency)

Intervention

Intervention: Inulin from chicory roots, 10g daily orally
Placebo: Maltodextrin, 10g daily orally

5 weeks treatment followed by 2 weeks washout then 5 weeks treatment.

Intervention type

Other

Phase

Not Applicable

Drug names

Primary outcome measures

Stool frequency measured by diary, kept daily during weeks 1, 3 and 5 of each intervention period

Secondary outcome measures

1. Self-reported stool consistency measured using the Bristol scale
2. Patient assessment of constipation (PAC-SYM) questionnaire

Overall trial start date

08/12/2011

Overall trial end date

20/06/2012

Reason abandoned

Eligibility

Participant inclusion criteria

1. Healthy volunteers
2. Men and women aged between 50 and 75 years
3. Low stool frequency (2 days or more per week without successful bowel movements)

Participant type

Healthy volunteer

Age group

Senior

Gender

Both

Target number of participants

22

Participant exclusion criteria

1. Clinical constipation as defined by the Rome criteria
2. Anatomical cause of reduced bowel function
3. History of colonic or anal surgery
4. Current or recent (<5 years) diagnosis of cancer, coronary heart disease or diabetes
5. Inflammatory bowel diseases (Crohn’s disease, ulcerative colitis)
6. Use of antibiotics, laxatives or diuretics in the last 3 months
7. Current or recent (<3 months) use of opium preparations
8. Any other condition that in the view of the participant’s GP may make the participant unsuitable for the trial

Recruitment start date

08/12/2011

Recruitment end date

20/06/2012

Locations

Countries of recruitment

United Kingdom

Trial participating centre

Human Nutrition Research Centre
Newcastle upon Tyne
NE1 7RU
United Kingdom

Sponsor information

Organisation

Newcastle University (UK)

Sponsor details

Human Nutrition Research Centre
School of Agriculture
Food and Rural Development
Newcastle upon Tyne
NE1 7RU
United Kingdom

Sponsor type

University/education

Website

Funders

Funder type

Industry

Funder name

Sensus BV (Netherlands)

Alternative name(s)

Funding Body Type

Funding Body Subtype

Location

Results and Publications

Publication and dissemination plan

To be confirmed at a later date

Intention to publish date

Participant level data

Not provided at time of registration

Results - basic reporting

Publication summary

Publication citations

Additional files

Editorial Notes

30/11/2015: No publications found in PubMed.