Comparative Study Between Colonoscopy Bowel Preparation With Clear Liquids, With and Without Two Servings of High Energy Nutritional Supplement

September 7, 2025 updated by: Clínica de Gastroenterologia
The high energy nutritional supplement Resource® Energy is approved for human nutritional support in various clinical conditions, yet it has been used off-label to alleviate the effects of hunger during bowel preparation for colonoscopy. Its impact in mucosa visualization quality and hunger alleviation is unknown. The product is liquid and nutritious but it is not transparent, thus it is conceivable that it could alleviate the discomfort of hunger during the preparation but possibly compromising mucosa visualization. In this study, participants who will undergo a colonoscopy (requested for an explicit medical indication) will take two bottles of the nutritional supplement during the usual bowel preparation. The quality of mucosal visualization and the participants opinion regarding satiety and product tolerance during bowel preparation will then be analysed.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

The high energy nutritional supplement Resource® Energy is approved for human nutritional support in various clinical conditions. However, it has been recommended by pharmacists to reduce hunger during bowel preparation for colonoscopy, without any medical prescription or recommendation as there is no scientific evidence regarding this use. Its impact in the quality of mucosal visualization during colonoscopy and in relieving hunger is unknown, thus requiring research.

The dietary supplement is liquid and nutritious, each serving consisting of 200 mL containing carbohydrates 42 g, lipids 10 g, proteins 11.2 g and fiber < 1 g, totalling 303 kcal. It is thus conceivable that it can mitigate the discomfortable feeling of hunger during bowel preparation, but because it is not transparent it could possibly hamper mucosa visualization.

One hundred and fifty control patients (with clinical indication for undergoing colonoscopy) will undergo bowel preparation as usual with the standard of care polyethylene glycol 3350 in 4 litres of water (Klean-Prep®): one day before the colonoscopy with no ingestion of solid foods, possibly with ingestion of clear liquids with or without sugar (such as tea or other transparent beverages without pulp, but not milk, yogurt, broth or gelatine), and with ingestion of 275,84 g (4 sachets) of polyethylene glycol 3350 in 4 litres of water in 3 to 4 hours (250 mL every 15 minutes), starting at 18:00; in the day of the exam the patients can drink the same clear liquids with or without sugar until 4 hours before the colonoscopy, which will be carried out in the morning.

One hundred and fifty patients (with clinical indication for undergoing colonoscopy) will undergo bowel preparation as usual and take two servings of Resource® Energy Apricot.

All patients will be asked about feelings of hunger or side effects of bowel preparation and colonoscopy (nausea, vomits, abdominal pain, abdominal discomfort, abdominal pressure, abdominal bloating, syncope, blood in stool, sleep disturbance, work absenteeism) in a scale from 0 to 10, before and after the colonoscopy. This scale is often used to assess appetite.

Colonoscopic mucosa visualization quality will be assessed in all patients using the Boston Bowel Preparation Scale, which is the most thoroughly validated and recommended scale.

Statistical comparison will the be performed between both groups, regarding colonoscopic mucosa visualization and side effects and sensations experienced, such as hunger.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
299

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Portugal
    • Coimbra District
      • Coimbra, Coimbra District, Portugal, 3000-098
        • Clínica de Gastroenterologia

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • individual requesting a non-contraindicated colonoscopy (with clinical indication) at the outpatient clinic.

Exclusion Criteria:

  • pregnancy
  • Allergy to any ingredient of Resource® Energy Apricot

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Supportive Care
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Triple

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: Control
Bowel preparation as usual. Colonoscopy.
Other: Bowel preparation as usual.

Bowel preparation as usual (one day before the colonoscopy with no ingestion of solid foods, possibly with ingestion of clear liquids with or without sugar (such as tea or other transparent beverages without pulp, but not milk, yogurt, broth or gelatine), and with ingestion of 275,84 g (4 sachets) of polyethylene glycol 3350 (Klean-Prep®) in 4 litres of water in 3 to 4 hours (250 mL every 15 minutes), starting at 18:00; in the day of the exam the patients can drink the same clear liquids with or without sugar until 4 hours before the colonoscopy, which will be carried out in the morning).

Colonoscopy.
Experimental: Dietary supplement

Bowel preparation as usual plus two bottles of the dietary supplement Resource® Energy Apricot.

Colonoscopy.
Dietary supplement: Resource® Energy Apricot

Bowel preparation as usual plus two bottles of Resource® Energy Apricot (one day before the colonoscopy with no ingestion of solid foods, possibly with ingestion of clear liquids with or without sugar (such as tea or other transparent beverages without pulp, but not milk, yogurt, broth or gelatine), with ingestion of one bottle of 200 mL of the dietary supplement at 08:00 and the other at 12:00, and with ingestion of 275,84 g (4 sachets) of polyethylene glycol 3350 (Klean-Prep®) in 4 litres of water in 3 to 4 hours (250 mL every 15 minutes), starting at 18:00; in the day of the exam the patients can drink the same clear liquids with or without sugar until 4 hours before the colonoscopy, which will be carried out in the morning).

Colonoscopy.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Mucosa visualization quality (Boston Bowel Preparation Scale)
Time Frame: During the procedure
Mucosa visualization quality assessed using the Boston Bowel Preparation Scale (0 to 9, 0 being the worst)
During the procedure

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Adenoma detection rate
Time Frame: During the procedure
Adenoma detection rate
During the procedure
Amount of rinsing needed
Time Frame: During the procedure
Amount of water (mL) injected to wash certain areas of the colon
During the procedure
Hunger during bowel preparation
Time Frame: Reported in the day of the procedure
Self-reported in a scale from 0 to 10 (10 being the worst)
Reported in the day of the procedure

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Clínica de Gastroenterologia

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Nestlé Portugal SA
Angelini Pharma Portugal, Unipessoal, Lda

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Chair: José AS Medeiros, PhD, Clínica de Gastroenterologia

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 30, 2020

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 28, 2022

Study Completion (Actual)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
May 28, 2022

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
July 10, 2021

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 8, 2021

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
October 21, 2021

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
September 12, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 7, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
September 1, 2025

More Information

Terms related to this study

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • 01 (Leona M. and Harry B. Helmsley Charitable Trust)

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

Cookie Settings

We use cookies to ensure that we give you the best experience on our website. For more details carefully read our Privacy and Cookies Policy. ...>>>You can change your preferences or withdraw your consent at any time by deleting the cookies from your website or computer as described in the policy. Please accept it and choose your preferences by ticking the corresponding boxes in the "Manage Settings" section below. Please carefully read our Terms of Service before you proceed with using any part of this website.
«Manage Settings