The Effect of Bitter, Umami and Sweet Tastants on Food Intake

NCT ID: NCT01956838

Last Updated: 2014-10-15

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 15 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2013-09-30
• Study Completion Date: 2014-08-31

Brief Summary

Rationale: The appearance of tastants in the small intestine can result in the activation of a negative feedback mechanism from different parts of the intestine to the stomach, the small intestine and to the central nervous system. These processes inhibit food processing, appetite sensations and food intake, and furthermore they increase feelings of satiety and satiation. We will investigate the effects of intraduodenal infusion of quinine 75mg (bitter), rebaudioside A 540mg (sweet), monosodium glutamate 2g (umami), a combination of these tastants (quinine, rebaudioside A, monosodium glutamate) and placebo (5 test days in total) on ad libitum food intake, satiation and in vivo release of the gut satiety peptides CCK and GLP-1.

Study design: To assess the effect of intraduodenal infusion of single ingredients and a combination of tastants (bitter, umami and sweet) on ad libitum food intake.

Secondary Objective(s):

1. To investigate the effect of intraduodenal delivery of a combination of tastants on satiation.

2. To assess the effect of intraduodenal delivery of a combination of tastants on gastrointestinal hormone release.

3. To assess the effects of the tastants quinine, rebaudioside A and monosodium glutamate on the parameters as mentioned under the primary objective, and under secondary objectives 1 and 2.

4. To compare the effects, as mentioned under the primary objective, and under secondary objectives 1 and 2, of the combination of tastants to those of the three single tastants quinine, rebaudioside A and monosodium glutamate.

Conditions

Obesity

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: CROSSOVER
• Primary Study Purpose: BASIC_SCIENCE
• Blinding Strategy: SINGLE

Study Groups

Umami

intraduodenal infusion of umami

Group Type: EXPERIMENTAL

umami

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of umami tastant

sweet

intraduodenal infusion of sweet tastant

Group Type: EXPERIMENTAL

sweet

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of sweet tastant

bitter

intraduodenal infusion of bitter tastant

Group Type: EXPERIMENTAL

bitter

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of bitter tastant

combination

intraduodenal infusion of a combination of tastants (umami, bitter and sweet)

Group Type: EXPERIMENTAL

umami

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of umami tastant

bitter

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of bitter tastant

sweet

Intervention Type: DIETARY_SUPPLEMENT

intraduodenal infusion of sweet tastant

placebo

intraduodenal infusion of placebo (tap water)

Group Type: PLACEBO_COMPARATOR

No interventions assigned to this group

Interventions

umami

intraduodenal infusion of umami tastant

Intervention Type: DIETARY_SUPPLEMENT

bitter

intraduodenal infusion of bitter tastant

Intervention Type: DIETARY_SUPPLEMENT

sweet

intraduodenal infusion of sweet tastant

Intervention Type: DIETARY_SUPPLEMENT

Eligibility Criteria

Inclusion Criteria

• Based on medical history and previous examination, no gastrointestinal complaints can be defined.
• Age between 18 and 65 years. This study will include healthy adult subjects (male and female). Women must be taking contraceptives.
• BMI between 18 and 25 kg/m2)
• Weight stable over at least the last 6 months

Exclusion Criteria

• History of severe cardiovascular, respiratory, urogenital, gastrointestinal/ hepatic, hematological/immunologic, HEENT (head, ears, eyes, nose, throat), dermatological/connective tissue, musculoskeletal, metabolic/nutritional, endocrine, neurological/psychiatric diseases, allergy, major surgery and/or laboratory assessments which might limit participation in or completion of the study protocol. The severity of the disease (major interference with the execution of the experiment or potential influence on the study outcomes) will be decided by the principal investigator.
• Use of medication, including vitamin supplementation, except oral contraceptives, within 14 days prior to testing
• Administration of investigational drugs or participation in any scientific intervention study which may interfere with this study (to be decided by the principle investigator), in the 180 days prior to the study
• Major abdominal surgery interfering with gastrointestinal function (uncomplicated appendectomy, cholecystectomy and hysterectomy allowed, and other surgery upon judgement of the principle investigator)
• Dieting (medically prescribed, vegetarian, diabetic, macrobiological, biological dynamic)
• Pregnancy, lactation
• Excessive alcohol consumption (>20 alcoholic consumptions per week)
• Smoking
• Blood donation within 3 months before the study period
• Self-admitted HIV-positive state
• Weight <60kg
• Non-tasters of sweet, bitter or umami
• Evidence of MSG-hypersensitivity or Chinese restaurant syndrome

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 65 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Maastricht University Medical Center

OTHER

Sponsor Role: lead

Responsible Party

Responsibility Role: SPONSOR

Principal Investigators

Prof Masclee, MD,PhD

Role: PRINCIPAL_INVESTIGATOR

Maastricht University Medical Center

Locations

Maastricht University Medical Center

Maastricht, Maastricht, Netherlands

Countries

Netherlands

References

van Avesaat M, Troost FJ, Ripken D, Peters J, Hendriks HF, Masclee AA. Intraduodenal infusion of a combination of tastants decreases food intake in humans. Am J Clin Nutr. 2015 Oct;102(4):729-35. doi: 10.3945/ajcn.115.113266. Epub 2015 Aug 19.

Reference Type: DERIVED

PMID: 26289437 (View on PubMed)

Other Identifiers

NL44428.068.13/METC 13-2-025

Identifier Type: -

Identifier Source: org_study_id