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

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

Interventions

DIETARY_SUPPLEMENT

umami

intraduodenal infusion of umami tastant

DIETARY_SUPPLEMENT

bitter

intraduodenal infusion of bitter tastant

DIETARY_SUPPLEMENT

sweet

intraduodenal infusion of sweet tastant

Sponsors & Collaborators

• Maastricht University Medical Center

  lead OTHER

Principal Investigators

• Prof Masclee, MD,PhD · Maastricht University Medical Center

Study Design

Allocation

RANDOMIZED

Purpose

BASIC_SCIENCE

Masking

SINGLE

Model

CROSSOVER

Eligibility

Min Age

18 Years

Max Age

65 Years

Sex

ALL

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2013-09-30

Primary Completion

2014-08-31

Completion

2014-08-31

Countries

• Netherlands

Study Locations