Effects of Oligofructose and Barley on Satiety and Energy Intake

Unilever

Status

Completed

Conditions

Appetite Regulation

Treatments

Dietary Supplement: beta-glucan and fructooligosaccharide

Study type

Interventional

Funder types

Industry

Identifiers

NCT00776256

07002V

Details and patient eligibility

About

The effect of beta-glucan or fructo-oligosaccharide or their combination in bars on satiety and food intake was tested by supplying these bars on two consecutive days.

Full description

Background: Increasing gastro-intestinal viscosity or colonic fermentation is suggested to help improve appetite control and reduce food intake. Beta-glucan (BG) and fructo-oligosaccharide (FOS) are food ingredients proposed to act this way, but results so far remain inconclusive.

Objective: To test the effect of FOS, BG, or their combination in bars on appetite ratings and food intake during 2 consecutive days.

Design: In a 4-way balanced order cross-over double-blind design, 21 healthy volunteers (mean BMI 25.9 kg/m2) received a meal replacement bar at 09.00h and an ad libitum lunch at 13.00h on 2 consecutive days. On day 1 only, subjects consumed a second (identical) bar at 17.00h and a fixed snack at 19.00h. The control bar contained 0.3g BG (control, from 6.8 g oats), vs equi-caloric bar formulations containing an additional: 1) 0.9 g BG (from 8.0g barley), 2) 8g FOS, or 3) 0.9 g BG + 8g FOS. Appetite scores and subsequent ad libitum test meal intakes were measured. Bar viscosities were determined under simulated gastric conditions. Results were analyzed using ANCOVA.

Results: Addition of BG, FOS or their combination did not affect appetite ratings or food intake, although addition of BG to the bar doubled apparent gastric viscosity (841 vs 351 mPa.s).

Conclusions: BG, FOS or their combination in bars at these levels do not improve appetite control when consumed on 2 consecutive days. Efficacy might be increased by a longer exposure period, increasing the BG content, or a form of BG that generates even higher gastric viscosity.

Enrollment

24 patients

Sex

All

Ages

18 to 60 years old

Volunteers

Accepts Healthy Volunteers

Inclusion criteria

Age at start of the study 18 till 60 years
Quetelet-Index (BMI) from 21 till 32 kg/m2 inclusive
Apparently healthy: measured by questionnaire: no reported current or previous metabolic diseases or chronic gastrointestinal disorders
Reported dietary habits: no medically prescribed diet, no slimming diet, used to eat 3 meals a day, no vegetarian, macro-biotic or biologic dynamic food habits
No Fibre supplements (only once a day)
No blood donations during the study.
Reported intense sporting activities less than 10h/w
Reported alcohol consumption less than 21 units/w (female volunteers) or less than 28 units/w (male volunteers)
Having a General Practitioner
Informed consent signed
Recruitment form filled out

Exclusion criteria

Smoking
Dislike, allergy/intolerance or not known with the foods of the ad libitum meal
Possible eating disorder (measured by SCOFF questionnaire)
High or very high restrained eaters (measured by questionnaire) (men with BMI < 27: restraint score > 2.37, men with BMI less than 27: restraint score > 3.04, women with BMI < 26: restraint score > 3.24, women with BMI less than 26: restraint score > 3.41)
Reported medical treatment that may affect eating habits/satiety
Reported intolerance or allergy to test products
Women reported lactating (or lactating < 6 weeks ago), pregnant (or pregnant < 3 months ago) or wish to become pregnant during the study
Reported weight loss/gain (10%) in the last six month before the trial
Reported participation in another biomedical trial 1 month before the start of the study
Reported working on late turns -