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Trial registered on ANZCTR

Registration number
Ethics application status
Date submitted
Date registered
Date last updated
Date data sharing statement initially provided
Date results information initially provided
Type of registration
Retrospectively registered

Titles & IDs
Public title
How consuming different types of rice flour affects how hungry you feel in healthy Australian adults.
Scientific title
The effect of consuming rice flour beverages and carbohydrate taste sensitivity on subsequent food consumption and satiety in healthy Australian adults..
Secondary ID [1] 298143 0
Universal Trial Number (UTN)
Trial acronym
Linked study record

Health condition
Health condition(s) or problem(s) studied:
Obesity 312683 0
Condition category
Condition code
Diet and Nutrition 311181 311181 0 0
Metabolic and Endocrine 311367 311367 0 0
Normal metabolism and endocrine development and function

Study type
Description of intervention(s) / exposure
Consumption of 1 x 200 g drink (treatment) made from either jasmine rice flour or riceberry rice flour in water (6.31% w/v). Treatments (including the control) are provided on separate days, in a random order and are to be drunk within five minutes. Adherence is measured via direct supervision. Washout period between drinks is at least 24 hours.
3 hours after treatment, participants are presented with an ad libitum buffet-style lunch and asked to eat until comfortably full.
Intervention code [1] 314361 0
Treatment: Other
Intervention code [2] 314507 0
Comparator / control treatment
Consumption of a 200 mL drink made from oligofrustose in water (6.31% w/v).
Control group

Primary outcome [1] 319944 0
Self-reported satiety ratings using a 100 mm visual analogue scale
Timepoint [1] 319944 0
Immediately prior to treatment (baseline), 3 hours post treatment and following ad libitum buffet.
Primary outcome [2] 319945 0
Food intake based on an ad libitum buffet. Food intake measured via weight using balanced scales (g food supplied - g food returned at the end of buffet)..
Timepoint [2] 319945 0
3 hours post treatment..
Secondary outcome [1] 369957 0
Carbohydrate taste sensitivity measured using an ascending concentration 3-alternate forced choice test. Three samples of solution are served to the participant, where, two samples are control samples (filtered deionised water) and one sample contains oligofructose solution.
Timepoint [1] 369957 0
Immediately prior to treatment (baseline), 3 hours post treatment.

Key inclusion criteria
- 18-55 years of age
- A non-smoker
- Have no known allergies
- Currently not pregnant or planning a pregnancy within the 6 month duration of the study
- Capable of fasting overnight
Minimum age
18 Years
Maximum age
55 Years
Both males and females
Can healthy volunteers participate?
Key exclusion criteria
Exclusion criteria included individuals who were: smokers, pregnant or lactating, taking any prescription medication that may interfere with their ability to taste, and were not able to consume a normal diet due to health problems at the time of testing.

Study design
Purpose of the study
Allocation to intervention
Randomised controlled trial
Procedure for enrolling a subject and allocating the treatment (allocation concealment procedures)
Allocation was concealed using unmarked drinking cups. All participants received the same styled drinking cup for each treatment.
Methods used to generate the sequence in which subjects will be randomised (sequence generation)
Simple randomisation using a randomisation table created by computer software. Participants were allocated a randomised sequence in order of date recruited.
Masking / blinding
Blinded (masking used)
Who is / are masked / blinded?
The people receiving the treatment/s

The people assessing the outcomes
Intervention assignment
Other design features
Not Applicable
Type of endpoint(s)
Statistical methods / analysis

Recruitment status
Date of first participant enrolment
Date of last participant enrolment
Date of last data collection
Sample size
Accrual to date
Recruitment in Australia
Recruitment state(s)
Recruitment postcode(s) [1] 26415 0
3125 - Burwood

Funding & Sponsors
Funding source category [1] 302668 0
Name [1] 302668 0
Deakin University, Centre for Advanced Sensory Science
Address [1] 302668 0
Deakin University
Centre for Advanced Sensory Science
School of Exercise and Nutrition Sciences
221 Burwood Hwy, Burwood, 3125
Country [1] 302668 0
Primary sponsor type
Professor Russell Keast
Deakin University
Centre for Advanced Sensory Science
School of Exercise and Nutrition Sciences
221 Burwood Hwy, Burwood, 3125,
Secondary sponsor category [1] 302648 0
Name [1] 302648 0
Address [1] 302648 0
Country [1] 302648 0

Ethics approval
Ethics application status
Ethics committee name [1] 303291 0
Deakin University Human Ethics Advisory Group Health (HEAG-H)
Ethics committee address [1] 303291 0
Deakin University
Faculty of Health
221 Burwood Hwy, Burwood, 3125, VIC
Ethics committee country [1] 303291 0
Date submitted for ethics approval [1] 303291 0
Approval date [1] 303291 0
Ethics approval number [1] 303291 0
HEAG-H 44_2018:

Brief summary
The sense of taste has a significant role for identification of nutrients in foods, thereby initiating a variety of physiological and psychological responses to the nutrients, including satiety. The aim of the present study is to assess if carbohydrate taste sensitivity has an effect on carbohydrate intake-mediated satiety and to determine if the fibre content of a common food (riceberry rice vs jasmine rice in the form of beverages) can influence satiety.
Trial website
Trial related presentations / publications
Public notes

Principal investigator
Name 93154 0
Prof Russell Keast
Address 93154 0
Deakin University
221 Burwood Hwy
Burwood 3125
Country 93154 0
Phone 93154 0
+61 03 92446944
Fax 93154 0
Email 93154 0
Contact person for public queries
Name 93155 0
Prof Russell Keast
Address 93155 0
Deakin University
221 Burwood Hwy
Burwood 3125
Country 93155 0
Phone 93155 0
+61 03 92446944
Fax 93155 0
Email 93155 0
Contact person for scientific queries
Name 93156 0
Prof Russell Keast
Address 93156 0
Deakin University
221 Burwood Hwy
Burwood 3125
Country 93156 0
Phone 93156 0
+61 03 92446944
Fax 93156 0
Email 93156 0

Data sharing statement
Will individual participant data (IPD) for this trial be available (including data dictionaries)?
No/undecided IPD sharing reason/comment
IPD will not be shared as it is not necessary for the analysis/interpretation of the results. However, we will share IPD with the editor/reviewers of the manuscript if requested.
What supporting documents are/will be available?
Informed consent form
Ethical approval
How or where can supporting documents be obtained?
Type [1] 2024 0
Ethical approval
Citation [1] 2024 0
Link [1] 2024 0
Email [1] 2024 0
Other [1] 2024 0
Type [2] 2025 0
Informed consent form
Citation [2] 2025 0
Link [2] 2025 0
Email [2] 2025 0
Other [2] 2025 0
Summary results
Have study results been published in a peer-reviewed journal?
Other publications
Have study results been made publicly available in another format?
Results – basic reporting
Results – plain English summary