Obesity and OverweightNCT07103967
Investigating the Effects of Calorie Information and Serving Size of Alcohol Products on Alcohol Consumption.
A study testing Calorie information manipulation and Serving size manipulation in people with Obesity and Overweight and Alcohol, run by University of Liverpool at 1 site in United Kingdom.
Trial summary
The present study aims to investigate whether alcohol consumption is reduced when participants are shown calorie information of alcohol products, compared with when calorie information is absent. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Obesity and Overweight, Alcohol
- What is being tested?
- Calorie information manipulation and Serving size manipulation
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 312 participants
- Where
- 1 siteUnited Kingdom
- Study dates
- 30 Jul 2025to 6 Dec 2025
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- Consume alcohol on a regular basis (at least one UK unit per week)
- Be aged 18 or over
Who cannot join
- Have a current or previously diagnosed alcohol use disorder
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Investigating the Effect of Alcohol Serving Size and Calorie Information on Alcohol Consumption: A Real-world Experiment
The present study aims to investigate whether alcohol consumption is reduced when participants are shown calorie information of alcohol products, compared with when calorie information is absent. We also wish to see whether alcohol consumption levels are reduced when changing the serving sizes available to participants.
Read the detailed description
We will examine the effect of alcohol calorie information on calorie and alcohol unit consumption in a semi-naturalistic real-world experiment by randomising pub quiz evenings to alcohol calorie information vs. absence of calorie information (control). Because current evidence for alcohol calorie information from online hypothetical choice experiments suggests any impact on alcohol consumption may be null or very small, we will compare and benchmark the size of any potential effect of alcohol calorie information to another public health alcohol intervention known to reduce alcohol consumption (alcohol serving size). We will achieve this by also randomizing evenings to normal sized servings of alcohol (control) vs. reduced serving sizes. In addition to examining effects of interventions on what people drink and eat during the pub quiz, we will examine alcohol and energy intake after the pub quiz to probe for potential compensatory behaviour in response to interventions. Because it is currently unclear how useful consumers find alcohol information when implemented in real-world conditions, we will also examine the extent to which participants perceive the interventions to be effective.
- Conditions
- Obesity and Overweight, Alcohol
- Being tested
- Calorie information manipulation, Serving size manipulation
- Medical subject headings
- Obesity, Overweight
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Calorie information manipulationBehavioural
The intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent.
Serving size manipulationBehavioural
The intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine.
| Study group | Role | What they receive |
|---|---|---|
| Calorie information present, serving size reduced | Experimental | Participants will be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them. Receives: Behavioral: Calorie information manipulation; Behavioral: Serving size manipulation |
| Calorie information present, serving size typical | Experimental | Participants will be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated. Receives: Behavioral: Calorie information manipulation; Behavioral: Serving size manipulation |
| Calorie information absent, serving size reduced | Experimental | Participants will not be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them. Receives: Behavioral: Calorie information manipulation; Behavioral: Serving size manipulation |
| Calorie information absent, serving size typical | Experimental | Participants will not be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated. Receives: Behavioral: Calorie information manipulation; Behavioral: Serving size manipulation |
What is being measured
The primary outcome is the main question the study is designed to answer.
Alcohol units
Amount of alcohol units consumed in the evening.
Measured: Duration of the evening (approximately 3 hours and 15 minutes)
Total calorie consumption
The amount of calories consumed during the evening.
Measured: Duration of the evening (approximately 3 hours and 15 minutes)
Secondary outcomes (3)
Perceived message effectiveness
Participants will be asked to rate whether the menu they were presented with, affected feelings of concern towards alcohol.
Measured: The day after the intervention
Follow-up energy intake
Participants will be asked to record the food and drink consumed immediately after leaving the pub quiz, for the rest of the evening.
Measured: Immediately after the intervention
Bar snack consumption (calories)
The amount of snacks consumed during the evening will be measured.
Measured: Duration of the evening (approximately 3 hours and 15 minutes)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted5 Aug 2025
- Study start30 Jul 2025
- Primary completion6 Dec 2025
- Study completion6 Dec 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Obesity and OverweightStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 312 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of Liverpool
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07103967
- Sponsor's protocol ID
- AlcCal Real-world Study
- Status last verified
- Jul 2025
- First submitted
- 29 Jul 2025
- Last updated
- 19 Feb 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: An anonymised data set will be published on the open science framework for anyone to access.
Study at a glance
From the registry record, last updated by the sponsor on 19 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Investigating the Effect of Alcohol Serving Size and Calorie Information on Alcohol Consumption: A Real-world Experiment
- ClinicalTrials.gov ID
- NCT07103967
- Acronym / sponsor ID
- AlcCal Real-world Study
- Conditions
- Obesity and Overweight, Alcohol
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 312 participants (actual)
- Lead sponsor
- University of LiverpoolUniversity, hospital or other
- Study start
- 30 Jul 2025 (actual)
- Primary completion
- 6 Dec 2025 (actual)
- Study completion
- 6 Dec 2025 (actual)
- First posted
- 5 Aug 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The present study aims to investigate whether alcohol consumption is reduced when participants are shown calorie information of alcohol products, compared with when calorie information is absent. We also wish to see whether alcohol consumption levels are reduced when changing the serving sizes available to participants.
Detailed description
We will examine the effect of alcohol calorie information on calorie and alcohol unit consumption in a semi-naturalistic real-world experiment by randomising pub quiz evenings to alcohol calorie information vs. absence of calorie information (control). Because current evidence for alcohol calorie information from online hypothetical choice experiments suggests any impact on alcohol consumption may be null or very small, we will compare and benchmark the size of any potential effect of alcohol calorie information to another public health alcohol intervention known to reduce alcohol consumption (alcohol serving size). We will achieve this by also randomizing evenings to normal sized servings of alcohol (control) vs. reduced serving sizes. In addition to examining effects of interventions on what people drink and eat during the pub quiz, we will examine alcohol and energy intake after the pub quiz to probe for potential compensatory behaviour in response to interventions. Because it is currently unclear how useful consumers find alcohol information when implemented in real-world conditions, we will also examine the extent to which participants perceive the interventions to be effective.
Study design
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 4
| Arm | Type | Receives |
|---|---|---|
| Calorie information present, serving size reduced | Experimental | Behavioral: Calorie information manipulation, Behavioral: Serving size manipulationParticipants will be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them. |
| Calorie information present, serving size typical | Experimental | Behavioral: Calorie information manipulation, Behavioral: Serving size manipulationParticipants will be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated. |
| Calorie information absent, serving size reduced | Experimental | Behavioral: Calorie information manipulation, Behavioral: Serving size manipulationParticipants will not be presented with calorie information of alcohol products, and will have a restricted selection of serving sizes of drinks available to them. |
| Calorie information absent, serving size typical | Experimental | Behavioral: Calorie information manipulation, Behavioral: Serving size manipulationParticipants will not be presented with calorie information of alcohol products, and the serving sizes of drinks available to participants will not be manipulated. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- Consume alcohol on a regular basis (at least one UK unit per week)
- Be aged 18 or over
Key exclusion criteria (1 listed)
- Have a current or previously diagnosed alcohol use disorder
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Calorie information manipulationThe intervention will be administered by changing the information presenting to participants at point-of-choice when ordering alcoholic drinks and bar snacks. When alcohol calorie information is present, participants will see the calorie content of alcohol products on menus and at other point-of-choice locations. When it is not present, this information will be absent. | Behavioural | Calorie information absent, serving size reduced, Calorie information absent, serving size typical, Calorie information present, serving size reduced, Calorie information present, serving size typical |
| Serving size manipulationThe intervention will be administered by changing the availability of alcoholic drinks. When serving sizes are reduced, participants will only be able to order 2/3 pint of 1/2 servings of beer, and 125 ml servings of wine. When serving sizes are not reduced, participants will be able to order 1 pint servings or 1/2 servings of beer, and 175 ml or 125 ml servings of wine. | Behavioural | Calorie information absent, serving size reduced, Calorie information absent, serving size typical, Calorie information present, serving size reduced, Calorie information present, serving size typical |
Primary outcome
Alcohol units
Time frame: Duration of the evening (approximately 3 hours and 15 minutes)
Amount of alcohol units consumed in the evening.
Total calorie consumption
Time frame: Duration of the evening (approximately 3 hours and 15 minutes)
The amount of calories consumed during the evening.
3 secondary outcomes
Perceived message effectiveness
Time frame: The day after the intervention
Follow-up energy intake
Time frame: Immediately after the intervention
Bar snack consumption (calories)
Time frame: Duration of the evening (approximately 3 hours and 15 minutes)
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 19 Feb 2026.
- Individual participant dataSharing planned: Yes. An anonymised data set will be published on the open science framework for anyone to access.
Related trials for Obesity and Overweight
RecruitingObservational study
Endoscopic Sleeve Gastroplasty (ESG) Prospective Trial for Obesity (EGO-Trial)
Obesity
Active, not recruitingPhase 4
Effects of Sequential Therapy With Mexidol® (Intravenous) and Mexidol® FORTE 250 (Oral) on Functional Brain Activity Assessed by Functional Magnetic Resonance Imaging and Biochemical Parameters in Patients With Chronic Cerebral Ischemia: A Comparison of Patients With and Without Metabolic Disorders
Metabolic Abnormalities, Obesity & Overweight
Recruiting
Exercise Training and Vitamin D Metabolism
Obesity & Overweight, Vitamin D
Recruiting
Metabolic Health, Bones and Nuts During Weight Loss in Adults
Weight Loss, Bone Density
Active, not recruiting
Effect of Probiotics on Insulin Sensitivity in Overweight and Obese Pregnancy
Obesity & Overweight, Gestational Diabetes Mellitus (GDM)
Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing Calorie information manipulation and Serving size manipulation in people with Obesity and Overweight and Alcohol, run by University of Liverpool at 1 site in United Kingdom.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 19 Feb 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United Kingdom. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Alcohol units (time frame: Duration of the evening (approximately 3 hours and 15 minutes)). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Feb 2026.