Investigating the Effects of Calorie Information and Serving Size of Alcohol Products on Alcohol Consumption.

NCT07103967 | Completed

• 1 other identifier: AlcCal Real-world Study
• Study Type: interventional
• Target: 312
• Locations: 1 country
• Sites: 1

Brief 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. We also wish to see whether alcohol consumption levels are reduced when changing the serving sizes available to participants.

Conditions

Obesity and Overweight; Alcohol

Outcome Measures

Primary Outcomes (2)

• Alcohol units

  Amount of alcohol units consumed in the evening.

  Duration of the evening (approximately 3 hours and 15 minutes)

• Total calorie consumption

  The amount of calories consumed during the evening.

  Duration of the evening (approximately 3 hours and 15 minutes)

Secondary Outcomes (3)

• Perceived message effectiveness

  The day after the intervention

• Follow-up energy intake

  Immediately after the intervention

• Bar snack consumption (calories)

  Duration of the evening (approximately 3 hours and 15 minutes)

Study Arms (4)

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.

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.

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.

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.

Behavioral: Calorie information manipulation; Behavioral: Serving size manipulation

Interventions

Calorie information manipulation BEHAVIORAL

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.

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 manipulation BEHAVIORAL

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.

Calorie information absent, serving size reduced; Calorie information absent, serving size typical; Calorie information present, serving size reduced; Calorie information present, serving size typical

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• Consume alcohol on a regular basis (at least one UK unit per week)
• Be aged 18 or over

You may not qualify if:

• Have a current or previously diagnosed alcohol use disorder

Sponsors & Collaborators

• University of Liverpool: lead

Study Sites (1)

University of Liverpool

Liverpool, L83UH, United Kingdom

Location

MeSH Terms

Conditions

Obesity; Overweight

Condition Hierarchy (Ancestors)

Overnutrition; Nutrition Disorders; Nutritional and Metabolic Diseases; Body Weight; Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: July 29, 2025
• First Posted: August 5, 2025
• Study Start: July 30, 2025
• Primary Completion: December 6, 2025
• Study Completion: December 6, 2025
• Last Updated: February 19, 2026

Record last verified: 2025-07

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ANALYTIC CODE
• Time Frame: Data will be available after data collection has finished, this will be available indefinitely.

Locations

GB (1)