Salt Warning Label Restaurant Study

University of Liverpool

Status: Completed

Conditions: Food Selection

Treatments: Behavioral: Salt warning label

Study type: Interventional

Funder types: Other

Identifiers

NCT06458270

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Details and patient eligibility

About

This between-subjects randomised controlled trial aims to test the effect of a menu featuring salt warning labels on perceived message effectiveness relative to a menu with no labels in a real-world restaurant environment. The study will also act as a pilot experiment for examining the impact of the salt warning label on food choice and subsequent salt intake in real-world conditions.

Primary objectives:

• To measure the PME of a menu featuring salt warning labels relative to a menu with no labels
• To measure label awareness, perceived knowledge gain, and perceived influence of the label on food choice

Secondary objectives:

• To identify whether there is an effect of the salt warning label on:

  • Food choice (label/no label)
  • Total salt selected
  • Total salt intake

• To examine support for the introduction of a salt warning label policy in the UK

Enrollment: 465 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Inclusion Criteria:

• Are a UK resident
• Are aged 18 years and above
• Are fluent in English
• Eat an out-of-home meal at least once a month on average
• Have no dietary allergies
• Are not vegan

Trial design

Primary purpose: Other

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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465 participants in 2 patient groups

Label group

Experimental group

Description:

Participants will receive a manipulated restaurant menu featuring salt warning labels next to menu items that are high in salt.

Treatment:

Behavioral: Salt warning label

Control group (no label)

No Intervention group

Description:

Participants will receive a standard restaurant menu (no labels).