Warning labels and tax on junk food tested in UK supermarket study
NCT ID NCT07339982
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tests whether putting warning labels on unhealthy foods and adding a 20% tax changes what people buy. Around 600 UK adults will shop in a simulated online Tesco store. Researchers will compare the nutritional quality of their orders across four groups: labels only, labels plus tax, current traffic-light labels plus tax, and a control group with no changes.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- What this could lead to
- If it works, this could show that simple labels and taxes help people choose healthier foods, which might guide future public health policies.
- What could go wrong
- This is a small, short-term study using a simulated online shop, not real-world behavior. Results may not reflect actual long-term shopping habits.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Online (UK-wide) - Qualtrics
RECRUITINGLiverpool, United Kingdom
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