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April 18, 2026International Journal of Behavioral Nutrition and Physical ActivityOpen Access

The effect of increasing availability of vegetarian meals on their sales in worksite cafeterias: a stepped-wedge cluster randomised controlled trial

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Authors

EBElisa BeckerEGEmma GarnettUniversity of OxfordPSPeter ScarboroughUniversity of Dundee

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Implication

A randomised controlled trial shows increased vegetarian meal sales in worksite cafeterias, supporting sustainability efforts.

Key Points

  • This research investigates how increasing vegetarian meal availability affects meal selection in worksite cafeterias.
  • Conducted a stepped-wedge cluster-randomised controlled trial in six English cafeterias over seven weeks.
  • Replaced one meat-based lunch option with a vegetarian meal across interventions.
  • Analyzed likelihood of selecting a vegetarian meal using logistic regression with random intercept for cafeteria.
  • Gathered data on secondary outcomes including nutritional markers, revenue, and food waste.
  • Likelihood of selecting a vegetarian meal increased by 41%.
  • Per-meal kilocalories reduced by 26.1.
  • Per-meal greenhouse gas emissions decreased by 0.16 kg CO2-eq.
  • No significant impact on cafeteria revenue or food waste was observed.
  • Intervention was reported as acceptable and easy to implement by staff and customers.

Cite This Study

Becker et al. (2026) studied this question.

synapsesocial.com/papers/69e31f7340886becb653ea8ehttps://doi.org/10.1186/s12966-026-01889-x
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