Two randomized control trials examining human food choice (i.e. selection of high energy 'unhealthy' foods vs. selection of healthier foods). Interventions: In a between-subjects design, participants (recruitment stratified by socioeconomic position) made food choices (main dish, plus optional sides and desserts) in the absence vs. presence of menu energy labelling and from menus with baseline (10%) vs. increased availability (50%) of lower energy main dishes. Main outcome measures: Average energy content (kcal) of main dish chosen and average total energy content of all food ordered, including optional sides and desserts.

See attached protocol documents.

Inclusion Criteria:

• Participants were eligible to participate if they were US residents, aged of 18 or above, fluent in English, had access to a computer with an internet connection and had no dietary restrictions

Exclusion Criteria:

• See above.

Stratification Criteria:

- We aimed to recruit a sample stratified by gender (approx. 50/50) and highest educational qualification (approx. 40% high school or less, 60% above high school) to be broadly representative of US adults.

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