Participant recruitment
Participants were required to be users of a food delivery platform and adults (18 years or older) living in the UK. Our study aimed to collect data from 9,000 participants in order to be powered to detect a 65 kcal reduction in total energy, with a standard deviation estimated at 550 kcal, 80% power, 5% significance level, and corrections for multiple comparisons. 65 kcal was determined based on findings from a previously conducted study [