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In the present study we tested a daily messaging intervention aimed at promoting the reduction of red and processed meat consumption (RPMC). We randomly allocated 180 young adults to three different message conditions. Participants in the informational condition read messages on the consequences of excessive RPMC on one's health and the environment. Participants in the emotional condition read messages eliciting anticipated regret for the consequences of excessive RPMC on one's health and the environment. Participants in the control condition read messages on the health and the environment consequences of sugar consumption. We sent messages through a chatbot every morning for two weeks. RPMC, attitude, intention, and anticipated regret regarding RPMC were measured three times: before the two-week messaging intervention (baseline), immediately after the intervention (post intervention …