This study tests the effects of a self-affirmation manipulation on (i) acceptance of a health message detailing the risks of alcohol consumption, (ii) engagement with the health message and (iii) alcohol consumption at 7-day follow-up. Half of the participants complete a self-affirmation manipulation, where they reflect on their most important values, whereas the other half complete a control equivalent, where they reflect on their least important values. Immediately post-intervention, all participants then receive information about the risks of alcohol consumption and complete measures of message acceptance and engagement with the materials. Seven days after intervention, participants self-report their alcohol consumption in the previous 7 days.