The effect of a One Health message intervention on willingness to pay for antibiotic-free animal foods: A randomized controlled trial among Chinese college students

Routine use of antibiotics in livestock for prophylactic purposes is a main driver of antimicrobial resistance, posing a significant threat to the health of humans, animals, and the environment. Ways to motivate farmers to voluntarily reduce antibiotics use need to be explored. Promoting antibiotic-free animal foods is one of the promising strategies. A three-arm double-blind randomized controlled trial was conducted online to explore the impact of a One Health message intervention on Chinese college students' willingness to pay for antibiotic-free animal foods. A total of 389 individuals participated in this study and were randomly assigned to one of the One Health message group, the food nutrition and safety message group, and the no message group. Each participant read a message from the corresponding group and answered a self-report questionnaire. Participants' willingness to pay (WTP) and willingness to buy (WTB) for antibiotic-free pork, eggs, and milk were measured before and after viewing the One Health message, and the results were compared to the other two groups using the Kruskal-Wallis rank sum test and the Bonferroni correction. In the One Health message group, 30.2% (39/129) reported improved WTP for all three foods, compared to 6.2% (8/130) and 13.6% (17/125) in the food nutrition and safety message group and the no message group, respectively. The One Health message intervention had a significant effect on increasing participants' WTP (p < 0.001) and WTB (p < 0.05) for antibiotic-free pork, eggs, and milk. The One Health message intervention is effective in raising participants' WTP for antibiotic-free animal foods. It is hopeful to motivate farmers and producers to voluntarily reduce prophylactic antibiotic use through market demand and consumer choice, leading to a potential decrease in total antibiotics use in livestock. Additionally, integrated approaches based on One Health principles need to be found in the future.