Abstract
Background: Most studies on influencer marketing techniques have focused on the promotion of unhealthy foods whereas little is known about the promotion of healthier foods. The present experimental study investigated whether a popular real versus fictitious social influencer is more successful in promoting healthy food products. In addition, we examined the role of parasocial interaction as an underlying mechanism of healthy food product endorsement. Methods: We used a randomized between-subject design with 154 participants (age: 24.0 years). Viewers’ product attitude and purchase intention were tested after exposure to an Instagram post by a popular social influencer (n = 77) or fictitious social influencer (n= 77).Results: Results showed that parasocial interaction mediated the relation between the type of social influencer and product attitude as well as purchase intention. Parasocial interaction was higher for participants exposed to the popular influencer compared to the fictitious influencer, leading to higher healthy food brand attitude and purchase intentions. Discussion: The findings showed that it is crucial for influencers to establish a warm personal relationship and connection with the their followers when promoting a healthy product successfully. We suggest that the promotion of healthy foods could be more successful in public health when using popular social influencers.
Promoting healthy foods in the new digital era: An experimental study on the effect of a popular versus fictitious ‘Insta-influencer’ on brand attitude and purchase intentions