Though digital platforms (e.g., social media) are often used to promote unhealthy, calorie-dense foods, the dynamics characterizing consumers' engagement with healthy nutrition-based content (e.g., as stimulated trough gamification) on these platforms remains tenuous, warranting further exploration. Addressing this gap, we deploy a qualitative field study and two experiments to show that challenge, a gamification mechanic that relies on rewarding incremental behavioral (e.g., food choice) improvements, shapes consumers' enjoyment of, and engagement with, digital healthy food-based content. Study 1 (n = 95) shows that challenge induces consumer enjoyment, boosting their engagement with healthy food-related digital content. Study 2 (n = 94) corroborates these findings by revealing a serial mediation effect of gamification-based challenge on consumers' enjoyment of, and engagement with, healthy food-based content. Extending Study 1, we also identify engagement's positive effect on consumers' app reuse intent. Moreover, we identify a moderating role of consumers' stage of change-based action (i.e., readiness to act on their health), which strengthens the association of gamification-based challenge/enjoyment. Overall, the findings substantiate gamification's role in boosting consumers' engagement with digital healthy food-based content. We conclude by deriving pertinent implications from our analyses.

While online communities may enhance firm performance, they commonly fail to retain members. To address this challenge, scholars and managers call for the use of gamification. However, despite gamification's growing use in online communities, insight into its effect on member experience and behaviours remain limited. We hypothesise that gamification affects member-perceived distributive and procedural justice. In experimental studies, we assess the impact of in-gamification perceived justice on member contributions. We find that while high in-gamification perceived procedural justice acts as a necessary prerequisite for member contributions, high distributive justice can reduce game-related uncertainty, thereby rendering gamified practices less fun, particularly for low-engaged community members that tend to value rewards. We add to the literature by (a) pinpointing the core role of perceived justice in the persistence of online communities, and (b) unveiling that high distributive justice can lead gamification to backfire in online communities by affecting member experience and contributions.