​The Core Discovery: Researchers Michal Misiak (University of Wroclaw) and Petr Turecek (Charles University) used mathematical modeling to look at the human body purely as a food source, weighing the caloric benefits against the hidden biological costs. They found that long-term cannibalism inevitably leads to population collapse due to severe disease outbreaks.

So, basically they found that because you're eating the same species, there's a higher probability of dangerous pathogens cross-contaminating and causing diseases.

I'm not convinced on the study because proper handling of the human meat could eliminate this risk. For all we know eating humans is beneficial if this disease issue is controlled for.

This study is pretty much a joke.