At what point does eating boogers become harmful to your body?

You want my honest-to-God opinion? (I can't believe I'm answering this) First, it's important to recognize that many non-human animals engage in the practice of booger eating, including pretty much all primate species, where it's a common grooming behavior. read more

Napper's theory does have some skeptics, however. Dr. William Schaffner of Vanderbilt University points out that we swallow nasal secretions all the time, especially when we sleep, so eating our boogers is unlikely to offer any more immune system strength [source: Lupkin]. read more

A biochemist believes that eating boogers helps introduce pathogens from the environment to your immune system, resulting in the build-up of natural defenses. A biochemist believes that eating boogers helps introduce pathogens from the environment to your immune system, resulting in the build-up of natural defenses. read more