Years ago, there was a show about immunology on PBS.
One of the things they talked about was a group of hippy-types living in a commune in Va, I think.
Most of what they ate they grew themselves.
Once a week, they actually took some of the local garden dirt and sprinkled it on their salads.
And according to the reports, these people NEVER got sick. Never.
Problem is, I know enough about botany and biology and local fauna that I realize you could probably do this 100 times and be totally fine.
The 101st time you try it, you pick up some cootie that basically starts digesting YOU from the inside out!
I suspect that peoples who eat dirt know which dirt to eat and possibly prepare it somehow.
“The 101st time you try it, you pick up some cootie that basically starts digesting YOU from the inside out!”
Human parasitic nematodes.