As far as I am concerned, "leaky gut" a new illness is caused by the gmo products people consume every single day in their processed food. All is high in the chemical pesticide "round up." This pesticide kills bugs by exploding their stomachs.
This just got added to the us food supply in the late 1980's. Hmm...
Hopefully it will soon by outlawed and is not allowed in many countries already. I'm glad I live in one of them now. But the damage is done for many people and they pay the price. But they still eat it and so the cycle carries on.
Germany just outlawed it, but our almost 3rd-world N. American continent just keeps poisoning its people!