To avoid cancer really, besides avoidance of toxins, you also have to boost the immune system: eat tons of vitamins and have your protein levels filled, because the white cells are made of proteins, and you need alot of those little soldiers to fight the scourge.
A reduction in stress is also highly recommended.
So far, the medical community is unable to prove 100% convincingly that processed meat causes cancer. There has been a few studies showing so, but their reliability has been questioned. And so far I haven't seen any study linking the intake of processed food with the increased incidence of liver disease, autism, or mental disorders.
You dont need any study, its just common sense.
Processed meat is made of rotten chicken or rotten pig meat, that is expired, so it's lowest cost (usually for poor people)
They irradiate the meat through a powerful UV light to remove the bacteria (radiated food), then they mix it with chemicals, and then create your average sausage or baloney.
Yes this is how it is created, from rotten food that is processed and sterilized biologically.
That is why it's cheap, and that is why poor people buy this. And that is why poor people get the most illnesses.