[roguecoder]

Most geographic clusters can be traced to environmental contamination, like lead or microplastics or car exhaust, or malnutrition, like why we have iodine in salt and add fluoride to water where it doesn't naturally occur.

You can grow whatever food you want, and if you want to drink maybe-deadly milk you can raise your own goats or cows. What you can't do is stochastically murder your customers.