In my over 30 years living the nomad life I discovered that the closer we live in harmony with the self-reproducing environment the greater is our health.
The Bible's creation suggest man are to eat from seed producing plants that the seeds produce the plants earth-wide. It doesn't suggest cooking them and a it doesn't began to talk about cooking our foods until after the great flood, thus, man should eat their food fresh from where they grow -so grow your own as much as possible- which will build up their immune system and drink water from any source you see other animals drinking from for the same reason.
Before I went into the United Stated of Mexico in 1978 the word was "do not drink their water" but I had drank ground water from Florida all the way to Yellowknife, Northwest Territories, Canada and back across the U.S. so I drank their ground water without any discomfort. I had been eating many plants people don't consider food and ate many their they didn't and without discomfort, so living close to the environment is the healthiest way to live my experience proved.