Eat food, not too much, mostly plants.

Again, my limited experience seems to confirm the axiom.

The "food" here refers to whole foods. In particular, refined flour and white rice are not.
Most packaged foods that last forever are not. Most cheap meat from feedlots is not.

And yes, I have to _cook_ with raw ingredients. I accepted the "inconvenience"--
it's life and death, after all--but ended up enjoying cooking.