Well, a vaccine is probably worse than food coloring...Which is probably worse than "natural flavors" (hint: they're not natural), which is probably worse than copious amount of pure cane sugar, which is probably worse than...

I guess it comes down to what you can afford to do in your own life and how much you're willing to obsess over it. In the end, we all have to eat, and most people can't afford the kind of nutrition they need to be truly healthy (which ends up being a matter of time and willpower, i.e. organic farming, not money).

But even then, the whole world is tainted with various chemicals from various disasters. We're all swimming in a giant, unflushed toilet, and maybe the best thing to do is to try to get to the edges instead of swimming in the middle.