[southernplaces7]

>And avoiding putting stuff in your body that makes your immune system react like air pollution, microplastics,

Good luck avoiding either of those. For the first one, if you live in a heavily industrialized or urban area and can't just leave for X reasons, should you perhaps breathe less?

As for microplastics, from all I've read about them, they're now in nearly everything and many modern humans who haven't spent their lives living and eating/drinking entirely off the land in the deep remote country are unavoidably saturated with them to the point where (need to find the source again) the average modern adult human in the developed world has something like a teaspoon worth of microplastic inside their body. They've become essentially impossible to avoid if you eat or consume any modern food item.