Radiation & parasites are two issues I see having a profound effect on the human biome. I will expand on this post. For now, the simple acts of intermittent ingesting of diatomaceous earth (food grade) for intestinal bugs, followed by high level probiotics is a affordable and effective regime. In regards to radiation, food grade zeolite clay is known to be an effective way to absorb radiation internally. I take it right off the spoon followed by drinking sufficient water. This is a great start to these problems we all have in common. I include some liquid clorophyll for keeping blood flowing clean.