The phrase "known toxin" refers to a substance or substance that has been identified and proven to be harmful or poisonous to living organisms. Full definition
But sometimes you can get too much of a good thing: Hundreds of known toxins from the environment can mimic estrogen and lead to excess estrogen pollution in the body. (mindbodygreen.com)
Researchers have now found through various studies that the average individual living today has at least 700 known toxins in their body. (drjockers.com)