Understanding ppm vs. ppb vs. percent — what do the terms “parts per million,” and “parts per billion” mean?
How soon after exposure is Lead detectable in my child’s blood? What is the “half-life” of Lead in the bloodstream? How long does Lead stay in the body?
But is this dish or toy or lamp or vitamin or piece of jewelry (or Tibetan brass singing bowl!) ACTUALLY going to poison me? And how would that happen, exactly?
