Question: How do you know how many toxic chemicals your body has absorbed? And why would your body absorb something so bad for you?

Jess Bean answered on 21 Jun 2013:

You can test how many toxic chemicals are in your blood by testing your blood. There are scientific machines now that can find even tiny amounts of dangerous molecules! They can work out what toxic elements (like lead and arsenic), as well as bigger molecules (like drugs and alcohol), you have in your blood.
The problem with our bodies is that our skin cannot decide what it will let through and what it won’t. So if the thing is dangerous you can’t tell it not to get inside your body.