[kilburn]

Wrong. 2000mg/Kg = 2g/Kg, two grams of the chemical per kilogram (1000g) of the subject. To give you an idea, that's 160g of chemical for an 80Kg human. Quite a lot, but nowhere near impossible to consume...

[4ad]

Actually it's just something between 0.8g and 8g, 160g is a safe limit, not the therapeutic dose.