Board Thread:Speculation House/@comment-12698523-20130722170259/@comment-3387274-20130722171309

..... Inside the average human body IRL: Carbon (flammable), Calcium (poisonous), measures of Potasium and Sodium (REALY don't like water)...

Odds of reverse engineering any of these things out or finding their properties? negligable.

Even if Dust is somehow an ingredient in that world's humans, it's unlikely to be in any seperable form, and much less likely to be recognisable as dust.