The impression I'm starting to get is that the dealers sometimes fail to mix properly when cutting the product. This means that one batch can create doses with

The impression I'm starting to get is that the dealers sometimes fail to mix properly when cutting the product. This means that one batch can create doses with widely varying concentrations. Then you get cases where one distributor dilutes their product so much that their customers get used to taking very large amounts to get a high. Then one of those customers switches to another supplier with a "more normal" concentration and unwittingly overdoses. Then there's the people that develop a tolerance to the drug over time, and keep trying higher and higher doses to get the same high. And all of that is before you get into measuring errors and other mistakes caused by people doing complex chemistry without any formal training.