If u buy "gear" what's on market(and i guessingYou are) think that not more then
20% of your "gear" is the REAL GEAR
Depends from how the dealer usually you'll find probably coffeine, creatine.
Another factor is what acid had been used to create amphetamine salt. Best if its sulfiuric 6 then bioavailability is highest if was used ortofosforic its less aviable for your cells. If would be used citric acid you would be able to use table spoon to feel any kick.
That how I see it
all methods leading to create Afreebase molecule how it been treated and what's been used to dilute your GEAR depends how it workson you .
For me clear amf sulfate works same without influence of method