How do you know if the powder isnt the meth and the crystalline substance really the cut?
Alot of gear produced via the Nazi method will bee powdery (and pure) most of the "most common" cuts are crystalline in nature.
RP methods using excessive temps will also result in meth powder as well. (FYI)
Does SWIB smoke, snort or inject? Have you tried dissolving a portion of your gear in water? Crystalline niacinamide and inositol are water soluable so the water dissolving will not help but with MSM it WILL give you a better indication.
With inositol and niacinamide the results of smoking will give a WAXY substance when the flame is removed and LESS smoke will bee released. One might feel that he/she is having a hard time getting a hit, while the waxiness becomes more apparent rather then the shardy lines that one has grown accustomed to.
It could bee the results of two different batches mixed together as your "friend" got to the tail end of the 1st.
MSM will form a liquid pool that takes a little longer then usual to "crack back" We all know that the shit should crack back immediately upon removal of the flame.
As pseudo becomes more difficult to come by for the smaller operators, the gangs and purveyors of the nazi method may realize that they have no competition and take advantage of the situation and provide diet meth or meth lite as a main staple to users who have no other option.