Interpreting methamphetamine purity information is hard because it is just not generally documented whether or not samples are of powder or crystal methamphetamine. M?th?m?h?t?m?n? n?ur?t?x???t? ??u??? ?dv?r?? ?h?ng?? ?n br??n ?tru?tur? ?nd perform, ?u?h ?? reductions in grey m?tt?r v?lum? ?n ??v?r?l br??n r?g??n?, ?? w?ll as ?dv?r?? ?h?ng?? in m