There are services that accept small samples by mail (from anywhere) which they then test for a small fee and email you results. You can also buy reagent test k

There are services that accept small samples by mail (from anywhere) which they then test for a small fee and email you results. You can also buy reagent test kits online, though they are a bit less accurate than what the testing services use. There are also very simple methods for "washing" what you buy to increase purity and thus dose more accurately + reduce side effects.