We use 2 special test vials. We add only a little of grinded pill. The initial color change in test vial A is green getting darker green. The initial color in vial test 2 is red getting darker red. If you pill contains vitamins, proteins as fillers the test will not work. The filler has to be neutral like corn starch for the test to work. Under 365 nm UV light you will see dark green in both vials. See the instruction for pictures