Reagent tests won't tell you if yr k has cuts necessarily unless they're cuts that the test tests for and present in huge quantities. It will just tell u that you have something that is probably mostly k. (the mandelin reagent does this). In my experience, ketamine is less frequently cut then other powder drugs for a few reasons--one, ketamine addicts aren't as common as heroin junkies, so ketamine users aren't desperate enough to just take any random shit that might be cut with baby laxatives or nestle powder and snort it. Two, pure ketamine that hasn't been crushed up normally comes in small crystals that are hard to emulate. I usually reagent test my k, but I also usually get it from sources that are reputable (all i can say without getting into sourcing). I've heard of k being cut with msg or salt or various salts sometimes, which mimics the crystalline appearance. I've heard this from friends who do and deal a lot of k but i've also read about it in journal articles or articles that i'll try and dig up for you. K should taste pretty bitter, u should learn to recognize ketamine eventually from enough experience with it. I'm not saying k isn't cut i'm just saying that relative to coke and h, getting actually close to 100 percent pure ketamine is more probable, in that it's actually possible and in my circles it's common.