Does K2 Show Up On A Drug Test? Can It Be Detected?

Jordan Barnett | Masters in Chemical Engineering
Jordan Barnett | Masters in Chemical Engineering

Over 15 years of experience dodging drug tests.

Does K2 Show Up On A Drug Test?

Yes – K2 will show up on most modern drug tests. 

Also known as Spice, K2 is a synthetic cannabinoid that mimics the properties of THC that you can find in actual marijuana. While the ingredients of synthetic cannabinoids differ from actual marijuana, you can still test positive for drug tests.

Thankfully there is a solution! Here’s everything you need to know about K2, drug tests, and how to beat them.

a test being conducted in the lab

Why Can You Test Positive For K2?

K2 isn’t actually one drug; it’s several combined to replicate the effects of marijuana. You can find Spice in tablets or edibles, making it one of the most versatile forms of synthetic cannabis.

So why can you still test positive for it? The number of drugs used in making synthetic cannabinoids actually increases your chances of testing positive for drug use. Unlike weed, synthetic cannabinoids will need more artificial compounds to replicate the effects of marijuana. And while they do this pretty well, synthetic cannabinoids go a little overboard.

How overboard? Your average synthetic cannabinoid is about two to three times more potent than marijuana. The additives they use make the effects kick in sooner, stay in your body longer, and are more difficult to remove. Spice, in particular, has a long detection time. The drug can stay in your body for a week, and the toxins from processing Spice can linger for a month.

How Drug Tests Fit Into All This

Synthetic cannabis aside, drug testing will often check for different substances in the human body. The reason most people will test positive for K2 is that it’s not the ONLY synthetic marijuana out there. Testing facilities have caught on to the fact that people are using synthetic cannabinoids to pass drug testing, and they’ve upgraded their tech to catch people who use it.

That’s not even counting the many types of drug tests that they can throw at you. Between hair follicle tests, urine tests, and saliva swabs – the chances of you getting away using synthetic cannabinoids undetected are slim. Authorities have already added synthetic cannabinoids to their list of drugs to watch out for, so you have to be very careful if you’re ever called in for testing.

Spice has a long detection window compared to other drugs – up to 72 hours in human urine and two months in human hair. So if you want to keep using Spice, you need something to fool these tests.

Using Synthetic Cannabinoids Under The Radar

There are three ways that companies will check for synthetic cannabinoids: a urine test, a saliva swab, and hair follicle test. Here are the things that you can use to beat them:

The Urine Test

The best product you can use for bluffing this test is fake urine. Since most urine tests will check for the composition of your pee, you just have to swap your sample with synthetic urine for the best result!

The great thing about using synthetic urine is that it requires almost no time to prep at all. Both men and women can use it, and they can fool any kind of urine test. Our recommendation would be Clear Choice Sub-Solution; the leading brand in synthetic urine products and trusted by thousands of users around the United States.

To find out more about Clear Choice, you can check out our comprehensive review and buyer’s guide: Best Synthetic Urine.

For Saliva Swabs

A saliva test sample has a lower detection rate than urine tests, but heavy drugs like Spice can tip the scales against you. If you want to come up clean, you can use Toxin Rid Rescue Wash.

A swill-and-spit formula, Rescue Wash helps mask the trace of synthetic cannabinoids in your mouth for up to an hour and a half before your test. It works for most drugs aside from Spice and doesn’t have any side effects when you use it.

To learn more about Toxin Rid Rescue Wash, read our guide on How To Pass A Mouth Swab Drug Test.

For Hair Follicle Tests

Hair follicle tests have historically been the most difficult kind of drug testing to fool. Drugs like synthetic cannabis and K2 burrow deep inside the core of the follicle. You can’t dye it, hide it, or mask it – and cutting your hair is a huge red flag right before a test that’s supposed to examine it.

If that’s what you’re facing, then get yourself a bottle of Old Style Aloe Toxin Rid Shampoo. It’s a specially-designed hair cleanser that can remove toxins as stubborn as K2 from your head, while leaving it intact and undamaged in the process.

To see how Old Style Aloe Toxin Rid works, visit our review on the Best Hair Follicle Detox Shampoo.


Using substances like synthetic cannabinoids can land you in a lot of trouble if the wrong people find out. Even if it isn’t made of actual marijuana, the substances in it can trigger a positive on most drug tests.

Luckily, the products above can help you beat any test that comes your way. With a little practice and the right supply, you should be prepared for anything!