Does HHC show up in a drug test?

Hexahydrocannabinol (HHC) has emerged in the cannabis world as a controversial alternative, especially when it comes to drug testing. Similar to the well-known THC but with a legal status that has been somewhat ambiguous until recently, it raises a key question: does HHC show up in a drug test? At Growbarato.net we’ve done the research to explore whether current drug tests can detect it, what the legal status is in Spain as of 2025, and what is currently known about its use.

What Is HHC?

HHC is a cannabinoid that, although naturally found in trace amounts in cannabis seeds, is mainly produced through a key process: hydrogenation. This chemical technique involves adding hydrogen to CBD, and sometimes to THC, converting them into HHC. Thanks to this modification, the resulting molecule is more stable and longer-lasting than THC.

The chemical structure of HHC is very similar to Delta-9 THC, which is the main compound responsible for the psychoactive effects of cannabis. However, hydrogenation introduces important changes that affect both its potency and the way it interacts with the endocannabinoid system. For this reason, HHC is generally experienced as less psychoactive, falling somewhere between non-psychoactive CBD and more potent THC.

Does HHC show up in a drug test?

The most common drug tests (urine, blood, saliva) are primarily designed to detect THC and its “footprints”—that is, its metabolites. The issue is that HHC is a different compound, and standard testing methods don’t always identify it directly. However, science is advancing, and there are now more specific methods capable of detecting HHC or its own metabolites.

HHC traces: metabolites and how long they stay in your system

Just like THC, HHC is metabolized by the body, creating residual compounds known as metabolites, such as 11-OH-HHC and HHC-COOH (which are the ones typically targeted in detection tests). In urine, these traces can remain for extended periods—up to a month in frequent users—whereas in blood and saliva, the detection window is shorter. It’s important to remember that detection times vary significantly from person to person.

Moreover, due to the chemical similarities between HHC and THC, there’s a chance that a standard THC test may give a “false positive” result if you’ve consumed HHC. This happens because the metabolites are similar and can confuse the test. That’s why HHC may show up on a drug test in some cases.

However, there is still no standard protocol for testing specifically for HHC. More advanced and accessible testing methods are needed for accurate detection.

What happens if you test positive for HHC?

A positive result on a drug test can lead to serious consequences, especially in legal or workplace settings. Most drug tests are currently designed to detect THC and its metabolites. However, because of the structural similarity between HHC and THC, there is a chance that HHC could trigger a positive result on a test designed to detect THC, leading to a false positive.

This confusion could result in legal issues, job-related penalties, or even termination, depending on the policies of each organization. Therefore, the uncertainty about how the body metabolizes HHC and how it interacts with drug tests is an important factor for users to consider.

Legal status of HHC in the United States

As of 2025, the legal status of HHC in the United States remains complex and varies by state. On a federal level, HHC is not explicitly listed as a controlled substance, which has allowed it to be sold in many parts of the country under the 2018 Farm Bill—provided it is derived from hemp and contains less than 0.3% Delta-9 THC.

However, several states have started to regulate or ban HHC due to safety concerns and its psychoactive potential. For example, states like Colorado, New York, and California have moved to restrict or prohibit its sale, especially in the form of vapes or edibles, citing a lack of research and potential health risks.

Do you have any experience with HHC or questions about drug testing? Drop your thoughts in the comments below!