What is the Detection Window for Marijuana in Drug Tests?

The detection window for marijuana in drug tests can vary significantly based on several factors. Understanding these factors can help individuals better understand the potential for a positive drug test result.

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Duration of Detection

Marijuana can be detected in urine, blood, saliva, and hair for different periods. Generally, it takes about 3-30 days for THC to be detectable in urine after last use. In the case of saliva tests, detection can range from 1-7 days, and in hair tests, it can remain detectable for up to 90 days depending on hair length.

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Factors Influencing Detection

Several factors can influence the detection window, including:

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Testing Methods

The method of testing also plays a role. Urine tests are the most common, but saliva and hair tests can also detect THC. Additionally, blood tests can detect recent use but are less common.