Collect the urine sample first thing in the morning, prior to consuming liquids.Notify your doctor of any medications that may interfere with drug test results.To get the most accurate results on your test, make sure to: Since CBD, Delta products or other synthetic/THC alternatives have low amounts of the drug in them, they may cause an individual to have THC in their system below the ng/mL testing level, causing a faint T line.Īlthough a faint line on a drug test indicates a negative (clean) test result, it may not be accurate if detox/masking agents or a diluted urine sample was used prior to testing. Use of CBD or Delta ProductsĪs mentioned previously in the article, the presence of THC below the test detection level can cause a faint T line on a drug test. The masking products cause frequent urination, which flushes the drug out of the person’s system. This is due to the urine being diluted or because the test result is false negative (clean). Use of Detox Agentsĭetoxes/cleansing agents will likely cause a faint line next to the T. It is recommended to use the first urine sample of the day for the most accurate test results. Diluted Urineĭiluting the urine may come in the form of adding water to the urine sample itself or if an individual drinks an abnormal amount of water before testing. However there still may be a small trace in the urine sample causing a faint line. There is not enough presence of a drug in the system to trigger a positive result. Low Presence of a Drug Below the Detection Level Therefore, in the case of a negative (clean) test result, the T line will be darker on a Methamphetamine test than the THC 15 ng/mL test. As such, a kit with a low detection level (THC 15 ng/mL, COC 150 ng/mL) will most likely show a faint line at the T (test) line.įor example, the THC 15 ng/mL detection is at a much lower level than the cut off for Methamphetamine at 1000 ng/mL. The fainter the line is, the lower the cutoff threshold. Ideally, the strip should be dipped into the specimen for approximately 30 seconds or until the C (control) line appears. Insufficient Testing TimeĪ faint line may occur if the strip is not left in the urine sample for the recommended time. Although a faint line indicates that the urine sample is negative (clean) for the drug being tested, there are some factors that can lead to the line being faint: 1.
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