Below we have listed some helpful information to help you get the most accurate results
with your test, as well as tidbits of knowledge.



How do I interpret my results?

For instructions on interpreting your results, refer to our Test Results page

What does a faint line next to the T mean?

Any colored line next to the T, even if faint, indicates a negative (clean) result. If you need assistance interpreting a test result, email a picture to customerservice@utestdrugtesting.com for confirmation. 

What is the accuracy of your tests?

Most Utest products have a 99% accuracy rate. For more information pertaining to the accuracy of our products, email customerservice@utestdrugtesting.com for a product insert. 

What metabolite does the THC test detect?

Tetrahydrocannabinol or 11-Nor-9-carboxy-Δ9-tetrahydrocannabinol; other acronyms are THCC, THCA and THCCOOH. 

What metabolites does the Cocaine test detect?


The C line is faint. Did the test work properly?

Yes. The presence of the C line indicates that enough urine has passed through the test to ensure an accurate result. The intensity/color of the C line has no bearing on the test result. 

The C and the T lines both showed up at the same time. Did the test work properly?

Yes. As long as the C line appears, the test worked properly.

The entire test strip turned red/purple. Is this normal?

Yes. As the urine migrates up the test strip, the strip may turn red/purple—this is normal. The dye will dry within 5 minutes of using the test and the C line will appear. 

What does ng/mL mean?

Nanograms per milliliter (ng/mL) is the unit of measurement used to indicate drug testing cut-off levels and quantitative test results from urine samples.

Do I need to use the first urine sample of the day?

Because the first urine of the morning is the most concentrated sample, it is the best to use. However, a urine sample can be used at any point during the day with a ÜTest product. 

How long will THC stay in my system?

There is no standard timeframe for detection because THC is a fat-soluble drug and body composition varies widely from person to person. While there is not a definitive answer, a general guidelines is that THC can stay in the system for 2 to 90+ days.

Contributing factors to how long THC stays in the system:

  • Individual metabolism
  • Frequency of use
  • Amount consumed
  • Potency/concentration of the product consumed

Metabolism factors:

  • BMI
  • Height
  • Weight
  • Age
  • Overall health
  • Medical history
  • Lifestyle
  • Physical activity level 
  • Hormonal imbalances
If I pass a ÜTest, will I also pass a lab test?

ÜTest uses the immunoassay method; the same standard screening methodology used in a lab. If you get a passing result from a ÜTest product, you should also pass a standard screening at a lab (as long as the urine sample prior to testing at home or at the lab is a natural urine sample free of detox/cleansers, adulterants, CBD, etc).

Gain the assurance you are looking for by ordering your ütest today.