Hemp seed oil, kidney disease, diabetes, liver disease and riboflavin, or B2, are also thought to be capable of causing a false positive result on a drug
screen for marijuana
. Bring all medication bottle's with you.
It was once said that ibuprofen, Orudis KT, Advil, Motrin and Aleve, were once thought to cause false positive readings for marijuana. But this is no longer the case i guess from what i was reading on the internet ???
At one time i took urine test's twice a week for 2 years. The most common problem i would have in my testing was the THC line would some time's just barely show up.
Make sure that your testing instructor is washing his/her hands. Is waiting the desired time for the test to come in. Is following all proper procedures related to the said test. Each test should have a booklet or pamphlet to describe testing policy. Make sure you do not consume any beverages or food from other people ""You Never Know"..
I would also like to add that prior to your testing make sure you drink some water. Piss a few time's prior to the test. This will make sure that you have gotten rid of some of the toxins in your body. These test's are pretty accurate ""Depending on the company that makes them"".
I would also question the validity of the company that make's the test's. Maybe its some sub par testing company. who knows ??
Hope some of this info help's. I may decide to add stuff later if i think of other things.