DearCustomer There are not really any foods, per se, that I know of that will interfere with or give false positives to THC (pot) urine testing. There are some medications, over-the-counter and prescriptive, that can lead to false positives in PRELIMINARY urine drug screens. These include:

• Ibuprofen
• Naproxyn
• Dronabinol
• Efavirenz
• Hemp seed oil

A responsible laboratory will then go on to conduct confirmatory testing, at an increased expense, that will not likely have false positives for THC (pot). THC is detectable in the urine in people who have used lightly within the past 7 to 10 days, and up to a month in chronic moderate-to-heavy users.

The questions that you will need to find out are:

1. Did the lab go on and conduct the additional confirmatory test in light of the fact that ibuprofen, naproxyn, dronabinol, efavirenz, and hemp seed oil can cause false positives?
2. Was you son around any heavy use of pot, among friends or in smokey areas where pot was being used, where second significant exposure could have been encountered ... although, this would also be a violation of probation?

Kindest Regards,
XXXXX XXXXX, MD