Tell them you use LEGAL Hempseed Oil as a Food suppliment and because you consume large amounts in your diet you might test positive to THC,if your going to fail (I'll assume you will)you might confuse these narco-terrorists if YOU take the initiative and screw with THEIR brains instead,don't blame me if it doesn't work,but it should as this has been proven in a US court !!!
ps have empty bottles as proof.