Does bright yellow urine mean you failed a drug test?

no. bright yellow urine means you are dehydrated. which is a common symptom after you get high, that's why before a drug test u want to drink as many fluids as possible to flush through your system. which usually makes it clear. beer tends to work because it flushes your system quickly.

-I have never heard of it meaning you are dehydrated, but I know for a fact it is the vitamin b12 leaving your body that causes the urine to be bright yellow.