I have consumed hemp as a cereal for many many years and never failed a drug test. Hemp cereal is sold at Publix grocery stores. I consume it as a food source. My understanding is hemp is a different plant than MJ. My job required unannounced beforehand drug tests and never failed a drug test eating hemp. Just saying. Maybe, I was just lucky.
One morning I had hemp cereal for breakfast and the same morning had a drug test. Passed with flying colors.