I had a nurse friend whose husband (not a nurse) had an accident at work. Both were in their mid 60's. They did a drug test on her husband as a result of the accident and he popped a positive. What the heck??? Neither of them or their families used Marijuana ever and were staunchly against it. It turned out that her husband was a voracious milk drinker and they purchased their milk directly from the farm. Believe it or not, the milk cows were put to graze pasture where it was discovered a hefty amount of the weed grew. It was determined he was getting his dose of Marijuana from the milk he was drinking. Crazy, huh? Just had to add this into the mix. True story!