Why people are always giving the advice" Shave your head" defies logic. I know some people are kidding but others actually think that this will work. If you had a urine test and you told them you don't have to go to the bathroom, do you think they will go "Well, ok then. You pass." Shaving your head and all your body hair but your eyebrows will result in 1 of 2 things. Automatic failure for refusal to give sample or some companies can shave part of your fingernail and get a sample that way.

The commercial link that was provided is a great example of false advertising. I have seen this website many times. First, they are trying to get you to buy a specific product so they make the other products look bad and really add a lot of false claims about their product. Second, a sample size of whta was it, 7 or 8 people, is not a scientifically statisically significant study. For something to have a statically significant result, it has to show results over a large sample size, typically in the thousands.