The length of the hair is an important factor for drug testing hair. It can be .5" to 1.5" in length, to be legible for testing. For the earlier length, 120 shafts of hair are required but for the latter length, 70 to 80 strands are good enough. This is because the drug testing hair is conducted by pictogram weight.Have a look at Drug Tests In Bulk for more info on this.
People try and avert this test by shaving off their heads. Little do they know that the follicles work just as well? In the past years, there have been many law suits against drug testing hair. People from different ethnic groups have different type of hair structures. This can sometimes lead to false positives for people of African origin or for people from the Pacific islands. They test positive for marijuana, even without consuming it.
Dodging such tests for illegal drugs is becoming more and more improbable over time. There are various shampoos which claim to clear the scalp. They clean and clear the cuticle layer. Most of these shampoos do not have aloe in them but they have lots of detergent. Laboratories these days have extensive methods for drug testing hair. Trying to be over smart and to get away with it is highly unlikely.
Following are substances which can be tested with drug hair testing. These are marijuana, opiates, cocaine, phencyclidine and methamphetamine. The federal government of the United States mandates the hair drug test for the above five classes of the drugs. This test helps in the measurement of long term or lifelong heavy metal burden.
A Review on Hair Drug Testing
