Hair sample is considered as the best sample for the detection of drugs from suspected individual. Hair sample is given more importance because it can hold the drug metabolites for 90 days after drug ingestion. Drugs get metabolized into its principle components and are absorbed by hair follicle. Hair utilizes drug metabolites as the source of energy and continues to grow long. Hence hair retains the drug metabolites for long time and is helpful for detection of drug addiction in a suspected individual.

Hair drug testing is widely employed in the detection of marijuana. THC is the active ingredient present in the marijuana drug. Marijuana gets metabolized in to THC in blood and moves towards blood vessels and finally gets settled in the hair follicle. For the detection of THC drug, hair sample acts as the everlasting record.

Basically, a drug test involves splitting of hair in to pieces of length of 1 inch. Hair sample collected from scalp and puberty hair sample can be used for the testing process. Splitting of hair is followed by washing with suitable chemical solution in order to remove unwanted toxic material from the sample. Then it is processed with GC/MS in the lab producing the results.

Information on how to pass drug testing gives out lot of tips to people. Passing a hair follicle drug test can be done by washing the hair by detoxifier which is available in the market. Various kinds of detoxifier are available in market which is utilized based on the level of drug in the hair. This can be tested by home drug testing, followed by testing with detoxifier.

Passing hair drug test is supported by various anti drug solutions which are available in the form of shampoos and other liquids. Detoxifier helps pass a drug test.