Hair Follicle Drug Test ing Is Accurate And A Sample Usually Covers 90 Days
Which 90 days is determined by the length of the hair follicle sample removed and where on that hair follicle the sample is tested. As your hair grows any drugs used are encased in your hair shaft. The longer the hair sample, the longer back in time an individual's drug history can be detected. Human hair grows an average of .5 inches per month, which equals 30 days of possible drug testing for every .5 inch. Testing laboratories generally require 1.5 inches for testing. However, if your hair is 12 inches long, your history can be detected back 24 months if the sample is tested from the end of that hair follicle.
Over-the Counter, prescription and/or controlled substances
are ingested.
Your body "metabolizes" this material and
trace amounts of these "metabolites" move through your blood stream and become entrapped the
hair follicles in amounts roughly proportional to the amount of the
substance ingested.
These
metabolites remain in the hair follicle as it
grows and cannot be removed without destroying the follicle. A hair drug
test not only can detect these metabolites, but it can also provide information of
quantity consumed and even the historic pattern of use. Your use can be detected for many months
or even years in the future under ideal circumstances.
A hair follicle sample can be obtained from any part of the body. This means shaving your head will not work as underarms, arms, legs, and even pubic hair can be used.
The hair follicle sample is removed and cut it into very small pieces. This sample is soaked in a solvent that causes some of the metabolites to go into suspension. The solution is then placed in a centrifuge and separated. The sample is then subjected to analysis, the results are read and a conclusion made.
