12
Mar
Hair Follicle Drug Test How Far Back Can It Detect. Perhaps the biggest risk of all is that unlike a urinalysis that detects drug use in 1-4 days a hair drug test effectively tracks drug-use as far back as 3 months 90 days. A hair follicle drug test is the only drug test that can detect repeated drug use up to 90 days prior to the test. If head hair it too short body hair can be used. This drug test is also difficult to cheat adulterate or substitute.
If the tester takes 2 Inches the detention time is increased by 30 days. A hair drug test can detect all illicit drugs and some prescription drugs. If it is negative you are free from drug usage. For example a segment of head hair 15 inches from the scalp will represent up to 90 days of drug use. For an accurate hair screening a 15-inch sample is usually required. A hair screen is an examination that uses a small sample to detect any drugs in your system.
For an accurate hair screening a 15-inch sample is usually required.
The standard length of hair used for a drug test is only one and one-half inches. A sample of 40-50 hair strands is taken close to the scalp usually giving a drug detection of up to 90 days from 15 inches when taken to the laboratory for testing. Lets talk about how alcohol hair testing works some of its other applications and additional important details you need to know. Hair follicle drug test involves two methods of testing ELISA and Gas Chromatography. How far back can the hair follicle test go to detect drug use. If the hair was 1 12 inch 90 days and so on.