Hair follicle drug test

Subject – Science and Tech

Context – Hair follicle test confirms drug use by Ragini, Sanjjanaa: Police

Concept –

A hair follicle drug test, also known as a hair drug test, screens for illicit drug use and the misuse of prescription medication.
During this test, a small amount of hair is removed from your head using scissors.
The sample is then analyzed for signs of drug use during the 90 days preceding the test.
While a urine drug screen can detect if you’ve used drugs in the last few days, a hair follicle drug test can detect drug use in the past 90 days.