How much hair is needed for a hair drug test?

Answer The standard follicle drug test requires at least 60 mg of hair, which generally equals anywhere from 90 to 120 strands, depending on how thick or coarse the hairs are.Source:Omega Laboratories: Fo... Read More »

Top Q&A For: How much hair is needed for a hair drug test

Can dyeing your hair make a postive drug hair test negative ?

No. And nothing out there will "mask" it, either. Don't waste your money.

What is a hair drug test?

A hair drug test uses a hair sample to test for drugs. Most hair drug tests measure marijuana, cocaine, opiates, phencyclidine and methamphetamine and can detect drug use from up to 90 days ago.Sou... Read More »

How to Test Hair for Drug Use?

Medical experts are able to test hair for drug use because the bloodstream feeds hair growth. When a person ingests a drug, traces of the substance may appear in a hair sample. To test hair, expert... Read More »

How far back does a hair drug test go?

A hair drug test can detect drug use as far back as 90 days from the date of the test. Hair-sample analysis can detect the following types of drug: cocaine, marijuana, opiates, methamphetamine and ... Read More »