well what i was able to find is different than what i found a few years ago
Q: What time period does a hair drug test cover?
Hair growth rates vary; typically, head hair grows at an average of one-half inch per month. Therefore, a 1.5 inch hair sample detects drug use up to 90 days prior to testing.1
nd a few years ago .
http://www.ipassedmydrugtest.com/hair_drug_test_FAQ.asp longer the hair longer they can go back .also
:
Can body hair be drug tested like hair from the head?
Body hair can be drug tested just as hair from the head. The growth rates for body are considerably slower than the hair from your head. Most body hair is replaced in about one year. It is challenging to precisely represent the time period of a standard screen with body hair so substances may be detected in body hair for up to 1 year after the substance left the blood stream. so what you might of done 3 months ago while on vacation will be used against you
What if I am almost bald or have no hair?
Hair can be collected from several head and/or body locations (excluding pubic areas) and combined to obtain the required amount of hair. In the rare case where no hair is collectable, complete urine/adulteration testing may be utilized.