In practice, most hair which is sent for analysis has been cosmetically treated in some way (bleached, permed etc.). It has been proven that FAEEs are (surprisingly) not significantly affected by such treatments (Hartwig et al., 2003a). FAEE concentrations in hair from other body sites can be interpreted in a similar fashion as scalp hair (Hartwig et al., 2003b).

HAIR TESTS: An ominous new technology is hair testing, which is supposed to detect drug use for months, or however long one's hair has been growing (Skinheads note: samples can be taken from any part of the body!). While hair tests are highly sensitive to cocaine, their sensitivity to pot is not well established. Not all employers who use hair tests check for marijuana. Hair testing is racially biased against Africans, being much more sensitive to thick, dark hair than to light, fine hair. Although the FDA and scientific community have been critical of hair testing, that hasn't stopped employers from using it. Hair tests may be influenced by shampoo: one test found hair treated with Head & Shoulders® (Fine/Oily), Neutrogena®, and Rave® displayed lower drug concentrations than with Pert® (Oily/Fine) or Prell® (Normal, Normal/Oily).

When passing drug tests for hair there is very little you can do in the way of preparation. If you want to know how to beat a drug test of this type your best bet is to use what is commonly referred to a 'hair follicle shampoo'
use google to find suppliers
for urine test you do not need to buy anything-women have an advantage over men-the secret is that the sample must be at body temp-get someone to pee for you and conceal it--u know where-it will retain body temp-a plastic test tube etc-although a condom is usually better -doubled up. and pretend that you are a drug user.use a hair pin to burst-u don't have to conceal this-stick it in your hair:rasta:
BIPOLAR2 Reviewed by BIPOLAR2 on . Hair Test Soon! Advice please! The last I smoked was 2 1/2 months ago. Before I quit I was a light smoker, several hits a week for a few months. I have read Jerry G's method and was wondering if I needed to go that drastic. I'm a girl with long hair and have to take my drug test soon, within the next week or so. Any advice would be greatly appreciated, this is for a great job offer. Rating: 5