In 1985 a Federal District Court tried a case to determine the accuracy and reliability of hair analysis. The judge deemed that hair analysis was a useful guide in the hands of a health care professional when used along with other relevant information during treatment where a chemical imbalance is suspected. In some instances hair analysis can even be used in criminal trials to determine if drugs were taken. Hair analysis provides evidence which stands up in Court and attorneys are using it as irrefutable evidence of either drug abuse or abstinence. All chemicals and minerals are deposited permanently within the hair shaft.
Employers can use hair analysis as a test to determine if employees are using drugs.
Hair analysis shows the extent of the habit, what drugs were used, and when the drugs were taken. Hair samples for analysis can be taken months or even years after the incident, providing there is sufficient length of hair. It is not possible for hair to be changed or substituted in any way, as a urine sample can be. Sophisticated drug users can substitute a bogus urine specimen unless collection is directly witnessed by a supervisor. When doing medical testing hair analysis shows the intracellular concentration of chemicals in the body.