Yes it can test the time the tip of a hair was emerging from your scalp.
yes they do not actually take the root it is not pulled it is cut, a hair test is a hair test . you can see actual hair test collection on you tube search Hair Collection for Drug Testing
Yes, doing a hair drug test they are going back Months, and can even test up to a year.
Hair drug tests can go back seven years. It is not against the law to ask how far back they test before you submit to the test
Yes.
Yes, It will. Hair drug test can trace back up to 3 months of drug history.
approximately detection time for hair drug test is 90 days , longer if they use body hair
Yes, for two months prior to your drug test, instead of doing drugs, eat a pickle. You'll pass your test. Shave your head if it is a hair test.
hair drug tests will show all drugs that you have taken as far back as 7 years. they test the hair folical.
it only take 3 months
No, they look back three MONTHS on a hair test but they can look back as far as your hair will let them.
Generally yes. If they try to use hair longer the test results are not considered very accurate after 90 days (3 months).
For as long as you have had the hair. If you haven't had a hair cut in three months and did drugs 2 1/2 months ago, the proof will be there.Hair drug testing is one of the important techniques to find presence of drug. Another drug testing includes blood, saliva, urine test etc