Approximately 3/4 an inch is needed for a hair drug test. over 1 inch is preferred. But you should be worried about hair for a drug test anyway. THC can show up in urine 30 days after usage. Plus hair tests cost thousands of dollars.
lots These tests require a sample of hair that is about 1-1 ½ inches long.
A hair test will show every drug you have used for the length of your hair.
No
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
alcohol does not show up on a hair follicle drug test. :)
take a sample of your hair
NO, in short hair test only test for the drugs that are in hair follicle, they do not test the quantity of the drug in the follicle. so the hair drug test will show you as being positive for amphetamines, but they can't determine how much amphetamines was used, so going from 20's to 30's will show up no different on a hair test.
Hair follicle testing can test for any and every drug there is. The drugs can be traced back some to two years since the last use of the drug.
Almost everyone just uses urine and sometimes blood. Rarely they will do hair test b/c of cost.
Yes and most of the time its a hair follicle test
Hair Test