why are you asking this dumb question?!
Lab require a sample of hair that is about 1.5inches (every .5 inches = 30 days back), anywhere from 90 to 120 strands, depending on how thick or coarse the hairs are.
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A hair sample will show any drug you have taken no matter how much of it within a 90 day period.
one strand,which can be tested to see what drugs you've used for the last 20 years
On a hair follicle, drugs will show up after 90 days of using the drug. However, it typically depends on the type of drug and the frequency of usage.
1 to 3 weeks depending on hair growth and metabolism....
very little the metabolites will diffuse into the hair from the sweat this is worse than the marker that grows into it. hair razor wash is the key
A pencil thickness collected from various places on the head.
Even the tiniest amount can show up.
Any
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None. Just finger prints. Perspective employers will drug test you.
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.
Hair Test
Yes and most of the time its a hair follicle test