yes in that all drugs except THC will bind to the melanin of the hair so if for example a red head doesn't have the same melanin as a black haired person and it is the black and brown range that it binds to so the same amount can be given to a red head and a black haired person the black hair will show higher levels.
you mean a hair test? yes. because the test checks the inner part of the hair, all of it is born of the root. dye is on the outside only, surface area.
dying your hair wont help you pass a drug test of any type.
No.
I think it depends on what drug you are talking about. I don't think some drugs show up in your hair.
Amphetamines
Most likely.
you shouldn't take drugs ^weed isn't a drug. tis a gateway drug, but NOT a drug. drugs are man-made. weed is a plant. that some god blessed us with
hair drug tests will show all drugs that you have taken as far back as 7 years. they test the hair folical.
No. The drug or drugs are found in deep in the hair shafts and can not be removed. The shafts show what drug(s) have been taken over a period of time.
No, there is not. If you do drugs, you're going to have them show up on a drug test. Even your body hair is saturated with the drugs, so there's no way to get rid of it.
No, not specifically, but it can still show as a positive for other drugs that they do test for.
There are no magic potions that will let you do drugs and still pass a drug test. The only way not to fail a drug test is not to do the drugs ... or move to a state where it's legal.
It will show up on a hair test, but it shouldn't show up on a blood or urine test. drugs will show up on a hair test for possibly years.
It sure will--drugs bind themselves into your hair. The only way to get rid of it is to get your hair buzzed off.
Typically drug traces will stay in your hair for multiple years, It's found in your roots and until your hair grows out longer it will remain there.