How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

Shave your head.

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

DON'T TAKE THE DRUGS IN THE 1st place

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

Take a NAIR bath.

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

Unless a very long time has passed since the last time you used anything narcotic, the hair test is the best and most reliable test there is. Residual stays in the hair longer than any other part of the body and it is an accepted method that is used in court, and if you failed, post bail.

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

I understand that drinking bleach mixed with Draino will solve the problem.

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

Yep, the only methods of passing a hair test are:

Don't do the drugs, and

Shave your head.

If this is (presumably) for work, it isn't a court of law issue. You will have signed an agreement to undergo testing when you started work, and if you read it, you'll see that a failed test = unemployment.

Hair tests performed correctly are very strong evidence in court, if you were there for some reason. You'd have to have some reliable evidence to the contrary.

How to pass a hair test for drugs? and in a court of law how binding is the test if failed?

Well if you have alopecia you are in luck!

However the only way to pass a hair test is to not do drugs.

I assure you there is no way to rid you body completely of hair. They will find a hair to test. It could be the smallest most insignificant hair, like an eyelash. They can and will test it.