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Ive only heard this, I'm no expert - traceable in a hair test for up to 12 months, but eating it (eg cookies) is a lot less (like 14 days or something)

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13y ago
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14y ago

90 days, the best thing to do if you aren't sure is shave your head.

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11y ago

28 days

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Q: How long can cannabis be found in a hair test?
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Related questions

If you smoked cannabis once in sept how long will it show in your blood?

The official answer is 30 days, but I have known people to pass a urinalysis after a week. A hair test will show for longer. I am not certain about the blood test.


Can weed show up in a hair test?

Yes, cannabis use can be detected by a hair test.


How do you get rid of the cannabis in the system before a drug test?

Not possible. It's long lasting.


Can alcohol effectively be washed from the hair for a follicle test?

Alcohol is not found in a hair follicle test.


How do you prevent cannabis from showing in a Hair Strand test?

Use a shampoo called "Alo-rid" by the Brand Nexus. they also make a leave in treatment. It is used by swimmers to remove chlorine deposits and other minerals in their hair. I had hair down to my butt with daily cannabis use x 5 years, my boyfriend at the time had a similar history and long hair. We both passed! I have heard other similar situations from NORML. Good Luck!


Do doctors have to test for cannabis for it to show up?

Yes. Unless doctors specifically test for cannabis when they test urine, it will not show up.


How do you test for cannabis?

Urine.


Im 6ft1in 13stone will you pass hair folic test for cannabis i havant smoked for 31 days?

No dude.. your screwed it's in your hair until you GROW it out then cut it off..


In a normal blood test can cannabis be detected?

A blood test for illness is never going to be searching for the main stimulating organic substance found in female Cannabis plants, THC. Any blood test specifically searching for THC will detect the use of marijuana. cannabis is shown due to time periods witch varies to amount taken and how much taken


How long will amphetamines be detected in a hair analysis drug test?

As long as you have the hair you had when you did the speed.


What is cannabis saliva?

a drug test


Is there a blood test for cannabis?

Yes.