If a person has smoked cannabis how long does it stay in your bloodstream?

if a person has smoked blow and then later on they have a blood test where the test is speciffically designed to test for cannabis.how many days weeks or months is it before the test shows all clear.

Read the following extract from cannabis .com!

If you use marijuana
on rare occasions, your urine may be clean of metabolites in less than a
week. There is a common and strange phenomena that occurs with chronic
users. You would expect a chronic user to have the longest detection time
and the smallest chance of passing. This is not always the case. A
chronic user with a high tolerance will eliminate drugs quicker than an
occasional user. Chronic users have tested negative after a week long
binge. Lipid tissue also makes a huge difference. Skinny users not only
have a faster metabolism (usually), but also lack storage for THC
metabolites. Fat will cause a lag in excretion pattern, and lead to a
longer detection time.

As you can see ther is no hard and fast answer. Best just to leave testing as long as possible.

It will show up on tests for up to 31 days

72 hours max (and thats from a bloodtest)

can be upto 30 days. the hair test is worse though as it stays in your hair untill you cut it back before you had a toke.

Traces of cannabis will usually stay in a person's system for about a week. If you use it a lot, or have a lot in one session, it stays in the system longer. It's fat soluble, meaning that it lodges itself in the fat cells of the body, in the brain, the liver, and the kidneys. Consequently, a heavy cannabis smoker will find that it can be detected sometimes a month after use.

It varies from person to person but on average fifteen to twenty days.

28 days. and its in your hair sample for over six months. however, just because u test positive, doesnt automatically mean youre guilty... if you go to a party and someone else is spliffing, you do the secondary smoke thing.. and youre not guilty.

The Police told me 30 days for cannabis and 72 hours for heroin

thet reckon about 28 days but i dont know wether thats for blood or urine that it stays in the system, but if they dont smoke it regular it may leave the system a bit quicker,

I think it is around seven days

i think its 36 hours

its one month done it at college

Typically two weeks but can be as much as a month.

In your blood, providing you are eating and drinking normally, at the most, 72 hours.

20 to 30 days in your urine

indefinitely in your hair (until you cut it short)

Not long enough for me, mate.
Whatever the detectable trace levels period in your blood is, its nothing compared to your hair.
THC will always be detectable in hairs on your head. They do hair tests apparently. The cunning blighters.

For ever and ever! Until it rots your brain and you become a drooling, pleasure seeking zombie. Reefer Madness! Reefer Madness!

3 months on average. you can drink detox drinks and lots of cranberry juice to reduce this time though.

My 20yr old son told me that it stays in your system for about a month. He knows this because of his friends not passing drug tests they needed....to get into a construction company. I was extremely happy to know that my son had passed the test and that he was telling me the truth when he said he did not do any drugs... to bad for his friends tho. The following month, one of his friends that failed the first time, passed because he stayed clean.

So it was about a month. Good luck.

hey, its up to 3 months in blood and urine and it is in the folicles of your hair for a lot longer

it can be traced up to 42 days

28 days is the correct time limit for cannabis to be detected in the bloodstream.If a hair test is done the myth is that its there and traceable till you have your hair cut,its un proven.A hair test can show signs of cannabis for up to 3mths,although if this test is done they cannot prove the person has actually smoked dope,only that they have been in the vercinity of dope smoking within that period of time,regular hair washing helps with a medicated shampoo as this masks the substance..I personally smoke and have done daily for years,we suffer the in dignaty of dope tests at work,i must be lucky i aways seem to come back negative........

well i dont know how long it is for blood test.
but if you have to pee in a cup, its not that long; only abou 48-72 hours.
a hair test though,it will be in your hair until you next cut it off or it falls out.

around 60 days