How Long Does Weed Stay In Your Blood

Whether you need to pass a drug test for school, employment, or personal reasons, it is important to know how long THC will remain in your system. The answer to this question varies depending on the type of test you will take. The most common tests for THC are urine tests, saliva or mouth swab tests, blood tests, and hair tests.
1346267065970open_uri20111110_31937_1g75voa_jpg_leader-351x185For all of these tests, the length of time you test positive for THC will depend on how frequently you use weed, your body weight, and your level of activity. Frequent users can expect THC to remain in their system longer than those who only use marijuana occasionally. THC bonds with your fat cells, so those with higher body fat will test positive for longer than those with less fat. If you exercise more frequently, this also allows you to pass a drug test sooner than others.
THC in Urine:
For the average user, THC will appear in urine tests for 10 days after use. Occasional users will test positive for only 4-5 days. Heavy users can test positive for up to 30-60 days, depending on the frequency and amount of weed use.
THC in Saliva:
Saliva tests for THC have the shortest detection period. Regardless of the amount of THC in your system, a saliva test can only detect THC for up to 48 hours after use. Most tests are only able to detect THC for 24 hours after use.
THC in Hair:
Hair tests for THC are unique because the THC never leaves the hair once it grows out of the scalp. Hair grows at an averate rate of 1/2 inch per month, and many tests will use 1-2 inches of hair for their testing. In this case, any use over the past 2-4 months will be detected.
THC in Blood:
Blood tests will report high levels of THC in the first 8 hours after use, and most will continue to detect THC 24-48 hours after the last use. Chronic use of marijuana will lead to a positive test result up to 7 days after use.
How to Pass a Urine Test:
There are many home and store-bought remedies to pass a urine test. The most effective is drinking copious amounts of water before the test to dilute to urine. Store-bought kits can also allow a person to pass a urine test more easily.
How Long Other Chemicals Stay in the System:
dream-queen-351x185THC is not the only concern for many drug tests. Most modern tests will also test for alcohol, methamphetamine, cocaine, opiates, PCP, and heroin.
Alcohol remains in the system for less than 24 hours for all tests.
Methamphetamine well be present in blood and urine for 1-5 days, and will remain in the hair for months after use.
Cocaine, opiates, PCP, and heroin will be detected for 1-7 days in a blood or urine test. All of these drugs will be detected for months in a hair test.

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