How Long Does Marijuana-THC Stay in Your Blood?

Although you’re not necessarily going to take a blood test for marijuana if you are aiming to get a job or your current employer is looking to test for drugs, but you will possibly have to take a blood test if you are looking for a new insurance company.

They use this test to determine how much you’ll have to spend on your monthly contributions.

Obviously, smoking the occasional joint here and there really isn’t such a big deal. It’s really not that dangerous either when you get right down to it.

But marijuana is an illegal drug still in the United States, or it is at least in many of the states in the US, so you still have to worry about your ability to pass a blood, saliva, hair, or urine test if you are going to be tested by your insurance company or an employer or anyone else for that matter.

What Factors Influence the Detection of Marijuana in Your Blood?

As you have probably figured out already, there are going to be a number of different factors that determine how long marijuana stays in your bloodstream.

To help you get a better understanding of the various factors that will have an effect, we will share their names and a brief explanation so that you can know what you’re up against if you have to take a blood test in the future.

The factors include the following:

  • Dosage size – marijuana will alter the amount of metabolites in your system, so the dosage size is important to determine how much of this is going to be affected. If you smoke large amounts of low-grade marijuana, the marijuana THC levels are going to be high. At the same time, if you smoke small amounts of pot with high grades of marijuana THC, it’s still going to show up as a large amount of THC in your bloodstream. So the quality of the pot definitely matters.
  • Chronic or acute marijuana usage – the length of time you’ve been smoking and how often you smoke are definitely going to be major factors that determine how long it will stay in your blood. As an acute smoker, you will smoke regularly but you’ve only been doing it for a short while. As a chronic pot user, you will smoke marijuana regularly for many years. The longer and more often you take this drug, the longer it’s going to take for it to clear out of your system when you finally stop.
  • How do you ingest marijuana? – If you smoke marijuana, the THC is going to leave your system a lot quicker and within a few hours when compared to edible marijuana. Believe it or not, the edible pot stays in your system much longer.

So How Long Will It Stay in My Blood?

On average, your THC levels will drop about 60% after you haven’t smoked pot for a few hours. But to have your blood completely clear of the THC and marijuana, it’s going to take at least 3 to 5 days.

Please keep this in mind if you are going to take a blood test for marijuana usage in the future.

Jake Hansen


Jake is a marijuana advocate and voice of the people who are for the legalization of marijuana. As the webmaster, all views, opinions, and reviews on this website are based on his personal experiences. He hopes to educate people as well as help them find the best methods to pass drug tests.

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