How Long is Marijuana in Your System?

Smoking or using marijuana can help people with many conditions from pain to insomnia, anxiety, and more. One challenge people face is figuring out how long marijuana stays in your blood or urine, especially if drug testing is a regular part of the workplace environment. Even if it is legal that does not mean an employer will be happy to overlook a positive drug test. There may be many factors and reasons why weed shows up in blood and urine. Let’s take a look at some of the ins and outs of understanding the length of time marijuana stays in the system.

How Long Does Marijuana Stay in Your System

Times vary as to how long marijuana stays in the urine and blood. Dosage is one variable along with the frequency of use and potency. Cannabis is usually detectable in the body for up to 30 days. Cannabis detection windows depend on how much is smoked or ingested and how often. Higher doses and more frequent use are associated with longer detection times. One factor in determining how long it takes marijuana to leave your system is based on metabolites. Metabolites remain in the system long after the effects of weed wear off. The length of time it is detectable in the body depends on what type of drug test is also used. Urine testing is quite common along with hair and blood tests. 

How Long Does Marijuana Stay in Your Blood

Blood tests usually detect more recent cannabis use but generally the window is no longer than 12 hours from past use. Heavy users of cannabis or chronic daily use can have a window of up to 30 days. Chronic use increases the length of time it can be detected. Blood tests aren’t as common as workplace drug tests but they are used so it is helpful to know the detection window.

How Long Does Marijuana Stay in Your Urine

Urine testing may be used by an employer or another situation to determine whether you have used marijuana recently? Most detection windows focus on single-use for up to 3 days but marijuana may be found in urine up to 30 days after use for chronic heavy use multiple times per day. For most users it can stay anywhere from 5 days up to 15 days, depending on whether it is three to four times a week (moderate) or daily use. Cannabis metabolites are fat-soluble, which means they bind to fat molecules and take longer to leave the system. If a person has more fat molecules in the body, then it may take longer. Window times are the variable from person to person.

How Long Does it Take Marijuana to Leave Your System

The amount of time THC can be detected by drug screens varies. Factors that influence it include the amount ingested, frequency of use, the sensitivity of the drug test, and type of test. False-positive results are possible and may occur in rare cases. Certain medications can show positive results like anti-nausea meds for people undergoing chemo for cancer. Secondhand marijuana smoke is not likely to produce a positive result. Normal exposure won’t be detectable if it is secondhand. For marijuana to leave the system, it can take up to 30 days for chronic users of marijuana. Heavy, daily use is what will likely produce a positive result but use here and there is not likely have this effect if the test is taken after the detection window. 

Many people use cannabis for ongoing conditions or for relaxation. Knowing the detection windows, how to know when to test, and what types of tests are out there helps individuals who may need workplace drug testing. It also just helps to know how long it shows up in the system for medical reasons or general knowledge. Knowing more about how cannabis impacts the body can help you understand more about how to use it and ways it can support your overall health and wellness.

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