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Does CBD oil show up in a blood test?

What is CBD?

Cannabis sativa is a versatile plant grown for many purposes including food, recreation, hemp-based construction materials, and medicinal uses. There are more than 400 compounds in cannabis and 80 of those are biologically active. The most common active compound specific to the cannabis sativa is the cannabinoids, which is found nowhere else.  

CBD, which stands for cannabidiol, is a type of cannabinoid and primarily comes from marijuana and hemp. CBD is now being used everywhere — in pet treats, coffee, skincare products you name it. Is CBD healthy? Advocates also say that it helps manage pain and anxiety. Although it’s used in a wide range of products, like CBD tinctures, however, CBD has not yet been approved by the FDA.

How long does CBD stay in your system?

The time taken by cannabidiol in your body depends on different factors. Metabolism plays a huge role in how CBD is excreted from your body. Another aspect to consider is whether CBD is consumed with food or on an empty stomach. Certain foods promote bioavailability and boost overall cannabidiol concentration in the body. 

Another factor is the method of administration and dosage. The presence and effects of CBD in the system are related to how the CBD is introduced into the system. For example, vaping or smoking CBD enables it to take effect immediately whereas ingestion delays the onset for a couple of hours. Moreover, the amount of cannabidiol consumed at a time influences how long it remains in the system. 

While the time taken for CBD to detach to the body depends on the above-mentioned factors, it can be deduced that cannabidiol is likely to leave your body after a week or two. 

How long does CBD remain in your urine?

In cases of heavy use, CBD stays in the urine for a week and the detection period can exceed a month. If you consume it once, THC and its metabolites can stay in urine for about 3 days. 

How much CBD oil can you take daily? If you consume more than 2000 milligrams of legal CBD products on a daily basis, it is most likely that your urine test will come back positive. This looks like a large quantity but using CBD frequently might trigger a false positive. 

How long does CBD stay in your hair?

Testing hair for CBD is not common and there are no recognized cut-off limits for THC metabolites in the hair. Private industry cut-offs consist of 1 pg/mg (pictogram per milligram) of THC-COOH. The window of detection of THC metabolites in the hair lasts up to 3 months.

Can CBD make you fail a drug test?

There are instances where using cannabidiol can potentially cause a positive reading during a drug test. One of the most common reasons is using a product that contains THC. You might consume a low-quality product that contains THC due to mislabelling. Furthermore, cross-contamination during manufacturing may lead to THC getting into other products. This mostly happens when CBD oil is manufactured in a place that handles cannabis like a dispensary. 

Does CBD Show Up in a Blood Test?

The short answer is no. CBD is not tested for during a routine blood test, so there is no reason why it would show up. You would specifically have to ask for a CBD test for this to happen. However, if THC levels are being tested and the CBD products you have used have traces of THC, then this could show up. Always make sure to check the label of the CBD products you are purchasing to check for THC amounts.

How long before CBD oil takes effect?

CBD Oil’s Until It Effect

CBD oil is a popular and effective treatment that is increasingly being used for many types of medical conditions. Physical conditions such as pain, arthritis, cancer symptoms, inflammation, and nausea can be treated with CBD oil, as well as a range of mental health disorders as well.


If it’s your first time using CBD oil, it’s best to start slowly and with small doses until you understand how it works and how it affects your body. You might be wondering how long before CBD oil takes effect. Depending on the individual and several different physiological factors, the time it takes for CBD oil to take effect will vary. It may take from a few minutes to a few hours to start taking its full effect.


CBD oil needs to enter your bloodstream in order to be distributed through the body’s endocannabinoid system. Once it has reached the endocannabinoid system, CBD interacts with your body’s receptors to take effect. The four most popular ways to take CBD oil include:

  • Inhaling
  • Ingesting
  • Topically
  • Sublingually



Besides intravenously, inhaling is the fastest way to get the CBD into your bloodstream. It goes straight into your lungs, and from there it transfers into your bloodstream and begins to circulate around your body. Within a minute or so, the CBD will be absorbed into your bloodstream, though it may take a few minutes for the effects to kick in. Therefore, within 10 minutes or less you will begin to feel the effects of CBD.


Although it’s one of the slowest ways to get it into your bloodstream, ingesting CBD oil may be the easiest way to take it. Ingesting means the CBD must go through the digestion process before it reaches the bloodstream. By the time it does, the total CBD concentration will be reduced. It may take anywhere from 45 minutes up to 2 hours to feel the effects of CBD. There are a few different ways to ingest CBD oil, such as edibles (e.g. gummy bears, brownies), beverages, droplets, and capsules.



Applying the CBD oil topically is another simple way of getting your CBD dose. The CBD oil treatment is applied directly to skin which absorbs it. Topical CBD treatments are beneficial for physical ailments such as muscle and joint pain and inflammation along with skin conditions like eczema. This method of use is most effective when treating these types of physical ailments, and it may take about 15 minutes to feel relief. The most common topical products are balms, lotions, ointments, and patches.



Sublingual is the second fastest way for CBD oil to take effect on the body. This is the process of placing the CBD oil under your tongue with either a spray or dropper bottle. It’s most effective when you hold the oil under your tongue for 30 seconds, while the capillaries under your tongue absorb the CBD, and then it passes into your bloodstream. This method is faster than ingestion as it bypasses the digestive process. The effects may take from 15 to 60 minutes to be felt.


Individual factors such as body weight, metabolism, frequency of use, and dosage all contribute to how long it takes to feel the effects of CBD oil and how long the effects last. The method that you choose to take CBD oil depends on your preference and what is best for you. It may take some experimenting and time to find the right method, so it’s important to be patient.