How Long Does Weed Stay in the System? | Urine, Blood & More

How long does it take for weed to leave your system? The main reason people ask this question is random drug tests, especially for those in the corporate world.

Marijuana screening is a common practice in the workspace. Welcome to adulthood. If you’re already here, you know the drill. As for the newbies, no one should have to lose their source of income or chance at a new job because they hit a bong last weekend. C’est la vie.

The laws surrounding personal and recreational use of dagga in South Africa have improved in recent years. But strict rules regarding weed are still prevalent depending on where you work. You can still get fired from your occupation if you test positive and if the employer feels that your habit is getting in the way of your work.

Perhaps you are not a concerned employee but rather a curious individual. You may use marijuana for many benefits such as medical reasons, stress relief, or a euphoric experience. Whatever the reason, keep reading to become the go-to person when it comes to knowing how long a dagga stays in the system.

How Long Does Cannabis Stay in Your System? | 5 Factors

Many factors influence how long weed remains in the body. These factors range from how frequently you smoke to the amount of Tetrahydrocannabinol (THC) in the marijuana plant. The THC molecule found in marijuana is what gives the user a high, this is what drug tests look for. Keep in mind that some CBD products contain up to 0.3% levels of THC, thus allowing you to

An in-depth look at the various factors will give you the clarification that you desire:


How often you use weed could determine the outcome of a marijuana screening. Thus your chances of testing positive for marijuana intoxication is much higher, the more you smoke. How long you use weed for and how potent the strain is can also make an impact on the results.

The good news is that there are many strains that contain higher percentages of CBD and lower portions of THC. These strains have relaxing properties, ideal for stress and anxiety.

Body Mass Index (BMI)

A person’s total body fat could determine how long weed lasts in their system because the body stores THC metabolites in fat cells. People with higher BMI have more body fat. Essentially the more body fat a person has, the more places THC can be stored which makes it last longer.


If you consume weed in the form of edibles, chances are, the THC will stay in your body for a longer time because it will take longer to break it down. CBD edibles are an excellent choice If you are concerned about weed remaining in your system for too long.

Find out more about CBD edibles in South Africa to give them a try.



Even your sex can determine how long weed stays in your system. The metabolising of THC molecules occurs slower in women because women have more body fat than their male counterparts.


A dehydrated body has a lower concentration of water, which increases the concentration of THC in the urine. The less water you consume, the longer it takes for weed to exit your body.

How Long Does it Take for Weed to Get Out of the System?

Marijuana screenings give us an idea of how long weed stays in our system. An estimation of how long traces of THC could last in different parts of the body can help determine how long it takes for our bodies to show no sign of marijuana use.

Samples are taken from urine, blood, saliva, and even hair and nails. THC will show up in these results at varying rates. Have a look at how long weed stays in different parts of the body.

How Long Does Weed Stay in Your Blood?

Blood is not generally tested for marijuana. Traces of THC would disappear out of the bloodstream after about two days. When you inhale marijuana smoke, the molecules enter your bloodstream within a matter of seconds. This type of test will reveal current intoxication, but as mentioned before, blood tests are not as standard.

How Long Does Weed Last in Saliva?

Traces of THC will last in the saliva for about 34 hours. Saliva tests are gaining traction as they are more convenient and quicker to administer.

Recently, traffic officers have started to use new and improved ways of testing which will allow them to determine an intoxicated driver on the spot. Employers who implement this testing method can now see if you are stoned at work.

How Long Does Weed Stay in Hair?

THC molecules enter the bloodstream of the hair follicles. A positive marijuana result could be possible for up to 3 months for an avid marijuana consumer. Hair tests are rare as they do not have conclusive results for infrequent users. Another reason is that hair strands can absorb second-hand dagga smoke from physical contact with a smoker.

How Long Does Weed Stay in Your Urine?

The urine sample is the most common to use in a drug test, especially in the workplace. The results of a urine test depend on the frequency of a user. People who use weed up to 2 days per week will test positive for 1-3 days.

Those who take or smoke cannabis products more often, several days during a week, will show traces of THC for 7-21 days. For the heavy user (everyday user), THC could show up as long as one month after the last use.


How Long Does Weed Stay in Your System if You Smoked Once?

After one hit, a marijuana screening can detect THC metabolites for up to 3 days, according to Medical News Today. To reiterate, the metabolism rate of an individual plays a huge role in how fast the THC cannabinoids take to exit your system—however, the body stores THC in fat cells. A person who does not have THC stored in their body already will have a quicker release of THC.

How to Test Negative for Weed?

If you’re a regular smoker, there is not much that you can do to change your fate of testing positive for weed. Many people have tried to tamper with screening test samples.

Most tampering methods have failed to sway results, such as adding bleach to a urine sample. Even products that claim to hide THC traces in your system are not scientifically proven to be effective.

However, there are ways to try and eliminate the chances of a positive test. The methods might not be full-proof, but they are worth trying if you are in a pickle. Here are five ways to test negative for weed:

Stop Smoking

The first thing you need to do is quite apparent, stop smoking or ingesting cannabis products for a while. Doing this won’t always be easy for an everyday smoker, but if you are determined to get weed out of your system, this would be the best way to achieve noticeable results.

Drink Fluids

The most efficient way to clear out weed in your system is to flush it out with liquids. You want to urinate like a pregnant lady, and to make everything look kosher, take B-12 vitamins to give your urine its distinct pale yellow colour. Try lemon water, cranberry juice, or apple cider vinegar for a natural detox.

Use CBD Oil Instead

Some CBD oils contain a high enough concentration of THC to trigger a positive marijuana test. However, If you want to lower the THC levels in your system, you can use CBD oils low in THC instead.

Cannabidiol will allow you the same relaxation and ease of stress or anxiety without the need to worry about a drug test. If you are willing to give CBD a try, keep in mind that not all CBD oils are created equally, some might not deliver.

Here is how to find pure CBD oil in South Africa that is reliable. 



Try a detox drink or kit. A detox drink will eliminate THC from urine by masking the urine sample with many vitamins and proteins. A detox kit is a system-flushing program that uses detox remedies over days. The detox kit is a superb choice for irregular to moderate smokers.


Remember how the body stores THC metabolites in fat cells? Some people believe that if you work up a sweat, you could release the stored THC from the fat cells and into your system.

Be sure not to exercise one day before or on the day of a test. Doing so will result in an increased chance of testing positive because a drug test will pick up THC that has recently been released into the system.

When Is It Okay to Test Positive for Marijuana?

The CBD oil found in many medications and other products could have traces up to 0.3% of THC. Medical marijuana, specifically cannabidiol (CBD), is growing in popularity in the medical sphere due to its beneficial properties. So, be sure to inform your employer if you are using any products that contain CBD oil.

Certain medications such as Ibuprofen and Naproxen can cause false-positives when testing for THC. Furthermore, CBD is associated with other medications to help treat Parkinson’s Disease, Crohn’s Disease, Kidney Diseases, and more. Medical marijuana is also excellent for nausea, pain, anxiety, and PTSD.

Marijuana Testing

How Long Does Weed Stay in Your Body? | Types of Strains

Marijuana is typically divided into three categories based on its botanical properties: Indica, Sativa, and Hybrid.

Sativa and Sativa-dominant Hybrids are associated with other-worldly highs and energy. In contrast, Indica often tends to have more CBD content, which is why these strains are associated with relief, relaxation, and medicinal marijuana.

While there is little scientific research to suggest that different strains will have varying effects on the body, as mentioned before, the more potent the weed, the longer it stays in your system.

Here is a list of widespread weed strains to give a better outline of how long it will stay in your system in terms of its THC level:


  1. Ice: 15%-20% THC
  2. Granddaddy Purple: average 21% THC
  3. Northern Lights: 15-22% THC
  4. Blueberry High: 23% THC
  5. Purple Kush: 18-25% THC


  1. Durban Poison: about 26% THC
  2. Green Crack: between 15-22% THC
  3. Sour Diesel: 24% THC
  4. Super Silver Haze: 19% THC
  5. Jack Herer: between 18-24% THC


  1. Wedding Cake: around 27% THC
  2. Original Glue: between 27-32% THC
  3. Strawberry Banana: 25% THC
  4. Skunk: between 15-19% THC
  5. OG Kush: average 20% THC

Lower THC = Faster Metabolising

Of course, there are way more strains to mention, but these are some common strains that people are familiar with. Choose the marijuana type that will leave your system at a faster rate by looking at the THC percentage of each strain. Knowing what kind of strain to use can help you figure out when to use it.

Durban Poison is among the most popular of the strains mentioned above. What’s more, is that it is easily accessible for South Africans. Durban Poison is regarded is one of the top strains to grow globally because it is relatively easy to grow with high levels of THC.

Cannabis Plant

Summary: How Long Does Dagga Stay in Your System?

How long weed remains in the body depends on many factors and differs from person to person. The urine test is the most common test to perform during a marijuana screening in the workplace, but rapid saliva tests are picking up speedily on the roads.

There are no proven methods to prevent a positive marijuana test if you have been smoking or taking edibles, but there are some actions one can take to speed up the metabolising process.

Under specific circumstances, you can still get fired for using weed at most workplaces in South Africa because. However, if you have proof for the justifiable use of medical marijuana from a professional, then you should be able to keep your job.

The types of cannabis strains might not have different effects on the body, but the various percentage levels of THC per strain could be a good indicator of how long weed stays in your system.

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