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How Long Does Weed Stay in Your System?

Marijuana, also known as weed, pot, or cannabis, is a psychoactive drug that comes from the cannabis plant.

It contains the mind-altering chemical THC (tetrahydrocannabinol) and is widely used for recreational and medicinal purposes.

However, its use is still illegal in many countries and is a topic of ongoing debate.

Weed can enter the body through various methods, including inhalation (smoking or vaping), ingestion (edibles or drinks), or absorption (topical applications or tinctures).

Once consumed, it can stay in the body for varying periods, depending on several factors.

The duration for which weed stays in your system can vary depending on the type of drug test being used.

On average, it can be detected by drug tests in:

  1. Urine for 3-30 days
  2. Blood for 1-3 days
  3. Saliva for 1-3 days
  4. Hair for up to 90 days

individual factors can affect the amount of time weed can stay in your system, including the frequency of use, method of consumption, body fat percentage, metabolism, and hydration levels.

To speed up the elimination of weed from your system, you can try hydrating, exercising, eating a healthy diet, and using detox products.

However, these methods may not guarantee the complete removal of THC from your system.

For more information on how long marijuana stays in the body, please keep on reading for a little research or contact our team today.

What is Weed?

Weed, also known as marijuana, is a psychoactive drug derived from the Cannabis plant.

It contains chemical compounds called cannabinoids, which can have various effects on the body.

Weed is commonly used for recreational and medicinal purposes due to its ability to induce relaxation, euphoria, and pain relief.

However, it is important to note that the legality and regulations surrounding weed vary from country to country.

It is always advisable to consult local laws and regulations before using or possessing weed, it is best to contact your local law enforcement agencies.

How Does Weed Enter the Body?

One of the most common questions about marijuana use is how long it does stay in the system.

But before we can answer that, it’s important to understand how weed enters the body in the first place.

There are three main methods of consumption: inhalation, ingestion, and absorption.

Each of these methods has its own unique effects on the body and can impact how long weed can stay in your system.

Let’s take a closer look at how weed enters the body through these methods.


Inhalation is one of the common methods of consuming weed, allowing the active compounds to enter the body through the lungs.

Here are the steps involved in inhalation: Prepare the weed by grinding it into fine particles.

Load the ground weed into a smoking device such as a pipe, bong, or joint.

Apply a flame to the weed and inhale the resulting smoke. Hold the smoke briefly in your lungs to maximise absorption.

Exhale the smoke.

Inhalation provides rapid effects because the active compounds quickly enter the bloodstream through the lungs.

However, it also carries risks such as lung irritation and damage from smoke inhalation.

It’s important to use inhalation methods responsibly and be aware of the potential health consequences.


Ingestion is one of the ways weed enters the body. When consuming weed orally, it goes through the digestive system before being absorbed into the bloodstream.

Here is a list of steps involved in the ingestion process:

  1. Consuming Edibles: Weed-infused foods or beverages are ingested orally.
  2. Stomach Absorption: The cannabinoids in the edibles are broken down in the stomach and absorbed into the bloodstream.
  3. Liver Metabolism: The liver metabolises THC, the psychoactive compound in weed, into a more potent form.
  4. Effects: The effects of ingested weed take longer to kick in compared to inhalation, usually around 30 minutes to 2 hours, but can last longer.

Ingested weed can have longer-lasting effects, making it a popular choice for those seeking a prolonged experience.


Absorption is the process through which weed enters the body.

Here are the steps involved in the absorption of weed:

  1. Inhalation: When weed is smoked or vaped, the active compounds are absorbed through the lungs directly into the bloodstream.
  2. Ingestion: Consuming edibles or drinks infused with weed results in absorption through the digestive system. It takes longer for the effects to kick in compared to inhalation.
  3. Absorption: Weed can also be absorbed through the mucous membranes in the mouth, such as when using tinctures or sublingual sprays.

How Long Does Weed Stay in Urine?

To test for the presence of cannabis in your system, a urine test is commonly used.

Here are the steps to follow when it comes to urine testing:

  1. Abstain from using cannabis: Stop using cannabis as soon as you know you will be undergoing urine test.
  2. Stay hydrated: Drink plenty of water to help flush out THC and other metabolites from your system that could show up in a urine sample.
  3. Exercise regularly: Engage in physical activity to increase your metabolism and promote the elimination of toxins.
  4. Eat a healthy diet: Consume a balanced diet rich in fruits, vegetables, and fibre to support your body’s natural detoxification processes.
  5. Consider detox products: There are various detox products available that claim to help eliminate toxins from your system, but their effectiveness may vary.

Following these steps can increase your chances of passing urine testing for cannabis at any urine drug screens.

How Long Does Weed Stay in Blood?

When it comes to cannabis entering the body, one of the methods is through the bloodstream.

THC, the active compound in cannabis, is absorbed into the bloodstream and carried to various organs and tissues.

This allows for the psychoactive effects to be felt throughout the body.

The concentration of THC in the blood can be measured to determine recent cannabis use.

A blood test can commonly be used in situations like DUI testing, where recent impairment is of concern.

It’s important to note that THC levels in the blood decrease significantly within a few hours after use.

How Long Does Weed Stay in Saliva?

Saliva tests is a common method to detect the presence of cannabis in the body.

Here are the steps to consider when it comes to saliva testing:

  1. Prepare for the test by avoiding food, drink, smoking, or oral hygiene activities for at least 30 minutes before the test.
  2. Collect the saliva sample by swabbing the inside of the mouth with a test strip or cotton swab.
  3. Ensure the swab is saturated with saliva and place it in the provided container or testing device.
  4. Follow the instructions provided regarding the testing device and wait for the results.
  5. Results are usually available within a few minutes, indicating whether cannabis is present in the saliva sample or not.

Saliva testing is convenient and can detect recent cannabis use within a timeframe of a few hours to a couple of days.

How Long Does Weed Stay in Hair?

Hair tests is a common method of drug testing used to detect the presence of cannabis in the body.

Here are some steps to consider regarding hair tests and cannabis testing:

  1. Hair sample collection: Hair is typically collected from the scalp, and a sufficient amount is required for an accurate hair test.
  2. Drug incorporation into hair: After cannabis is consumed, its metabolites enter the bloodstream and are eventually incorporated into the hair follicles.
  3. Testing process: During the testing process, the hair sample is washed to remove external contaminants and then analysed for the presence of drug metabolites.
  4. Detection window: Hair testing can detect cannabis use for up to 90 days or even longer, depending on the length of the hair sample collected.
  5. Accuracy: Hair testing is considered a highly accurate drug test, as it can detect even low levels of drug metabolites in the hair shaft.

Factors Affecting How Long Weed Stays in Your System

There are many factors that can influence how long weed can stay in your system.

From how often you use it to how much body fat you have, each individual’s experience with weed can differ greatly.

In this section, we will discuss the key factors that can affect the duration of weed in your system.

From the frequency of use, how much cannabis you use to the method of consumption, we will uncover the various elements that can impact the length of time weed stays in your body.

Frequency of Use

Frequent use of weed can significantly impact how long it stays in your system.

To understand how often you consume weed, consider the following steps:

  1. Keep track of your usage by maintaining a journal or calendar.
  2. Reflect on the number of times you use weed in a day or week.
  3. Consider the duration of your usage, whether it’s occasional or regular.
  4. Assess the quantity of weed you consume during each session.

By analysing your frequency of use, you can better estimate how long cannabis will remain detectable in your system.

Remember, the more frequently you use weed, the longer it may take for your body to eliminate it.

Method of Consumption

When it comes to weed, the method of consumption plays a significant role in how it affects the body and how long it stays in your system.

Here are the different methods of consumption:

  1. Inhalation: Smoking or vaping weed allows the cannabinoids to quickly enter the bloodstream through the lungs.
  2. Ingestion: Consuming edibles or drinks containing weed leads to slower absorption through the digestive system.
  3. Absorption: Topical products like creams or patches are absorbed through the skin and provide localised effects.

Understanding the method of consumption is crucial for managing the effects of weed and knowing how long it will stay in your system.

Body Fat Percentage

Having a higher body fat percentage can affect how long weed stays in your system.

THC, the psychoactive compound in weed, is stored in the fatty tissues and fat cells and released slowly over time.

This means that individuals with a higher body fat percentage may retain THC for a longer period compared to those with a lower body fat percentage.

Factors like metabolism and frequency of use also play a role, but body fat percentage is an important consideration.

Drinking plenty of water, exercising regularly, and maintaining a healthy diet can help speed up the elimination of weed from the body by keeping you body mass index at a healthy level, regardless of body fat percentage.


Metabolism plays a crucial role in how long weed stays in your system where it can be pick up by drug tests.

Here are some steps you can take to optimise your metabolism and speed up the elimination of weed:

  1. Eat a balanced diet: Incorporate foods high in metabolism-boosting nutrients like lean proteins, whole grains, fruits, and vegetables.
  2. Stay hydrated: Drinking plenty of water helps support metabolic function and flush toxins out of your system.
  3. Exercise regularly: Physical activity helps increase metabolism and promote the breakdown of fat cells where THC is stored.
  4. Get enough sleep: A well-rested body is better equipped to regulate metabolism and eliminate toxins efficiently.
  5. Avoid crash diets or extreme fasting: These can slow down your metabolism and hinder the elimination process.

By following these steps, you can support your metabolism and help expedite the clearance of weed from your system.

Hydration Levels

Maintaining proper hydration levels is important when considering how long marijuana stays in your system.

Drinking an adequate amount of water helps to flush out toxins, including THC, from the body.

It is recommended to drink at least 8 glasses of water per day to stay hydrated.

Furthermore, staying hydrated can aid in speeding up the elimination of weed from your system.

Remember to hydrate before and after exercise, as sweating can lead to dehydration.

Overall, maintaining optimal hydration levels is essential for overall health and can assist in the elimination of weed from your system to help negate a positive urine test.

How to Speed Up the Elimination of Weed from Your System?

For many individuals, the lingering presence of cannabis in their system can be a concern, especially when facing drug tests or other situations where it may be an issue.

In this section, we will discuss ways to speed up the elimination of cannabis from your system.

By incorporating simple habits such as hydration, exercise, and a healthy diet, as well as utilising weed detox products, you can potentially reduce the detection time of cannabis in your system.

Let’s dive into these methods and see how they can help you clear out cannabis faster.


Hydration is crucial when it comes to speeding up the elimination of weed from your system.

Here are some steps to stay hydrated:

  1. Drink plenty of water throughout the day to flush out toxins.
  2. Avoid dehydrating substances like caffeine and alcohol.
  3. Include hydrating foods like fruits and vegetables in your diet.
  4. Sip on herbal teas or electrolyte-rich drinks to replenish fluids.
  5. Monitor your urine colour – clear or light yellow indicates proper hydration.


Regular exercise can potentially help to speed up the elimination of weed from your system.

Here are some steps you can take:

  1. Aerobic exercise: Engage in activities like running, swimming, or cycling that increase your heart rate and promote sweating.
  2. Strength training: Incorporate weightlifting or resistance exercises to build muscle and boost metabolism.
  3. Stay consistent: Aim for at least 30 minutes of exercise most days of the week to maintain regular detoxification.
  4. Drink plenty of water: Hydration is important for detoxification, so make sure to drink an adequate amount of water before, during, and after exercise.

Remember, exercise alone may not be enough to completely eliminate weed from your system, but it can help support the natural elimination process.

Eat a Healthy Diet

A healthy diet can support the elimination of weed from the system.

Here are some steps to consider:

  1. Stay hydrated: Drinking plenty of water and fluids can help flush out toxins.
  2. Eat nutrient-rich foods: Focus on fruits, vegetables, whole grains, and lean proteins to support overall health and detoxification.
  3. Avoid processed and junk foods: These can hinder the body’s natural detoxification process.
  4. Include antioxidants: Foods high in antioxidants, such as berries and leafy greens, can help protect cells from damage.
  5. Support liver health: Include foods like garlic, turmeric, and cruciferous vegetables, which can aid in liver detoxification.

Use Detox Products

Using detox products can help speed up the elimination of weed from your system.

Here are some steps to consider:

    • Choose a reputable detox product that is specifically designed to eliminate THC.
    • Follow the instructions provided with the detox product carefully.
    • Start the detox process well in advance of any drug test to allow sufficient time for the product to work.
    • Stay hydrated and drink plenty of water to facilitate the detoxification process.
    • Engage in regular exercise to help stimulate the metabolism and aid in the elimination of toxins.
    • Eat a healthy diet that is rich in fruits, vegetables, and fiber to support the body’s natural detoxification processes.
    • Consider using additional natural detox methods such as sauna sessions or herbal teas.
    • Remember that detox products are not a guaranteed method of passing a drug test, and individual results may vary.

Frequently Asked Questions

How long can weed stay in your system?

The length of time that weed can be detected by a drug test in your system varies depending on various factors such as the method of testing, how it was consumed, and your individual usage.

Blood tests can detect marijuana for 1-2 days, while urine tests have a detection window of a few days to several weeks.

Saliva tests can detect weed for 24-72 hours, and hair tests have the longest detection time of up to 90 days.

How does secondhand cannabis smoke affect drug testing?

Second hand marijuana smoke can potentially affect drug testing results, especially for hair follicle tests.

It is recommended to avoid being in close proximity to someone smoking weed to reduce the risk of THC exposure and potential false positive results.

What type of drug test is most commonly used for detecting weed?

Blood tests are the most commonly used type of drug test for detecting weed.

They can detect marijuana for 1-2 days after use, making them useful for testing for recent drug use.

However, they are not as reliable for detecting chronic cannabis use.

What is the chemical substance in weed that produces a ‘high’?

The chemical tetrahydrocannabinol (THC) is the main component in weed that produces a ‘high’ when smoked, ingested, or vaped.

They can detect THC in a drug test for several days to several months, as it is slowly released, depending on the method of drug testing and individual usage.

How does the individual’s body mass index (BMI) affect the detection window for weed?

Individuals with a higher BMI may have a longer detection window for weed in their system.

This is because THC and its metabolites are fat-soluble, meaning they bind to fat molecules and take longer to leave the body if people have slower metabolisms.

What is the clinical interpretation of urine drug tests for weed?

According to a 2017 review published in the Mayo Clinic Proceedings, the interpretation of urine drug tests for weed should take into consideration factors such as the type of drug used, the amount used, and the individual’s metabolic rate.

A positive result does not necessarily indicate current, habitual drug or heavy use.

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