How Long Marijuana Stay in Blood? THC Guide

There are many reasons why you would need to get a THC detox. Maybe you have an upcoming drug test for a lucrative new job or simply wish to take a tolerance break. Whatever the reason, it is possible to flush weed out of your system relatively quickly and reset yourself.

How Long Does Weed Stay in Your System?

Tetrahydrocannabinol (THC) is the active ingredient in weed that produces the feel-good feeling. Various tests have been devised that can detect THC in the body days or weeks after it was last used. Various factors determine how long THC can be detected in the body. They include:

  • Percentage of body fat
  • Frequency of marijuana consumption
  • The sensitivity of the test

While drugs like alcohol are undetectable in the body after just a few hours, THC lingers on. It can be detected for weeks after consumption with the right test. Numerous tests have been designed to detect THC in blood, urine, and hair days after the last use. However, saliva tests are only effective for a few hours after use.

According to a study published in the Journal of Psychoactive Drugs, THC is a lipid-soluble compound, which means it binds to fatty tissue in the body. Consequently, it takes much longer than other drugs to eliminate from your system.

Detection Window

The detection window for cannabis varies based on various factors. Different studies have also found different averages. For instance, a 2017 study by Mayo Clinic Proceedings found that one cannabis cigarette can be detected for up to 3 days. The study found that the frequency of using weed would affect how easily weed could be detected in the body.

Frequency of Use One-Time Use 3-4 Times a Week Once a Day Or More
Detection Time Up To 3 Days 5-7 Days 30 Days or More

The table above shows how detection varies based on the frequency of using weed according to the study.

The study also found that different tests have different detection windows. In the study, they investigated saliva tests, urine tests, hair tests, and blood tests. Hair tests were the most sensitive, and THC could be detected up to 90 days after use.

However, the hair test can sometimes generate a false positive. This is because hair tests use oil in the skin that is transferred to the hair. Consequently, someone in contact with a weed user could see a false positive on their results. For more information on detoxifying products, you can visit

Urine 3-30 days after use
Saliva 24-72 hours after use
Hair Up to 90 Days after use
Blood 3-4 hours after use


The table above shows the sensitivity of tests based on the sample collected. Blood has the worst sensitivity, with a short window of 3-4 hours after use without any marijuana detox.

Setting A Detox Plan

The best plan how to get weed out of your system is to abstain. With time, the THC will clear from your system. When creating a plan to eliminate the THC from your body to pass a test, there are various factors that you will consider. These are:

Time to Test

The time between now and the THC test is the most important when looking for how to detox from weed. If you are a light user and have more than three days before the test, the weed will most likely have passed from your system by then. You will only need to abstain for those few days.

Your Weight

THC is a fat-soluble compound. As such, people with more body weight take longer to eliminate it as opposed to lean people who are lean and muscular. The best way to detox your body from THC if you have a high body weight is to increase your activity level. Increasing their exercise level will eliminate THC even faster for those already muscular and burning up a lot of fat.

Marijuana Use Frequency

The frequency of use will also be factored in if you want to flush marajuana out of your system. If you only used pot once, you can expect it to clear from your system in as little as 24 hours. For frequent users, THC can be detected in the body for up to 30 days. However, it can be eliminated, or lowered to undetectable levels, with the right detox regime.


Budget is another important consideration when trying to get THC out of your body. Modern and effective detox products can cost up to $100 or more. Without a professional detox product, there are some home remedies that show varying levels of effectiveness. Without any other option, they can be a good alternative.

How Do THC Cleanse Detox Remedies Work?

All professional marijuana detoxification methods work in two basic ways. These are:

Burning THC-Rich Fat

A detox remedy will work to get pot out of your system by burning fat, which is where THC is stored in the body. They will quickly release the THC compounds into the bloodstream, from where they can leave the body quickly.

Pumping THC Out

The other way a weed cleanse remedy works is by actively pumping out THC via urine and poop from the body. These detox kits deliver varying results, so it is important to pick the right kit.

Burning THC-saturated fat via cardio or sauna will fall to undetectable levels in the system. Pumping THC will eliminate any that is already in the bloodstream.

The most popular methods for passing THC out of the body have been passed down through the generations. Sometimes these methods work, and sometimes they do not. The reason for this is that they are not based on scientific advice.

A professional detox product is the fastest way to clean out your system for a drug test. Scientists design these products to eliminate toxins from the body and speed up the body’s natural detox process. Along the process, they eliminate THC as of the toxins in the body. They come as drinks, pills, and more to ensure you are THC-free for your test.

The Best Detox Drink For Weed

There are numerous detox drinks recommended for passing a THC test. One of the most common is to take a lot of water. Doing so will help eliminate the THC from the body. However, that would only work for a casual user who uses weed once a month or never.

Fruit Pectin – Clean Your System For Drug Test

The popular fruit pectin brand Certo and Sure-Jell are often cited as effective methods to flush THC from the body. While no scientific study supports these claims, there is a lot of anecdotal evidence that it works.

In one Rollitup survey, 22.9% of respondents said it worked from experience, while another 34.3% said they heard it worked. Overall, that represents over 57% of respondents who say it works, which is better than chance. A Reddit post from 2012 detailed how to use Pectin to pass a drug test, and many respondents claimed it had worked for them.


Exercise can help to eliminate THC from the body by burning up fat. Doing so can help to shorten the time it takes to eliminate THC from your system.


Sauna works in the same way as exercise. It causes your body to burn fat, which will eliminate THC and other metabolites from the body. The result is that it reduces the levels of THC to undetectable.


One of the best detox drinks for weed 2022 in water when you have no other solution. Taking capfuls of water will lower the THC concentration in your saliva, which could prove effective for lowering THC levels to undetectable.

Review of The Best Detox Supplements

While the methods mentioned above can work sometimes, the best solution is scientifically designed detox products. When used according to the instructions included in the package, they have a higher-than-chance effect on the THC levels in your system. They are the best detox for weed in 2023.

Toxin Rid Pills Review

Toxin Rid Pills are a product developed by Test Clear, which provides drug testing solutions that include detox kits and pills. Each kit contains natural ingredients and herbs, minerals, and vitamins. They are designed to speed up the body’s natural detoxification.

The product is free from fillers and animal products. Their products include 1-day and 2-day detox pills and a 7-day or ten-day detox kit for frequent users. Their most popular product is the 5-day Toxin Rid pills. When you purchase the 5-Day Toxin Rid pills, you will receive:

  • Dietary fiber supplement
  • Pre-rid tablets
  • Liquid detox

Pre-Rid Tablets

These tablets are rich in vitamins, minerals, and other ingredients. Drugs attach to electrolytes like potassium and sodium, which are eliminated from the body. These tablets contain Alfalfa leaf extract, a fat burner, and a diuretic. Boron, chloride, and kelp are used to detoxify the body. Lithium and magnesium are natural electrolytes that maintain equilibrium in the body.

Ingredients contained in the tablets and detox liquid are:

  •  Sodium
  • Chloride
  • Magnesium
  • Potassium
  • Alfalfa leaf extract
  • Calcium
  • Boron
  • Iron
  • Kelp

The components stimulate urine production, which quickens the body’s natural detoxification process. Toxin Rid pills will remove 20-30 percent of the THC in your body. The detox liquid also contains these ingredients:

  •  Sulfate
  • Potassium
  • Chloride
  • Boron
  • Sodium

The dietary fiber is psyllium husk powder, which is a laxative. It works in combination with the components above to improve the chances of metabolites being eliminated in poop.


  • Provides results in as fast as an hour
  • Good for general health
  • Effective
  • Easy to use


  • A bit costly.

Detoxify Mega Clean Review

Detoxify Mega Clean is a popular detox drink, easily accessible at Walmart. The Detoxify Mega Clean drink works by flushing toxins in your urine, ensuring fresh urine is free of toxins in your bladder, in just hours.

At the same time, it floods your body with minerals, nutrients, and creatine. As a result, it helps to rebalance the fresh urine you produce, making it appear natural. Other detox drinks do not provide this balance effectively. With this drink, you can get a detox cleanse for drug test in up to 5 hours.

For the most effective results, it is advised that you start the detox 48 hours before the test. That means eating lots of fresh fruit and drinking lots of water. You can then take the drink over 30 minutes in measured sips a few hours before the test.


The drink contains numerous vitamins and minerals to detoxify the body. Those listed on the product label include the following:

  •  Vitamin A
  • Thiamine
  • Vitamin D
  • Riboflavin
  • Vitamin B6
  • Niacin
  • Folate
  • Vitamin B12
  • Biotin
  • Pantothenic Acid
  • Calcium
  • Magnesium
  • Zinc
  • Selenium
  • Chromium
  • Sodium
  • Potassium
  • Manganese

It also contains herbal ingredients, which are:

  •  Burdock Root
  • American Ginseng Root
  • Guarana Seed
  • Uva Ursi Leaf
  • Milk Thistle Seed
  • Taurine
  • Stinging Nettle Leaf


  • Customers report it works
  • Some customers felt energetic after using it
  • Most customers reported it induced frequent urination
  • Affordable


  • The taste is not good
  • Complaints of side effects

Clear Choice Rescue Cleanse Review

Rescue Cleanse is a popular marijuana cleanse detox drink often recommended in the diet world. Some claim it is the best detox drink on the market. Its formula is claimed to help rid the body of high levels of toxins.

Its most popular bottle contains 32 ounces, which is said to help people weighing over 200 lbs. detoxify. The detox drink contains natural ingredients that flush the body of common toxins screened during drug tests.


The main ingredients in this detox drink are:

  •  Creatine Monohydrate
  • Juniper berry extract
  • Dandelion root extract
  • Turmeric root extract
  • Cornsilk extract
  • Milk thistle seed extract
  • Echinacea purpurea extract
  • Licorice root extract
  • Uve ursi extract
  • Ligustrum berry extract


  • Made with natural ingredients at safe levels
  • Reliable and proven results
  • Easy to use
  • Affordable
  • All US orders above $135 receive free USPS standard shipping
  • A 25% discount when you add four products from a single category


  • Effects only last 5 hours
  • It causes you to pee a lot

Tips For Ways To Clean Out Your System In 24 Hours or Less

If you want the fastest results from these products, you must follow the instructions correctly. You should start the entire cleanse at least 48 hours before taking the professional detox products. It will help eliminate most of the THC from your system, making it easier to eliminate the rest.

Part of the detox can involve some exercise, taking lots of water, and a sauna if possible. In short, do everything possible to burn THC-rich fat while diluting the remaining THC in your body. When you take the detox product, it will work faster and offer the best results.

Using Synthetic Urine for a Fast Cleanse

Sometimes, you need a fast cleanse to clear THC from your body, and a THC detox kit does not cut it. In such a case, you can use a synthetic urine kit to pass a test in the shortest time possible. Below are a pair of products designed for this job.

Testclear Powdered Human Urine Review

Sometimes, there is not enough time to clear THC from the body. That is where powered human urine comes in. Testclear is one of the leaders in synthetic urine with its Testclear Powdered Human Urine.

The product has the same composition as real human urine. All you need to do is add water to it and have a clean urine sample free of drugs. The water is added in a ratio of 1:1. The packet will indicate how much water you need to add.

Once you mix it with water, place it in the microwave oven, and set it to normal human body temperature. Once you are ready to go, pull it out, and submit it for the test.


  • It works and is undetectable when instructions are followed.


  • It is not legal in all states

The Urinator Review

The Urinator is designed to deliver a fake urine sample on demand. It is designed to be discreet and appears to produce a natural urine sample. The Urinator is small and can be concealed with ease.

It comes as a pouch with a tube attached to it and a heating element. The pouch will hold the synthetic urine solution. Filling the pouch and emptying it is done via the tube. The heating element keeps the contents at the ideal temperature.

In the package, you will receive the above-mentioned equipment, a clean urine sample, and temperature test strips to ensure your sample is at the right temperature. A user manual is also included with the test.


  • It delivers a sample at the right temperature
  • It is easy to use
  • Affordable


  • Harder for women to deliver a stealthy urine sample than men.

Detox Products And Methods To Avoid

While a detox can help eliminate toxins from the body, some methods should be avoided. For instance, you should avoid a detox program lasting for a week or more and use laxatives that cause diarrhea.

If any detox drinks for weed cause a severe reaction, such as diarrhea, you should stop it. In general, avoid any program requiring you to consume huge quantities of water and herbal teas without food. Such a program will cause electrolyte imbalance, leading to serious health complications.

Frequently Asked Questions

Can Lab Tests Detect THC Detox Products?

No, they will not. Most commercial detox drinks contain natural ingredients. They do not leave any unique traces that can be detected. Besides that, commonly used drug tests do not test for detox drinks. They only test for the presence of THC.

Do I Need To Detox If I’m Infrequent User Or Took An Edible?

Yes. If you frequently use weed, you should consider using a detox product. The same applies if you recently took an edible. The effects can last up to 48 hours, even if you have only taken one edible. Using a detox ensures THC is not detectable in your sample.

Do THC Detox Kits Work For Hair Tests?

No. Hair retains THC traces for up to 90 days. Common detox products are only designed to work within a few hours. However, most drug tests do not use hair samples to test for drugs. They commonly use saliva tests, and in rare cases, they will use urine tests.

What Is The Most Effective Method to Detox For A Drug Test? 

A professional detox kit is the most effective detox method for the body. It is designed to work within a few hours to help you pass a test.

Does Alcohol Help With THC Detox?

Alcohol has no discernible impact on THC levels. You should never attempt to take alcohol to pass a drug test. If you take too much, you could make things worse by driving to work drunk.

Studies About Weed Detox And THC Metabolites Masking

  • Chemistry, Metabolism, and Toxicology of Cannabis: Clinical Implications: The study found that the remnants of using weed called cannabinoids are left in the body and can be detected in hair, saliva, fingernails, urine, and blood.
  • Urinary excretion half-life of delta 1-tetrahydrocannabinol-7-oic acid in heavy marijuana users after smoking: The study found that cannabinoid metabolites can be detectable in urine even after long periods. It was found that a particular metabolite could be found in urine four weeks after quitting weed.
  • The abuse of diuretics as performance-enhancing drugs and masking agents in sport doping: pharmacology, toxicology, and analysis: The study found that diuretics can be effective as masking agents to eliminate toxins in the body.

Additional Methods To Pass A Drug Test

Some other options to pass a drug test are:

Baking Soda

There is no evidence backing the effectiveness of baking soda. Since its active ingredient, sodium bicarbonate, is alkaline, it will increase the presence of one of the cannabinoid metabolites, THC-COOH, in urine since it is slightly acidic, which means you would fail a THC urine test.

Certo/ Sure-Jell

Some anecdotal evidence suggests that certo/ sure-jell works. However, no scientific study has confirmed its efficacy.


Aspirin has no direct effect on THC levels. However, it can help to cloud the presence of drug compounds in the urine sample. Consequently, if taken briefly before the test, it could lead to an inconclusive result.


Niacin, or vitamin B3, is often cited as a way to conceal THC in the body. When you consume niacin, it stops the body from breaking down fat, where THC is stored. Consequently, it can help to ensure there is less THC in the urine. Nevertheless, it will not stop nearly enough THC in the body from becoming detectable in a urine test.

Tips And Recommendations From Social Media

One Reddit post suggested using Certo/ Sure-Jell to pass a drug test. The post suggested mixing the powder with Gatorade two hours before the test. Mix two packets in a 1:1 ratio with Gatorade and take them immediately. You must ensure you hold in your urine while taking both drinks.

Urinate once you are done and an hour before the test. Take another pee 30 minutes before the test, and then show up for the test. Those who tried the method claimed that it had worked for them.


If you enjoy some weekend weed and are worried you could fail your test, you do not have to. Above, you will find numerous tips to assist you in passing your test. Additionally, various professional detox products have been mentioned, which are known to be effective. While they may cost you up to $100, they are worth every penny, if it means saving your job.

On your next drug test, ensure you use one of the professional products if the timelines mentioned above in the tables mean you will fail your test. Passing the test could mean the difference between a promotion at work and having to start looking for a new job.