Niacin Flush Detox Method

With drug testing beginning to rise in popularity as a workplace standard, people are starting to look for more and more efficient ways to quickly cleanse their bodies of substances that could make them test positive.

Niacin Flush for Drug Detox

Taking niacin has long been a known detox method, but its effectiveness has always been a topic of debate.

What is Niacin?

Niacin, otherwise known as Vitamin B3 is compound naturally found in a human body that serves the purpose of metabolizing carbohydrates. When it comes to niacin for drug testing, it is usually talked about niacin pills that can be bought in pretty much any pharmacy.

Niacin pills are usually used as a dietary supplement for people who are suffering from high cholesterol levels or low niacin levels, but it is also often used to increase the health of skin, hair and eyes. A niacin pill has around 500mg of niacin in it and the recommended daily dose is up to 2000mg, to prevent the occurrence of negative side effects.

Negative Side Effects of Niacin Pills

  1. Skin flushing
  2. Burning sensation
  3. Swelling
  4. Reddening of skin
  5. Skin lesions or hives
  6. Diarrhea
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Niacin Flush

Niacin flush is a method that has been argued to allow a person to successfully clear out traces of metabolites from their body in a shorter amount of time than usual. This is done by increasing the rate at which body breaks down fats, which is where metabolites usually tend to deposit, which in turn allows the person to pass the drug test even though just a short period of time has passed since their last drug use.

The problem with this method is that niacin pills have varying levels of effectiveness from person to person, depending on their height and weight, as well as their metabolism rate. People with higher than average body fat content have reported this method to fail more often than people with lower body fat content.

Another thing to note about this method is that it is not a miracle solution like some people claim and that it has to be done over a period of time, preferably 2 – 5 days for maximum efficiency. This is due to the fact that niacin is very hard on one’s liver and taking large amounts of it (more than 500mg) at once poses a serious health risk.

On the other hand, if the person using this method properly spaces out their dosage (500mg or one pill every 6 hours for 3 or more days) and hydrates plentifully, they pass the drug test in 80% of the reports.

By following this routine, you will be able to successfully cleanse your body from metabolites in 3 – 5 days so plan accordingly:

  1. Immediately after getting up, take 500mg of niacin and drink at least 2 large glasses of water.
  2. Wait a few minutes and try to urinate as much as possible.
  3. Eat a light breakfast, since fatty foods will reduce the effectiveness of niacin and preferably take a caffeinated drink to help you urinate more.
  4. During the day, try to drink water, fruit juice or sports drinks as often as possible, but make sure not to overhydrate yourself and get sick. Stay away from alcohol as much as possible.
  5. Take niacin pills every 5 or 6 hours with 2 large glasses of water, preferably before meals and try to urinate between niacin intake and meals.
  6. On the day of the test make sure to take at least two pills before the test itself and try to urinate as much as you can.
  7. If you notice your urine is discolored (not yellow), take a B12 pill; a discoloration of urine can be a clear sign that you have tried to dilute it and will raise suspicion.

If Taking Niacin Pills

  • Always space them out at least 5 hours to prevent overdosing.
  • Drink a lot of water, preferably two full glasses with every pill. Also drink as much water, fruit juice, sports drinks or caffeinated drinks during the day, but be careful not to overhydrate yourself.
  • Abstain from drugs and alcohol, to prevent negating the effect of niacin pills.
  • Eat light meals and stay away from fatty foods.
  • On the day of the test make sure to take at least two pills and drink 4 to 5 glasses of water.
  • If your urine starts to dilute too much from hydration, consider taking vitamin B12 pill as it turns urine yellow.
  • Try to urinate as much as possible during the process and especially before the test.
  • Bear in mind that taking niacin pills will only have an effect on a urine drug test; all other drug tests are unaffected by niacin intake.


Despite the fact that many people claim that this method does not work, it usually stems from the fact that the amount of time that the pills were taken for was not sufficient. Taking a large dose of niacin pills in a short period of time, just before a drug test, will more often cause serious health problems then help pass said test. Only by giving it time will this method have the expected effect without the negative consequences.

Niacin Flush Detox Method

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Comments 44

  • So on the day of the test take 1000 ml ??

    • No, clearly it states take 1 (500mg) every six hours before a meal with two large glasses of water.

    • Yes but try spacing it out so it’s not too harsh on your liver

      • Hello i recently just passed a urine drug test using the niacin method took them everyday for a week straight drank a lot of water and minimal exercise my only concern is does the niacin PERMANTLEY rid the THC or MASK it? The test is a very sensitive lab test for probation the cut off level is 50 ng but someone in my case i HAVE to test at 0 ng to test negative. My drug tests are random meaning once a week so thats why i need to know if im permantley thc free. There was no drugs found in me so im guessing i’m at 0 ng. Was it the niacin and like i said am i permantley thc free? I only did the niacin after being clean for 4 weeks and my levels were dropping VERY VERY slow. Also, does the brand matter? I passed using the flush free reading online they say it doesnt work but it worked for me so to be safe i bought real niacin the Nicotonic Acid that actually gives you the flush. Thank you! Please reply!!!

        • Dude it does work huh? Imma have to use this method again over probably a span of a week or less time so I wont have to overdose and flush ya kno?.. But will you experience the flush every time Or; is there a more subtle way to take 100mg every 2 hours for 24 hours? Should probably be less harsh on the bladder system. Idk I go for mine in 72 hours so I have a jump start on the hydration regiment.

        • If your average weight and a regular smoker, youd be clean after 4 weeks even without the niacin.

    • Yes, nevermind Molly because she can clearly not read. Lol

  • this does work take for thee days i do it all the time

  • I have to do a test on 12 October please help me pass this test you guys I am trying to flush the THC out of my system do I have time I have niacin pills and I am starting to drink a lot of water now

  • Don’t do drugs in the first place.

  • Hello, I’m looking for suggestions to clean my system of Adderall. I’m on probation and the judge is Making me go cold turkey on all control substance.
    I bought 500mg Niacin flush-free and B12 1000mg per/tab
    My UA is on Tuesday.
    I’m 200 lbs in average shape,
    I drink 4-5 12oz bottles of propell a day.

  • Yes this method works and you need to start 3 days before the urine test at the absolute latest. If you try to do it two days before, one day before, or the day of, it will not work. Ive done this many many times and it’s always worked for me. But one time I got cocky and tired waiting 1 day before my drug test and I failed. I’d recommend starting 7 days before if you get tested on the same day every month.

  • Ues Madie it said take 1000 mg. the day of the test.

  • Niacin really works I smoked on Sunday and passed a test on Tuesday drinking lots of water and did a little bit of exercise and it probably took 9 pills of niacin spaced out overtime not all at once drinking a gallon of water before the test and urinating first don’t pee into the cup right away halfway then and then pee in the cup but I think the most important part is drinking a large amount of water but this is something I don’t recommend doing every week or month

  • I use niacin a lot to pass urine drug tests. It can be hard o. Your body but if you take enough for a week to ten days it will work. I am a heavy marijuana smoker. I stopped smoking 14 days before the test and took 3000mg of niacin for ten days straight. 1500mg at a time. It works well but make sure you drink LOTS of water just to be safe.

  • Will it help me pass a drug test today?

  • Will Niacin work if I mix it with Palo Azul? I test in 11 days. Eeek

  • This is exactly what I’m doing bro! Your making me feel so confident. I’m also taking mens multi vitamins with anti oxidants. I have a job interview/drug test on November 12th, and have not been smoking sense October 17th. I take 1500 mg a time, twice a day morning, and evening. I will continue the process until the day of my test, then will take a b12 vitamins to change my pee from highlighter greenish yellow, to normal yellow
    Wish me luck!

  • So I have a test tomorrow morning but I haven’t been smokin for 10 days I’m 6’2 and 150 y’all think I’ll be straight? I just started taking the niacin pills this am but I’ve been working out running and drinking water daily

  • Does it work for a nail sample drug test?

  • I haven’t smoke weed sense July 31st I am still testing positive will this help me flush my system completely of weed. And if so should I take 1500 mg a day and for how long…

  • does it work for blood test

  • Does this work for cocaine??

  • I’m 6’1 and I weigh 275 what are my odds if I have a test within 2-7 days?

  • If you go to your convenient store and look on the back of the energy drinks there are some with 1000mg of Niacin in like a 24oz can. Get 4 cans and take and start taking 2 Niacin pills a day about 5 days before your test and drink the energy drinks the day before you go in and the day of. I have never failed a test. You’re welcome

  • I’m trying to pass a drug test I’m on parole I smoke cocaine I stop on November 4,2018 my test is on November 7,2018! I’ve taking 1000mg since November 5,2018 about to take another 500mg this morning, drinking alot of water & cranberry juice, can I pass this test by November 7,2018? I’m 260 pounds 5’11!

  • If i took a Xanax this morning but I’m usually a everyday popper will I have good results on my test if im taking the niacin as recommended and drinking the correct amount or water and plus im using certo so will my system be ok?

  • I just smoked a few bowls of .meth yesterday and I took 7 niacin pills right after and I’m going to take 4 more when I get out of bed how long should I take the niacin I could be tested any day from now

    • I need to know how many days I have to take niacin for smoking a few bowls of meth yesterday? I took 7 niacin pills right after I smoked.and I’m going to take another 4 niacin pills right after I get out of bed today I’m on phase testing for federal probation once a month don’t know when I’m going to be called for testing it could be any day

  • I have a military drug test coming up. I smoked on the 7th and the test the 13th. I am a regular smoker but not a heavy one. if I consume 1500mg the next 3 days, drink a Qcarbo32 on the 10th, exercise everyday and take one niacin the day before. will I pass?

  • I may have to start testing in a month. Heavy user. I. 5 foot 9 inches and roughly 182lbs. How long before my test should I start using this method? I haven’t been smoking today just cuz I am needing to start to detoxing.

  • so i have a test in 13 days i read the article i have alot of weed just around the house i havent smoked in 5 days do i even need the niacin i am 275lb//////what shuld i do

  • I’m a heavy smoker and I’ve tried all the type of detox that does not work now I’m in the court system and having to drop twice every week is niacin something that I can use I smoke a blunt in the morning I smoke a blunt in the afternoon and one at night for these pills work for me

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