Niacin Flush Detox Method

Niacin Flush Detox

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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. 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

  • Skin flushing
  • Burning sensation
  • Swelling
  • Reddening of skin
  • Skin lesions or hives
  • 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.

Addiction Resource team does not encourage to use any of the methods for speeding drug cleaning, especially if it is performed for faking or cheating drug screening results.

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 oneself.
  • Abstain from drugs and alcohol, to prevent negating the effect of niacin pills.
  • Eat light meals and stay away from fatty foods.


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, 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.

View Sources
  1. Jacobson T. A. A “Hot” Topic in Dyslipidemia Management—“How to Beat a Flush”: Optimizing Niacin Tolerability to Promote Long-term Treatment Adherence and Coronary Disease Prevention. Mayo Clinic Proceedings. 2010; 85(4): 365–379. doi:10.4065/mcp.2009.0535.
  2. Kamanna V. S., Ganji S. H., Kashyap M. L. The mechanism and mitigation of niacin-induced flushing. International Journal of Clinical Practice. 2009; 63(9): 1369–1377. doi:10.1111/j.1742-1241.2009.02099.x.


Leave a comment

  • Jace B
    It works ! I’m about 5’10 & 150lbs . I had to take a drug test and I forgot so when the day came I took three niacin pills , and it worked. However ideally I would have taken two pills for five days up until the day I had to test . However I forgot that’s why I took three.
    • Caleb Larson
      I’m looking at your post man we’re the same height an weight an you only took 3 on the day of the test how long before the test did you take them
  • Renee S.
    So I have to pass a drug test Friday, mind you I haven’t smoked in 75 days. I’m 5’6 and 280 pounds. I took one pill and didn’t like the way it made me feel. I think I’ll continue to not indulge and hope for the best.
    • Casreal
      If you haven’t smoked in 75 days there shouldn’t be anything in your system anyways.
  • Debra D Downey
    I have a drug test on wed I have been taking the. Nican since Friday 1 time a day what do I have to do next plz some tell me
    • Triston Bowie
      Drink water lots of water
      • April
        I have to take a drug test in less than 24 hours but I’m not a heavy smoker and the last time I smoked was 4 days ago. Will the niacin flush work?
  • Gail
    I read an article just before this one that said if a person is to take slow release niacin or to spread the niacin out that that could cause liver damage and that it is better to take them all together at the same time. I find this bit disconcerting and confusing. Sincerely, Gail
    • Paul. Foster
      In highschool I passed 100 percent of my tests. I don’t remember how many I took but it was all at once usually the day or two before the test. Thinking I took 5 Pills at once and had a gallon of water that I downed over the next couple hours.Mind you if you do this please make sure the niacin doesn’t interact with any prescription medications you’re taking. Your face will get super red and is a little painful. Your whole body will feel and look flushed and itch badly for a couple hours.We did this in highschool and I was young and in shape so I guess it depends on a lot of factors. Maybe start off with double what the bottle says and up it from there. Takes about an hour to kick in so be safe if you don’t feel anything. Use at your own risk!
  • Ray
    I only took one niacin pill Sunday and I passed my drug test Monday all I did was drink a gallon and a half of water.
    • Asking ForaFriend
      But were you a heavy “drug” user before the test?
    • Corrie
      For what kind of drug and what kind of test
  • Dexter
    Does niacin flush out from everywhere like hair follicles too.
    • A
      Hair is dead skin cells, so whatever is in them stays in them.
  • Nikki
    Im over 300 pounds if I take niacin right now will it work for a test tomorrow I’ve already been drinking water and about to drink cranberry juice will it work
  • Charles Mccloud
    I’m 350 will work for me if my test is tomorrow and I started at 4 o’clock this afternoon drinking plenty of water plus niacin
  • Dave
    I’m 6’1 135 w/ only 7% body fat I haven’t smoked in 4 days but only once or twice a day for about a week but it was a dab pen will I pass my test today
  • Theresa Pedraza
    Wondering if it worked if so how many pills did u take and how long did u take them before your test
    • Trasharria Mitchell
  • Mia
    If you used cocaine 72 hours before taking niacin what are my chances of passing a drug test in 24 hours?
    • Casreal
      Cocaine stays in your body 3 to 7 days after last use. If your a heavy user and have a high body mass index (overweight) you can expect for the drug to stay longer.