Does Niacin clean your system of THC for drug test?

Dale Porter
By Dale Porter

MPH, Certified Substance Abuse Counselor, Certified Health Education Specialist

Updated: 2023 Dec 20

Niacin can help you to pass a drug test the same day, but it does not clean THC from your system.

On the contrary, it prevents THC from being released from your system, thus you are able to pass a drug test.

But the health risks of using niacin are not worth it. We’ll tell you how niacin works and why some people use it to pass a drug test.

We’ll also tell you about the safe and FREE alternative to Niacin, so you don’t risk your health,


Niacin overdose can cause severe damage to your health. Dozens of cases when people ended up in hospital after using niacin to pass a drug test.

We don’t recommend using it. The information provided in this article is just for informational purposes only.

How niacin helps to pass a drug test

Will skip the detailed explanation of the physiological process and tell you briefly.

Niacin blocks hormone-sensitive lipase and block the breakdown of body fat. And that’s the most important effect of Niacin in our case.

To understand how this helps to pass a drug test we need to remind that about 70% of THC from the blood is taken by the fat cells.

When your body breaks those fat cells, the THC is released back into the blood and then excreted with the urine.

This process is very slow, that’s why it takes so much time to detox from THC. You need to break down most of the fat cells, containing THC molecules.

And that’s why THC is detectable by a urine test for such a long time.

When you use niacin, your body stops breaking down the body fat and no more THC is released into the blood and excreted with urine.

So, the number of THC metabolites in the urine decrease below the detectable level and you can pass the test.

Does Niacin Detox THC?

No! As we already said, niacin stops THC from being released into the blood and excreted with the urine. So it only makes THC to stay longer in your body and prevents natural detoxification.

Niacin health risks

Overdosing of Niacin has severe side effects and causes liver damage. So you can end up in hospital. Is it worth that?

The most common side effects are flushing: warmth, redness, itching, or tingling of the skin. This may feel uncomfortable, but it is not serious.

If you take nicotinic acid as a medication in doses of 1,000 or more mg/day, it can cause more severe side effects, including:

  • Low blood pressure (which can increase the risk of falls)
  • Extreme tiredness
  • High blood sugar levels
  • Nausea, heartburn, and abdominal pain
  • Blurred or impaired vision and fluid buildup in the eyes

Studies confirming health risks of using Niacin to pass drug test

Niacin can be harmful when taken in large amounts or for reasons other than its intended medical use, as shown in the studies.

In this study, a person’s liver was damaged after taking too much sustained-release niacin. Their liver enzymes were significantly increased but returned to normal after they stopped taking niacin. This tells us that niacin can be toxic to the liver when taken in high doses.

In Study 2 ( ) , a young man took a very large amount of sustained-release niacin in an attempt to pass a drug test. This caused a range of serious problems like confusion, fever, kidney failure, anemia, and blood clotting issues. This case demonstrates that niacin overdose can lead to severe toxicity affecting multiple parts of the body.

Study 3 ( looked at people who used niacin inappropriately to try and cheat on drug tests. Some experienced adverse reactions. Although the specific reactions were not mentioned, it suggests that taking high doses of niacin for nonmedical reasons can have harmful effects.

In summary, these studies show that niacin is toxic when taken in excessive amounts or used improperly. It can harm the liver and cause various complications. It’s important to use niacin as directed by a healthcare professional and avoid misusing or taking too much niacin to prevent potential toxicity.

Safe and free alternative to Niacin

As we already explained the role of niacin is to block the breakdown of body fat. This can be achieved just by eating…pizza!

Or you can drink a glass of coke, or eat a chocolate bar. Anything that contains carbohydrates or sugars.

It will raise the insulin levels in the blood and thus stop the breakdown of body fat cells.

As you see, the effect is the same, but there are no risks for your health.

Is that enough?

Indeed, indulging in carbohydrate-rich foods can help in passing a drug test. The reason? These foods prevent THC, the active compound in marijuana, from being released into your bloodstream. But, that’s only half the battle.

Flushing out metabolites with water

Yes, you’ve halted the release of THC into your blood, but it’s still lurking around in your bladder. That’s right, it’s hiding there, ready to be detected in a drug test. What to do then? Well, you need to rinse it out from your system.

Risks of diluted urine

To do this, you must drink 1-2 liters of water. That’s right, just water. This process will induce frequent urination and flush out the metabolites – THC and its buddies – from your bladder. The goal is to get the concentration of THC in your urine below the detectable level.

Restoring urine parameters

But here’s the catch. By doing this, you’re also flushing out important nutrients from your bladder. Consequently, the urine parameters like specific gravity and creatinine levels will alter, and guess what? This can be detected during a drug test. Your urine might be dismissed as diluted.

To restore these parameters, you need to replenish your body with B12 vitamins, creatine, and isotonic drinks. This can help retain the natural composition of your urine, reducing the risk of it being rejected.

The easier alternative: Fast Marijuana Detox Kit

Now, is there an easier alternative to pass a drug test quickly?

Well, yes. Enter the Fast Marijuana Detox Kit from Green Fleets.

fast marijuana detox kit

This kit is the superhero in the world of passing drug tests. It’s fast, effective, and guaranteed to get you through a drug test within 60 minutes. Yes, you heard that right, just 60 minutes.

Undetectable and effective

Using this kit, your urine will be free from THC for up to 5 hours. During this time, you can confidently undergo a drug test, knowing you’ll pass.

What’s even better? The labs won’t know you used this kit. It’s a secret weapon that’s completely undetectable.

No need to quit marijuana

And no, you don’t have to quit using marijuana. This kit has you covered.

Risk-free purchase

Plus, if you’re not satisfied, there’s a money-back guarantee. A product that’s effective, risk-free, and backed by a guarantee? That, my friends, is what you call a win-win situation.

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Official Disclaimer: The information provided here is intended for educational purposes only. The scenarios and information provided herein are entirely hypothetical and are meant to serve only as an educational resource. Under no circumstances does this organization endorse, advocate, or encourage the application of synthetic urine or other products for illicit or unethical activities. We emphasize the paramount importance of strict adherence to all legal and ethical standards. Readers are implored to ensure that any actions they undertake as a result of this information are in complete conformity with the governing laws and medical guidelines of their jurisdiction.