Updated: 01/15/2018

Nitrox II Review - 5 Things You Need to Know


In the weeks that led to this review, I figured out whether Nitrox II actually works. We at DietSpotlight conducted a thorough investigation, scrutinizing the ingredients, side effects, customer-service quality and scientific studies. We also looked closely at dozens of user responses and remarks from all over the web. Finally, we summarized and compressed all of the data we collected to give you the facts you need.

Nitrox II Readers: Click here to find out why we're giving away samples of our product, Boost.

What is Nitro II?

To begin, Nitrox II is claimed to increase muscle pumps, improve workout performance and aid with weight training. The ingredients include AKG, citrulline malate, vanadyl sulfate, alpha lipoic acid and l-taurine. You simply take 1-2 softgels twice daily. It’s best to take this formula 30 minutes before workouts. It is mainly marketed at men, but can be used by women as well. However, from what we gathered, this product has been discontinued by the manufacturer.

The company that makes Nitrox II softgels is Sci-Fit Sports Nutrition, LTD, which is located in Tampa, FL. This fitness supplement is made in the USA. Also, there are some positive user comments posted on the web, but read on…

Products Similar to Nitrox II

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Lack Of Availability – “Does Anyone Carry It?”

The first concern we have is lack of availability. “After doing some searching, it is clear that Nitrox II has been discontinued. We could not find it on common dealer websites like Amazon and bodybuilding.com,” mentioned our Research Editor.

One customer stated, “Tried this stuff a few years back. From what I can tell, it has been discontinued. Can’t even find it on eBay.”

Then again, a different person posted, “Not a bad product, but I think it was taken off the shelves back in 2012.”

Another revealed, “Used this one for a few weeks. It did improve my pumps a bit. No noticeable Nitrox II side effects either.”

Minimal Results – “Uh Oh”

Another issue is minimal results. For example, one customer reported, “Okay, I used Nitrox II for two months and I don’t see a real difference. Won’t buy it again.”

However, a different person said, “It’s not bad overall. Take it before workouts as directed. It does give me good pumps.”

“Not the best I’ve tried, but it’s alright. At this point, you can’t even find it though,” mentioned another.

Our research has revealed that if there’s a particular part of a fitness supplement or testosterone booster that is especially burdensome (lack of availability, minimal results, high cost) the likelihood of long-term success is slim. In other words, if Nitrox II is in fact impossible to find online or in stores at this point, this is a serious problem.

The Science – “Is There Any Provided?”

We at DietSpotlight need to see some published research that backs up the supplement we’re reviewing. However, we could not find any solid studies that support Nitrox II softgels and the marketing claims presented online. Therefore we cannot get behind this formula.

The Bottom Line – Does Nitrox II Work?

Okay, now the moment you’ve been waiting for. This is our bottom line on Nitrox II. Firstly, we like that this fitness supplement is made in the USA. It’s also good to see that some positive user comments are posted on the web. But we have some reservations about this workout formula because it’s not supported by any clinical studies. Also, we’re concerned about this product’s lack of availability.

If you really want to increase physical performance, build lean muscle mass and improve vitality, we recommend you go with a product that’s supported by documented research, is easy to purchase online and is backed by positive user feedback.

Among the best products we’ve seen this year is one called Pronabolin. This powerful formula offers nine key ingredients. These have been clinically tested and are shown to help increase natural testosterone levels, boost workout performance and improve overall muscle strength. We have not found any user complaints, and customer feedback posted on the web shows people are seeing excellent results.

The makers of Pronabolin are so excited about their product they’re offering every customer a 120-day money-back guarantee and multiple-bottle discounts.

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Nitrox II

What are the ingredients in Nitrox II?

Nitrox II only includes 5 ingredients: Citrulline Malate, Vanadyl Sulfate, AKG, I-taurine and Alpha Lipoic Acid.

What are the side effects of Nitrox II?

There are no known side effects of Nitrox II.

How do I know if Nitrox II is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Boost, with scientifically backed ingredients.

Click here to get your sample of our powerful testosterone booster today.

Does Nitrox II work?

From reports, the product seemed to work and do it’s job, but it has been discontinued from production for a few years now.

What is the price of Nitrox II?

The Sale price is $42.99 per bottle of 180 soft gels.

Where can I buy Nitrox II?

You can buy Nitrox II at various places online including BodyBuilding and All Star Health. It is still listed on the sites mentioned but on a few there is a note that says it’d been reported as being discontinued.

How should I take Nitrox II?

You take 1 or 2 capsules twice a day.

How do I contact Nitrox II customer service?

There isn’t currently a way to contact customer service.

Can I return Nitrox II?

No, it’s been discontinued.

What are the most common complaints about Nitrox II?

The most common complaint for the product is the fact that it has been discontinued and can no longer be found to purchase on sites like Amazon and eBay.


Previous Nitrox II Review (Updated April 25, 2011):

What You Should Know

Nitrox II by Sci-Fit is a nitric oxide booster for increased muscle gains and bodybuilding support. The official website lists all ingredients in the formula and amounts for each ingredients. This is a huge positive for Sci-Fit as many companies try to hide ingredient totals to fool consumers. There are only a few ingredients in the formula and all are listed with familiar names. It is common for bodybuilding supplement companies to list common ingredients with scientific names to make the supplement appear more impressive. We like simple and to the point, but do the ingredients really boost nitric oxide?

List of Ingredients

AKG (Arginine Alpha-Ketoglutarate), Citrulline Malate, L-Taurine, Alpha Lipoic Acid and Vanadyl Sulfate.

Product Features

Sci-Fit Nitrox II combines ingredients to increase natural production of nitric oxide and increase cell volume. The two main ingredients in the formula are Citrulline Malate and AKG. Both are used to promote nitric oxide levels, but Citrulline malate goes beyond that to promote increased levels of L-Arginine in the blood compounding the nitric boosting effects. L-Taurine helps increase pump during the workout and Alpha Lipoic Acid helps bring all the ingredients to cells quickly and efficiently. ON the whole, the supplement formula is sound, but the reviews of the product are often more convincing than the ingredient list.

Reviews of Nitrox Ii are spectacular. Users claim they feel a better pump and increased energy when using the supplement before a workout. In addition, on off days when the supplement is not taken, muscles feel stronger and that extended pump tends to carry over.

Weight loss is not supported by any of the ingredients in Nitrox II, so the dieter will not gain the same benefits a bodybuilder or weight lifter would from the formula. The company does not claim to boost metabolism or increase fat burn.

Nitrox II sells for $35.99 from outside websites and $29.99 from Sci-Fit. This is one of the first supplements that sells for less from the manufacturer.


  • Sells for less from the manufacturer than outside websites.
  • Ingredients effectively increase nitric oxide levels and muscle pumps.
  • Cheaper than other NO supplements.


  • Does not promote weight loss.
  • The supplement is not created for the average dieter.


Nitrox II is a nitric oxide supplement that bodybuilders and weight trainers love. The ingredients help the user feel stronger pumps and more energy, which is the sole purpose of the supplement. There are no stimulants in the formula, so energy production is linked to all-natural ingredients. We suggest dieters use a different formula for weight loss as none of the ingredients in this supplement have an effect on metabolism. Green tea, chromium and caffeine are three proven weight loss ingredients.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

8 Nitrox II Reviews

  • Robert

    What would be a good weight loss suplements can be safe to use with nitrox2? Is nitrox 2 a safe

    • Maribel (Editor)

      Hi Robert! Please make sure to consult with your physician before starting a new product to make sure it is safe.

  • sikander

    With beverage or drink I take

    • Everly

      Hi! For detailed product and usage instructions, please refer to the Nitrox II official website for more information.

  • Best time to use this
    shovan roy

    When I should use nitrox? Preworkout or postworkout or both?

    • jo

      Try it before the work out and see if you have more energy

  • Safe for Teens OR Not

    Is nitrox in safe for teens?? Anybody know? I’m trying to gain weight/muscle

    • JULES

      It is very safe, you will gain muscles in ur face.