Reviews of Nitric Oxide Muscle Building Products

Our Nitro XL testers reported fast muscle gains and improved strength and stamina. In short, they felt like they were getting more from their workouts, and many said they were able to push their bodies much further than they ever had before. Nearly every one of our testers said they planned on continuing to use Nitro XL in the future. This was the best product we tested, and we give it a MUST BUY rating.

XtremeNO proved to be a pretty effective muscle building supplement. Users said they felt like they were building muscle more quickly, and they had more stamina to extend their workouts and hit the gym more often. It was the second most effective product we tested, so we gave it a tentative buy rating.

Force Factor was an interesting product. Some users reported experiencing slight increases in strength, stamina, and energy, while others felt it wasn't working at all. In short, it was a mixed bag of results, making it clear that Force Factor is spotty at best. It's certainly not a bad product or the worst out there, but we can only give it a do not buy rating based on its inconsistent performance.

NO-Xplode simply didn't get the job done in our testing. The formula just didn't seem to have any effect on users, and it never really got any better. It was a disappointment because we had seen NO-Xplode around the web before and heard its bold claims, but from our analysis, this nitric oxide supplement is a dud. We give it a do not buy rating.

Despite this product's heavy advertising tactics and celebrity endorsement by Mike "The Situation", NoxEdge Pre-Workout Tablets simply fail to deliver. This product claims to dramatically boost your muscle pump and load capacity, but our consumer test panel begs to differ, with less then 10% having experienced any improvement to their muscle-building efforts. We strongly stand by our do not buy rating for NoxEdge.

XtremeNO Nitric Oxide Supplement

Rated: 85 out of 100
by Product-Critic.com

Nitric oxide supplements have exploded in popularity in the fitness community. That’s because fitness experts understand that nitric oxide is like fuel for muscles. And if you can safely increase nitric oxide levels in the blood, you can increase your strength, boost your endurance, and maximize your muscle size.

But as you well know, not all nitric oxide supplements produce the same level of results. At Product Critic, we’re committed to helping you find the best supplements for your needs.

In this review, we’ll be taking a look at XtremeNO. This nitric oxide supplement makes the usual claims. It says that it provides fast post-workout recovery, increases strength and muscle growth, and improves over fitness.

But does XtremeNO really work? Keep reading our review to find out!

Price Overall Score Muscle Growth in Inches: Increased Muscle Pump? Improved Stamina? Rating
Nitro XL $94.95


10-15 Yes Yes Must Buy
XtremeNO $89.00


8-12 Yes No Tentative Buy

About XtremeNO: Ingredients

If XtremeNO is to deliver the results it claims, it had better have some good ingredients to back it up. Let’s take a closer look at the XtremeNO formula.

XtremeNO main ingredient is L-Arginine. L-Arginine is supposed to transform into nitric oxide and help the blood vessels relax. Additionally, XtremeNO ingredients include a range of amino acids that help deliver oxygen to muscles. With more oxygen in the muscles, more muscle growth should occur.

XtremeNO Pros and Cons

XtremeNO has a pretty solid formula, and it performed fairly well in our tests. Many users felt that it helped with their post-workout recovery, and several said it helped them put on muscle more quickly. They thought it was a fairly effective product that had some positive benefits.

Based on the feedback received during testing, the XtremeNO pros are:

  • Moderately effective
  • Includes a free trial
  • Uses natural ingredients

Of course, XtremeNO does have some cons:

  • Inconsistent performance
  • Slower results than some other products we tested

XtremeNO: Overall Rating

With all of this information to consider, what’s our final verdict on XtremeNO? We’ve decided to rate this nitric oxide supplement as a tentative buy.

While we do believe that XtremeNO does get some good results in certain cases, it also has an inconsistent performance. Not all of our users felt that it was working for them, so we couldn’t give it our top rating.

However, XtremeNO does offer a free trial, so if you’re interested in trying it, you have nothing to lose. Just make sure you read the terms of the free trial before signing up so that you understand your responsibilities.

If you’re interested in an alternative, we suggest our top-rated product Nitro XL. Learn more about Nitro XL today!