Updated: - Site operated by Pronabolin

Force Factor Review - Does This Supplement Work? Are trick "free" trials and side effects deal breakers?

By Summer Banks on Sep 05, 2016
Force Factor Review

I recently started hearing a lot of buzz surrounding Force Factor, a dietary supplement that supposedly builds lean muscle quickly. Its claims sounded too good to be true, so we decided to do an in-depth review of the ingredients, side effects, clinical research, and customer service. We even read through every forum we could find to see what people are saying. Finally, we condensed it all to give you the info you need.

EDITOR'S TIP: Click here to combine Force Factor with a proven testosterone booster such as Pronabolin for better results.

What is Force Factor?

Let’s jump right in: Force Factor’s headlining ingredient is “Advanced 3x Nitric Oxide Booster,” which is composed of A-AKG, A-KIC, and L Arginine Monohydrate. The “Advanced Nutrient Delivery System” rounds out the supplement, and it includes Calcium Phosphate and L-Citrulline. Each container comes with 30 servings, most of which are taken on workout days. When used as instructed, the formula is supposed to build lean muscle, promote endurance and maximize strength.

Force Factor is a Cambridge, MA-based product that came into existence in 2009. It was founded by two Harvard rowers, but the facts surrounding the company’s founding isn’t available. You can order online via the official website. We like the ease of use, and the formula for nutrient delivery seems original and interesting, but read on…

A Concern – “Is the ‘Free Trial’ Really Free?”

First off, after looking through a series of online reviews, it looks like Force Factor uses its “Try It Now” option to get people signed up for recurring shipments–all without users knowing. “No matter how interesting a dietary supplement may be, tricking people who are willing to try your product is not a good business practice,” said our Research Editor.

“I received the small sample, and then they sent me a month’s supply. I never acknowledged a full bottle or even accepted the credit card charge,” one user claims.

He wasn’t the only one. “I just ordered a free sample. After that, why are you people deducting money from my account and sending me Force Factor every month? I didn’t order anything,” said another. Confusion over the auto-shipping from Force Factor seemed to be a recurring theme.

Side Effects – “Does it Cause More than it Claims?”

Besides the annoyance over shady business practices, the formula doesn’t always dish out the great results it promises. In fact, many users claimed to have Force Factor side effects. “I regret taking this product because of the side effects that show up as follows; inner ear problems, vertigo, joint problems like carpal tunnel, stomach problems and the fun one when you first start a high dose then stop.”

“My blood pressure went out of whack,” said another. “So I’m not going to be taking it anymore. I didn’t feel it do any good.”

“It doesn’t make any real difference in workouts at all,” said a third reviewer.

We’ve noticed that even a small side effect can hinder a supplement’s long-term success; users simply don’t want to put up with reactions or a lack of results. Furthermore, if Force Factor is making returns and auto-shipments a pain to deal with, customers would probably be better off looking elsewhere.

What Does the Science Have to Say?

The NIH features many articles discussing the benefits of Nitric Oxide, but we can’t find any published clinical studies supporting Force Factor itself. The website claims that the supplement has been clinically studied, but why wouldn’t they mention the institution or individuals involved in the research? Without any verification, it’s hard to support a proprietary blend of ingredients that costs $60/month.

The Bottom Line – Does Force Factor Work?

I’ve reviewed a lot of supplements, and Force Factor initially had me interested with it’s approach to lean muscle building. It seems to avoid many cliche ingredients, and it’s easy to use. The shady use of auto-shipping doesn’t sit well, though, and some of the side effects mentioned online should be discussed on the website.

If you’re still in the market for a supplement that will promote lean muscle, there are options out there that have more scientific backing than Force Factor and fewer side effects.

Among the best products we’ve seen in 2016 is one called Pronabolin. A supplement made from a proprietary blend of nine powerful ingredients. These ingredients have been shown, via clinical testing, to support testosterone production and muscle growth and we can’t find talk of harmful side effects online. Better yet, the online reviews look great.

For the time being, there are multiple-bottle discounts and a 120-day money-back guarantee: this is a company that stands by its product.

Learn More About Pronabolin »
About the Author:

Summer Banks has researched over 5000 products in the past 10 years. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

How Does Force Factor Compare?

Previous Force Factor Review (Updated September 20, 2012):

What You Should Know

Force Factor, a sport nutrition product supposedly invented by Harvard competitive rowers, uses amino acids as the basis of its technology. According to the manufactures, these amino acids increase energy and endurance and aid in weight loss. This process is supposedly achieved through raising the amount of Nitric Oxide in an individual’s body.

List of Ingredients

Some of the main ingredients in Force Factor include 3x Nitric Oxide Booster, AKG, A AKIC and L Arginine, and L-citrulline. Three of the most active ingredients are Nitric Oxide, Arginine, and L-citrulline.

Product Features

Nitric Oxide, naturally found in your body, helps your body properly communicate with all its different parts. By raising the amount of Nitric Oxide in the body, exercisers may increase their bodies ability to communicate itself and therefore they may find their workouts more successful.

Argenine, not a naturally occurring substance within the human body, may help strengthen immunity, remove toxins from the body, regulate sodium levels, assimilate protein properly, and increase metabolism.

L-citrulline, an amino acid, supposedly shortens the recovery times after workouts, helps increase energy, removes ammonia from the body, and benefits the liver.

See Our Featured


  • The company claims their product does not cause harmful side effects.
  • Supposedly claims ingredients which help improve the success of a workout.
  • An official Force Factor website makes ordering the product easier.


  • Despite the claims that Force Factor does not cause harmful side effects, users should exercise caution. Introducing any foreign substance into the body will cause some sort of change within.
  • This product cannot replace proper exercise and a sensible diet.
  • The official site has a limited selection of before and after photos. Photos seem focused on after results without much emphasis on the before physique.
  • Many people claim that the company’s free trial period offer is, in reality, a scam.
  • A bottle of Force Factor costs $69.99, a price out of the range of many individuals.


Force Factor may, as the company claims, truly improve workouts. However, as with many workout and weight loss supplements, it may owe its popularity to a few isolated successes and not because it truly lives up to its claims. Even if the supplement does assist in muscle gain and fat loss, the possible side effects could negate this positive. Although the company claims it has no side effects, any substance introduced into the body will have an effect on it. The more unnatural the substance, the more likely the effect will be bad. Fitness fanatics and those wanting to lose weight should focus on more sensible methods such as following a healthful eating plan and exercising consistently. Those still interested in Force Factor should do their own research in order to make an informed opinion before buying.

Force Factor Questions & Answers:

We sorted through hundreds of user comments about Force Factor to write this helpful FAQ.

What are the side effects of Force Factor?

Force Factor side effects, based on some dieter reviews, could include headache, nausea, and body pains.

What are the ingredients in Force Factor?

Force Factor ingredients are Arginine-Alphaketoglutarate, Arginine-Ketoisocaproate, L-Arginine Monohydrate, Calcium Phosphate, Di-Potassium Phosphate, L-Citrulline Monohydrate, Magnesium Stearate, Nicotinamide Adenine Dinucleotide, Green Tea Extract, Testofen, and Caffeine.

Does Force Factor work?

The green tea extract and caffeine can work to increase energy and Testofen (fenugreek extract) is associated with positive effects on glucose and cholesterol levels and improvements in resistance training. However, there is no strong connection to weight-loss or testosterone production.

If you’re looking to build muscle faster, we suggest a product with clinically-tested ingredients like Pronabolin.

How much does Force Factor cost?

Force Factor products cost between $50 and $80.

How should I take Force Factor?

There are multiple products available from Force Factor. You must read the label before taking the supplement to ensure you’re following the directions accurately.

Can I take Force Factor if I have a health condition?

You should ask your physician if you have health problems, are under the age of 18, pregnant, nursing, or taking prescriptions.

What do users like about Force Factor?

Users like that Force Factor increased energy and that you can order direct from the company.

What do users NOT like about Force Factor?

Users don’t like the customer service experience and the prices of Force Factor products.

How do I contact Force Factor customer service?

You can contact Force Factor customer service by calling 1-877-204-3263 or using the contact form on the official website.

Does Force Factor come with a guarantee?

Yes, Force Factor has a 30-day money back guarantee.

I don’t have a card, can I buy Force Factor with cash?

You can’t pay for Force Factor with cash online but you can visit your local GNC or supplement store that carries Force Factor products.

Do you know of any special deals or discounts on Force Factor?

We were unable to find any special deals or discounts on Force Factor supplements.

What we did find is a strong, effective testosterone booster that can work to improve muscle development and strength. Pronabolin, which is available with multiple-bottle discounts and a 120-day money-back guarantee, has amazing reviews. Click here to give it a try.

Force Factor Side Effects:

We want customers to know everything, the good and the not so good, about the supplements we review. In the case of Force Factor, we found a few reports of side effects, though they are very rare.


“It did nothing for me but upset my stomach.”    Andy


“Causes stomach bloating if taken in large amounts.”    Chuck


“I’m fatigued. My muscles are tired.”    Jackson


“It gave me headaches had to stop taking it.”    Jim


“This item got me very ill. My doctor told me to stop using it. It is not good product.”    Victor


“I had a terrible pain…it felt so painful that I couldn’t even walk so I stopped taking the product the next day.”    Peter


“Gets me dizzy like the caffeine based products.”    Dominik


“I find myself always wanting to go to sleep after taking these.”    Thomas


“Gave me a slight fever and painful sore throat, nothing great in terms of gains at the gym.”    Mark


“Causes side effects such as stomach cramps and nausea.”    Brian


“A week ago I got Force Factor. I dreaded the soreness part.”    Doug


“I find Force Factor to be the worst of the bunch. Stomach issues, and jittery feelings.”    George


We’re all about finding clinically tested ingredients to help the user by boosting energy, muscle growth and fat loss. In 2016, the one that we like best is Pronabolin. Based on customer reviews, users are sold on it too.

Just click here to learn everything about Pronabolin today.

We dug deep into the Force Factor ingredients to give you the details you need.

L Arginine Monohydrate

L-Arginine is a non-essential amino acid, meaning the body can make it.

What is it Supposed to Do?

It may play a role in the treatment of cardiovascular disease because of its anti-antrogenic anti-ischemic and anti-thrombotic properties. It is also promoted as a growth stimulant, and a treatment for erectile dysfunction.

Clinical Research

According to a study published in Nature, “We now demonstrate that NO can be synthesized from L-arginine by porcine aortic endothelial cells in culture. Nitric oxide was detected by bioassay, chemiluminescence or by mass spectrometry.”

Clinical research is necessary when choosing a dietary supplement for any purpose. You may want to take a look at a product like Pronabolin, which is formulated with scientifically-tested ingredients.

Calcium Phosphate

This is the chemical combination of calcium and phosphorus.

What is it Supposed to Do?

Several forms exist, and they all play different roles. One type helps keeps your bones and teeth strong, while other forms are used in food and baking products.

Clinical Research

According to a study published in Injury, “Calcium phosphate (CaP) compounds are becoming of increasingly great importance in the field of biomaterials and, in particular, as bone substitutes. Recent discoveries have accelerated this process, but have simultaneously rendered the field more complicated for the everyday user.”


This is another non-essential amino acid, which means your body can make it.

What is it Supposed to Do?

It boosts nitric oxide production in your body to help the arteries relax and work better.

Clinical Research

According to a study published in The Journal of Biological Chemistry, “These results indicate that the ureido oxygen of the L-citrulline product of macrophage NO synthase derives from dioxygen and not from water.”


Also known as Arginine Alpha-Ketoglutarate, this is a non-essential amino acid necessary for making nitric oxide in the liver.

What is it Supposed to Do?

It is useful in the treatment of kidney disease, stomach and intestinal disorders, liver problems, and cataracts. It is also used to increase libido and help prevent erectile dysfunction.


Also known as arginine ketoisocaproate, this is a non-essential amino acid.

What is it Supposed to Do?

It helps to produce nitric oxide in the body.

Is There Anything Out There That TRULY Works?

We have our eye on a supplement that fits the bill. Pronabolin, which is made with ingredients that HAVE been scientifically tested, may be a good solution. All customers can take advantage of a 120-day money-back guarantee and multiple-bottle discounts, currently available from the manufacturer. Click here to give it a shot.

17 User Reviews About Force Factor

Leave comments below
  • 1
    Jessie B.

    Have used this new product volcano and the other force factor. it works but side effects is not worth it; headaches and problem sleeping through the night with bad dreams of can find my car. something like that dream of falling of a cliff and can;t wake up in time. high blood pressure or high pretension, anxiety.. it does help out in the gym and body building but at what cost. i have been taking three to four capsules a day for two weeks now. i am quitting. it is not worth the side effects. not sure; they must do more research. i am a very athletic 59 year old. hopefully this was helpful


  • 2

    Tell me this ingredient Nxo explosive what is this made of Please be specific


    Karen (Editor)

    Hi Rudolph, Nitric Oxide, Arginine, and L-citrulline are the most active ingredients.


  • 3
    George Dankwa

    please, i just want to know the side effect of force factor on the kidneys


  • 4
    George Dankwa

    Please, i just want to know the effect of force factor on the kindneys


  • 5
    Jack Kindle

    I ordered another product{test x180} and had to return it because of its alergic effect on me. I have tried the force factor prdunt and found the same thing ,I can,t take it, I would like a refund on this product and don,t ship anymore thanx


  • 6
    Reid Brendeland

    It’s obvious that the models used to promote Force Factor use steroids to acheive their results.


  • 7

    I tried a few of the force factor products. Every time I called to cancel one do to no difference in my workout, they offered to send me a free trial of another product. I naturally accepted hoping to find a supplement that would work. One free sample never arrived, so I called and they said they had no record which was fine. I was just charged however with a full order for that supplement because they said that I never cancelled. I am EXTREMELY dissatisfied with all of their products and the shitty attitude that they took with me when I asked them to cancel everything. I would NEVER recommend any force factor product to anyone since they do not work and they charged me for a sample that I never got and had supposedly never ordered.


  • 8

    I took Force Factor’s NO booster as directed. It definetly boosted my energy levels, and my wokouts were great. It is available at GNC for <50.00. I got the free trial -after- trying the product.

    I -always- look for those darn auto-buy things. I hate them, and wish FF would cease such unseemly activity. SStill, if you call them you'll get FF at a great price.


  • 9
    thomas yoho

    I got tottally scammed into the auto-buy plan. Beware of tthis kind of sell for geed type telrmarketing. Just because time are difficult for us all, doesn’t mean you have to resort to unethical measures. As Americans we shold be working together to get our geat country restored to it’s past “old glory”


  • 10


    Remember you paid 4 bucks for free trial.. keep an eye on your CC statement they will continue to bill you every month if you don’t call them.. this shit is exspensive do your research bro just helping you out


  • 11

    I just received a bottle of force factor in the mail and all I paid was 4 dollars for shipping. I haven’t taken it yet, can anyone who has taken it tell me the pros an cons of the product?


    Larry Patricelli

    I started taking it last week. I started with 1 at breakfast and then 1 at lunch
    after 3 days i went to 2 at breakfast and 2 at lunch, i am not joking, i have had atleast 10 people ask me this week if im working out and telling me how good i look, this product is great, i feel strong, after working out i dont get sore muscles , i just want to keep going, it truly is working, the only possible side affect i had was a bad headache on the second day but then again i cant say it was because of the force factor, all in all i love it and would highly recommend it to anyone.


    Bernard Withers

    how long did u wait until u received your stuff?


  • 12

    can woman take this



    Absolutely. It helps with energy for workouts= better workouts= better results: definition toneness, etc.


  • 13

    I totally agree that those wanting to lose weight should focus on more sensible methods such as following a healthful eating plan and exercising consistently ,instead of using substance whih are not found in vegetables or natural herbs provided by nature.


Have a comment or question about Force Factor?