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Former Harvard University Rower

Average customers should expect disparate results.

As teammates on the Harvard Championship Crew team ('04-'06), the founders of Force Factor were looking for a healthful product that would increase both their endurance for long workouts and their strength for sprints. They tested many products. Some were loaded with caffeine and unnecessary additives. Others were just ineffective.

Unable to find the right product, they created Force Factor. The natural elements boosted their energy, endurance, and power. The encapsulated formula provided the perfect balance for their lifestyles.

Factor 2 Nitric Oxide effectiveness

Ever since Force Factor hit the market in 2009, the founders have been on the hunt for an even more powerful nitric oxide booster. They knew just how well Force Factor worked for the tens of thousands of satisfied customers that had signed up for the free sample, but they refused to settle. They hired some of the country’s top researchers to look for the next breakthrough in sports nutrition.

In August 2011, they found it. In a “eureka” moment still ingrained in the minds of everyone involved, the team discovered an incredible new pathway for nitric oxide that is 2x more effective than arginine at raising the body’s levels of the key compounds necessary for stimulating nitric oxide production.

This revolutionary finding has shocked the fitness community. The formulators at Force Factor packed every last ounce possible of this game-changing ingredient into the all-new Factor 2, which helps deliver mind-blowing workouts with its cutting-edge, multi-targeted pathway to boosting nitric oxide. The result is amplified strength, an insane amount of power, virtually endless stamina, and explosive energy.


The Substrate Input Regeneration Complex combines with the Dynamic NOx Enzyme Catalysis System to increase the bioavailability of Factor 2’s key ingredient, L-citrulline, powerfully stimulating your body’s natural NO production as you conquer your toughest workouts.

Along with Factor 2’s powerful amino acids, vitamin C and calcium work in tandem to help increase the amount of nitric oxide synthase enzyme in your body, catalyzing the creation of NO for a continuous release.

The nitric oxide reaction naturally relaxes the smooth muscle cells around blood vessels, widening the inner walls of the arteries. This process enhances nutrient and oxygen delivery to the muscles, increasing strength and endurance while decreasing fatigue during your workouts, giving you ultimate results in the most efficient manner.

Factor 2 permeates the blood stream
Nitric Oxide relaxes the smooth muscle around your vessels
More nutrients and oxygen are delivered
to your muscles

We challenge you to try Factor 2 and
see for yourself what it feels like to have a competitive edge in fitness. If you don't like it, the sample is yours to keep.

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Real Factor 2 User

“From the beginning, I truly believed that Factor 2 would help deliver major improvements to my physique in a short time. After taking Factor 2 and getting into a training routine and the results speak for themselves. I picked up Factor 2 from GNC and got to work immediately. The two photos of me show the progress. The first is a photo of me before the transformation, and the second is of me taken today while using Factor 2. Currently I am over 40 years old active and in the best shape of my life.”


"I have noticed that even when doing light weight, my muscle fullness becomes larger. I can honestly say I have noticed my biceps being larger than they have ever been. I have also noticed more endurance while running - easier breathing."

- Mark Bittelari

"The combination of Factor 2 and my protein regime has been awesome. I've looked into the science behind nitric oxide supplements, and it's very real."

- Craig Jaynes

By Brad Attaway

from Boston, MA

Brad Attaway

Nitric Oxide (NO2) and L-citrulline, along with protein and creatine, are essential elements of any good exercise supplement program. Factor 2's advanced formula represents the pinnacle of NO2 science. I fell badly out of shape when I retired from a decade of elite athletic competition: I gained more than 40 pounds of fat even as my strength and energy decreased--not to mention my relationship satisfaction. I lost confidence, my girlfriend was unhappy... I needed to make a change. I spent weeks working in the gym and on my bike with little result.

Then my friend told me about Factor 2. I ordered their free sample and noticed a change in my workouts--small at first, but increasing quickly: I recovered faster between sets which let me put up more weight more times and increased my endurance, I recovered faster after long rides so I could function better in the rest of my life and get back on the bike sooner, I got immediate aesthetic and performance boosts as the blood pumped through my veins bringing oxygen and nutrients to fuel my muscles.

It was incredible. In 8 weeks I had dropped 24 pounds and totally resculpted my physique. My girlfriend was amazed and at the beach her friends took notice as well. Factor 2 made it possible. I continue to make gains and look forward to being in the best shape of my life!

BOTTOM LINE Yes, I would recommend this to a friend.

Read More Customer Reviews

By Phi Ong

from USA

Phi Ong

They say you don't know how good you have it, until it's gone. Nothing could be more true about my experience with Factor 2. After my initial month's supply ran out, I started to notice something the first time I couldn't take it anymore. First off, it was getting harder and harder to get a pump. While on Factor 2, as little as 2 sets got me a pump that felt amazing and helped me push myself harder. Off it however, I have pushed myself as hard as I can for sometimes a full workout and still haven't felt that amazing pump that I get with almost virtually no effort while on Factor 2. I started to reach plateaus, I started to get discouraged from the gym and a general weak disinterest.

Since then, I have gotten another supply and everything feels great. My second workout after being on Factor 2 again and I shattered my plateaus. I have upped my weights every workout without fail, something I was only unable to do outside of Factor 2. I have not had any plateaus either. You really take something for granted until it's gone. Comparing my workouts with and without Factor 2, I can't picture going to the gym without it. It's an amazing product and something no one should ever go without.

BOTTOM LINE Yes, I would recommend this to a friend.

By John Paul Miks

from Stoneham, MA

John Paul Miks

I was out of shape and wanted to get back to excersizing again and shedding unwanted pounds. I started running around a local pond that is 2 miles around once. I did a combination of running and walking because I couldn't run around the whole pond without walking and taking short breaks.

I found this ad online for Factor 2. So I decided that since it was a free 2 week trial, what have I got to loose? My first bottle arrived a week later and I took the first dose of Factor 2. I headed down to the pond and ran around the whole pond 2 times without stopping to walk or for a break to catch my breath.

I was in complete disbelief, and at that point I realized that Factor 2 was the real deal and not some phony gimmick. Also when strength training at the gym I noticed bigger pumps and more strength to get me at the desired weight lifting abilities. I then decided to become a member of Force Factor.

Since may of 2009 when I started using Force Factor I have lost 20 pounds and am in the best shape I have ever been in.

BOTTOM LINE Yes, I would recommend this to a friend.

By Carlos Serrano

from Boqueron, PR

Carlos Serrano

I'm 52 years old, have high blood pressure, type 2 diabetes, have had two hip replacements, 6'2 and over 300 lbs.

I tried the promotional Factor 2 for the first week, but my blood pressure went up. I canceled the offer to continue. But I noticed after I changed my blood pressure dosage and continued my Factor 2, my blood pressure went down, my blood sugar lowered big time, and all because I have more stamina, better concentration, but more importantly the desire to work out.

This product is helping me and will help you too!

BOTTOM LINE Yes, I would recommend this to a friend.

By Andrew Jackson

from USA

Andrew Jackson

I just wanted to promote this product for a minute because it is by far the best out there. Factor 2 helps me to break through the feeling of "I can't do anymore" into "okay maybe 5 more...not so bad I can do a couple more." I can feel the difference in my breathing. It feels as if I am taking in more O2 than usual.

I actually stack it with Jet Fuel but if you guys have a product comparable to it or better I would try it ASAN (As Soon As Now). FYI Jet Fuel keeps my mind focused and my workouts consistent. What can I say? I have a lazy brain when it comes to my physical health. If you guys have a product that will keep me focused, let me know.

I also use the pre work out thermo supplement you offer, it is great too. I've used Anadrox but it was a bit much in the jittery side effects. Your pre workout sup works just right.

I was wrong...this is not just another ad! It actually does work!

Thank you 10 times over!

BOTTOM LINE Yes, I would recommend this to a friend.

By Christopher Bledsoe

from Waco, NC

Christopher Bledsoe

I am considered the pickiest man in the world! I have been looking for a product that will actually work. I jumped at the idea of Factor 2 especially because it is a pill! We all know the protocol for mixing supplemental drinks! I called in sick today for work, I was really feeling bad. I mustered up the strength later on in the day after many hours of sleep to check the mail box and my Factor 2 was here!

I followed the instructions and took 2 tablets 30 min before lunch. I only took 2 tablets and I assure you! No exaggeration! My body in a matter of minutes starting feeling so energized from the inside out. To describe the feeling exactly, it was like someone had infused my body with oxygen. I felt strength from within my body that I have never felt before. It was also a refreshing feeling, my eyes even felt clearer and more acute I noticed that within 30 minutes the redness had left. (Usually I would use eye drops to clear the redness).

I have recovered from my cold in one day and I will be going to work tomorrow. I assure you that if this product didn't work I would be the first person to tell you. I have only taken 2 tablets and from my first experience I can't wait until morning to take my next two tablets.

BOTTOM LINE Yes, I would recommend this to a friend.

By Cristian Mendoza

from USA

Cristian Mendoza

Yo siempre trate muchos productos muy costosos pero nada funsionaba cuando descubri Factor 2 dije. Lo voy a tratar alfin es una muestra gratis no tengo nada que perder y lo ice. Solo puedo desir que si funsiona estoy muy satisfecho con el producto grasias Factor 2.




BOTTOM LINE Yes, I would recommend this to a friend.

By Christopher Davis

from USA

Christopher Davis

I have only been taking Factor 2 off and on for a few weeks, but I already see the difference. I ordered the 14 day trial, and the first time I took it I noticed I did more weight and I had more energy doing cardio. After I ran out of the trial, I was off of F.F. for a week, and MAN, I saw the difference! I'm back on it and I don't ever see getting off of it again!

Even when I'm not doing more weight, I find it a lot easier to recover in-between sets, and it's a lot harder to hit my "wall". Sometimes you can get so tired after a few sets that you want to stop and go home, but not with Factor 2. Even after finishing my workout I STILL feel like I could spend an extra hour working out and still have enough energy. It's also helped me have energy throughout the day. I have narcolepsy so when I don't get a lot of sleep the night before it would show up in my workouts and I'd struggle to complete my workouts. I'd do less weight, and would tire easily.

With Factor 2 even when I don't get as much sleep, I still have enough energy to complete my workouts. Overall, I'd recommend the product to anybody and everybody who's willing to try it!

BOTTOM LINE Yes, I would recommend this to a friend.

By Dr. Amy Hursh

from USA

Dr. Amy Hursh

I wanted to let you know that I have been using the Factor 2 products that you supplied me. Thank you for those once again. Allow me to give you guys some praise! This is my 5th competition in the past 4 years. Every time I have trained and dieted for a show, I have lost strength and lean mass. Since I started dieting in january of this year, I have managed to maintain my weight, increase my strength,and not feel tired during my workouts. In fact, since January, I have lost 7% body fat and gained lean body mass! I have never done that before! Taking the Factor 2 has given me strength, endurance, and the ability to hold onto muscle while managing to lose fat! I know it HAS to be the Factor 2 because I am doing nothing different this go round besides your products! I take it on my days off as well when working 12 hour shifts at my job and it gives me energy all day long.

I truly love this product and know it is the one thing that has given me an edge this time around!

BOTTOM LINE Yes, I would recommend this to a friend.

By Wayne Jackson

from USA

Wayne Jackson

Before I was taking Factor 2, I was taking the GNC brand with similar ingredients as well as creatine and "andro". I'm currently taking Factor 2's Nitric Oxide Booster and Force Factor's Ramp up. I'm 38 years old and I'm playing full contact football and working out hard at the gym. These supplements make me feel like I'm in my 20's again. They make me feel reborn with a second chance. A few years ago I was big and strong but I became out of shape and other supplements weren't helping. Now that I've been taking Factor 2 for two months, my coach and players look at me and say, "WOW You are built and diesel, you been working out??!"

My only Question: "Where was Factor 2 in 1992 when I needed it??

BOTTOM LINE Yes, I would recommend this to a friend.


"Arginine, also known as L-Arginine, is involved in a number of different functions in the body. They include: wound healing, helping the kidneys remove waste products from the body, [and] maintaining immune and hormone function. As a natural dietary supplement, arginine has garnered particular attention for its possible heart benefits."
- as reported on WebMD


“Factor 2 does not contain any harmful ingredients or stimulants. As a follow up to Force Factor, it is one of the best products on the market for building muscle quickly and safely. I highly recommend this product, as it does not stimulate your nervous system, which means that you won’t experience any withdrawal symptoms.”

Dr. Marko Baer
Nutrition Immunology,
Oxford, United Kingdom
GentSource, Inc.


Vernon Davis, the premier tight end in football, transforms his body in 3 simple steps.

SAFE.Start taking Factor 2 daily. Take 2-4 capsules during breakfast and 2-4 capsules dring lunch with plenty of water.

EASY.Factor 2 immediately increases your body’s natural production of Nitric Oxide (NO). This increase in NO levels will help improve your body’s power, strength, and endurance.

EFFECTIVE. Get the most out of your workouts and the results you’ve been craving with Factor 2. Stack it with Force Factor for ultimate muscle-building effects and explosive energy.

For a limited time, try Factor 2 now and get our 12-week workout log and performance cookbook for only $1.29 each. That's more than 90% off!

The 12-week workout log gives you premium access to nutrition tips, the Force Factor supplementation guide, pro athlete workout routines, and workout logs to track your progress in the gym. The cookbook contains 104 fuss-free recipes in 10 different categories with easy-to-follow directions.

Now that you've found the supplement of champions, it's time to start eating and training like one!

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