Do you want rock-freaking-hard biceps and boners!?
How about shirt-ripping workout pumps that make the ladies squirm and fellas burn!?!
And what about massive, head-turning muscles that pulsate with veins so thick you could use them for surgical tubing!?!?!?!
Well, today’s your lucky day, Broseidon. A bunch of super-powerful scientists have descended from the heavens to deliver the secret to swole to us musclebound idiots.
It’s called nitric mothafuckinoxide and it’s so damn good at hacking your biology and force-feeding your muscles nutrients and hormones and shit that it was given a Nobel Prize!
…
That was basically copy and pasted from a sales page for a popular nitric oxide supplement.
Okay…I…touched it up a little. But not much.
Shenanigans aside, there’s no denying that nitric oxide supplements are extremely popular. Guys and gals spend tens of millions of dollars on them every year in hopes of building muscle and strength faster.
The first thing you need to know about these supplements is they don’t contain nitric oxide, which is a gas.
Instead, most contain as their primary ingredients one or more forms of the amino acid arginine (with arginine alpha-ketoglutarate being the most popular).
This amino acid is supposed to boost nitric oxide levels in the blood, which in turn is supposed to increase your muscle growth, strength, and performance.
What does the research say, though?
The (Apparent) Benefits of Nitric Oxide Supplements
Most nitric oxide supplements are sold first and foremost as potent muscle builders.
Increasing blood flow to the muscles also increases nutrient delivery, which has been shown to elevate protein synthesis rates. This is why arginine and nitric oxide supplements in general are often marketed like they’re natural steroids.
Another mechanism of arginine touted as a clincher is its ability to raise growth hormone production in response to exercise. This is music to the average consumer’s ears, who is indoctrinated to believe that more growth hormone of any kind and amount is going to help them build more muscle.
This all sounds pretty sexy, but look a bit closer and you start noticing flies in the soup.
Let’s tackle the growth hormone claims first because they’re 100% bogus.
Yes, supplements that increase nitric oxide levels like arginine and citrulline can increase growth hormone levels when you exercise, but no, this isn’t going to help you build more muscle.
The subjects lifted 5 times per week for 12 weeks and followed a standard dietary protocol (high-protein intake, post-workout nutrition, etc.).
The primary finding of the study was that the exercise-induced spikes in anabolic hormones like testosterone, growth hormone, and IGF-1, which all remained within physiological normal ranges, had no effect on overall muscle growth and strength gains.
That is, all subjects made gains in muscle, but the variations in the size of the hormone spikes among them had no bearing on the results.
The key takeaway here is not that you should take steroids, but that things you can do to naturally raise your anabolic hormone levels are unlikely to affect your muscle growth.
And in case you’re wondering why growth hormone has become so popular in the world of bodybuilding if it doesn’t help you build muscle, it seems to greatly enhance muscle growth when combined with regular (and dangerous) use of insulin and large doses of anabolic steroids.
So, with nitric oxide’s growth hormone mechanisms brought into line, let’s move on.
The big problem with arginine as a nitric oxide booster and ergogenic aid is its unreliability.That is, it works for some people but not others.
This explains why nitric oxide supplements are very hit-and-miss–some swear by the bigger pumps and better workouts and others notice absolutely nothing.
If you want to try citrulline for yourself, check out my 100% natural pre-workout supplement PULSE. It contains 8 grams of citrulline malate in every serving along with clinically effective dosages of 5 other ingredients proven to increase physical and mental performance.
The Bottom Line on Nitric Oxide Supplements
Research clearly shows that raising plasma nitric oxide levels can improve workout performance. Supplements that accomplish this are worthwhile additions to your regimen if you’re looking to maximize performance.
That said, the benefits of nitric oxide supplements are often oversold. They aren’t going to skyrocket strength or help you pack on mass like steroids.
A more realistic view is if a nitric oxide supplement can help you train harder over many workouts, and if you actually take advantage of this by pushing yourself in your training, you can make more progress than if you hadn’t taken it.
If you want to see what a nitric oxide supplement can do for you, go with citrulline instead of arginine. Take a clinically effective dosage of 6 to 8 grams per day and you should see improvements in your workouts within a week.
What’s your take on nitric oxide supplements? Have anything else to share? Let me know in the comments below!
Mike Matthews is the founder of Legion as well as the author of several award-winning fitness books, including Bigger Leaner Stronger, Muscle for Life, and The Shredded Chef.
His simple and science-based approach to building muscle, losing fat, and getting healthy has sold over a million books and helped thousands of people build their best bodies ever, and his work has been featured in many popular outlets including Esquire, Men’s Health, Elle, Women’s Health, Muscle & Strength, and more, as well as on FOX and ABC.
If you don’t like something of ours, guess what happens next?
No, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon. Nor do we ask you to fill a cursed inkwell with orc’s blood and demon saliva and then use it to complete reams of return forms written in ancient Cyrillic script.
We just . . . wait for it . . . give you your money back. Holy moo cows. And that means you can say "yes" now and decide later.
Free Worldwide Shipping & Returns
Many companies use shipping and handling fees to increase their profit margins, but here at Legion, we hate profits, so our shipping is free!
Okay, so we do dig on profits, but we also go in for happy customers, and free shipping works like gangbusters. So, if you live in the United States, your order ships free regardless of order size, if you live in the UK or Canada, your order ships free when it’s over $99, and if you live elsewhere, your order ships free when it’s over $199.
Also, if you don’t absolutely love our stuff for whatever reason, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon.
We just . . . wait for it . . . give you your money back. No returns. No forms. No nonsense. Holy moo cows.
That means you can say “yes” now and decide later. You really have nothing to lose.
Free Worldwide Shipping & Returns
Many companies use shipping and handling fees to increase their profit margins, but here at Legion, we hate profits, so our shipping is free!
Okay, so we do dig on profits, but we also go in for happy customers, and free shipping works like gangbusters. So, if you live in the UK or Canada, your order ships free when it’s over $99.
Why the restriction on international orders? Unfortunately, shipping abroad is very expensive, and if we didn’t require a minimum order size, we’d lose a lot of money. But! We're also hustling to improve our international logistics and will be passing our savings along to our international customers.
Also, if you don’t absolutely love our stuff for whatever reason, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon.
We just . . . wait for it . . . give you your money back. No returns. No forms. No nonsense. Holy moo cows.
That means you can say “yes” now and decide later. You really have nothing to lose.
Free Worldwide Shipping & Returns
Many companies use shipping and handling fees to increase their profit margins, but here at Legion, we hate profits, so our shipping is free!
Okay, so we do dig on profits, but we also go in for happy customers, and free shipping works like gangbusters. So, if you’re outside the USA, your order ships free when it’s over $199.
Why the restriction on international orders? Unfortunately, shipping abroad is very expensive, and if we didn’t require a minimum order size, we’d lose a lot of money. But! We're also hustling to improve our international logistics and will be passing our savings along to our international customers.
Also, if you don’t absolutely love our stuff for whatever reason, we don’t request you deliver it to a PO box in the Gobi Desert by carrier pigeon.
We just . . . wait for it . . . give you your money back. No returns. No forms. No nonsense. Holy moo cows.
That means you can say “yes” now and decide later. You really have nothing to lose.
Clinically Effective Ingredients & Doses
Many ingredients in supplements don’t have any scientifically validated benefits, and many ingredients that do are often underdosed to the point of irrelevance.
That’s why we only use the choice ingredients and precise doses shown to be effective in peer-reviewed scientific studies.
Clinically Effective Doses
You need more than great ingredients to make great products—you also need proper doses. That’s why we use the precise doses of ingredients shown to be effective in peer-reviewed scientific studies.
Natural Ingredients
“Natural” doesn’t always mean “better,” but in many cases, natural ingredients are superior to artificial ones for various reasons, including purity, safety, and efficacy.
That’s why all of our ingredients in all of our products come from plant and animal sources, including sweeteners, colors, and flavors.
Made in USA with Globally Sourced Ingredients
If you want to ensure the supplements you’re swallowing every day are safe and effective, you want products produced in the USA.
That’s why all of our supplements are made in America in NSF-certified and FDA-inspected facilities that operate in accordance with the Current Good Manufacturing Practice (cGMP) regulations.
Lab Tested
Did you know that supplements can contain dangerously high levels of toxins like lead, arsenic, and cadmium?
That’s why we test every ingredient of every supplement we produce for heavy metals, microbes, allergens, and other contaminants and ensure they meet the strict purity standards set by the FDA.
Naturally Sweetened & Flavored
While artificial sweeteners may not be as dangerous as some people claim, studies suggest that regular consumption of these chemicals may indeed be harmful to our health.
That’s why all of our supplements are naturally sweetened and flavored and contain no artificial food dyes, fillers, or other unnecessary junk.
Science-Backed Ingredients
Many ingredients in supplements don’t have any scientifically validated benefits. That’s why we only use choice ingredients shown to be effective in peer-reviewed scientific studies.
No Chemical Junk
“Natural” doesn’t always mean “better,” but in many cases, natural ingredients are superior to artificial ones for various reasons, including purity, safety, and efficacy.
That’s why all of our ingredients in all of our products come from plant and animal sources, including sweeteners, colors, and flavors.
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In consideration of the services and/or products offered by Legion Athletics, Inc. (“Legion”) including, but not limited to, nutrition plans, exercise routines and coaching, and in addition to the payment of any fee or charge:
I knowingly and voluntarily enter into this waiver and release of liability and hereby waive any and all rights, claims or causes of action of any kind whatsoever arising out of my use of Legion’s services and/or products, and I hereby release and hold harmless Legion and its consultants, officers, contractors, agents, owners and employees from any and all responsibility, liability, cost and expenses, including for injuries, damages or disorders (physical, metabolic, or otherwise), resulting from my use of Legion’s services and/or products.
I understand that fitness activities including, but not limited to, strength, flexibility, and cardiovascular exercise, with or without the use of equipment, are potentially hazardous activities that involve a risk of injury and even death, and I am voluntarily participating in these activities and using equipment and machinery with knowledge of the risks involved. I hereby agree to assume and accept any and all risks of injury or death related to said fitness activities.
I understand Legion’s services and products are not meant to treat or manage any health conditions or circumstances, and I acknowledge that Legion has recommended I obtain a healthcare provider’s approval for my use of Legion’s services and/or products, through regular physical examination(s) and/or consultation. I acknowledge that I have obtained my healthcare provider’s approval or have decided to use Legion’s services and/or products without such approval and hereby assume all responsibility for my use of said services and/or products.
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This is the content
Some popular pre-workouts are all-natural. Some contain the right mix of high-quality ingredients. Some provide clinically effective doses. But only Pulse checks each of these boxes.
Pulse doesn’t just “contain natural ingredients''—every ingredient is naturally sourced from plants and animals. Pulse contains no artificial or synthetic substances of any kind.
Every serving of Pulse contains 15.1 grams of active ingredients that have been shown to be safe and effective in peer-reviewed scientific research.
Every active ingredient in Pulse is backed by published scientific studies that show benefits in healthy humans.
Pulse contains no harsh stimulants that wind you up and burn you out. Instead, it contains a 1:1 ratio of caffeine and L-theanine, which produces a smooth energy rush and comfortable comedown.
We carefully examined 508 pages of scientific research to find out exactly what should and shouldn’t be in a pre-workout supplement.
Every bottle of Pulse is guaranteed to provide exactly what the label claims and nothing else—no heavy metals, microbes, allergens, or other contaminants.
While these types of chemicals may not be as dangerous as some people claim, studies suggest that regular consumption of them may indeed be harmful to our health. And that’s why we don’t put any of them into our products.
Before you buy a sports supplement, you should know that it's clean, safe, and transparent. And that's exactly what Labdoor's third-party testing and certification means.
It's hard to know for sure, but this probably makes Pulse the most-popular all-natural pre-workout supplement in the world.
If you don’t absolutely love this product, just let us know, and we’ll give you a full refund on the spot. No forms or return necessary.
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Analyzed for purity and potency in a state-of-the-art ISO 17025 accredited lab by Labdoor™, the gold standard of third-party lab testing.
Analyzed for purity and potency in a state-of-the-art ISO 17025 accredited lab, the gold standard of third-party lab testing.
This product doesn’t just “contain natural ingredients”—every ingredient is naturally sourced from plants and animals. This product contains no artificial or synthetic sweeteners or flavors of any kind.
Our scientific review board of nutritionists, dietitians, molecular biologists, doctors, and other accredited experts is responsible for reviewing every article, podcast, and video we produce to ensure they’re evidence based, accurate, trustworthy, and current.
Thanks to their connections, credentials, and academic experience, this team of MDs, PhDs, and other professionals has access to a wealth of research published in the largest and most prestigious journals in the world.
This allows them to not only review individual studies but also analyze the overall weight of the evidence on any and all topics related to diet, exercise, supplementation, and more.
If you feel that any of our content is inaccurate, misleading, out-of-date, or anything less than factual, please let us know in the comments section of the article in question.
Evidence Based
We follow a detailed, rigorous, multi-step process to create content that meets the highest standards of clarity, practicality, and scientific integrity.
First, our research associates provide our editorial team with accurate, up-to-date, proven scientific evidence.
Then, our editorial team uses this research to draft articles and outlines for podcasts and videos.
Finally, our scientific review board reviews the content to ensure all key information and claims are backed by high-quality scientific research and explained simply and precisely.
If you feel that any of our content is inaccurate, misleading, out-of-date, or anything less than factual, please let us know in the comments section of the article in question.