Agmatine: Everything You Need To Know


We’ve seen a lot of bodybuilding supplements fade away over the years for lack of scientific evidence, but one that seems to be sticking around is Agmatine.

It has developed a reputation in the bodybuilding world as a nitric oxide booster, so it’s used in A TON of pre workout supplements.

Unfortunately, most of the info out there on Agmatine is misleading or, in some cases, just completely wrong.

According to companies that sell Agmatine, it’s great for pumps and performance!  But the research, or lack thereof I should say, is a little less encouraging.

In this article, we’ll go over everything you need to know about Agmatine, including:

  • What It Is
  • Why People Use It
  • The Benefits
  • Clinical Dosage
  • Side Effects

And a whole lot more…

So if you’re read to finally get your facts straight about what Agmatine is and what it may or may not be capable of, let’s get started.

What Is Agmatine?

agmatine molecule chemical formula

Agmatine, also known as 4-(aminobutyl)guanidine, is a metabolite of the amino acid Arginine (which you’ve probably heard of).

In case you’re wondering, the term metabolite just means something that is created as a result of, or as a byproduct of, metabolism.

Agmatine is created when Arginine goes through a process known as decarboxylation, where the carboxylic acid group is removed from Arginine.

Bacteria convert naturally occurring Arginine into Agmatine so it’s found in fermented drinks like:

  • Beer
  • Wine
  • Coffee

But the amount of natural Agmatine present in these foods isn’t particularly high.

This is definitely one instance where supplementation is required.  You simply can’t get enough Agmatine from your food to really matter…

Unless of course you’re a raging alcoholic and caffeine-fiend, but then it’s safe to say the negatives outweigh the positives.

While many people think of Agmatine as a “pump supplement”, due mostly the the fact that it comes from Arginine, it’s actually most active in the brain where it functions as a neurotransmitter.

It’s partially stored in neurons (brain cells) and is capable of interacting with imidazoline, adrenergic, and NDMA receptors.

So Agmatine is more than just a workout supplement.

In fact, some of the more proven benefits have absolutely nothing to do with working out.

Why Do People Use Agmatine Supplements?

Agmatine is an extremely versatile compound with an ever-expanding list of potential benefits.  Mostly, people use it in the form of supplements to:

  • get better pumps during exercise
  • enhance exercise performance
  • improve brain function
  • reduce pain

Now, it’s important to understand that not all of these “benefits” are proven by science.

The popularity of Agmatine supplements may be on the rise, but research hasn’t caught up yet.

The truth is, many of the claims made by supplement companies about what Agmatine is capable of are tenuous at best.  With regards to how Agmatine may impact exercise specifically, there are literally no studies.

Not even in rodents…

What Are The Benefits Of Agmatine Supplementation?

There are numerous claims attached to Agmatine.  Most of these claims have been exaggerated by supplement companies that sell it, but some of them hold a little more weight from a scientific standpoint.

Let’s dive into some of the more common benefits attributed to Agmatine supplementation and see which ones are for real.

Agmatine For Better Pumps

Like Arginine, Agmatine is commonly purported to enhance blood flow, also known as “the pump”.

In vitro, it has been shown to increase Nitric Oxide in Endothelial cells.

It does this by activating the enzyme Endothelial Nitric Oxide Synthase (eNOS).  Contrary to popular belief, Agmatine does not convert into Nitric Oxide like Arginine.

They accomplish the same thing–increasing Nitric Oxide production–but in different ways.

Agmatine may increase Nitric Oxide production but there is no human evidence for this at all.

Right now, it’s just in vitro and rodent studies and, while they do appear promising, we still need to confirm the findings in actual humans.

What works in mice doesn’t always work in humans.  In fact, it often doesn’t.  We’ve seen tons of supplements get hyped beyond belief because some rodent research indicated it might be useful, only to find out they don’t really work in Humans.

L-Arginine is actually a prime example of that.  It should boost NO and enhance performance in theory, but it has repeatedly failed to do so in studies.

As it turns out, Citrulline–the precursor to Arginine–is actually much more effective.

So I wouldn’t be so quick to declare Agmatine a “nitric oxide booster”.  It’s far from proven.

The preliminary research on Agmatine suggests that it can boost Nitric Oxide which could potentially enhance “the pump” during workouts.  However, until we see some human studies, it’s best not to jump to conclusions.  For now, Agmatine MAY be effective.

Agmatine And Exercise Performance

Agmatine is often used in pre-workout supplements because it’s widely believed that it enhances exercise performance.

To be crystal clear…

Absolutely no studies have even attempted to measure the impact of Agmatine supplementation on strength, endurance, or any other measure of physical activity.

That said, it has a few mechanisms by which it could potentially improve exercise performance.

One way is simply by increasing Nitric Oxide levels, like we discussed in the pump section above.

Another way–this is definitely the more intriguing way–is by triggering the secretion of Beta-Endorphin.

Beta-Endorphin is a chemical released by the brain in response to certain stressors such as exercise.  It blunts pain perception and improves mood, both of which may be conducive to performing better in the gym.

Unfortunately, without any human studies, it’s tough to draw any solid conclusions about how Agmatine actually impacts physical performance.

It may work, but that still leaves the question of dosing.

Agmatine may enhance exercise performance, either by increasing N.O. levels or by Beta-Endorphin release.  However, there are absolutely no human studies so we can’t really draw any solid conclusions about how Agmatine really impacts exercise.

Agmatine And Pain

Agmatine has been shown to agonize the NDMA subclass of Glutamate receptors which are known to regulate pain perception.  Naturally, some of the research on Agmatine has been specifically geared towards pain management.

In mice, Agmatine has been shown to reduce inflammatory and neuronal pain.

It is thought to work by reducing plasticity, which this type of pain is reliant upon.  Agmatine has also been shown to interact with opiod receptors in such as manner that it actually enhances the pain reduction seen with Opiods while reducing tolerance at the same time.

One human study found that supplementation, at 2.67 grams per day, reduced pain associated with Radiculopathy.  It’s probably worth mentioning, however, that this study was funded and conducted by organizations that stood to benefit from positive results.

So far, it definitely looks like Agmatine plays at least some role in reducing pain, but more studies would be nice!

Agmatine appears to have some capacity for pain reduction, at least when it comes to inflammatory or neuronal pain.  It may not reduce ALL pain.

Agmatine And Addiction

Since Agmatine interacts with adrenergic receptors–specifically, alpha-2-adrenergic receptors–there has been some research in the area of addition.

Adrenergic receptors play a role in addiction.  By preventing up-regulation of these receptors, Agmatine may help combat addiction.

It has been shown to reduce symptoms of alcohol withdrawal in mice, but human studies are non-existent.

Studies have also looked at how it can impact Cocaine addiction, but only in mice.

These studies haven’t had particularly promising results, but there are also differences between mice and humans with regards to the addictive potential of Cocaine.

Unfortunately, there haven’t been any human studies.

Right now, it seems like Agmatine may be kind of useful for treating some forms of addiction, but there’s not a lot of evidence either way.

All the studies have taken place in rats, not humans.  While we may share a lot in common with rodents, addiction is a very human development.

Without studies in humans, it’s impossible to say how it impacts addiction.  All we have is a mechanism of action by which it may help with addiction.

The studies in mice with regards to addiction can’t really be extrapolated to humans because of major differences in the way our brains form addictions.  Without human studies, it’s tough to say how Agmatine impacts addiction or addictive behavior.

Agmatine And Cognitive Function

Another benefit commonly attributed to Agmatine is cognitive enhancement.

This stems from the fact that it acts as a neurotransmitter and impacts multiple kinds of receptors that can ultimately change the way we think and feel.

In the brain, Agmatine levels naturally increase when neurons are activated, indicating some sort of relationship between Agmatine and cognitive function in general.

In mice, it’s been shown to improve memory and learning capability as well as combat amnesia, so there’s plenty of reason to suspect that it may enhance cognitive function in humans…

Unfortunately, there’s absolutely no human evidence to support this notion.  All we have is a bunch of rodent research which indicates Agmatine may be effective.

That’s not proof though.  It’s just cause for more research…human research, preferably.

A lot of supplements have been shown to improve cognitive function in mice, but most of them don’t work in people.  For now, we have no idea how Agmatine supplementation impacts cognitive function.

Agmatine And Depression

Since Agmatine interacts with various neurotransmitter systems in the brain, it has been looked at as a potential treatment for depression as well.

In mice, Agmatine is capable of exerting anti-depressant effects that rival those of some commonly prescribed anti-depressant medications like imipramine.

Unfortunately there hasn’t been much research in humans, but one study found that subjects supplementing with Agmatine reported feeling less depressed.

It might make sense to use Agmatine in conjunction with other anti-depressants, but that’s obviously something you should consult your doctor about before doing.

It’s too early to label Agmatine as an effective treatment for depression just yet, but it definitely looks promising.

Agmatine And Stress/Anxiety

Agmatine is also believed to play a role in stress and anxiety.

Resarch indicates that Agmatine levels become elevated in times of stress, perhaps indicating that it has a protective effect in stress situations.

The anxiety-reducing effects of Alcohol may, in part, be the result of increased Agmatine levels in the brain.

Studies in mice indicate that Agmatine reduces anxiety, but it remains under-studied in humans for this purpose.

Agmatine definitely appears to have some anti-anxiety properties, but the lack of human studies makes it difficult to determine how effective it is or what dose would be required.

What Kind Of Results Can You Expect With Agmatine Supplementation?

Honestly, it’s hard to say.

The most compelling evidence for Agmatine indicates that it may be useful for enhancing Nitric Oxide production and may dull your pain perception to some extent.

Both of these effects would be beneficial for performance and, yes…THE PUMP!

It’s certainly possible that Agmatine will make you perform better during your workouts.  It’s just not proven.

For that reason, it’s probably better to just say “try it yourself and see”, rather than speculate about how it may help you.

Are There Any Side Effects With Agmatine?

There’s no reason to suspect that Agmatine isn’t safe.  The LD50 is extremely high, at 980mg/kg in mice.

The LD50 is simply the amount of a given substance it takes to kill half a test population of animals (usually mice).  It’s used as a basic benchmark to gauge the toxicity of various substances.

Although human studies are lacking all around, there was one in which subjects took a little over 3.5 grams per day and there were no adverse effects reported.

Ultimately,  Agmatine appears to be safe at standard supplemental doses of 1-3g daily.  Since it does interact with certain receptors in the brain, it could potentially clash with certain medications.  That’s worth noting if you’re on psychoactive medication of any kind.

If that’s the case, talk to your doctor about it.

Choosing The Best Agmatine Supplement

Although Agmatine is present in small amounts in some foods and beverages (particularly alcoholic beverages like beer and wine), you need to supplement with it to get enough to make a difference.

Surely the cons outweigh the pros when it comes to getting your Agmatine through alcohol!

You’ll typically find Agmatine in supplements labeled Agmatine Sulfate.

There are no other commonly used forms of Agmatine, though technically there are an unlimited number of possible chemical combinations.

When it comes to picking the right Agmatine supplement, it’s not so much a matter of what form.  It’s more about who you’re buying it from.

Not all supplement companies are trustworthy and Agmatine is kind of an expensive ingredient to begin with.  It’s definitely best to go with a brand you actually trust, rather than roll the dice on whatever’s cheapest.

Why Citrulline Is Better A Better Workout Supplement Than Agmatine

L-Citrulline is a precursor to the amino acid Arginine which, unlike Agmatine, has actually been proven to:

In other words, if you’re using Agmatine for the purposes of enhancing your workouts, you should really be using Citrilline.

It does everything that Agmatine is supposed to do (when it comes to boosting nitric oxide and improving workouts).

Why roll the dice on a supplement that might work when you could choose one that has been proven to work again and again.

You’ll find Citrulline as:

  • L-Citrulline
  • L-Citrulline Malate

Both are considered effective, assuming you dose them right.

L-Citrulline should be dosed at 3-4 grams prior to exericse.

L-Citrulline Malate should be dosed at 6-8 grams prior to exercise.

If you’re looking for a supplement that provides a clinical dose of Citrulline Malate, check out my own intra-workout creation, Amino Beyond.

Momentum Nutrition Amino Beyond


Amino Beyond is nothing short of an intra-workout powerhouse which provides everything you need to perform better, recovery faster, and support muscle growth.

Each serving contains clinical doses of:

Citrulline Malate (6grams/serving) – enhances muscular endurance, boosts nitric oxide levels, and speeds up recovery.

Leucine (4 grams/serving)directly stimulates muscle protein synthesis and supports muscle growth.

L-Carnitine L-Tartrate (2 grams/serving)enhances exercise recovery by reducing oxidative damage to muscle tissue.

Taurine (1 gram/serving)enhances exercise recovery.  May be synergistic with BCAAs in this regard.

Zinc (15mg/serving) – promotes a favorable hormonal environment and supports immune function.

Plus, Amino Beyond contains zero calories, no artificial dyes, and no unnecessary fillers.

If you’re looking for an intra-workout supplement that will give you some incredible pumps, enhance muscular endurance, promote muscle growth, and speed up recovery, you may want to consider Amino Beyond.

I’m not hating on Agmatine…

By all means, try it.  I just think you should start with what has been proven to work before experimenting with supplements that have not been proven to work.

The Bottom Line On Agmatine

bodybuilder with arms at his waste, thinking

The use of Agmatine is definitely on the rise and while there is a lot of preliminary research that’s seems promising, this is one situation where science just hasn’t yet caught up with the hype.

It may be effective, but the exercise-related claims made about Agmatine are based on pure speculation.

As a treatment for pain, depression, and addiction, however, it may actually be quite useful.

If you want to give Agmatine a shot, go for it!

There’s certainly nothing wrong with the try it yourself approach, but when it comes to supplements, it’s important that we draw a distinction between the proven benefits and the potential benefits.

With Agmatine, supplement companies love to frame the potential benefits as proven benefits.

At least now you know the difference!

Have anything to share about Agmatine?  Comment below…

I’m Matt Theis, founder of SuppWithThat, Momentum Nutrition, and Singular Sport. I created SWT to separate the science from the hype and publish accurate, research-based information on supplements. If you like what I have to say here, feel free to check out my supplements at and

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