Does L-Arginine Increase Penis Size? The Facts Explained!

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Does L-Arginine Increase Penis Size?

Article Overview

L-Arginine can be found in a number of penis pills that I’ve tested and reviewed however, can this amino acid actually increase the size of your penis and are there any drawbacks or side effects you need to be aware of?

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Last updated Last updated 13 September, 2022

L-Arginine Summary

L-Arginine is an amino acid found in most animal products, like lean meat, fish, and beef. This compound is also reproduced in the lab and is a popular supplement today in the male sexual health industry.

While L-Arginine has been found to affect erections positively, there’s no scientific evidence to support the fact that this supplement increases penis size. In fact, no miracle pill will increase the size of your penis.

In this article, we’ll take a closer look at L-Arginine, its effects, and other applications of this compound.

Letter T IconThe Real Use of L-Arginine

The male sexual health industry is infamous for playing on the insecurities of men. The industry is known for parading ‘miracle pills’ that will magically enhance the size of your penis overnight, creating a fantasy sex life most men desire.

While the industry has made progress in ensuring long-lasting erections and enhanced sexual activity, there’s no one-stop solution to an increase in penis size. You won’t find a pill to enlarge your penis beyond its maximum dimensions.

In fact, without a surgical implant, it’s impossible to create any lasting change in the size of one’s penis.

L-Arginine has proven benefitsexternal link icon in wound healing, kidney health, boosting the immune system, and dilating arteries.

Like the other miracle cures out there, L-Arginine is a supplement sold by the sexual health industry, readily available in the market.

In nature, L-Arginine is an amino acid that can be converted into proteins. However, as a supplement, Arginine quickly converts to nitric oxide, a gas that can help improve erectile function.

Nitric oxide helps the blood vessels relax and widen, allowing blood to circulate more freely throughout the body. As such, this compound also dilates vessels in the penis, allowing blood to enter more easily during sexual activity, improving erectile function.

Letter C IconCan L-Arginine Effectively Enlarge Your Penis?

As mentioned, L-Arginine improves blood flow to the genital area allowing your penis to become engorged with blood quickly. This function of Arginine also helps supply the penis with much-needed oxygen, improving sexual activity and enabling you to maintain longer, harder erections.

L-Arginine cannot be used as a treatment for penis enlargement and is primarily used to improve erections. And while Arginine is known to treat ED, it isn’t a practical solution by itself.

In fact, men who take Arginine in combination with other sexual health supplements have reported having better erections.

L-Arginine and Yohimbine

A studyexternal link icon showed that, when combined with the supplement yohimbine, L-Arginine increases erectile response significantly. However, while the study took a fairly significant sample, this healthy response was recorded primarily in males with light to moderate ED.

L-Arginine and Pycnogenol

A study conducted by the Journal of Sex and Marital Therapyexternal link icon found that men supplied with a combination of L-Arginine and Pycnogenol showed a significant improvement in erectile function.

This study took place over three months and was designed to confirm that the combination of drugs and not Arginine alone led to better erections. In the first month, around forty participants only received Arginine, and a small percentage of them reported normal erections by the end of the first month.

In the second month, participants were given a combination of the two supplements, and those experiencing normal erections skyrocketed to a whopping 80%. This number went up even further when they continued the treatment in the third month.

Letter S IconSide Effects of L-Arginine

We’ve established that L-Arginine doesn’t increase penis length or girth and that in moderate quantities, it can help improve erectile function in most men.

However, you must take Arginine with extreme caution and in the presence of a health professional, since it may have specific side effects.


Arginine converts to nitric oxide, which dilates the blood vessels, allowing blood to flow unhindered throughout the body. As such, Arginine also acts as an anticoagulant, considerably slowing the effects of blood clotting.

This dilation of blood vessels means that those taking Arginine supplements are at risk of increased bleeding from an open wound. So if you’re taking Arginine regularly, you need to be extra cautious about getting cut.

Increased Potassium Levels

Regular intake of Arginine can steadily increase potassium levels in the body, which can be potentially dangerous and harm your body in the long run. Too much potassium in the blood can severely damage the heart and even lead to heart attacks.

Fluctuations in Blood Sugar Levels

L-Arginine is known to effectively utilize sugar in the body, helping to improve the burning of glucose by up to 40%external link icon.

While this effect on blood glucose levels can seem helpful to some, unchecked administration of Arginine can lead to severe fluctuations in blood sugar levels, which can impair the body’s normal functioning.

That’s why Arginine isn’t recommended for people with diabetes as the supplement will interfere with the function of their regular medication.

Reduced Blood Pressure

The nitric oxide in Arginine dilates blood vessels, improving blood flow throughout the body and reducing blood pressure. This effect on blood pressure can be negligible to some people based on their biological makeup.

However, for those taking blood pressure medication, it’s best to stay off L-Arginine as this supplement can interfere with the natural course of your current prescription.

Other known side effects of L-Arginine include:

  • Bloating.
  • Nausea.
  • Headache.
  • Abdominal pain.
  • Allergic reactions (especially in people with asthma).

Letter H IconHow Can You Increase Penis Size?

Let’s say this at the outset – there’s no natural way or miracle pill to increase the maximum length and girth of your penis.

That being said, it’s still possible to ensure longer, harder erections that will engorge your member, allowing it to reach its maximum size regularly.

Most men want bigger penises but aren’t aware that their natural size is large enough if only they could achieve this size every time they get an erection.

And while enlarging a penis beyond its natural dimensions is impossible, penile shrinkageexternal link icon is a real phenomenon and occurs to men worldwide. Luckily, it’s possible to reverse the shrinking in penis size.

Here are a few ways to ensure you achieve your maximum size regularly, so your member is big enough when it’s time to get busy.

Controlled Diet

What you put into your body plays a significant role in your sexual health, and you want to ensure your body receives the proper raw material.

Diets rich in saturated fats and cholesterol affect the size of your penis over time. Red meat, eggs, and dairy products may seem high in protein, but they’re also rich in unhealthy fats, which clog arteries and reduce blood flow to the penis.

And if a penis receives reduced blood flow over time, the tissues will shrink, leading to a reduction in penis size. By providing a steady supply of blood to the area, you ensure that your penis receives ample oxygen to function normally.

A diet rich in nuts, seeds, legumes, and other plant-based foods will give you the micronutrients necessary for optimal functioning. A plant-based diet improves erectile functionexternal link icon by clearing out arterial blocks in the body and enhancing blood flow to your nether regions.

With a steady supply of blood, your penis will stay healthy and functional, giving you harder erections and making your member appear a lot larger than you can imagine.

Regular Use

Your penis, like any other muscle in the body, requires regular exercise to function optimally. Frequent erections will ensure that your penis is receiving a significant quantity of blood which nourishes the collagen, elastin, and other tissue in the area.

To guarantee stronger erections, you must engage in sexual activity, either through masturbation or with a partner.

The penis is meant to be engorged with blood since that’s its essential function, and continually ensuring it stays healthy is the key to a larger penis.

It’s important to mention again that your penis won’t increase in size, but repeated erections will allow it to reach its maximum length and girth regularly. And repeatedly getting to your optimal size will make your member appear more significant than otherwise.

Note on Masturbation: It’s best to masturbate without pornography, as increased usage of porn has often been linked with erectile dysfunctionexternal link icon.

Exercise Regimen

While regular exercise doesn’t directly contribute to a larger penis, the side benefits of exercise can help improve your erections, making your member appear larger over time.

Regularly working out can help you burn fat and shed weight, improving blood circulation throughout the body. Increased fat in the body is directly related to smaller penis size.

This relationship between fat and penis size is primarily because a protruding belly can hide a significant portion of the base of your penis, causing your member to appear smaller than usual.

Burning this fat off your body can make your penis appear while giving you harder, better erections. It’s best to ensure you include both cardio and strength training into your workout regime.

While cardio can help you quickly burn fat, strength training is essential to stay trimexternal link icon and keep the fat off your body.

Exercise, especially strength training, is also known to boost testosterone levels in the body. While most men fall within the spectrum of normal testosterone levels, some tend to be lower in the range due to lifestyle habits and age-related factors.

Low testosterone levels have been directly correlated with penis shrinkageexternal link icon, and the best way to ensure your member stays fit and healthy is by keeping your testosterone levels up. Aside from supplements, exercise is a surefire way to maintain higher testosterone levels in the body.

Collagen Supplements

As we age, the collagen in our body reduces over time. Collagen is our primary building material and is used by the body to regenerate and build new cells. A loss of collagen over time leads to a subsequent drop in penis size as there’s less raw material to work with.

Collagen also helps repair the tissue in the penis, keeping it healthy and in a state where it can make optimal use of the blood flowing in. You can give your body the much-needed raw material to keep your member in good shape by taking collagen supplements.

Lifestyle Changes

Regular exercise, a healthy diet, and plenty of sex or masturbation will help improve blood flow to your penis, giving you the kind of erections you want. And stronger erections are the most effective way to enlarge your penis and allow it to reach its maximum length and girth.

But to sustain any lasting change, you may need to make other changes to your lifestyle.

Most smokers have erectile dysfunction to a certain degree. When you smoke, the blood vessels in your genital area and your penis get damaged, making it harder for blood to flow freely into the phallus.

As such, regular smoking can make it challenging to get and maintain erections. And even if you’re able to get one, the erection isn’t usually as strong as you’d like it to be.

We know that enlarging one’s penis isn’t realistic (at least not without physical intervention), but it’s possible to ensure your penis achieves its maximum length and girth. And this optimal state is only possible if we stay healthy and incorporate specific changes to our lifestyle.

Another obstacle to better erections is the regular consumption of alcohol. While a drink or two before sexual activity can help you loosen up or feel relaxed, drinking too much alcohol can impede sexual activity by making it harder to maintain an erection.

Alcohol interferes with the messengers in your brain telling your penis to fill with blood, making it complicated to get an erection. Plus, in the long run, alcohol consumption can reduce the production of testosterone, leading to poorer erections.

Drug usage has also been shown to have a harmful effect on penis health. Recreational drugs like MDMA and cocaine act as vasoconstrictors that reduce blood supply to the genital area.

Over time these drugs can damage the blood vessels in your penis, reducing its overall size and functionality in the long run.

Sex Toys

While sex toys can’t permanently increase the size of your penis, they can help improve blood flow, giving you enhanced erections. And as discussed, better erections will, over time, give your penis a more prominent appearance.

Penis Pumps

A penis pump is often used by older males engaging in sexual activity. However, it’s an effective way to ensure improved erections and anyone looking to improve penile function can use them.

A penis pump works by creating a vacuum that draws blood into the penis, causing it to swell, making it appear longer and harder. If you’re considering the purchase of a penis pump, my list of best penis pumps is a must read, whilst you should definately have a look through my article on the dangers of penis pumps to avoid any pain, discomfort or long term damage to your penis.


Using a penis stretcher is perhaps one of the few known way to safely increase your member’s size over time. A studyexternal link icon published by the Journal of Sexual Medicine proved that men who used penis extenders over three months noticed an increase in both flaccid and erect length.

This device is usually attached at one end of the phallus and pulled on both ends to create micro-tears along the penis.

This process is similar to how we build muscle during strength training. Workouts emphasize pushing the muscles to a point where it’s stressed out. This stress creates micro-tears that the body quickly repairs.

During repair, the muscles are built back stronger to withstand the additional stress.

When subjected to a penile stretcher, your penis undergoes the same process, allowing it to grow back thicker and stronger than before. However, there’s a catch – the men in the experiment had to perform stretcher exercises for three months to notice even a tiny change.

Letter F IconFrequently Asked Questions

Can I Increase My Penis Size by Taking L-Arginine?

L-Arginine doesn’t increase the size of your penis. The supplement releases nitric oxide into the body, dilating blood vessels and improving blood flow to the genital area. As such, L-Arginine helps to strengthen erections, giving you the appearance of a larger penis.

Is L-Arginine Safe for Consumption?

L-Arginine has specific side effects, some of which include:

  • Increased bleeding.
  • Soaring potassium levels.
  • Fluctuations in blood sugar.
  • Reduced blood pressure.

If you’re planning to take this supplement, do so only after consultation with a medical professional. It’s best to let your doctor know about any other medication you’re taking, as Arginine can be harmful when combined with certain over-the-counter medications.

Is L-Arginine Safe To Take With Viagra?

Viagra is known to cause a reduction in blood pressure which may be exacerbated with the consumption of Arginine. A combination of both these drugs can cause a significant drop in blood pressure, and it’s not advisable unless you’ve consulted a physician first.

Letter F IconFinal Thoughts

There are a few misconceptions in the male sexual health industry regarding the effects of L-Arginine.

While this medication can help improve your erections by stimulating blood flow to the genitals, there’s no evidence indicating that Arginine leads to an increase in penis size.

Aside from surgery, penis pumps and extenders combined with L-Arginine are your best option however as I found in my Priapus Shot interview with Dr John Leonardo, treatments such as the P-Shot can have the potential of increasing the size of the penis (albiet as a secondary benefit). 

As ever, if you’re planning on enlarging your member, it’s best to consult a professional and determine whether it’s necessary in the first place.

This Content Was Written By...

Author & Site Owner | Website
Chris is the owner and creator of Penis Enlargement Resource. He has years of knowledge in the male enhancement niche and has tested and assessed numerous products over the years.

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Chris Sabian Author & Site Owner

Avatar of Chris Sabian

So I’m Chris Sabian, the creator and owner of the Penis Enlargement Resource website.

Now I’m going to be honest, I’m actually really happy with the size of my penis – i’ve never had any complaints, and it works exactly how it’s meant to.

That said however, I have worked for various companies and businesses within the men’s sexual health niche – it’s from these years of experience actually working on a number of different products that i have an absolute wealth of knowledge on what does and doesn’t work.

Yes natural penis enlargement IS possible but the amount of bullshit out there is phenomenal.

In some cases, even doctors don’t know what is truly possible, with many (especially in the US) simply prescribing treatment options that are the most profitable for their clinics!

The number of times I’ve seen adverts online for this miracle cure for erectile dysfunction, or a product claiming to give you 3 more inches in less than a month really does play in to the unrealistic and misguided view point of so many and that is why i created Penis Enlargement Resource – to stop the scare mongering and provide a completely unbiased view point on every product that passes my desk.

Yes! Every product i review i actually have possession of – i’m not simply writing reviews based on other generic online content, so if your reading a review and can’t see any unique photos or videos, chances are it’s just an affiliate marketer trying to make a quick buck off your insecurities.

So take a step back, read the articles I’ve written and see which products I’d REALLY recommend, so you can take that first step towards making your penis bigger, stronger or harder.

The journey to natural penis enlargement is not a fast process, it is not an easy process… but if you stick with it, i absolutely promise you, it IS possible.


This Content Was Written By...

Author & Site Owner | Website
Chris is the owner and creator of Penis Enlargement Resource. He has years of knowledge in the male enhancement niche and has tested and assessed numerous products over the years.

Content By This Author...

Questions & Comments

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4 Replies to “Does L-Arginine Increase Penis Size? The Facts Explained!”

  1. It is possible to to increase the size of the penis by 1 inch? I’m 22 years old.

  2. Does your product work on a 75 year man?

    • We don’t sell any products directly however we do recommend a number of supplements and other products suitable for improving men’s sexual health.

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