How Much Blood Does it Take to Get Hard?

How Much Blood Does it Take to Get Hard?

You may think that an erection is a pretty simple thing. In truth, it's a complex process that requires coordination between your neurotransmitters,

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You may think that an erection is a pretty simple thing. In truth, it’s a complex process that requires coordination between your neurotransmitters, nerves, penile smooth muscles, penile blood vessels, and your hormones.

For one, you’ll need approximately 130 milliliters of blood to fill the spaces in between the sponge-like tissues in the erectile regions of your penis. When there’s not enough blood in there, your penis won’t become sufficiently hard or erect. Find out how you can easily achieve erections naturally.

The Erection Mechanism

Whenever you’re sexually stimulated, whether it’s through visual, tactile, or even auditory stimuli, the sensations have to be communicated between your penis and your brain primarily through your penile nerves and spinal cord.

In the penis, a neurotransmitter called nitric oxide gets to work to stimulate the increased production of cyclic guanosine monophosphate which is more commonly known as cGMP. The more your penis produces and secretes cGMP, the higher your chances of successfully initiating an erection.

That’s because cGMP makes the smooth muscles in your corpora cavernosa relax, which then results in the relaxation of the smooth muscles in your penile arteries. This then leads to the dilation of those blood vessels, causing blood to flow into the sponge-like erectile tissues.

erect penis diagram

As those spongy tissues get filled with blood, your penis then starts to grow big. Then the pressure inside your corpora cavernosa increases and your penile veins get clamped tightly so that blood won’t leak out. This then causes your blood-filled penis to stand erect.

If something goes wrong in any of these steps, you will most likely experience an embarrassing erection failure. In short, you’ll need high concentrations of nitric oxide, high levels of cGMP, and enough blood to make your penis grow hard. Plus, you’ll also need testosterone because that’s the hormone that coordinates sexual arousal and penile tumescence.

Healthful Herbs That Promote Erections

Whether you just want to feel what it’s like to have a gigantic erection or you really need help getting a hard-on because you already have erectile dysfunction, there are several herbs that are not only effective erection boosters but also full of health benefits.

Horny Goat Weed

Horny Goat Weed is an excellent herb that’s known for its positive effects on men’s sexual health. This popularly used sexual enhancer is actually full of antioxidants such as icariin.

Icariin has a number of health benefits but it’s most known for its ability to inhibit the activities of PDE5 enzymes. PDE5 functions as an enzyme that breaks down cGMP. In short, the higher the concentration of PDE5 in your penis, the more likely you’ll have an erection failure.

Inhibitors of PDE5 like icariin and sildenafil help you to achieve erections precisely by stopping PDE5 from degrading cGMP. Aside from its PDE5 inhibitory effects, icariin is also known to have cardioprotective and anti-cancer properties. It’s been shown to help prevent atherosclerosis, and research indicates that it may also be good for neuronal growth.

Other benefits of Horny Goat Weed include increased sperm count and concentration, higher testosterone levels, reduced fatigue, and improved libido. If you take a sex enhancement pill that contains Horny Goat Weed, you get to enjoy all these health benefits, plus, you also get to achieve bigger erections.

Tongkat Ali

If you’re planning to use a sex enhancement supplement, it’s best to look for one that contains both Horny Goat Weed and Tongkat Ali. When these two are combined, you’ll surely experience a great boost in your erection.

Whereas Horny Goat Weed helps initiate an erection, Tongkat Ali helps you prolong that erection. That’s because Tongkat Ali works on the calcium and angiotensin II pathways in your penis. What this means is that Tongkat Ali basically prevents your penile smooth muscles from contracting.

As you know, the smooth muscles in your corpora cavernosa need to stay relaxed for penile blood inflow to happen. Angiotensin II, however, makes those smooth muscles contract, which would then cause the blood to flow out of your corpora cavernosa and into your penile veins, going back into circulation. This would make you flaccid instantaneously.

Tongkat Ali helps prevent that from happening by blocking the actions of angiotensin II. Plus, this healthful herb also helps increase the pressure inside your corpora cavernosa so that your penis stands fully erect.

On top of that, Tongkat Ali is a known testosterone booster, and it’s also great for increasing your sperm production, as well as for improving the morphology and motility of your sperm. Plus, you get to experience increased sexual stamina, thanks to the energy-boosting effects of Tongkat Ali.

Tribulus Terrestris

tribulus terrestris flower and fruit

When it comes to erectile dysfunction, Tribulus terrestris is among the most effective natural remedies. And it’s also one of the most well-studied herbs in relation to men’s sexual health and fertility. This means that there’s a lot of scientific evidence validating how effective this incredible herb is in improving sexual function and reproductive health.

Aside from greatly improving your erection quality, Tribulus terrestris is also known to be effective in raising testosterone levels, improving sperm motility, as well as increasing sperm concentration and semen volume. On top of that, Tribulus terrestris also helps improve your penile nitric oxide production, which further improves your erections.


When you need to increase penile blood flow, you definitely need L-arginine. Although it’s not an herb-based remedy, L-arginine is an amino acid that’s also popularly used in many sex enhancement supplements.

That’s because L-arginine is so effective in increasing penile nitric oxide production. And when you have high levels of nitric oxide, you’ll be able to easily increase your cGMP levels.

Plus, nitric oxide also serves as a vasodilator, which means that it can cause your penile arteries to dilate more so that an increased amount of blood can flow into your phallus. Hence, if you want a huge erection, you need to take a sex enhancement pill that contains L-arginine, Horny Goat Weed, Tongkat Ali, and Tribulus terrestris for best results.

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