ERECTIONS ∙ 3 minutes read

The Correct Dosage of L-Arginine for ED

By Ashton Sheriff

If you have researched natural remedies for erectile dysfunction, you may have come across L-arginine and its rumoured ability to treat erectile dysfunction (ED). 

But what exactly is the correct dosage of L-arginine for ED? In this article we will try and shed some light on the science behind L-arginine and determine how much should be taken to treat ED - if any at all! 

What is L-Arginine?

L-Arginine is an amino acid that is produced naturally in the body. It is also found in high-protein foods such as fish, poultry, and soya. To find out more about L-Arginine, check out our “Complete Guide to L-Arginine”. 

Taking L-Arginine 

L-arginine typically comes in the form of tablets, capsules, and powders. In tablet and capsule form, doses of L-arginine tend to range between 500mg to 1000mg, whereas in powder form doses range between 1g to 3g.

Does L-Arginine work for ED?

There is little scientific evidence to suggest there is a correct dosage of L-arginine for ED - as only a handful of small trials have documented the effects of L-arginine on erectile function, and these have shown fairly modest effects. As a consequence of this lack of evidence, there is no standardised recommended dosage of L-arginine for ED. 

One small trial showed that 31% of men experienced improved sexual function after being given 5g of L-arginine daily for 6 weeks. However, another study found that only 17% of men reported improvement in their erections after being treated with three 500mg daily doses of L-arginine for 34 days. 

Thus, it is difficult to determine the correct dosage of L-arginine for ED because the evidence supporting its effectiveness is not of a high standard. 

With this in mind, it is best to consult your doctor before taking L-arginine to ensure it is safe and does not interact with any medication you may be taking. 

Side-effects of L-Arginine

Although L-arginine is considered to be “generally safe”, its side-effects can include:  

  • Nausea
  • Diarrhea
  • Abdominal pain
  • Bloating
  • Gout
  • Allergic response
  • Airway inflammation or worsening of asthma symptoms
  • Increased risk of death if taken after a heart attack 
  • Re-triggering of herpes virus (if you have had cold sores or genitial herpes) 

L-arginine may also adversely interact with some types of medication, such as: 

  • Nitroglycerin 
  • High blood pressure medication 
  • Erectile dysfunction medication 
  • Anticoagulants and anti-platelet drugs 
  • Diabetes drugs 
  • Isoproterenol 
  • Nitrates 
  • Diuretics

Once again, talk to your doctor before taking L-arginine to make sure it is safe for you and does not interact with any medication you are currently taking. 

The bottom line

Currently, there is no standardised correct dosage of L-arginine for ED. As the evidence supporting its efficacy as a treatment for ED is very limited, it is difficult - if not impossible - to confidently suggest the “right” dosage of L-arginine for erectile dysfunction. 

If you are looking for an effective treatment for ED, you might want to have a look at sildenafil. Its ability to treat ED is well-documented and unlike L-arginine, the dosage of sildenafil needed to treat ED is scientifically accepted

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