L-Citrulline

Citrulline is a non-essential amino acid that has research supporting its use for exercise performance and recovery, improved blood flow, and improved immunity.*

How Does Citrulline Work for Erection?

Citrulline works by increasing nitric oxide levels, which is the chemical that facilitates erections. Viagra also works by increasing nitric oxide levels. Since citrulline is a natural amino acid it is a safe alternative to Viagra.

Initially, researchers were optimistic that the essential amino acid arginine could be used to treat erectile dysfunction, but recent research has shown that citrulline is more effective at increasing nitric oxide levels than arginine.

There is also evidence that citrulline may be effective at healing blood vessels within the penis to enhance erections. Citrulline has been shown to increase vascular endothelial growth factor (VGEF) within the blood vessels of the penis.

These two effects can combine to have a powerful effect on sexual function for men.

Indeed, researchers conducted a study on citrulline and found that it improved erection hardness and sexual frequency in men with mild erectile dysfunction (ED).