This amino acid is converted into nitric oxide in your body, and numerous studies have demonstrated its effectiveness on male sexual performance and erection quality. In one study, 37% of men with erectile dysfunction reported a significant improvement in their ability to gain and maintain an erection after taking l-arginine daily for just over a month1. In a different study, another 31% of men with erectile problems experienced significant improvement in both their erections and sexual performance after taking l-arginine for six weeks, and their nitric oxide levels doubled too2!
Based on this impressive research, we’ve made L-arginine the main ingredient in GainerX™. With a massive 600mg of L-arginine per daily serving, you’ll experience reliable, solid erections that stay harder for longer!