I’ve been using these caps before my workouts and I genuinely feel a bit more “pumped” during my sessions. The nitric oxide boost seems real—my muscles feel fuller and blood flow feels more intense. Research shows L‑Arginine helps convert to nitric oxide, which relaxes blood vessels and enhances circulation . That said, the gains aren’t mind-blowing . I also noticed that taking more than recommended can upset my stomach, which matches what sources warn—better to start low . Read more