unless injecting it which is the positive studies, i stand by my opinion.L-Arginine absolutely works, there are literally, 1000's upon 1000's of clinical studies and systematic reviews on the compound. It is the superior OTC compound for dilating blood vessels, increasing muscle cell endurance, aiding in erectile dysfunction, increasing nitric oxide levels, nutrient delivery and a host of other benefits.
There are 7 metabolic pathways stemming from the Urea cycle that lead directly to muscle fibers.
unless injecting it which is the positive studies, i stand by my opinion.