A key benefit of taking a pre-workout supplement is to experience bigger muscle pumps whilst you are training. For this reason, many of the best products on the market contain ingredients to deliver this. Basically, ingredients that raise nitric oxide levels are effective in enhancing muscle pumps. But there any many nutrients that claim to offer benefits, but haven’t shown to deliver them in any studies. Arginine is one of these ingredients. It plays an important role in your body, to raise nitric oxide production. However, Arginine doesn’t have the same effect when consumed through oral supplementation. In this article, you’ll find out:...