I ve recently been body building, and I do take supplements such as an increase in arginine and glutamine. I take tons of protein in a day ( Pro Complex if you want to see the Nutrition Facts ). However I am in Indiana, and the weather is changing. I do take a nitric oxide supplement before working out. But I know Arginine does help with blood circulation. The concern here is, my head sometimes throbs when I m doing any heavy weight, and I have gotten two bloody noses while lifting. Now it could just be the crazy wheather here in Indiana.But it is bleeding through the right nostril which is the scary part. Could my supplements be doing this, or more then likely just the wheather change from winter to spring?