I dont know about IM , but arginine powder is a staple in my regimen... the difference in cost is the only reason I dont use injectable you can get 2lbs of powder for about 25 $ or 30ml of injectable for 50$ , its a no brainer . As far as dosing I would start at about 5 grams of powder and wouldnt exceed 8grams . I hover around 230 lbs and 8g is about all my body can handle before it starts fucking my stomach up pretty bad . But arginine pre workout with like 50-100 grams of karbolyn or some fast acting carb drink make for some pretty damn awesome pumps in the gym . I also reduced my blood pressure significantly once I started supplementing arginine so if you have any hypertension that is definitely another benefit it could potentially have for you !
