LIFENOW L-Arginine (1000mg) Serving Supplement, 60 Vegetarian CapsulesL Arginine is an amino acid found in few foods such as meat and dairy products. They are also added to some whey protein supplements and L Arginine remote supplements. Why Is There A Supplement For L Arginine? L Arginine is a non essential amino acid. Hence, there are times and situations where the body is not able to produce the required amount of arginine, like when you are sick. Also, the amount produced is highly dependent on your age, gender,