L-arginine is a semi-essential amino acid that the body can synthesise in small quantities. But this is often not enough for athletes and higher quantities of L-arginine need to be taken in through the diet to properly support long-term training. There is no indication that taking arginine supplements on a regular basis stops the body from producing its own.
Take 4 capsules pre-workout with plenty of liquid. Take 4 capsules a day if you exercise more than 3 times a week.