I know that L-Citrulline is a very beneficial pre-workout ingredient if you're after a solid pump, but how long is it effective for? I normally take it as part of a pre-workout and drink it whilst on the 30-45 minute journey to the gym, but are the effects and benefits of L-Citrulline only acute and short lived? Or can it have a build up effect leading to better and faster pumps over time/long term use?