L- Citrulline-DL- Malate 2:1

The recommended daily supplemental dose of L-Citrulline is 200-1000 mg once a day before bed (at the same time of the day when you ought to be taking your L-Arginine supplement). L-Citrulline supplements may be difficult to find on their own as they are most likely going to be combined with L-Arginine or included as a part of a collection of supplements meant to do a number of specific things. This is why the dosage amount can vary so greatly. The lowest recommended daily dose is the 200 mg while the most that you will want to take in a 24 hour period should not exceed 1000 mg. You will need to keep this in mind especially if thus supplement is combined with other supplements that are taken in high doses or more than once throughout the day.