I Use pure Arganine...
Now L-Arganine At 4 G per serving (2 2/3 teaspoon or 13 mL) that has 113 servings at about 21 cents each.
Because of the hocus-pocus approach most people here take to using NO precursors, I have to assume that you don't have a clear view of what it really does as an antioxidant and NO precursor.
L-Arganine (4-6 grams) works even more powerfully when L-Citrulline (200-1000g), Vit C (500mg), Vit E (200iu), Folic Acid (400 - 800 mcg) and Alpha Lipoic Acid (10mg)
per day are taken as well. Most of this is covered in your multivitamin or antioxidant.
Your diet can positively or adversley effect NO production.
Best times to take L-Arganine are pre bed or pre workout.
For a deeper understanding of its use and history you can read a very simple book by the doctor who won the Nobel Prize in Medicine for discovering the importance of Nitric Oxide to the cardiovascular system.
Dr Ignarro's book NO More Heart Disease