L-Arginine does not work by itself. It works in concert with L-Citrulinne. If you Grizz's old posts you will find answers.
As per Dr.Ignarro....
L-Arginine - 400m to 600mg
L-Citulline - 200mg to 100mg
Vitamin C - 500mg
Vitamin E - 200IU
Folic Acid - 400-800mcg
Alpha Lipoic Acid - 10mg
All are daily values and can be taken before bed time or divided in to morning and evening.
Beet juice can be consumed two to three times a day.
My NO levels were toaly depleted. I read the book by Dr. Ignarro and have been taking the supplements for two weeks now. My NO levels are much better but does not get to the target level.