I don’t think l-arginine does anything but supplement the supplements and increase sperm production. As I’ve understood from several different boxes of arginine it’s not approved by the food and drug administration. As if that was going to make me feel safer.
Iv been using 1800mg pr day for some months now, together with minerals, vitamins and of course omega3. Can’t say I’ve noticed anything very different. I never get sick or nothing anyways, but ill hype it up in my brain and take whatever placebo I can squeeze out.
Almost no supplements are approved by the FDA: they are marketed as natural heath products and are therefore not required to be approved. This includes vitamin C pills and stuff btw.
Also just because something is a supplement to what is already in your diet doesn’t mean you don’t have to cycle it: creatine needs to be cycled, and its found in decent amounts in meat and other normal food products.
I would say from a common sense standpoint that you should cycle l-arginine.