I tried L theanine and I feel it loses it's magic fairly quickly. I even took a months long break and never regained it's effects.

I read somewhere that you must take d3 with vitamin k2, to prevent calcium from going where it shouldn't. Regardless, people should have their vitamin d levels checked before supplementing.

GABA doesn't cross the blood brain barrier, so the effects of that are debatable.

B-complex is good, but the majority of them have very high doses and these doses can have serious consequences.

I hear good things about the cbd oil, and the fish oil is good as well.