re: Anyone ever tried Alpha Brain?

Yes.
It is B vitamins, amino acids, and herbal supplements.
It helps a little bit, but honestly it's a rip off.
I got it as a hot deal on Amazon while it was half price for a few hours, so I took a shot on it to test it out.

Like I said, might help a little with focus but not worth the full price, which is something like $40 for 30 capsules.
"Suggested Use" has you taking 2 a day. I was doing 1/day. So maybe if you go all out with it as directed, it would help more.

But that's $40 for 15 days. Might be ok for your temporary purposes but as a regular daily routine, way too expensive.