I take Focus Factor daily and it is a big deal. It is basically a multivitamin with an above average dose of a few, particularly brain related, vitamins, alongside other things that seem to help the vitamins work. It can really, really help me focus and think clearly. Given that, with a good deal on amazon, they cost about as much as a normal multivitamin, I have just started taking them every morning.
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"Listen deeper to the music before you put it in a box" - Tyler the Creator - Sandwitches