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hmm

Posted by iHerb Customer on Apr 22, 2016 | Verified Purchase

nothing changes

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focus

Posted by iHerb Customer on Oct 05, 2013 | Verified Purchase

Increases my concentration.

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SO so

Posted by iHerb Customer on Aug 20, 2010 | Verified Purchase

I cannot tell if this has done anything for me.

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1-3 of 3 total