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iHerb Customer Reviews
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Great for focus and concentration

Posted by Harpocrates on Jul 21, 2013 | Verified Purchase

A great precursor to Dopamine. Highly recommended!

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excellent value

Posted by Reviewer1275887 on Sep 28, 2010 | Verified Purchase

Twinlab's products are high quality. I especially liked the addition of other nutrients necessary for tyrosine absorption. Saves taking additional capsules. A company I trust and have used for years.

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