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iHerb Customer Reviews

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Smoothest energizer ever!

Posted by iHerb Customer on Jul 03, 2011 | Verified Purchase

I have tried many energizers and this is the smoothest of them all. Energizing without nervous side effects.

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Excellent energizer, smooth and without a crash

Posted by danarm on May 05, 2014 | Verified Purchase

I have tried a lot of energy drinks, supplements and even medicines such as Provigil (modafinil). So far, Vivadrein is my favorite. It is time released so the energy lasts a LONG time, it has the right dosage (1 pill is perfect for me), it's healthy because it contains green tea extract and also taurine which "takes the edge off", lowers blood pressure (which caffeine elevates) and helps with the energy production. One thing I would like to see in this would be a bit of added theanine.

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Posted by iHerb Customer on Dec 07, 2012 | Verified Purchase

Another great product. Really gives you energy and peps you up when needed especially when working out. Love it.

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Not for me

Posted by iHerb Customer on Aug 23, 2011 | Verified Purchase

First, this is a high quality product. Small oblong shaped tablets. But this product doesn't give me energy at all. I think it's the taurine in it that puts me to sleep.

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