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This product will help you to concentrate on what you have to do: work, study, gym. Sprint is what you need to focus on what you want to. However, procrastination may increase. Make sure you take it just before working for more focus. The experience with this product may vary depending on the metabolism of the person. If you are sensitive to caffeine, look better for another product that will help you like only vinpocetine or modafinil. It is the most economical alternative that I have seen in the market. However I am concerned that it is a complement to another product. The levels of vitamin B and caffeine are high with respect to other supplements and, in my case, I have experienced dizziness and cracking. I can affirm that this product has served in my experience although there may be better ones. And I do not recommend taking it together with an energy drink.Read full review
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