I suffer from permanent weakness (against the backdrop of the lowest pressure), and the pace of the day require other returns. And this guarana capsules came to the court. Prior to that, tried some of the powder from another vendor (too bad, but there were a lot of foreign components, I was not particularly interested, but still contributing to the nutritional value of the product). This guarana operates smoothly and immediately. That is, the last effect gaining strength in tech. 40 minutes and from there it proceeded in its calculations when taken. This tool starts to work immediately, but I personally sunk enough for 6 hours maximum. Do usually in the evening, as a home from work, I hit it, and it is necessary to train. Guarana - savior. Train goes great with fatigue (which previously prevented much) there is no trace. Runs and operates smoothly. I recommend. And the price of red for these substances.