Bests & Worsts Reviews from Amazon

I have been taking two of these per day for a month and a half, with high hopes based on the abundance of quality reviews. Maybe the effect on me has been too gradual to notice however I do not feel like I feel any difference whatsoever compared to before I started taking them. Energy levels, focus and memory all still vary by the day as they did before. If anything, memory and focus feels like it might be a bit worse. Additionally, I will sometimes get a headache soon after taking. Assuming the reviews are legitimate I'm glad it works for others but this is an honest review for something that so far is not living up to the hype.