I've been using NEU Extra Strength Nootropic Energy Shots for over 6 months now in place of the more popular energy shots that can be purchased from the local convenient or grocery store. I had to stop drinking coffee 👎😭👎😭 after substantial surgeries made coffee much harder on my system. I started with the popular energy shots to replace the coffee but found myself having to take an additional shot to maintain focus/productivity/etc, especially on the longer days of work. No matter how many shots I took, I still had to battle jitters, restlessness, etc. until I tried the NEU Extra Strength Nootropic Energy Shots. I take one NEU shot in the morning right as I wake up and that's all for the entire day. I don't have any issues with my stomach, don't intake any other caffeine, no issues falling asleep or with jitters, restlessness, anxiety through the entire day. I absolutely love this product and I've recommended it to anyone who buys energy shots with a stated time frame of effectiveness. NEU shots last all day for me, adding productivity and focus to my daily routine that I do not get without taking it or while taking other products. Please feel free to contact me with any questions or comments about this product and my experience. I will gladly take the time to share more of my experience using this product if it helps you make a better, more-informed decision about purchasing this product. I hope NEU will be able to offer a subscription at some point so I don't have to worry about running out. Thanks for taking the time to read this review and I hope you experience the same results!