Bio Energy - Enhanced Caffeine Pills for Energy and Focus - Enhanced Concentration, Memory & Clarity - Thermogenic Supplement for Improved Metabolism in Men and Women (60 Veggie Capsules)

I bought this to find a suitable replacement for 5 hour energy, as they are quite pricey. This only contains 2 ingredients, and I researched them, so I figured what the hell. Well the amino acid l theanine is generally safe, however everybody's body chemistry is different. The first day I took 1 pill, and I didn't notice a thing. The second day I took 2 in the am, and 2 more late afternoon. It did enable me to get more accomplished, but it didn't provide any significant energy. But on the 3rd day, I was so messed up, mentally. I called off of work, which is something that I hardly ever do. I am not above saying I was contemplating suicide- even to the point of planning it out! That is a really frightening feeling, and I can only attribute it to the L theanine, being is it works on the brain.I am not going to take this anymore, nor do I recommend it to anyone.

My original review is below and I stand by it. But I had a problem yesterday and I want to share it. Primarily my fault. Don't make the same mistake.Took 2 capsules before going to the gym - as usual. Felt great and did well when I arrived, on my first few exercises. But then I started another and couldn't finish without cutting back the weight. Went on to another machine and couldn't get through the first set, so I went home. This is very unusual for me. Sat down at my computer and in half an hour I realized, I could hardly sit up. Made it onto the couch and zonked out cold for 2 hours. I occasionally take a nap, but not like that. But I know what happened.I normally drink 2 mugs of coffee in the morning. Yesterday I had a third, around noon. Before going to the gym I take a 4 ounce energy shot and nitric oxide precursor, and I did yesterday. Then 2 of these. Counting back, I realized that was the equivalent to the caffeine in 6 cups of coffee in 6 hours, plus the other stuff. I believe it was the caffeine; never had that much before. It jacked me up, I felt great. And then I just crashed. When I woke up I felt ok but a little stomach upset. (Might have been unrelated, it was 7:30 PM by then and I hadn't eaten). I got some supper and that went away too, and I was fine then. I still am, no after effects. But I don't want to go through that again. I wish I had ordered the Theanine without the caffeine, since obviously I get enough from other sources. And I plan to do that. But until then I'll stick with just 1 capsule each day and try to limit my other caffeine. 'Nuff said.My original review is below.This is a very preliminary review. I got this product in the mail today and took 2 capsules about an hour before I went to the gym. Felt nothing much different before I got there, certainly nothing negative. I must note that I am cautious because I am allergic to some BCAA's and especially in large doses. But I had no problems along that line.But as soon as I got on the exercise machines I sure did feel it. I wasn't really any stronger, but I had energy to burn; I wanted to rip the handles off the machines. (A good thing, in my opinion). I've been going for years and sometimes it's hard to get up much ambition. But not today. Felt great the whole time I was there, and when I finished up one thing I couldn't wait to get on to the next. A great feeling, for a change.Time will tell about a lot of things, but right now I'm extremely optimistic that this will be a great help to me. It's a little harder to judge, but I also did feel I was more focused on what I was doing. And that carried over when I got home. I had several things to take care of and I was able to keep going and do them all. Only slight negative is, the feeling took about 6 hours to wear off, but If you're working that would be a good thing.I saw some negative comments that people didn't feel "relaxed" as they expected. Maybe I missed it, but I saw nothing in the description that promised to make you more relaxed. I saw, "more focus and energy" and that's what I got. And although i felt a little "jacked up" I never once felt jittery.I'll update if anything changes when I finish the bottle. So far, good stuff.

These are my initial impressions. This product wakes me up enough to get to work but not without a cost. Three to four hours after I get to work the headache hits me and my eyes get tired. The feeling of tired eyes, eyes that just want to close, combined with the headache make me want to find a comfortable piece of floor and sleep.Perhaps what I am feeling is the caffeine crash because I only take one capsule when I wake up. That's all I wanted. Something to kick start my "morning." (I work the graveyard shift) Instead, it gets me through my morning and by the time I get settled in, I'm ready for a nap. I have no desire to take another capsule. That would be too much caffeine. The amount of caffeine I'm already using is making it difficult for me to sleep when I need to.So, while this product does wake me up, it's about as good as really strong coffee or No Doz, which is a lot cheaper. For me, there is a significant crash period instead of a seamless transition to a natural wakefulness and a residual headache that lasts the day and cannot be "cured" with pain killers. Everyone's biology is different, however. I don't have the same tolerance for caffeine that I did when I was younger I suppose.