I stumbled across some information about Rhodiola and after some research I decided to try it for a source of energy. I was already pushing the limits of caffeine and it wasn't enough. From the very first day I felt better. More energy, less frustration and pointless anger. I feel more like myself on a good day. I might try a slightly larger dose by taking 2 in the morning as I have been but also adding 1 in the afternoon as well. It doesn't give me any type of jitters or over the top sort of feeling. Just more stamina. I am able to accomplish more in the course of my day with fewer rest stops. It has not interfered with my sleep in any way. I drop right off as usual. I will say that I actually feel more rested when I wake up and it takes far less caffeine to get me going in the morning! I wish I had found out about this sooner! Great stuff!Gives me a calm yet upbeat feeling...I researched vitamin manufacturers and life extension is worlds ahead of 90% out there. Look for yourself. Price is within others but at least you know what your getting.This gives me energy. I like to take in morning before workoutI decided to look into this supplement after reading about it in numerous magazines. I was a little concerned reading the Amazon reviews because I have pretty severe insomnia and am sensitive to any kind of stimulants, but I decided to give it a shot.I've been taking it for close to two weeks now and so far, I'm pretty happy with it. It DOES give you an energy boost, but its VERY subtle. I tend to feel every little heart palpitation, etc, but I didn't notice anything like that...just an overall boost in energy. (and I was kind of looking for a weird sensation or feeling)For me, caffeine or herbal stimulants "feel" like an artificial boost....the Rhodiola does not. Its just that I feel more energetic, but still operating at a normal level. The first couple of days, I took it around 10:00am-11:00am and I noticed that I didn't sleep well those nights. (Again....I have insomnia anyway, so I can't say it was caused by the Rhodiola.) After that, I decided to only take it before 10:00am. For the average caffeine drinker, I can't imagine that this would cause any serious sleep disturbances.Honestly, I'm kind of surprised that I like this as much as I do because of my weird sensitivities. Since taking it, I have found that I am getting more done and am better able to focus on what I'm working on. It seems to "center" me during the day and I don't get as distracted doing mundane tasks.I'm going to continue taking it as long as I feel these benefits. Note: The only reason I didn't give it 5 stars is because I don't know if the supplement added to my insomnia or not. Its hard to know for sure.Rhodiola is known for providing energy and that's why I purchased it. In this respect it does a decent job. I don't like energy drinks because they make me jittery and nervous. So I researched rhodiola and it appears to be quite safe.On my workout days I take 1 capsule about 8 AM after breakfast. In about an hour or two I can definitely feel a subtle boost of energy. It's not overwhelming though like with some energy drinks. Also it doesn't have caffeine or anything harmful. It seems to increase my endurance as well as my energy. If you take it late in the day, however, it could cause some insomnia. That's why I take it early. For me it seems to last about 12 hours or so.When I work out about 11 AM I seem to notice some increased energy for a better workout. It's not a placebo neither because I've forgotten to take it a few times and noticed more tiredness than when I do take it. I've also tested my blood pressure at various times after using rhodiola and so far, my blood pressure has not gone up. It seems that although this gives you an energy boost it doesn't seem to affect my blood pressure. Overall this product did what I expected and I will most likely order it again.Although I had no negative side effects that doesn't mean you won't since everybody's different. I recommend starting with half a capsule to see how it affects you. That's what I did the first 2 times I used it. When I saw the affects were positive I took the whole capsule and as I mentioned it works well.My wife was diagnosed with the onset of macular degeneration about 10 years ago. She has been religiously seeing her retina specialist every six months and adhering to his recommendations. In addition to AREDS she is also taking optimized folate and rhodiola.Since she worked for a holistic DO many years ago, she has always preferred the Life Extension brand of supplements. We previously belonged to their Rewards program but I've since discovered that I can get just as good of deals on Amazon as with their program. And I don't have to order multiple units for a lower price.Yes