Source Naturals Guarana Energizer Caffiene and Energy* - 900 mg,100 Tablets

My wife likes the energy boost when finishing work in the yard.

I have worked overnight as a Registered Nurse for the last 4 of 6 years and I will offer my own experience on how these pills have helped me in my job performance. To start of with I have to say that no two human beings are the same so before I bought these pills I read the good and bad reviews and wasn't sure on the product. I've had heart palpitations in the past from excess caffeine when I drank one of the blue pop top Rock Stars with 1.5 times the caffeine as regular Rock Star and I can say that no, it's not fun at all. I've also experienced when I drink to much caffeine at once and find myself either visiting the restroom many times during a shift, or the crash that comes after the initial burst of energy. Anyways, I can say that with ONE pill a shift prior to going to work, I am able to stay awake and not in a forceful manner without the many negative effects from caffeine that I've experienced in the past. Working night shifts, I've seen how many co-workers need to chain drink coffee all night. I can't say that I don't like coffee, but I don't drink it more than once a week and I prefer not too if I have the chance. This is why I am glad that the Guarana Energizer has worked for me. I am able to be more alert all shift long, not have to struggle with energy or struggle with staying awake, and when I get home I not too wired where I have a hard time going to sleep. On my days off it also works as an excellent energy booster for the mornings to get your energy level going for your day ahead. Also, I've tried other guarana pills when the Source Naturals were no longer in stock (same 900 mg strength), and I have to say that I had to take more than 2 pills per shift to keep me awake, plus they never lasted a full shift. Don't know why the "energizer" term makes a difference, but it does for me. I recommend it to all my co-workers, and when they feel low on energy I've seen that even 1/2 a tab is sufficient for a little pick me up especially for those sensitive to caffeine.

I suppose I ought to stand in front of a group of people, and admit to being a caffeine addict. However, I rather like caffeine. I started in on caffeine at an early age- first by drinking soda- mostly cola- as often as my parents would allow. As a teenager, I discovered coffee. Later, it was espresso drinks- I loved a good quad-shot latte, and eventually was getting several a day. A few years ago, my stomach stopped agreeing with coffee as much, so I switched to energy drinks. I was drinking about 4 Rockstars a day. After doing the math, I realized that I was spending around $300 a month on these silly beverages. To economize, I switched to No-Doz. However, it wasn't the same, and it honestly felt... unnatural. The No-Doz sometimes aggravated my stomach, and I just didn't feel as well. Then I tried Guarana, as it is one of the main functional ingredients in many energy drinks. Love it. It seems to last a bit longer (it could be my imagination there, I am unsure), and it definitely feels more natural. I take a few of these per day- and I seem to have less of a "caffeine crash" after 4 hours or so than I once did. It still happens, but it's more gentle. My only complaint is that the pills are rather large- definitely a chore to swallow! Bottom line- this stuff costs just a bit more than a bottle of No-Doz, and is made from natural stuff. It feels healthier, and probably is. I now spend in a month wha I spent in a day on energy drinks. Also- for what it's worth- I've tried other brands of guarana, and this one "feels" best.

These are pretty strong so I always have to cut mine I'm half or I would be barfing. I usually take half of one a day if I'm needing energy. 900mg is a lot so i would not take them on an empty stomach. I have tried several other natural energy boosters, such as ginseng another just do not touch these. Fyi- I don't drink coffee or caffeinated beverages so I'm not sure if it would effect you're results if you did. However, I am not one to feel a "difference" if it was to have a coke...if that helps. Definitely wouldn't take these close to bedtime either. You'd be up all night. UPDATE- 5/24/13 I wrote this review before I opened this new bottle. I did not purchase my first bottle of guarana on Amazon but it was the exact same as this except it was the bigger bottle. These DID NOT have nearly the same effect as the ones I had taken before (same mg. and brand). They do not give half as much energy or zest as the other ones did. Weird. I can take almost a whole one of these and my stomach does not get upset at all but I believe it is because it is not as strong as the ones I previously had taken. This is probably why the other viewer said they did nothing for him. Also, the bottle I seem to have gotten has added calcium (which is not shown in the pictures above). I also bought mine through Vitamin Life (on amazon). I am currently waiting for them to write me back concerning this. Source naturals website does not even offer the blue bottles only the pinkish ones...so I would be a little cautious of that.

This is a great supplement to have around, especially because it's SO easy and economical compared to coffee. I would happily rate it 5 stars BUT I have to admit that the first few times I took it, the jitters it gave me were pretty extreme. It didn't bother me AT ALL, but I know that it would be WAY too strong for a lot of people. However, if you're not a stranger to over-loading yourself on caffeine (or other stimulants) and you generally like its effects, this should be a great supplement for you. Very importantly, the jitters went away by the 4th day I took it and now it's hardly noticeable. I started using it so I could easily lower my daily dose of Adderall (prescribed for ADD) and it did the job well.

だるい時、テンションが上がらない時、 不安な時。ネガティブな感情の時など 限定的に使ってます。

This definitely works but take with caution. I felt very wired and had panic attack symptoms.

I read a lot about Guarana benefits, but after I used this product for a month, it doesn't do any effect at all !! even after taking double dose (4 tablets at morning) still nothing happens at all !! no good effect of any kind !! avoid and save your money.

-