Overall Rating 
Product Claims
Made by Cellucor. Enhance adrenal output. Increases metabolism.
Comparisons
Xenadrine EFX | Hydroxycut | Lipo 6 | Trim Spa | Burn 60 | Lipozene
7 Nov 2009 - Richelle of Texas, USA writes:
I have been taking this product for 2 weeks. At first I had a little gitters but that was only when I did not eat my 5 small meals on time. I started the 2 pills twice a day the 2nd week and feel so full of energy. I have lost 5 lbs. I am 5ft3in and started at 149lbs. Now I am 144 and it is only my seconds week. It definately has cleared my mind and given me more mental focus too! I feel like I can take on the world and still have energy left over. I am losing weight and not even working out! Remember to use 8wks and then staff off 2 weeks.This is the fat burner for me!
20 Oct 2009 - Monica of California, USA writes:
I suppose this product isn't for everyone. I too got the jitters and freaked me out. after a few days of taking it I felt the energy. Do my workout plus other, but it suppresses my appetite only temporarily, it seems like I am hungry all the time now, much more than before and am gaining weight and I am on my third week of taking it. I'm not a heavy girl but I am petite. Will take till the end.
6 Oct 2009 - Pat of Illinois, USA writes:
I just purchased D4 from my local GNC with wishful thinking... It says to take 2 pills, but that was an extreme mistake! My heart felt like it was going to explode, and not to mention the horrible jitters you may experience. I dont even understand how you can exercise on this without keeling over and having a heart attack? Bad product! Use with caution, 1 pill only! I have lost 4 lbs in 5 days though.
3 Oct 2009 - Mike of Texas, USA writes:
I am currently in my 6th week of using this product and just like I figured its crap. Felt energy in week one, well now I'm in week six..... nothing. I do cardio twice a day 5 days a week and weight train........ results?........ nothing. Not an inch or an ounce. I wasn't expecting anything extreme because I understand its all marketing. I'v tried alot cheaper products with better results. I'll chalk it up to lessons learned, I wouldn't recommend this product to anyone.
28 Sep 2009 - Ice of California, USA writes:
So I'm down to lose the last persistent 5 pounds. Tried this product as instructed (one in morning and one at noon) and it is okay, no crash. I am 5'0, 105 lbs, female, doing martial arts twice a week (1.5 hours) and weight/circuit training once or twice a week. It gave me the same caffeine boost as a Tall Starbucks coffee, difference is that it masks the feelings of exertion; hence, warned me to always consciously check for my heart rate. I would recommend taking this pill after eating, and no later than 1 or 2 pm (in order to sleep at night!). Also, I do not recommend working out cardio or circuit training when the pill is at its peak (around 1 to 2 hours after ingestion) as it can lead to a very fast (undesirable) heart rate (simple weights is fine). On my third day already, will check back in later to document results.
26 Sep 2009 - VAL of Florida, USA writes:
I have been walking 3 miles 2-3 times a week for two weeks now with my sister who's been at it longer. By the time I am finished I am done. Too tired to move. Determined, I hit the walk with her this morning and again was drained. This afternoon I remembered the D4 extreme samples I had gotten a couple of months ago. Since it was after 3pm, I took 1. An hour later I was so full of energy I called asking her to go do another 3 miles in the evening. Couldn't get in touch with her, so I had to work out some of that energy at home. I also went to GNC and purchased a bottle. When I was given the 2 pack sample I thought it would not be enough to make a determination to it's effect. I was wrong. I will take 1 in the morning and depending on my energy level, may take the second dose. I'm excited to see where I will be in 4 weeks. Obviously everyone's tolerance level to different products will be different. Had I started with 2 pills I would have been in big time overdrive. I will update this forum of my results after my bottle is completed. Giving it a 4 for now since it's only day one and 1 dose.
9 Sep 2009 - D of California, USA writes:
I first tried samples and used the product as directed. I made sure I had food in my stomach and drank plenty of water. I started with a half dose (as suggested) and have been fine. I have a history of anxiety attack and irregular heart beat even - and i felt no heart racing or antsy-ness. I felt more able to accomplish tasks at home (rather than crashing after a day's work). Since the half-dose is working fine for me at this point I feel no need to increase. People need to act as responsibly as the sales people and product packaging does. As consumers we have to be responsible in what we put in our bodies. I was. I did. And I feel this is a good product when used appropriately!
23 Jul 2009 - Amber of Ohio, USA writes:
I was introduced to D4Extreme,after many ineffective products.I am a few days away from the 2 week break.I am truly happy with this product.I have lost over 5 inches off my abdominal area,and several off my thighs.The cravings of food I used to have are not nearly as high.I refer people to this product all of the time,it has been a blessing to me.I have gained confidence in myself.Its great to try on clothes that did not fit,only to find they do now.Try it,I'm glad I did.
30 Jun 2009 - Al of Wisconsin, USA writes:
I would highly suggest sampling this product before you invest in an entire bottle. My friend and I were each given a free sample of D4 (which came with two pills - half a daily serving) and took it shortly before training. Ten minutes later, I was in the bathroom vomiting (I have tried many other fat burners and have NEVER had this kind of experience). Throughout my workout I constantly felt like I needed to vomit, felt extremely light headed and was sweating horribly. It reminded me of having a terrible fever. Half a serving contains over 290 mg of caffeine so beware! Not for the faint of heart, literally!
23 Jun 2009 - Mom of 5 of Virginia, USA writes:
I have been taking the cellucor d4 thermal shock for about about 6 weeks now. I take one when I wake up first thing and one before lunch with a glass of water. It works better when you drink more water. I have already lost about 10lbs, my clothes fit better! I don't exercise, just work everyday as a receptionist. The biggest thing I noticed about this is that I am not as hungry as I use to be! I do have more energy too. I stopped drinking so much coffee and this takes it place better. I don't feel any other side effects except the urge to move around more. I would not advise this full strength for a non-caffine drinker. Also I don't advise taking it up to 6 hours or more before you go to bed or you will be up all night and crash the next morning. I also don't advise a woman using this if you could become pregnant, you are pregnant or nursing.
21 Jun 2009 - Samantha of Florida, USA writes:
I had just found out I was being divorced against my will... I looked at myself in the mirror... at 5'6 and 203 lbs, who blames him! So I asked my best friend who is skinny and looks just like a barbie what to do. She handed me a yellow tin bottle with ten white pills in it. I took one a day and was hooked. It does make me hotter than normal, and sometimes I can feel my heart racing when I work out... but those are both side effects I happily accept for the results. I took them to my doctor to ensure they are safe and they were, even for military personnel. I was a size 18 in pants and weighed 203 lbs. back in February... well, it's June, I'm a size 8 and weigh 140 lbs. It's still going. The 2 weeks that I had to take off (as per the label) didn't result in weight gain like most products. Since taking these, I have reffered over 23 people and have helped them lose a collective total of over 250 lbs! I still eat my beloved chunky monkey ice cream and don't work out like a body builder, and it's still melting off! I'm hungary less and have more energy! Do yourself a favor and at least give it a shot! Right now!!!
8 Jun 2009 - Deanna of California, USA writes:
I stopped by GNC. Explained I have had NO energy for months, gaining weight like crazy, work 6 days a week til 2-3am. Told me to try cellucor D4 Extreme. I've only been taking it for 4 days. I'm amazed at the energy I have! I find myself cleaning instead of laying around! I'm waking up earlier. I can only handle taking one pill at a time. 2 pills I became really nautious. YOU have to drink lots of water. I'm not craving sweets! I have a chocolate pie in my fridge that IS NOT calling my name! I've lost 2 lbs (water weight I'm sure) I don't find my heart racing/ don't have jitters. I've tried lots of things! Keeping a diary and I'll update in a month!
4 Jun 2009 - Dana of Florida, USA writes:
i'm 5'4", weight 128lbs. i lost a few pounds on this product. but i missed my period and i think it's because of the d4 thermal shock that i have been taking. any other women experiencing the same symptoms?
20 May 2009 - Eric of New York, USA writes:
So I heard about d4 and was intrigued. I tried it and was freaked out by how fast my heart was beating and how much my hands shaked. But you get used to it and it's not so bad. I am 5'7 and weighed 217lbs a month ago. I stopped drinking and ate very healthy. I now weight 190lbs. This pill is designed to give you an amazing amount of energy and gives you hardly an appetite. So instead of sitting around after work eating everything in sight, I actually go for a 3 mile jog. After a month my cardio and weight lifting has doubled all thanks to D4. Take With Food(as soon as you wake up with oatmeal and a gallon of water a day. If you don't you will want to throw up at the gym. Give a try it's an awesome supplement.
18 May 2009 - Fahad of Ohio, USA writes:
You shouldnt waste your money on this. If a supplement works well and is pricey I will buy it, but this doesnt even work. The first time i took it within 20 minutes it gave me a headache, and i only took one pill. I have taken a lot of pills and am not sensitive to them. I didnt feel pumped i actually was tired and didnt feel like working out. I even tried the pills a few more times and all i got was headaches and no pumped feeling. Dont buy this it doesnt even work and its pretty expensive.
14 May 2009 - dill of California, USA writes:
i've lost 30 lbs and now i weigh 130... i'm a guy and am trying to cut down to my lowest weight possible so i can complete in an mma league so i have the advantage, so all my excess weight will be muscle/no fat... i've lost some strength, but thats only because i've had such drastic changes in weight, i dont have the same support my old weight gave me... i'm not weak by any means, to give you an idea i can easily leg press 600 lbs and if i want to force myself, and also lift significant amounts of weight for my size. i've also started lifting for strength, not size, so instead of benching a couple 185's throughout the day i've narrowed it down to 100 and just do crazy reps of it a couple times a day... my arms are staying the same size, but are more rocklike, but my chest and stomach are slimming down tremendously... i don't really know how long ive been taking it.... i started 1 cap twice a day for about a week.. stopped for a week, then went back to 1 cap/2wice a day for 3 days then went to 2 caps twice a day for about 2 weeks maybe... it definitely works... the side effects i have are cold sweats, jitters, insomnia, and i had a little pain in my stomach for like 3 days but that went away once i got used to it. its definitely doing its job, but at what cost? not sure, lets hope i don't find out. i have also been actively taking adderall and smoking bud which both effect my eating habits. (adder all severely suppresses my appetite and bud does the complete opposite, haha, so maybe they cancel each other out?) the only thing is that i wont have an appetite throughout the whole day until i smoke, then i pig out and eat like 3 sandwiches or something... if i wanted to lose more weight quicker i could even stop smoking and force myself to eat about 8 tiny meals throughout the day, but i'd rather still have the energy from eating and i'm not looking to get too skinny until i put on more muscle. hope this helps!
8 May 2009 - Melissa of Illinois, USA writes:
All winter, I've had trouble keeping food out of my mouth--and my weight crept up. I'm 5'7" and usually 132 lbs, but I ballooned up to 145 and freaked out. I started lifting with a PT and she's a Cellucor sponsor, so I decided to try it out. Mind you, I don't agree with diet pills. I'm a firm believer in diet/exercise, but I'm desperate to lose this weight before the summer and my PT is reputable, so I gave it a go. I'm currently just taking the D4 Extreme and the first couple days were a little rough (had trouble sleeping, headaches). I realized that I wasn't drinking enough water. I also take a pill no later than 2 p.m. so it wears off by the time I wind down for the night. It's been a week and a half and I already notice that I'm not very hungry (thank God) and have a fair amount of energy! I don't weigh myself often, but I last weighed 142.5. I work out 5 days a week, doing weights and cardio. I think the best thing about this product is that it curbed my appetite. Yeah, I know it sounds easy not to put food in your mouth, but when you're stressed about deadlines and sitting on your butt all day, it's not that simple! D4 has finally helped me stick to a low-cal diet and gives me the energy to have great workouts! Gold star!
4 May 2009 - Weedalys of New Jersey, USA writes:
this product is awesome!!this is my 4day using it and i already lost 3 pounds in 4days pluz i have crazy energy like i never had b4... i highly recommend it.... i have try soo many weigh loss pills and none of them have work for me....
1 May 2009 - Aaron of Arkansas, USA writes:
I just started taking d4 t.s. a couple of days ago, one after breakfast and one after lunch, might be a little much especially in the beginning but my last one of the day is never past 1 o'clock p.m. If they say that sleep is one main priority of getting lean and in shape and all that fun stuff, how do they expect you to actually get some sleep on this stuff. Insomnia is DEFINATELY a side effect and the only ive had so far. Im tossing and turning in bed til about 3 am hoping my tylenol p.m. will work but it doesnt, since ive been on it ive been averaging about 4 hours of sleep a night compared to my original 7 hours. Any response to this or do i change my habits cause i really want to get my body fat % down and this is the stuff to use i hear.
16 Apr 2009 - Billy Vinci of Illinois, USA writes:
This product definitly puts your appetite to a hault. The only way your not going to to lose weight on this product is if you are just bored and eat, Also this product gives you massive amounts of energy it's nuts! Youll be sitting there and then youll want to run or lift out of nowhere. The only 2 downsides to this product are if you dont drink enough water you are going to cramp HARDCORE, also the only side effect I have seen is Insomnia
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