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Cellucor D4 Thermal Shock Review - Does This Fat Burner Really Work?

By Summer Banks on Nov 22, 2016
Cellucor D4 Thermal Shock Review

If you haven’t looked carefully at Cellucor D4 Thermal Shock, now’s your chance. Here at DietSpotlight, we conducted an in-depth review, focusing closely on the ingredients, side effects, customer service quality and scientific research. We additionally examined numerous dieter comments and customer responses from around the web. Finally, we condensed this information in order to give you the bottom line.


What is Cellucor D4 Thermal Shock?

Firstly, Cellucor D4 Thermal Shock is marketed as a high-energy fat burner. The ingredients are amla fruit extract, caffeine (150mg), white willow bark extract, octopamine hcl, yohimbe bark extract, evodiamine sclareolide, passion flower extract and n-acetyl-l-tyrosine. It is claimed to help improve mental focus, control appetite, heighten energy levels and burn off unwanted fat. You simply take one capsule in the morning and one again in the mid-morning (along with 8-12 ounces of water).

Cellucor D4 Thermal Shock has been available since at least 2010 and it can be purchased online. This supplement contains natural ingredients and there are some customer testimonials posted on the official website, but read on…

Adverse Effects – “Something to Consider?”

The Cellucor D4 Thermal Shock side effects are our first concern. According to our Research Editor, “The Yohimbe Bark Extract in this supplement can lead to unpleasant reactions and even heart problems, especially when combined with caffeine.”

One user stated, “Gave me severe headaches every time I used it. The right lobe of my brain hurt and it did not subside for close to 6 hours. I also had this nauseous feeling throughout the day.”

“It made my heart race and I sweated like I had just ran a marathon,” said another customer.

Another Concern – “Plenty of User Complaints”

There are quite a few customer complaints posted on dealer websites such as Amazon. In fact, one person revealed, “My fingers started tingling then I couldn’t move them…then I had a full panic attack. I thought I was having a heart attack because I’ve never experienced something this scary happen to my body. I got driven to the emergency room and the panic attack lasted 1-2 hours.”

Another individual commented, “Not a fan. They made me feel horrible!”

According to our extensive research, if there is a certain facet of a weight-loss product or diet program that is especially burdensome (adverse effects, user complaints, bad taste) the odds of long-term success are not good. This means if Cellucor D4 Thermal Shock does in fact lead to a high number of issues, this could be a problem.

Any Real Science?

At DietSpotlight, we like to see some real science that supports the weight-loss product and its ingredients. Unfortunately we could not locate any clinical research or studies that support the claimed effects of Cellucor D4 Thermal Shock. Nothing is presented on the official website. However, we do know that Caffeine can boost metabolism and focus – so that could be where the claims come from.

The Bottom Line – Does Cellucor D4 Thermal Shock Work?

Now the moment you’ve been waiting for: our bottom line on Cellucor D4 Thermal Shock. First off, we appreciate that natural ingredients are used in this supplement and there are some customer testimonials posted on the main website. Then again, we have some concerns because it’s not supported by actual science – aside from the Caffeine. Also, we have doubts about the blend in this product, because there are clear reports of side effects.

If you’d like to get rid of more pounds, then we advise you to go with a diet product that is supported by solid clinical testing, is very affordable as well and is backed by some amazing customer reviews.

Among the best products we’ve seen in 2016 is one called Leptigen. It contains a blend of four key ingredients, which have been shown in documented clinical tests to help ignite metabolism and encourage fat loss. We have not found many complaints of harmful side effects and user comments posted on the web express people are seeing excellent results.

The makers of Leptigen are so sure about their product they’re offering a Special Trial Offer, which is a positive sign.

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About the Author:

Summer Banks is an ISSA-Certified Fitness Nutrition Specialist and has reviewed over 2000 diet products. She has years of nursing training, experience as a manager responsible for 15 supplement brands, and completed coursework on Food and Nutrition from Stanford University. full bio.

How Does Cellucor D4 Thermal Shock Compare?

Previous Cellucor D4 Thermal Shock Review (Updated September 20, 2012):

What You Should Know

Cellucor D4 Thermal Shock is a weight loss supplement that claims the ability to eliminate fat in difficult and troubled areas, suppress the appetite, increase the metabolism, burn fat, boost energy levels, and improve focus and concentration. Cellucor D4 Thermal Shock states that it is not intended for those who have not used stimulants before or for those who are sensitive to stimulants.

List of Ingredients

Embelic Myrobalan Extract, Caffeine, Octopamine HCL, Evodiamine HCL, White Willow Bark Extract, Forselex, and Passion Flower Extract are the only ingredients listed for Cellucor D4 Thermal Shock, but it is stated that there are over 70 ingredients in this product.

Product Features

Cellucor D4 Thermal Shock contains the ingredient White Willow Bark Extract which is said to aid in the release of excess body fat. Forselex is said to be able to do the same thing as White Willow Bark Extract. Passion Flower Extract is thought to possess a calming effect and work as a mild anti-inflammatory and pain reliever. The ingredient caffeine is said to help promote energy and boost the metabolism.

See Our Featured


  • Cellucor D4 Thermal Shock contains White Willow Bark Extract which is believed to be effective.
  • This product encourages exercise.


  • Cellucor D4 Thermal Shock contains caffeine so those who are sensitive should avoid this product because adverse side effects, such as, increased heart rate and elevated blood pressure may occur.
  • Those taking MAOI's, SSRI's, antidepressants, blood thinners, NSAIDS, corticosteroids or certain other medications should not take this product.
  • Those who have diabetes, hypoglycemia, high blood pressure, cardiovascular ailments or certain other medical conditions should not take Cellucor D4 Thermal Shock.
  • Women who are pregnant or nursing should not use this product.
  • Some individuals experience sleep loss. (See reader comments.)


Cellucor D4 Thermal Shock doesn't stand out from the rest of the weight loss supplements available today. Cellucor D4 Thermal Shock may not be an effective weight loss supplement because it is unclear if there are any proven fat burners or appetite suppressants in it, so those seeking a weight loss supplements, with the ability to suppress the appetite and burn fat, may want to research other products.

Cellucor D4 Thermal Shock Questions & Answers:

We condensed hundreds of user reviews about Cellucor D4 Thermal Shock in order to write this FAQ.

What are the side effects of Cellucor D4 Thermal Shock?

Cellucor D4 Thermal Shock side effects may include increased heart rate, headaches, panic attacks, tingling sensation, and nausea, according to customer reviews.

What are the ingredients in Cellucor D4 Thermal Shock?

Cellucor D4 Thermal Shock ingredients include amla fruit extract, caffeine, white willow bark extract, octopamine HCl, yohimbe bark extract, evodiamine sclareolide, passion flower extract, and n-acetyl-l-tyrosine.

Does Cellucor D4 Thermal Shock work?

Cellucor D4 Thermal Shock does contain caffeine, which is a proven stimulant that can help aid in weight-loss. However, the ingredient is only included in a proprietary blend, one that has not been scientifically tested for its ability to help you lose weight.

For a supplement with clinically tested ingredients, you may want to check out Leptigen.

How much does Cellucor D4 Thermal Shock cost?

One bottle of Cellucor D4 Thermal Shock costs $60.00, which includes 120 capsules.

How should I take Cellucor D4 Thermal Shock?

It is suggested that you take one pill of Cellucor D4 Thermal Shock in the morning and one in the afternoon. After eight weeks of use, you should discontinue consumption for at least four weeks before starting to take the supplement again. According to the label, you should not take more than four capsules in one day.

Can I take Cellucor D4 Thermal Shock if I have a health condition?

Before using any stimulant, including Cellucor D4 Thermal Shock, you should consult with your physician, especially if you are under 18 years of age, nursing, pregnant, or suffering from any health condition.

What do users like about Cellucor D4 Thermal Shock?

Customers of Cellucor D4 Thermal Shock enjoy that it contains caffeine.

What do users NOT like about Cellucor D4 Thermal Shock?

Users of Cellucor D4 Thermal Shock do not enjoy the adverse side effects that may come with consuming the product.

How do I contact the Cellucor D4 Thermal Shock customer service department?

There are many ways to contact the Cellucor D4 Thermal Shock customer service department. These include calling them at 1-866-927-9686, e-mailing them at support@cellucor.com, tweet-ing them at @Cellucor, or participating in their convenient live chat available on their website.

Is Cellucor D4 Thermal Shock vegan?

Cellucor D4 Thermal Shock is vegan.

Where can I buy Cellucor D4 Thermal Shock?

You can buy Cellucor D4 Thermal Shock on Amazon or other online vitamin shops.

Does Cellucor D4 Thermal Shock come with a guarantee?

Cellucor D4 Thermal Shock does not come with a guarantee.

Do you know of any special deals or discounts on Cellucor D4 Thermal Shock?

There are no special deals or discounts on Cellucor D4 Thermal Shock. Before giving up all together on weight-loss, though, you may want to check out Leptigen. Right now, customers are going crazy over the Special Trial Offer, available to all new customers. Click here to learn more about this product.

76 User Reviews About Cellucor D4 Thermal Shock

Leave comments below (moderated by Leptigen)
  • 1

    I’ve been using this for about a month with my new health plan and have managed to lose around 6kg in that time while still managing to head out for beers, do food tastings at nice restaurants and generally enjoy myself. This isn’t a miracle cure, it isn’t some magic weight loss pill and I am really being careful what I eat the rest of the time. The big plus of this pill is that it keeps me going with energy, seems to reduce hunger pangs and generally gives me the leg up I need to kick start my weight loss. This is heavy on the caffeine, so you do need to keep that in mind – I think i’m fairly desensitised to caffeine after years of strong black coffees, but if you experience any side effects remember that you need to drink plenty of water and try and have a bite to eat with it as well to help even you out. If in doubt see your doctor, but for me these certainly seem to be doing the trick for me and are really helping…placebo effect or not i’m losing the weight i want at a healthy rate and that can only be a good thing.


  • 2

    I just started using this product again for the second time. In 2014 I used it and dropped about 25 pounds in a month. I only used it for 1 month. It gave me the boost I needed to drop 70 pounds total in about 6 months. I did feel nauseated and clammy when I first started taking it but my body got used to it. I also added cardio and dropped unhealthy carbs for that duration. I was at around 225-230 lbs when I started and I’m a 5’10 male. When I started taking it I was very unhealthy and not loving exercise. I started using this and walking a couple miles on the treadmill. I gradually each week added time to the walking and got up to 6 miles a day then my job in a warehouse kept me moving all day long. During that 7 months I went from the 225-230 previously mentioned down to 148. My goal was 175. With all the walking the warehouse the weight kept dropping. I’ve since gained about 25-30 lbs of threat back so I’m using it again to get my energy back up and motivation to take 15 of these lbs back off. I loved this product. Nothing else has ever worked for me in the last 15 years.


  • 3

    Hi, i have a question. I have already started usind cellucor c4 ripped preworkout and would like start using also d4 thermal shock. Can i mix it together?


    Cameron (Editor)

    Alex, C4 is a preworkout and the other is a fat burner. Before taking either ask your doctor. After, if your goal is to build muscle, start with C4 and add D4 Thermal Shock later (slowly) once you know how your body likes these formulas.


  • 4
    eman gamal

    please necessary, i want to know how many caps should take in day? and when? can i take it with eating or after ?


    Adrian (Editor)

    Hi Eman. For detailed product instructions please refer to product label or the official cellucor website for more information.


    Your Name

    Before eating
    Fitst 1 and after 1 month 2 caps daily


  • 5

    Yes it is effective


  • 6

    I feel very good after taking but after one hour i feel very bad.i don’t know why .such a bad experience.before 2 years i used it was nice.pls check the quality.


  • 7

    This product is great ONLY IF you take it as instructed , it’s helped me burn fat easily in the first week , you just have to have a good diet ( not a perfect diet ) and exercise regularly , drink water , I recommend eating before taking your dosage and DO NOT take two at a time , I made that mistake and it’s not pretty


    Your Name

    can i take two caps in day? and when i take it


  • 8

    I have been taking this for nearly a week now, I started out on 2 pills a day but I’m
    Moving up to 4 as of next week , I was a huge coffee drinker so the caffeine isn’t to bad for me, I work in a kitchen so I’m always hot, but I have noticed taking this I’m feeling a lot hotter but my energy levels are going great. I have lost nearly 5kg already and I have kept my old work out schedule ( 1.5 hours Excersise bike 4 days a week) looking forward to continued positive results


  • 9

    D4 will make you nauseous if you take it on a completely empty stomach, don’t starve yourself. Eat something light that will keep it from dissolving straight into your stomach lining, like yogurt or something. Drink lots of water, and eat healthier. It contains a lot of caffeine so if you are sensitive, start with one capsule in the morning. As you become more used to it, take one in the morning and then one before your workout. You need to workout 3-4 times a week or you wont have any significant results. Also, being hot throughout the day is normal, this product is designed to help you burn more calories…


  • 10

    So your looking for the miracle pill, that you loose weight with out putting the time in to exercise? It does not exist you know.


  • 11

    what happens if i took 2 by mistake?


    Adrian (Editor)

    Hi Sharon. You might feel really jittery. If you start to feel really bad, please reach out to your doctor.


  • 12

    Would this product be effective if I took it after eating?


    Adrian (Editor)

    Hi Anna. For detailed product use instructions please refer to label or the official cellucor website for more information.


  • 13

    Idk. I’m wondering the same thing. I took my first pill today and feel REALLY bad lower abdominal pains. I feel like I’m having a miscarriage– I’m a guy…


    Adrian (Editor)

    Hello Al. If you continue to have these side effects, please consult with your physician before continuing to take cellucor.


  • 14
    Ericka Watson Gray

    it can, i felt nausea at first but i fixed it by having my morning dose at 3:00am so i could lye back down as it goes through my system. i wake up have a balanced breakfast then workout!! See if this works for you, if not i’d discontinue until consulting your physician =)


  • 15

    The pill has a lot of caffeine in it which will make u pee a lot. Its normal… to me at least


  • 16

    I am 16 years old. I have been taking d4 for about 2 days now. Two pills a day. One before school and one after. I work out daily for the past year or 2. Ive been drinking a gallon of water a day with these pills. I feel a lot of energy and I also now stay a wake at school. I have been running farther and faster. Hopefully I can loose some weight. Guess ill just wait and see.


  • 17

    I started D4 7 days ago and I lost 8lb so far. I think it’s all water weight. but still I lost weight!! So far I like them!!


  • 18

    About to start taking these tomorrow. 5’5 female 17 years 142 pounds aiming to hit 125 asap. Wish me luck. Only gonna take one a day starting out though.


  • 19

    This product is quiet a mystry… Im sure it will work but the lack of sleeping drives me nuts …. im on my second day and the apetite is going downhill


  • 20

    This only works if you eat right AND exercise. I do notice that I am going to the bathroom a lot more often and drinking lots of water but I feel pretty good. I do also notice being light headed when I take my afternoon pill but it’s nothing too bad. I’m going to start taking 4 a day tomorrow though. Makes me feel really focused while working out too. So far so good.


  • 21

    D4 thermal shock is the best fat burner in the world and it works i add effederine with it when i run and it work gr8 2gether for breathing!



    do u run for fun or marathon
    I only have problems breathing when i push myself


  • 22

    Ive been taking these for a week now, and im feeling great. Good focus, energy throughout the day. Just make sure you take your last capsule about 7 hrs before youre wanting to go to bed and youll be feeling great in no time. Love Cellucor products!


  • 23

    Its my first day on the pill. I’m 20 years old, 5″2 and 142 lbs. I eat chicken with brocolii for lunch and I work on the elliptical an hour for 5 days. Is this safe for me? What may be the side effects…I drink tons of wwater also…thanks


  • 24

    I have been on this pill now for 9days. I have lost 1lbs and have not felt any different. I eat about 2000 calories a day and exercise 4 days a week. Energy level is the same as before but it work on my appetite.I haven’t been as hungry. I will continue using it for the 30days. Post my results



    So u eat 2000 calories a day? How much you burn a day? Make sure if u burn 200 calories at gym a day, u should eat less then 200 calories a day then u will b able to loose weight. If u eat more less then u burn then u doing nothing.


  • 25

    I’ve been taking this product for a few days now. Today I’ve been feeling really sick but I also got a bad cold. I’m still going to keep taking it to see if it goes away.


    Adrian (Editor)

    Hi Thea. If you continue to have these side effects, please consult with your physician before continuing to take cellucor.


  • 26

    Today was my first day taking one pill por day and my heart was going crazy and the last 3 hrs I felt nauseus … I’m trying to go to my healty weigth I’m 60 pounds over … How can I make the naseus efect go away?? Sombody plz replay



    Patty, eat something small about a half hour after taking it. You want it to have an empty stomach to work on in order to have the full effect, but a half hour later put something on your stomach to let it settle.


  • 27

    I sure hope not, I’m on day 1 and I am also on Depoprovera.


  • 28

    Great Product! Im am well on my way to my goal!


  • 29

    I started off using to capsules at 7 am before I head out..about an hr later I’m hungry..this is my second day…I will try taking 2 more around 12/lunch..if I still feel nothing I’m taking it back..not as strong as I thought nor need it to be..just makes u use the bathroom alot..


  • 30

    Girls use back up…a friend & I started our diet & D4 & occasional C4 & we are both prego & were on 2 diff BC pills…trinessa & reclipsen…im sure this decreases the effectiveness some how like any possible drug interaction…this also happened to the sales mans wife at the nutrition store who sold us D4…weve been researching this & because woman are new to these products we wanna make sure there is a warning on the bottle…we want nice toned bodies not babies from the product..but please remember children are a blessing…& things happen for a reason.. 🙂


  • 31

    Does anyone experience night sweats with D4 Thermal? I’ve read that some people experience excessive sweating, but that isn’t an issue for me during the day, only at night. I have recently moved and changed jobs and I’m not sure whether to associate the night sweats with the supplement or other factors. However, even on days when I don’t take D4 I still experience night sweats.


  • 32

    my daughter is 16 and weighs 168. is 5’7″/ I am wondering if she can take D4 one tablet if I monitor her 24 hours a day for 5 days first.



    I’m not a doctor but I would try giving her less than one pill if you are concerned. Maybe start with 1/4 or 1/2 a pill vs. giving her a whole one and worrying about it.



    your daught is 16>>>you are insane if you think it is a good idea to give a 16 year a weight loss supplement. start mointoring her diet and encourage exercise> this is nto a magic pill and 16 is way too young to take any dietry supplements.



    i agree



    Fully Agree!!!, this mom it’s insane, instead of try to cook good food to your daughter, and do some exercise, my GOD



    I also agree! She’s to young!!!


  • 33

    I tried cellucor D4 Thermal Shock, and the results were phenomenal. But ofcourse you are ludacris to think that you will just loose weight by taking the pill and laying around. I took D4 while following a strict high protein, low carb diet. and I did alot of High Intensity Interval Training such as sprints, staidums, ladders (they burn 3x more fat than conventional cardio). On June 9th I was 243 lbs, and on august 1st I weighed in at 208. Be strict with your diet, and just sacrifice for a little bit and you will have extraordinary results, I promise. Remember stay away from excessive carbs, limit yourself.


    Your Name

    How many Carbs did you eat in a day (gms)


  • 34

    I started taking this about 3 weeks ago and I have yet to stop feeling nautious (to the point where it is unbearable) and I only take one a day. I sweat profusely and feel like I’m constantly in a bad mood :(.


  • 35

    Still doesn’t compare to Adipex…I am on week 2 and can’t really get the appetite under control. I’ve tried different times of day and drinking lots of water. Oh well, still plugging along waiting for the energy boost and loss of appetite.



    have some discipline in your body and stay away from the crappy foods. who depends on a pill to take away your cravings for bad food? someone lazy, thats who.


  • 36

    Hell yeah! I just started taking D4 and i must say that i’m a believer. One of these bad boys n the morning with a stout cup of coffee and i’m good all day. Oh, and can’t forget to drink lots of water throughout the day. Explosive energy and decreased appetite, totaly focused! What else could u ask for? Hell, u might could go as far to say that this is as close to legal METH as u could get……..got my vote


  • 37

    ive tried everything like slimquick, lipo6, green tea, xzenadrine, alli, hydroxycut, and a few others and none of them ever worked.. i just started taking D4 and we shall see how this works! so far i feel really energized and great! i want to either clean like crazy or go on a walk!


  • 38



  • 39

    I just started with this, and have a fairly high tolerance to caffiene. I haven’t noticed much in the line of weight loss, but I’m also a heavy lifter and try to pack on the carbs and protein, so weight loss would be difficult. I really only started taking this for increased energy, and it seems to be pretty good for that by just taking one pill in the morning and one at lunch.

    One side note – I can’t say whether or not this is true, but women on birth control may want to consult a physician before taking this. I have seen an oddly high number of comments on other sites about D4 negatively affecting birth control, which resulted in many unexpected pregnancies.



    Dave, your comment was helpful.


  • 40

    I reccomend this product to anyone who works out, and is looking to lower their body fat.

    I’ve only been taking it for a week (currently on 4 pills a day) and I LOVE it. It supresses my appetite, i’m only eating 1800 calories per day AT MOST.

    Also, I’ve been working out hard twice a day, not including light physical activites in between. It makes me feel great, and motivated.

    on the down side…I have experienced slight sleeplessness and chest pain while on it. Do not take this with anything else. Do not take on an empty stomach, and drink more water than you usually do. Also, make sure you take your last dose of the day AT LEAST 6 hours before you intend to go to bed, prefferably even 8 hours.


  • 41
    jared gex

    I been on it for 2 days and i like it i started a diet 8 days ago with white flaky fish chicken and vegeis and lots of water and i am working out every day. I lost 15lb in 8 days about to take another and go to my athletic club and stump a mud hole in a good work out



    Let me know how you’re losing the weight!


  • 42

    I guess being that I come from taking the original xenadrine this is like childs play to me. I only experience sweats if I exert myself but this product does give a energy boost but all these other symptoms mentioned here I don’t get. Maybe you all should look at the time frame you are taking this pill. I mean, if you are taking a dose between 3-5pm then yes you should be up late at night as its like drinking 5 cups of coffee at that time frame.
    Also, look at what other things you are doing such as are you drinking cafeine liquids all day along with taking this pill? are you taking other pills with cafeine along with taking this pill? Alot of factors come into play so consider that before you take a pill for one day and act like your world is coming to a end. I have taken this for a few months and its the normal reaction thats less then what the old xenadrine did for me but its a good start for a energy/diet pill. I originally was skpetical but this pill does back up its claim to give energy which we all need to get in that extra mile or rep that we normally would skip.



    a few months? strictly speaking, this stuff is NOT good for your body. you really should not take it contiually for more than 8 weeks, and then take at least 6 weeks off before starting again.



    Yes I too agree Colin. You should only take this product as it directed and plus it says clearly on the label. You can’t take this thing for months. With all its benefits it has side effects as well.



    8 weeks = 2 months which is the same as a few months.. chill



    A few is three idiot. A couple=2=8 weeks…moron


  • 43

    Hey, I have to say that I’ve been on this for 5 days and at first I had trouble sleeping. now I sleep well and I love the energy that it provides. I’m not checking my weight until the full 8 weeks I’m soooooo excited:)) Good luck everybody with your results


  • 44

    I’m a little concerned, this is my first day taking it,I took one pill this morning, I chose not to work out due to I didn’t know D4 would affect me…is it normal for my legs to go numb when I sit down for more that 5 minutes? This is not usual for me….is it just the energy boost saying i need to get up and move or what?


    Adrian (Editor)

    Hello Jennifer. If you continue to have these side effects, please consult with your physician before continuing to take cellucor.



    No, not normal for your legs to go numb, or at least mine haven’t. I’m taking d4 thermal shock and t7, my legs haven’t gone numb.



    I had to stop taking it because it made my arms go numb.(i was using t7 and d4) listen to your body.. if it doesnt feel right then stop. everyone is unique, what works for one person may not work for another.



    D4 made my arms and face go numb i would recommend you stop taking it… I am i was going to to shock because it was making me freak out



    With your blood vessels constricted while sitting and the constriction and increase bp that may happen..may want to discontinue..i am taking it with little neg side effects for about a week


  • 45
    concerned husband#1

    My wife is bouncing off the walls. She complains of a restlessness that stretching, or excercise will not alleviate.


  • 46
    jared Kozak

    I got this stuff about a week ago and i love it. I have lost something like four pounds. it is by no means a magic pill but it does work if you work out while on it.

    I would say follow the instructions for the first dose if you dont know how you will be affected. I just had a little trouble falling asleep the first few nights but now im fine. Also make sure to DRINK LOTS OF WATER you cant drink too much.



    i love this stuff. i never feel hungry, i have to tell my self to eat. but yes drink it with a glass of milk or piece of toast if your sensitive. lots of energy and on day4 lost 3lbs


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