Updated: 01/12/2018

Sometimes you need a boost to get you over that weight-loss hurdle. So, what about Cellucor D4 Thermal Shock? Let’s find out by looking closely at the ingredients, side effects, and scientific research. Additionally, we examined numerous dieter comments, addressing their concerns. Finally, we gathered the info to give you the info you need.

Cellucor D4 Thermal Shock Readers: Click here to find out why we're giving away samples of our product, Burn HD.

What is Cellucor D4 Thermal Shock?

Firstly, Cellucor D4 Thermal Shock is 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, sold through trusted online retailers, hit the market about 2010. The company behind Cellucor D4 started operations in 2002. We like the promising ingredients and positive reviews. Does it work? Read on…

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Cellucor D4 Thermal Shock Side Effects – “Positive”

The first issue tackled was Cellucor D4 Thermal Shock side effects. “It’s promising to see an ingredient blend containing extracts backed by research,” said our Research Editor. “We took a closer look at the results.”

One user stated, “This pills work great. Less of an appetite while taking these plus gives a boost because of the caffeine.”

“Gives you a nice amount of energy and suppresses appetite ,” said another customer.

We found more customers raving about the results.

“If you actually go to the gym and work out it definitely is a good supplement,” stated a user.

“One of the best fat burners,” reported another.

User Reviews – “Offering Support”

We learned what users thought of Cellucor D4 Thermal Shock by reading hundreds of verified reviews. “This is a wonderful product that suppresses appetite and gives crazy amounts of energy,” commented a customer.

Another commented, “I do get lots of energy though when I’m working out or doing some other activity.”

Was there additional reviews of Cellucor D4 showing results? We found them.

“Stacked with T7 Extreme for about 6 weeks and lost 9 lbs,” stated a user.

“I find this gives me the energy, and takes away cravings,” said a dieter.

According to our extensive research, user reviews directly affect long-term success. There are benefits when users have great things to say about Cellucor D4 Thermal Shock.

The Science – “Researched”

Cellucor D4 is no longer available on the official website, but we still found research supporting the ingredients. There’s research showing caffeine boosts metabolic rate, and the effects of white willow bark are similar to aspirin. It appears as if Cellucor D4 Thermal Shock attempts to recreate the ECA stack, which helped countless users lose weight.

What Users Are Saying

"”I was skeptical at how well this would work but after using for two months now, I can safely say that these pills give me plenty of steady energy for about a six hour period. I work 12-hour shifts, take two per day and these help get me through, whereas before I would just drag through my day. I definitely recommend! They also help curb my appetite and I’ve seen a slimming of my waist with enough exercise and a good diet.”"

"”These pills made me so jittery it was crazy. It was only for the first few days but after that, I guess your body gets used to it. It’s not a good feeling though. I didn’t notice much difference in weight loss.”"

"”Don’t buy this. It makes you have to go to the bathroom every ten minutes.”"

The Bottom Line – Does Cellucor D4 Thermal Shock Work?

Will Cellucor D4 Thermal Shock jump-start your weight loss journey. There’s a chance, when you look at the ingredients and positive user reviews. We found research backing the blend and studies showing it works. The only concern related to a few users not noticing results, but that’s few and far between.

You can lose weight with the proper diet, exercise and supplementation. Another one catching fire is a supplement containing ingredients backed by research and positive reviews.

Among the best products we’ve seen this year is one called Dietspotlight Burn. It contains a blend of four key ingredients; clinically-tested and shown to help ignite metabolism, curb appetite, and ignite fat loss. User reviews show people see excellent results.

Also, the makers of Dietspotlight Burn offer customers a Special Trial Offer, which is a positive sign.

Learn More About Burn HD »
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Cellucor D4 Thermal Shock

What are the side effects of Cellucor D4 Thermal Shock?

Cellucor D4 Thermal Shock side effects, based on user reviews, are mild.

What are the ingredients in Cellucor D4 Thermal Shock?

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

How do I know if Cellucor D4 Thermal Shock is right for me?

Choosing the right product is the #1 question asked by DietSpotlight readers. We recommend trying any product before buying it and know that finding a product with a sample offer is near impossible - so we created our own product, Burn HD, with scientifically backed ingredients.

Click here to get your sample of our powerful fat burner today.

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. It also contains white willow bark, which has properties similar to aspirin.

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.

Is Cellucor D4 Thermal Shock vegan?

Cellucor D4 Thermal Shock is vegan.

Does Cellucor D4 Thermal Shock come with a guarantee?

Cellucor D4 Thermal Shock does not come with a guarantee.

One supplement that does come with a guarantee is Dietspotlight Burn, which contains clinically researched ingredients.


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

Amla fruit extract, caffeine, white willow bark extract, octopamine HCl, yohimbe bark extract, evodiamine sclareolide, passion flower extract, and n-acetyl-l-tyrosine

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.


  • 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 pay close attention to the effects caused.


Cellucor D4 Thermal Shock stands out from the rest of the weight loss supplements available today. Cellucor D4 Thermal Shock is an effective weight loss supplement because there are 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 consider this one.

Summer Banks Dietspotlight Author
About the Author:

Summer Banks, Director of Content at Dietspotlight, has researched over 5000 weight-loss programs, pills, shakes and diet plans. Previously, she managed 15 supplement brands, worked with doctors specializing in weight loss and completed coursework in nutrition at Stanford University. full bio.

49 Cellucor D4 Thermal Shock Reviews

  • Alex (Verified User)

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

    • Maribel (Editor)

      Hi Alex! Because of possible interactions with other products, please make sure to consult with your physician before taking this product.

  • I monitor her 24 hours

    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.

    • Maribel (Editor)

      Hello. This product is to be only used by adults 18 years and older.

  • Armani

    Does anyone know where to buy D 4 ? It is discontinued. What should I replace it with?

    • Anna (Editor)

      Hi! Unfortunately this product is no longer available for purchase. Have you researched other fat burners? Make sure to check out Dietspotlight Burn!

  • Mark

    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.

  •  Started using this SECOND TIME !
    Chris (Verified User)

    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.

  • How many Caps take in Day
    eman gamal

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

    • Your Name

      Before eating
      Fitst 1 and after 1 month 2 caps daily

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

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

  •  Caffeine on pills
    Kaitlyn (Verified User)

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

    • Victoria (Editor)

      Hi Kaitlyn, have you ever looked into caffeine-free products? You should check out Dietspotlight Burn

  •  This product is great
    Alma (Verified User)

    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

    • Your Name

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

  • Excellent for Weight Loss
    Ashlyn (Verified User)

    I went from 319 to 258 while on these in a matter of 3 months. They are amazing. I used MyFitnessPal to track my calorie intake and stayed under 1200, which was easy because the appetite suppressant in these had me satisfied with literally bites of food. I did no extra specific exercise however I was up moving more often due to the energy boost. However they are discontinued. I havent found anything quite the same since 😞

  • Ash

    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

  •  I feel very good after taking Cellucor.
    narendra (Verified User)

    I feel very good after taking

  •  Hope to lose weights
    Kaitlyn (Verified User)

    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.

  •  Lost the water weight
    Roz (Verified User)

    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!!

  • Hoping this would work

    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.

  •  I am experiencing some side effects
    rahonovis (Verified User)

    Im on my second day and the apetite is going downhill

  • Shay

    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.

  •  So far so good
    shannon (Verified User)

    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’m going to start taking 4 a day tomorrow though. Makes me feel really focused while working out too. So far so good.

  •  Best fat burner in the world!
    chanda (Verified User)

    D4 thermal shock is the best fat burner in the world and it works.

    • angel

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

  •  Feel great and love it
    Chris (Verified User)

    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!

  •  Don't feel hungry and will still continue
    Carlos (Verified User)

    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

  •  Product is doing great
    Dutches (Verified User)

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

  •  you will have extraordinary results
    Dave (Verified User)

    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)

  •   Energy

    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.

  •  I'm a believer
    Murdoc (Verified User)

    Heck 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, totally focused! What else could u ask for?

  •  i feel really energized and great
    Bri (Verified User)

    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!

  • Dave

    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.

    • Weiss

      Dave, your comment was helpful.

  • Colin

    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.

  •   I lost 15lb in 8 days with its usage.
    jared gex (Verified User)

    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

    • jen

      Let me know how you’re losing the weight!

  •  This pills gives us energy.
    lonnie (Verified User)

    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.

    • Chi-Man

      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.

  •  Good luck everybody with your results
    Honeylove (Verified User)

    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

  • Cellucor D4 Thermal Shock effects on health
    Jennifer1983 (Verified User)

    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.

    • Felicia

      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.

    • ivy101

      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.

  • My wife complains restlessness that stretching
    concerned husband#1 (Verified User)

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

  •  I have lost something like four pounds
    jared Kozak (Verified User)

    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.

    • tinareno

      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