Cool New Research On Cold Thermogenesis.

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If you read “A Day In The Life Of The Ultimate Fat Burning Weapon Inventor“, then you may be familiar with this guy named Eric Grove. One could say that Eric is mildly obsessed with the use of cold exposure to burn massive amounts of calories and in that fat burning weapon article, Eric describes a vest he invented call the “Cool Fat Burner” vest, then goes on to describe in great detail the results of his groundbreaking indirect calorimetry experiment, which shows that high intensity cold stress can boost your metabolism by over 300%.

Since then, Eric has also shown that wearing a Cool Fat Burner vest can boost adiponectin (a protein involved in regulating glucose levels as well as fatty acid breakdown) by 60%, and keep brown fat active for hours after removing the cooling vest. I also reported on the impressive research behind body cooling gear in my own article at T-Nation entitled “Cold Temps For A Hot Body“.

So how does this vest work, exactly?

You simply place the vest (which is filled with cold packs) over your shoulders, where your body carries the majority of your rapid calorie burning brown adipose tissue, and then you just sit there.

So anyways, you may be scratching your head, you may think all this is woo-woo, you may already know about “cold thermogenesis” but you’re not quite sure how practically to do it, you don't like getting wet in cold showers or jumping into frigid lakes, or you may simply want an easy way to nudge any extra holiday calories off your waistline and instead use them to generate pure, clean body heat.

Either way, keep reading, because Eric is today’s guest author, and he’s going to give you a glimpse inside the nefarious, shivering mind of the ultimate fat burning weapon inventor, and a very interesting group experiment he just conducted on the Cool Fat Burner combined with the newest addition to his line-up: the Cool Gut Buster…*

…specifically, you're going to learn about recent randomized group experiment that once again confirms the ability of the cold thermogenesis “gear” to cause a huge boost to metabolism and calorie burning, as well as positively effect hormones related to health and longevity.

*There is special a discount coupon code on any of the Cool Fat Burner products for the 2016 holiday season at the bottom of this article.

A Cold Thermogenesis Refresher

Cold thermogenesis is the practice of intentionally exposing parts of the body to specific levels of cold stress. Years of research now shows this can cause significant increases in metabolism and calorie burning, can increase insulin sensitivity and help control blood glucose levels, reduce systemic inflammation, help with sleep and recovery, and potentially fight certain types of cancer as well as promote overall longevity.

How can cold thermogenesis do all this?  

Think about it this way: human beings are probably not meant to be in environments constantly at 70 degrees Fahrenheit, our average modern temperature in which we live, work, play and exercise.  Constant temperature control is a modern, technological contrivance. Whether it was an asteroid that blocked out the sun and wiped out the dinosaurs, to reports of a flood that left the planet underwater, our ancestors at some point experienced a dark, cold world, some form of an ice age, and a very likely necessity to evolve and even thrive in cold temperatures.  Some researchers have even correlated the increase and control of indoor heating to the rise in obesity (and yes, you must keep in mind, correlations should be taken with a grain of salt)

The point here is that we’re arguably not meant to be at a constant, comfortable temperature, and that true, optimal health requires at least occasional cold thermogenesis practices.

The Problem With Cold Thermogenesis

The problem with cold thermogenesis is that most people will not stick to ice baths as a regular practice, cold showers only last for a few minutes, and simply having a cooler room, office or house has little significant impact on metabolism.

That's why I'm a fan of making long-term, habitual cold thermogenesis quick, easy, and hassle-free, and that's why I've run a series of independent third party experiments showing the following:

Metabolic Boost & Calorie Burning Effect

There was the original groundbreaking indirect calorimetry experiment, where CFB inventor Eric Grove was shown to reach a 300% boost to metabolism, burning 500 calories in two hours, tested at the University of CA, San Diego.  This had never been done before, not in this manner, nor recorded for all to see. Check out the video below.

Activation of Brown Fat

Then there was the unprecedented PET scan experiment – showing “brown adipose tissue” (BAT) activity from the Cool Fat Burner:

  1. BAT still active for hours after removing the vest, in a 70’F room
  2. High BAT levels even at the end of summer; most people otherwise lose their BAT during summer
  3. High intensity cold thermogenesis does not turn off BAT, contrary to what others had claimed

Remember – brown fat or “brown adipose tissue” (BAT) is good.  It’s a metabolically active fat. BAT is found around major vessels so that it can help to heat the blood.  BAT turns on and burns calories when you get cold.  If a person is subjected to cold on a regular basis, they will increase their levels of brown fat.  BAT is also inversely correlated to obesity, meaning the fatter you are, the less BAT you tend to have.  Most mammals have high amounts of BAT to keep them warm. For example, farmers know that cold exposure is a major factor in animals losing weight, so they have to increase their feed over winter to keep their weight up.

BAT doesn’t store calories, it burns them.  Human babies are born with plenty of BAT to help keep them warm, but humans tend to lose our brown fat as we get older.  Seasonal workers have been shown to have increased BAT levels during the winter, but then lose that brown fat as summer rolls around.

Now compare this energy-burning BAT to regular subcutaneous white adipose tissue, which is what most people typically think of as fat (the fat on their stomachs, hips, and legs) that stores calories and is the result of obesity and related to metabolic disorder and all manner of disease.

So brown fat, or BAT, burns calories and is good.  Regular white fat (white adipose tissue, or WAT) that makes up the subcutaneous fat is not completely bad, but can be bad, especially when it grows to the point that one becomes obese. Interestingly, brown fat can burn white fat when we get cold.  Thus it can help with weight loss.

The image of the Cool Fat Burner vest below shows how the vest covers major areas of BAT on the upper body.*


*Note: researchers have recently identified “beige” fat, which starts out as regular white fat, but that is somewhat converted to have properties of brown fat, meaning that it can burn more calories than regular white fat.  So there is white fat, beige fat, and full brown fat. Beige has properties of both. Why is this important? The hormone irisin, released during high intensity cold thermogenesis, is involved in the browning of white fat.  Merely holding cold packs against the skin above the fat can alter the white fat underneath the packs, causing the white fat to transform into beige fat, and causing your body to burn far more calories than usual.

Increased Insulin Sensitivity

We’d also seen that the Cool Fat Burner could massively increase insulin sensitivity, drastically lowering blood glucose levels in a manner comparable to running, and this is after a single session of wearing the vet.  Keep in mind that chronically elevated blood glucose levels are tied to diabetes, heart disease, metabolic syndrome, and obesity in general.  Anything that can help lower and control blood glucose levels can probably help combat those disorders.

Spot Reduction of Stomach Fat

While not endorsed for this use, we even showed that the Cool Gut Buster could replicate the conditions necessary to induce fat cell apoptosis, allowing for the spot-reduction of stomach fat, similar to the expensive surgical process of “cool sculpting”. Currently, targeted cold exposure is the only known way to significantly spot reduce fat.

Apoptosis is the intentional, programmed death of a cell.  It happens all the time in the body when a cell is supposed to die and be replaced by another newer cell.  It has been shown that when the skin is held at a specific cold temperature that apoptosis occurs in the fat cells underneath.  But unlike fat loss from exercise (in which fat cells shrink or are replaced), when those fat cells are gone, they are not automatically replaced.  They’re gone for good (admittedly, if a person undergoes a period of over-eating, they could theoretically create new fat cells over time.)

Increased Adiponectin

As you can see in the video below, we have also demonstrated a 60% boost to the hormone adiponectin after a 2 hour CFB & CGB session.

Adiponectin is being studied for its role in insulin sensitivity and diabetes, cardiovascular and heart health, its ability to kill certain types of cancer, and its role in longevity.


The Synergistic Effect

Once you put all these biochemical variables that occur as response to cold thermogenesis, you experience the same type of synergistic fat-burning effect I demonstrate in the video below*:

*The full plan I use for this video can be found at, and is free to all CoolFatBurner vest owners.

A Few Practical Ways To Make Cold Thermogenesis Pleasant

But wait…isn’t cold thermogenesis unpleasant?  

Don't most folks hate teeth-chattering, skin-burning cold?

No, and there are several reasons why.

First, when you do cold thermogenesis properly, only your torso (where all that BAT is) needs to be cold.  You can keep your fingers, toes, ears, and nose warm.  Since these areas have a high percentage of cold-sensors, you can make yourself feel warm by keeping them warm.  Ever get too hot lying in bed, then you stick your feet out from under the covers, and it cools you off?  That’s the same concept, in reverse.

So keeping your fingers, toes, ears, and nose warm makes you feel warm, even as your torso is cooling.

Second, wearing gear that has ice packs in it allows you to move around or engage in other activities while you wear it. Television, typing at the computer, working around the house, whatever.  I’ve had quite a few users report back that they wear their vests in their morning driving commutes to work.


Third, there is the obvious phenomenon of “cold adaptation.” As your physiology transforms, you get more efficient at cold thermogenesis.  You’ll be comfortable at temperatures that you used to feel cold in, and be burning far more calories per session than you used to. Cold temps often won't even cause goosebumps in a cold-adapted person.  They’re burning so many calories, they’re like an efficient heat-generating human furnace.

The Randomized University Group Experiment

So up to this point, all Cool Fat Burner experiments have been done on a few individuals.  This newest experiment was to be the first time ever that a cooling vest was tested in this manner on both metabolic calorie burning and also on the hormonal response of cold thermogenesis.

Let's delve into what we planned to study.

There would be 16 subjects, 8 male, 8 female. All subjects were non-smokers with a BMI between 25-35kg/m2 and confirmed to be classified as overweight. None were cold adapted and none had experience with cold exposure. All testing was done in the mornings, in a fasted state, and the subjects would wear the Cool Fat Burner and Cool Gut Buster for 90 minutes total.

The first 30 minutes would be at low intensity cold thermogenesis (CT), meaning not approaching shivering.  The last 60 minutes would be higher intensity CT, approaching or even entering shivering level intensity. Subjects were allowed to drink ice water between the low and higher intensity portions, to help push up the CT intensity.

Blood samples would be taken before putting on the cooling vests, then again at the 30 minute mark (between low and higher intensity cold thermogenesis) and again at the end, after the 60 minutes of high intensity CT, thus yielding 3 total blood samples per subject.  Indirect calorimetry would be used on the subjects to monitor calorie burning and metabolic boost. The blood samples would each be tested in triplicate (3 tests per each blood draw, then take the average), for each of adiponectin and irisin.  This gives 9 total tests per each of the two hormones per the 16 subjects.


So what happened?

All subjects experienced a small metabolic boost during non-shivering thermogenesis, and around a 200% boost during higher intensity cold thermogenesis.   That level would yield nearly 300 calories burned in a two hours session at their average body composition!

However, this 200% boost is lower than the previous tests we've run, which have shown a 280% and a 300% boost in earlier subjects. So the subjects did not go to as high an intensity as previous trials on the Cool Fat Burner.  There are several possible reasons why this could be:

  1. The subjects simply didn’t try to go as hard with cold thermogenesis because they weren’t as motivated as previous experiments with cold-adapted individuals.
  2. Since subjects were new, unpracticed, and not yet cold-adapted, it’s established that more experience with cold thermogenesis would allow them to reach higher calorie burning numbers
  3. The subjects carried much more white fat than previous subjects and their fat may have acted as “insulation” against the cold.

In this respect, I suppose using cold thermogenesis as a fat loss strategy can be likened to going to the gym. If you’re overweight, out of shape, and are going to the gym or to exercise for the very first time, your workout will not yet be very productive when it comes to actually increasing fitness parameters like lactate threshold or maximum oxygen utilization. But as you put in the time exercising, building muscle, losing fat, increasing conditioning and even simply learning how to properly do the exercises, your workouts can get better and more productive and yield better results over time when it comes to increasing fitness.

Thus a new, overweight and out-of-shape person should not judge exercise based off their first workout, and this concept is exactly the same for cold thermogenesis.

If someone starts out overweight and carrying some fat, it may be tricky to induce the highest intensity levels on the very first cold thermogenesis session. Like all things, cold training takes practice.  One has to learn about their own tolerance levels, slowly increase cold adaptation and build up brown fat, learn how to relax during sessions, and so on.  As they lose fat (and ideally, build muscle) it gets easier to get better results during sessions.

Let's now take a look at what happened not just to calorie burn in these subjects, but also to fatty acid and blood sugar regulating adiponectin levels.

Half the subjects saw around a 10% boost in adiponectin levels from the beginning to the end of the session.  The other half saw minimal changes.  Compare this to a previous study that showed that after 10 weeks of a lycopene-rich diet (tomatoes), women subjects saw a 9% increase.

So the Cool Fat Burner reproduced in 90 minutes what it took those other subjects 9 weeks to do.

It’s been shown over the last few years that adiponectin levels can vary for different demographics and populations.  Not everyone starts at the same levels, nor responds to activities such as diet, exercise, and cold thermogenesis in the same way. For example, a recent published study showed that when testing children, different ethnicities have different adiponectin levels, and those levels can often predict how well they will respond to diabetes treatments (remember, adiponectin is involved in – amongst other things – insulin sensitivity and metabolism).

Also, bear in mind that adiponectin is inversely related to obesity, meaning that the more obese you are, the lower your adiponectin levels tend to be.  So already half of the subjects (all of which were already classified as overweight) saw an increase during the session, and it is reasonable to assume as they lose weight and get in shape, their adiponectin levels will increase across the board for all subjects.

Next there's irisin, which can help with the “browning” of white fat, can help build muscle, can probably kill certain types of cancer, and may promote longevity.  Unfortunately, the irisin results were problematic.  One third of the subjects saw increases, but others did not.  But the problem here is certainly due to the testing method.

During the initial stages of our experiment setup, a controversy arose over the testing accuracy of irisin.  Some critics were saying all testing methods were flawed, and doubted humans could even produce the irisin hormone.  The debate went back and forth, and eventually they used “mass spectrometry” to prove that humans do in fact product irisin.  However, it was then acknowledged that many of the methods used to test irisin may be flawed and inaccurate.

So at the last minute, we changed testing methods, and used one that was supposed to be “up to date” with the new findings.  However the lab reported to us that the first testing kit was not working right, so none of the findings were valid.  They purchased several more kits, and re-tested everything and those were the results we were eventually given.

Then another problem was revealed with the irisin testing. It has been postulated that freezing blood samples can damage the irisin in the sample.  What’s more, the longer it stays frozen, the lower the irisin scores.  All of our samples were frozen, and most were frozen for months and months before testing even began!

So at this point, I’m not real confident about the irisin results.  The reality is that all subjects surely had an increase in irisin, and all were larger than the tests showed.

But we already know high intensity cold exposure can increase irisin.  For example, a mere 15 minutes at high intensity cold thermogenesis (shivering) increases irisin as much as an hour of HIIT (high intensity interval training) exercise.  However as mentioned above, in regards to the metabolic boost and calorie burning, there’s a good chance the test subjects simply weren’t motivated to reach a higher level of intensity (evidenced by their huge, but still lower overall metabolic boost).  That may also have contributed to lower irisin levels, which is released during high intensity exercise and cold thermogenesis.


So that’s it folks!  Despite handicapping ourselves with a few of the tests, we still got great results. Huge calorie burning, an extremely significant hormonal response, and proof that yet again the Cool Fat Burner can work as well (but with more convenience) as jumping into an icy cold lake or taking a very long cold shower.

And please bear in mind that this test was performed on a randomized group of slightly obese subjects in a tightly controlled university exercise lab.  This is just further proof of the benefits of the Cool Fat Burner and cold thermogenesis!

In celebration of these test results, I am giving any Ben Greenfield Fitness reader a 12% Cool Fat Burner discount code on the vest or the gut burner (or you can get both). It's good until New Year's Day 2017, so it's perfect timing for buying a Christmas gift or simply giving yourself the ability to decimate holiday fat fast.

The code is Ben12CFB and you can click here to use it now. As I mentioned earlier, you'll also get full access to my Cool Fat Burner guide download along with your cold thermogenesis gear. Happy holidays, and leave your questions, comments and feedback below.

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51 thoughts on “Cool New Research On Cold Thermogenesis.

  1. Raphael says:

    Hi Ben.
    I do not have Diabetes. However, I’m afraid it may cause very low blood sugar, thus leading to Hypoglycemic and Brain Damage. The inventor of this Vest has a clip showing his blood sugar to be 66 mg/dl. The healthy range is between 110-70 mg/DL.
    Please shed some light on my fear of Hypoglycemic and Brain damage.

    Best Regards,

  2. Alex says:

    Are there any distributors for CFB in Europe?

  3. James Martin says:

    Could it be used to reduce our belly fat – please let me know

  4. George tsiliras says:


    i leave in europe ana icaideeliver outs dnt buy fat burner vest since covid-19 the company not deliver outside usa

    is there any good alternative .thank you

    1. Hi George! You can wear the Pure Fitness Weighted Vest during your exercise to build extra strength quickly, to make body weight workouts harder, to add extra resistance during uphill hikes or runs, or simply wear during the day under your clothes to burn extra calories! You can choose between 20 and 40 pounds and all the vests are fully adjustable by adding/removing weights:

  5. Alvin Dizer says:

    Hey, thanks for the tips, we all should apply it now, thanks again dude!

  6. Ben L says:

    I’m wearing the cool fat burner currently, and regularly wear it while working. I live in Sarnia, Ontario, Canada, right at the mouth of the St Clair River from Lake Huron. I started using the vest and cool gut buster starting September 2020 to become quite cold adapted, often wearing it for 2-3 hours. The vest allowed me to go without a coat the entire fall, winter and spring season (other than 5 days where I had mild cold symptoms where I wore a sweater.) I was able to do swims from the lake down the river to the Bluewater Bridges for between 12 – 20 minutes fairly comfortably in 2.5 – 7 degree C water in just a bathing suit. In terms of cold adaptation, I think its a great device, my only wish is for the ice packs to be more durable; I feel I’ve been careful with them but had several rupture. I’ve since duct taped them all while completely dry and at room temperature and have had zero ruptures since which is great. I love the cold and this give a deep cooling feeling that I crave. On a hot day, I ended up moving a ton of soil wearing the vest and it kept me perfectly cool and refreshed. I’m looking forward to cold training throughout the summer and seeing how much easier my cold adaptation will be this fall and wintertime 2021.

    1. Eric CFB says:

      Nice work, Ben! Sounds like you had some solid cold-adaptation going on! Probably some serious calorie burning too.

      Also wee have a minimum 1 Year Warranty, please email us for replacements if need be! (CoolFatBurner AT gmail DOT com)

      1. BL says:

        Awesome, thanks Eric. I did a 45 minute swim (and other short ones) in 7.5 Celsius / 45.5 F water over the weekend in Tobermory, Ontario (notable for shipwrecks and its cold cold water). I jump in the water and after about 2 minutes I feel an internal heat switch turn on full power, and its just a feeling of pure energy and bliss from there. Cold adaptation really is an amazing thing, and the vest has made it effortless. Also it was pretty funny being the only person I saw swimming the whole weekend. :)

  7. inam ul haq says:

    Thanks, mate, these really helped me understanding these problems, quality Article.

  8. Ross says:

    Ben are there any follow ups, case studies, etc for this equipment and with Eric?

    1. Eric G says:

      Hey Ross, this experiment has been published in “The Journal of Sports Medicine and Physical Fitness!”

      We are engaged in more experiments in 2020 involving using the Gut Buster for “Do it yourself coolsculpting,” and Mount Sinai is supposed to be setting up experiments involving the Cool Fat Burner’s effects on blood glucose levels.

  9. melanie petschulat says:

    Hi do you have a current coupon code for the cool fat burner…just ordered aminos and Kion leasn first time today.

  10. Danny Blumenfeld says:

    Hi guys..I”M SELLING MINE…I purchased the Cool Fat Burner AND Gut Buster combo (size MEDIUM). Tried it for about a month (maybe 6-8 times) and decided I would not be able to keep up the process. My pkg included BOTH vests, 4 extra soft-packs (though one busted so I have 3 extras now).

    Totals with discount was $157.99 plus $19 shipping. (Total $176.99). Like new condition.Comes in USPS FLAT RATE box the same way they shipped it to me Selling for $111.00 with shipping (19.00)

    TOTAL $130.00) if anyone wants to try it. please contact me at [email protected] if interested.. thx

    1. Danny Blumenfeld says:

      UPDATE 8/31/19 HI all. I was able to sell my CFB package . I’m not sure how to remove the post. Thx all who inquired.

  11. Sarah says:

    Is there still a discount code for the vest? I’ve tried the one mentioned in a few podcast episodes, but it no longer works..

    1. BEN10CFB should work for 10% off

      1. Sarah says:

        Thanks! If I can only afford one of their products, would you recommend the original cool fat burner, or the cool gut buster?

        1. Good article from their website that could provide some clarity:…

  12. Marc says:

    Has Eric Grove gone out of business ? I’ve emailed the company days ago and I’ve yet to receive a response.

    1. Timo says:

      same here… researched all email-adresses i could find. no response…

    2. Eric CFB says:

      The Cool Fat Burner is very much in business and doing great. In fact our last university group experiment is going to be published in “The Journal of Sports Medicine and Physical Fitness!”

    3. Eric CFB says:

      ps. Marc, there is an email chain from you in our archives that had over 27 emails in it. Sounds like you received plenty of responses!

  13. Alistair Donohoe says:

    Hey Ben,

    I’m an Elite level cyclist racing for Australia and have been doing cold showers post training and pre bed for a few weeks now consistently but am considering getting the vests to make sure I’m doing cold thermogenesis properly.

    My question is how do I know if my cold shower is cold enough and how long should I aim to shower for to get the required benefits? Or do I need to ice bath or cool vest instead?



    1. It should be cold enough for you to feel a shock in your body and if you can make it 5 minutes that is best practice.

  14. Jon-Mark says:

    So this is now going to peer review, right?

    1. Eric CFB says:

      That’s the plan.

  15. Renee MIchaud says:

    HI Ben

    I have a question.. what if you carry your weight in the thighs and buttocks especially.. would wearing a vest or chest cold vest help in shift this at all or do you need to put the ice packs on the area that you most need to lose fat ?

    1. For this, the cold thermo approach can work, but must be combined with calorie deficit so that you mobilize the fat from your thighs and buttocks as you free up fat from the areas the vest/cool gut burner are on.

  16. Mark says:

    No doubt that cold thermogenesis has it’s benefits but I’m not sure that indirect calorimetry is the best way to measure. Not convinced that the change in respiration due to cold exposure is directly related to calorie expenditure as ventilation is a know source of error for indirect calorimetry.

    1. Eric CFB says:

      Direct calorimetry is the best way to measure calorie burning, which was one of the aspects of our experiment. It’s the gold standard, been done for decades, and is accepted by all experts in that regard.

  17. Brian says:


    I’ve been using the CFB vest for over a year. Recently, I’ve become very interested in trying the infrared sauna protocols that you’ve outlined in previous podcasts.

    What would be the best way to utilize both infrared sauna and cold thermogenesis in a daily routine?

  18. tim says:

    I got a CFB and CGB a year a few years ago and have used it off and on. At first I used it a lot, then took a break and went back to it. The second time, I tried a recomp approach and didn’t find I got the same results Eric did. I’m sure I was getting benefits from an hour of cold thermo a day (sometimes more), but it didn’t burn off those last few pounds of belly fat.

    Also, I mentioned to my nutritionist that I was drinking the cold water, and she mentioned drinking that much cold water was likely killing off good gut bacteria.

    Alas. I love the CFB and CGB! Use them about once a week, once every two weeks now.

  19. Todd says:

    I swear by CT and I own a Fat Burner vest which I use regularly. I personally believe that there are far more benefits to CT than even those referred to in the post. That said, I found the article to lack credibility or any type of objective, rational focus.

    This is not the way to drive sales in my opinion and next time this company should recruit Ben to speak about his experiences with CT and the Fat Burner vest (and even some of these studies) rather than using the approach set out in the article. I probably would not have purchased the vest if I had read this article first, but I do find immense benefit to it so I’m glad that I did purchase it.

  20. Matt Bouback says:

    Hey Guys,

    I just ordered this and wanted to get some advice on timing of workouts in conjunction with my OCR training. Typically I workout in the afternoon 3-4 pm finishing between 4-5:30. Do you recommend doing this in the morning so they heat generating phase is complete by the afternoon?

    1. Eric CFB says:

      Hey Matt,

      When you ordered, you should have been sent login info and a link to log into, which will have a lot of detailed and advanced info on how to use cold thermogenesis in conjunction w/ diet and exercise to get the absolute most out of your sessions.

      But yes, one does not want to be producing heat from other sources (exercise, hot food, hot shower, etc) close to a CFB session, as that may negate the effect.

  21. Katherine says:

    Could this also theoretically be used for lower body at as well as belly fat or would the surface area of the vest not be big enough?

    1. Eric CFB says:

      Hi Katherine,

      To induce cold thermogenesis, which is a system-wide metabolic boost, it’s probably best to focus on the torso. The further one moves from the torso (ie, down the limbs), the less effective the cold stimulus will be.

      Now if you’re talking about cold-induced spot-reduction, while our vest can duplicate the conditions needed to cause that to happen, it’s not endorsed or recommended for that use, even though we’ve tested and shown it can re-create those conditions.

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