Doctor's Note

Sorry for the cliffhanger! Stay tuned for Boosting Brown Fat Through Diet.

I briefly touched on the role cold temperatures can play in weight loss in The Ice Diet.

Then of course there’s calories in (Nutrient-Dense Approach to Weight Management) and calories out (How Much Exercise to Sustain Weight Loss).

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  • Dasaniyum

    Another cliffhanger…

    • Joseph Gonzales R.D.

      Check out some of these videos on metabolism in the meantime ;-) It may give away the answer though. How to Upregulate Metabolism and Fat Burning Flavonoids.

      • Atlantisarch

        Thanks. Do you know if going that way may lower sweat production ? I’m a long distance runner and sweat a little too much/easy in my opinion, inducing issues with minerals compensation during the run …
        I wonder if thermoregulation mecanisms is also linked to those molecules and if increasing basal metabolism may lower my sweat production by making my body more used to constant heat loss.

        • Joseph Gonzales R.D.

          Interesting question. I have no idea! Looking into experienced runners on the topic of sweating I found an article by Scott Jurek. This book on thermalregulation mentions “the skin from different parts of the body does not have the same sweating behavior, and there exist other internal temperature sensors besides the hypothalamus.” Complex equations about sweating mechanisms listed. Maybe others have more to add and are runners themselves?

          LastIy, I found one study titled, Control of thermoregulatory sweating during exercise in the heat that may have more answers. It’s an older study. I suggest looking on the right hand side for related articles. Let me know if any of these links help or what you find?


          • largelytrue

            I wouldn’t panic too much about having to drink water with electrolytes in it during these sorts of competitions if it must ultimately come to that. Leaving tradeoffs with health aside, thermoregulation helps all the body’s tissues on average, so you don’t want to jimmy the sweating mechanisms so that you are performing less well. That said, the body can be prepared so that it has less requirement for cooling from sweat in the first place, by not heating up unnecessarily.

            If anything, this probably means lowering the activity of brown fat by exposing the body more or less continually to a hotter environment, while endeavoring to keep ectopic fat levels low. Improved vasodilation may also help since we also keep cool through blood vessels at the surface of our skin, and as described in that study, the mineral content of sweat generally raises the enthalpy of vaporization, making the evaporated sweat particles more cooling. I would also consider getting a lightweight uniform of the sort that wicks away sweat from much of your body. When your sweat is beaded up and you are running it can more easily drop off your body, making you lose the opportunity to cool yourself by evaporating it.

            For more on the general idea of how to modulate performance in hot environments, I think this Medscape article</a? is a pretty good start as is the ACSM's position stand on the topic of fluid replacement. Most notably, copious sweat production is a sign of aerobic fitness and acclimatization to hot environments. As the body adapts to performance in hotter conditions, it naturally tends to make sweat more dilute in order to conserve minerals.

            My main concern for you is that you really need to make sure that your belief about having problems with low sodium during long runs is well-founded on sound evidence. There are tradeoffs in these kinds of situations, and you want to get the right balance, not the one that can decrease performance or harm you. And for a variety of reasons we know that there is a lot of hunger to adopt behaviors on bad information in the athletic world. You don’t want to be like the weightlifters who ‘feel’ that whatever protein they are getting is probably less than desirable, or the runners who obsessively hydrated in the direction of maintaining body weight and sometimes killed themselves. The idea of replacing electrolytes has a lot of currency in the culture of endurance sports, and in the do-it-yourself world of amateur running there are strong reasons to anticipate a lot of bad information from sincere people.

        • Wilma Laura Wiggins

          I would say count your blessings, from someone who hardly ever sweats. It is one of the only natural ways of detoxing all the horrible toxins we take in all the time from the air, water and food.

          • Atlantisarch

            aiming for balance is key …

          • Jason Harrison

            @wilmalaurawiggins:disqus sources please? We also exhale, urinate and defecate. Why would “toxins” only be eliminated through sweat? Sources, sources, sources.

          • Wilma Laura Wiggins

            I said “one of” not “the only”. I don’t know any sources for this idea that some toxins are not released by exhaling, urinating or defecating when they are in fat. Yet somewhere I got that idea. Breast feeding is another way of releasing toxins.

          • Jason Harrison

            If you find any other sources please let us know. I’m pretty sure that has a number of articles on the topic of “toxins” aka, and please read this in a scary voice: “the evil that accumulates within and which must be eliminated by….”

  • Marge

    I have heard that cold showers running over shoulders helps burn fat.

  • Harry Tuttle

    Such a tease…

  • VenlaTuominen

    Click on the last cited source to see the answer, if you are as impatient as I am!

  • TonyH

    Took a lot of biology classes in college but never heard of brown fat. Learn something new from every NutritionFacts video. Thanks.
    Wonder what the structural difference, if any, between brown fat and that stored in adipose tissue.

    • From wikipedia: “In contrast to white adipocytes (fat cells), which contain a single lipid droplet, brown adipocytes contain numerous smaller droplets and a much higher number of (iron-containing) mitochondria, which make it brown.[2] Brown fat also contains more capillaries than white fat, since it has a greater need for oxygen than most tissues.”


    • Joseph Gonzales R.D.

      Ha! Perhaps in the meantime we can catch-up on these videos on metabolism: How to Upregulate Metabolism and Fat Burning Flavonoids. Let the countdown to Friday begin…

    • jj

      Capsinoids-nonpungent capsaicin analogs-are known to activate brown adipose tissue (BAT).

  • Darryl

    So tempted to spoil, as this topic as been an interest of mine for a while.

    The dangerous weight loss compound DNP works similarly to the uncoupling proteins (UCP1, UCP2) in brown fat: by permitting proton leak and reducing electric potential across the mitochondrial membrane, permitting “futile” respiration without generating the cellular fuel of ATP. This doesn’t just burn energy, it also dramatically reduces mitochondrial ROS production, and small reductions to mitochondrial membrane potential confer disproportunately large, non-linear reductions on oxidative stress 1. Mice with naturally more uncoupled respiration live substantially longer 2, and low-dose DNP confers lifespan benefits 3, 4. While research on controlled release DNP 5 is ongoing, enlisting our own uncoupling proteins appears so much safer. There is indeed a long list of compounds that induce UCP expression, even in a hybrid brown-white (“brite”) fat we carry. One was in the news today 6.

    • Joseph Gonzales R.D.

      Last reference (6) not linking. Just curious to see the news article. Please repost if possible. Thanks, Darrly!

      • Darryl

        It’s now “7′. I edited, as the dangers of DNP need to be emphasized.

        • Matthew Smith

          Dear Darryl, have you seen Dr. Greger’s video on the mitochondrial theory of aging? A vegetarian diet seems to really help the mitochondria keep from rusting. Niacin is readily converted to NAD, streamlining mitochondria work. NADPH is the fuel source of the body. Some supplement companies have stated selling NAD, claiming longevity benefits. Phosphorous could also help mitochondria. As Phosphorous makes up a large portion of DNA and is used in energy production, and makes up about half of the bone structure, perhaps it is possible to get Phosphorus deficiencies. Phosphorus would also help the mitochondria and should improve lifespan in the mitochondrial theory of aging. Are you researching longevity? How many years do you think you could add to people’s lives? Would you share eventually? The mitochondrial theory of aging could also be called the mitochondrial theory of mental health as efficient energy production including that in the brain really improves well being.

          • Darryl

            Matt, I’m fascinated by recent strides made in experimental gerontology, though I usually discuss non-diet/lifestyle elements elsewhere.

            There’s no need for extra phosphorus, indeed phosphorus additives in food are linked to higher kidney disease risk and mortality and higher cardiovascular disease risk and mortality. See Dr. Greger’s videos on phosphorus.

          • Matthew Smith

            Dear Darryl,

            Thank you for responding to my question. I am excited to hear that you are more interested in curing the aging disease, it’s a disease now, than I am. Thank you for sharing the link to phosphorus videos. Phosphorus is not the same as the organo-phosphate fertilizers used. Phosphorus is also a bit of a sticking stone in medicine. When people get Osteoporosis, they are prescribed Phosphorus by way of bis-phosphates. Wouldn’t it be simpler to just get out the pen pad and write “Phosphorus.” I am mystified at kidney disease. The fear of dialysis should be enough to make almost anyone consider a whole foods plant based lifestyle. The diet that put dialysis patients on is… the opposite of a healthy diet because their is so much phosphorus in health food. When someone has too much Phosphorus in their urine, they are put on dialysis to remove the Phosphorus. The body then begins digesting the bones to get more Phosphorus for energy reactions and Osteoporosis begins. This happens by Osmosis even. Many dialysis patients suffer from broken bones. They are sucked to death from many angles. Dr. Greger has a video that the vegan diet is a completely perfect approach for kidney disease… well, not entirely. They probably still need more Phosphorus in some way to return to its proper storage in the bones, and use in the mitochondria, and processing in the genes. Many Americans crave high sugar diets. This can lead to sickness, diabetes, and hypoglycemia. I think there is some possibility, given the abundance of ATP, with phosphorus in the brain, and the amount of Phosphorus needed for DNA replication, that a phosphorus deficiency can cause some mood disorders and people self medicate with sugar. After I gave up dark diet soda I suffered from stress. Phosphorus pills cured me. Even though Phosphorus is in everything, it may be tightly bound in DNA and the stomach is not a prefect fusion laboratory. Phosphorus is in everything in people too. GIven the recent research on NAD and life extension, it seems plausible that Phosphorus could also be a part of a youthful diet. Have you seen this study on pantothenic acid and longevity in mice?

            Pantothenic acid also is in everything… and in everything in me too. Very useful to promote longevity. I had thought the federal government’s war on vitamins would be over by now. It seems to be intensifying.

          • There’s also a new mitochondrial view of cancer being proposed by some of the leading scientists. Damage to the structure and function of mitochondria precedes the genetic damage that leads to cancer, says Dr. Thomas Seyfried, author of “Cancer as a Metabolic Disease.” (The culprit is the same from both the genomic and metabolic points of view–carcinogens.)

            I’ve read that mitochondrial DNA only gets passed down through the mother, not the father. Wow. That puts a huge responsibility on young women to live a healthy lifestyle.

    • Rhombopterix

      years ago i used to go ice fishing. I dreaded the first day because that was torture. but the second day was tolerable. after a week of this nutty behaviour just putting the gear in the car would set off my “heat engine” and I could feel my fingers and toes start to pulse and tingle as we approached the lake and the heat was on. Years later I learned about BAT and figured I was training mine to compensate the icy conditions.

    • Dasaniyum

      wow the things I learned in biochemistry are coming back to me. Thanks for the info!

  • Plantstrongdoc M.D.

    Actually increasing body temperature might not be a good idea since numerous studies in animals has demonstrated prolonged lifespan if body temperature is lowered – so keep cool

  • Rhombopterix

    lessee…I bet you have to eat a steak …. right. heh

  • NCharles84

    Aw, C’mon!

  • Brux

    Oh … a cliffhanger eh?

  • Matthew Smith

    Three quarters of our energy production goes just to maintaining our heat. Most of the rest goes to regulating brain function. Thus, being cold could make you lose more energy. Efficient use and production of energy is believed to play a part in longevity. I am excited to hear there are foods that can improve energy regulation, and am excited that a whole foods plant based diet can speed metabolism, surely the foods to be revealed are the ones that would lead to the longest lifespan.

    • Jason Harrison

      Sources? 75% to keep us warm, in which environment and climate? Brain function does require energy, are you including in one of these two energy consumers basal metabolic systems (breathing, heart, digestion). Using our muscles generates movement inefficiently and thus a lot of heat. By your numbers how much is left over to accumulate fat deposits?

      • Matthew Smith

        Hello. Sorry, no sources, I learned that 3/4 of the Calories we intake go to making heat in elementary school. I think what I saw was referring to running the mitochondria to make ATP from food and in the process shaking off some heat. Making heat, making your body at 98.6 degrees requires a great deal of energy. I was always confused by what organ makes heat. I think the brain tells the mitochondria at what temperature to keep the body with various chemicals and metabolites. Slave keeping the mitochondria is challenging to the brain. Streamlining this process has been selected by science as the fountain of eternal youth. Do you have information to the contrary? It only takes a very slight caloric imbalance to cause the body to store fat, I guess. I would love to hear about how energy metabolism is used. Cooling the body is also very expensive of heat. Seventy percent of the immune system is in the digestion, which means most of our chemical arsenal goes to digesting food. That must take a lot of concentration. I think our energy budget is redundant to a large degree.

        • Jason Harrison

          I googled this issue and I think you are confused about heat, as an intentional product of mammal biology in contrast to heat as a side effect of chemical and biological processes.

          Have a look at wikipedia:
          – about 60% of chemical energy in food is lost as heat by the process of digestion
          – mammals can adjust their basal metabolic rate in order to engage in strenuous exercise (running from predators, running after prey, or pulling potatoes out of the ground, grinding grain, etc.)
          – the human body is about 20-25% efficient at extracting the chemical energy in food and producing mechanical energy. The result is also heat, exhaled carbon dioxide, urine, and feces. This means that if you burned the food (by mixing it with pure oxygen) this would be 100% at producing heat. If you used the heat to make steam, to turn a turbine to make electricity, you could be say 40% efficient (see
          – in the same way, if you pedaled a stationary bicycle and it was connected to a generator, you could generate about 20% of the original chemical energy in the food as electrical energy
          – so burning food to make electricity is a bad idea, and feeding food to people to ride stationary bicycles to make electricity is twice as much of a bad idea.
          – calculations suggest that you can cycle about 100 miles in a day, on about a gallon of food. When you sleep/rest/eat you are still consuming calories, so the result is that you use only a portion of your food to move the cycle 100 miles. This leads to a “miles per gallon” efficiency of about 160 miles per gallon. (

          So, the digestion of food makes a lot of heat and some ATP. Using your muscles makes heat. And BAT or muscles can also burn fat to make heat.

          Cooling the body on the other hand: open up the sweat glands and let out some sweat. This is probably a very very easy thing to do, requiring very low energy expenditure. Otherwise you’d get into a terrible cycle of too hot, therefore sweat, sweating makes you a bit warmer, so sweat some more, that makes you warmer, so sweat some more, and now you’re warmer yet, and if have to exert yourself to sweat your temperature goes up and you cook yourself.

  • wdgirl

    Check out this new line clothing being developed that uses this principle for weight loss.

    • Thea

      wdgirl: Wow. That’s very interesting. I have to wonder how effective it will be. They don’t seem to have any independent studies showing X pounds on average lost after wearing their particular product X days…

      Every time I hear about the concept of potentially losing weight due to temperature, I think about my co-workers who guzzle down tons of super-icy water in the hopes that it will help them lose weight. While the theory may be sound, it doesn’t seem to work in practice that I can see. At least not enough to offset the eating habits.

      Just commenting. I appreciated your link. Interesting stuff.

  • Nutrition research on mindful eating.
    I have been plant based nutritarian for about a year. I have lost no weight.
    I have recently been reading about mindful, intentional eating. Dr. Michelle May (Eat What You Love), Jon Gabriel (The Gabriel Method), Marc David (The Institute for the Psychology of Eating) and many other claim that eating with intention changes how our bodies use food. They claim it even determines how much nutrition we do or do not get from what we eat; for example– people who eat without TV, reading, or any other distractions eat 20% less without thinking about it. It is also claimed that sugar is not made available to the cells if consumed when we are angry.

    Do you know of any solid nutritional studies addressing this?

    • Thea

      Tim: I can’t answer your question about mindful eating. I have never heard those claims before. I hope someone will be able to answer you specific question.

      But I do have something that might be helpful for your: Eating based on the concept of calorie density is a well-researched and effective method for losing weight. It is consistent with the nutrarian diet, but tweaked for losing weight. If you are interested in learning more, there is a free lecture called How To Lose Weight Without Losing Your Mind

      I also *highly* recommend a great companion talk from Jeff Novick on calorie density. It looks like it is sold out right now. But maybe if enough people e-mail him (there is a link at the bottom of the page), he will make more copies.

      Good luck. I hope you are able to meet your goals.

    • Wade Patton

      A simple inquiry as I do not know, does “plant-based nutritarian” include added sweeteners and oils?

    • Joseph Gonzales R.D.

      Thanks for reposting your question. There is research behind “Mindful Eating” and I think it’s important for everyone to consider. This article highlights other doctors who encourage mindful eating. One researcher mentioned was Brian Wansink who has many publications that may interest you, like “Watching Food-related Television Increases Caloric Intake in Restrained Eaters,” and many more.

      Here are 25 studies on mindfulness and nutrition. Browse thru a few and see what you find! Of course being “mindful” means something different for everyone, but when applied to eating behaviors and stress management the outcomes appear highly beneficial. Let me know if these help? Another wonderful book I almost forgot to mention is Doug Lisle’s, The Pleasure Trap. I think he lays out solid nutritional studies. Dr. Forrester (one of our amazing moderators here) can offer better information about this than I can. So if we need more help surely he can weigh-in.


  • Wade Patton

    What then of this: ?

    I do much prefer the coolness of Fall, Winter, and early Spring for most of my outdoor activities, but am acclimated to working out of doors in the South in Summertime. I suppose my “extreme” low-fat way of eating and practically non-existent cholesterol consumption will cover the concerns of the study posted above.

  • MarthaLA

    So, doctors do us a big favor, leaving us waiting in the examining room in our little hospital gowns, shivering, until they get around to us? Maybe I’ve lost a pound or two that way over the last five years? Hmmm.



  • LG King

    Somewhere sometime back I heard on this forum…”the fat you eat is the fat you wear”.

    Dr. Esselstyn states that to be ‘heart healthy’ you need to live in the 11-12% body fat range.

  • Brux

    Why would fat tissue be any hotter than the surrounding tissues?
    Fat is not doing any work, right, so why would it be generating heat?
    Next video I guess, huh? ;-)

  • Dawid

    What about cold shower?

  • Jarno Radde

    So this is what Wim Hoff (The Iceman) is doing…

  • christine hickey

    that wasn’t nice

  • Sara009

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  • Sara009

    Just a tip for everyone struggling with weight issues:
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  • Ray

    brown adipose differs from white adipose specifically in that oxidative phosphorylation is uncoupled so the energy in ox phos that is normally used to generate ATP from ADP and Pi is instead given off as heat
    Swedish study from long ago, 60’s maybe 70’s, took a group of grad students, started on one side of snowy Greenland on dog sleds, as students got hot enough to remove an article of clothing researchers retained it instead of returning it, at the end of the journey I guess on the other side of snowy Greenland (but I don’t remember) students were observed comfortably sitting in t-shirts and pants as they had cultivated sufficient brown adipose tissue to provide all needed heat. Their dietary preferences progressively favored nuts, lots of nuts, by the completion of the journey.

    • Thea

      Ray: That’s a *fascinating* story. Thanks for sharing it. It raises a very interesting idea for me: You use the word “cultivated”. I’m not sure what you mean by that, but I had originally (after watching the NutritionFacts video) been picturing in my head the idea that exposure to cold temperatures would sort of wake up brown fat and make the brown stuff become very active and efficient. But when I saw your post, I thought of this idea: What if a lot of exposure to cold causes the amount/volume of brown fat to grow? Or maybe some of both phenomenon happens? Hopefully there will be some more research into this as I find the subject soooo interesting.

      • Ray

        It’s my understanding that there is brown adipose tissue distributed broadly, but mostly it’s dormant. Given the stress of cold over a period of time the brown adipose tissue is called up, cultivated, by demand of circumstances. I think this stuff was studied in the 70’s, so it’s probably in the literature if you search it.

    • Jason Harrison

      It’s more likely that the student’s muscles were burning fat to generate the heat. See Ray Cronise’s website,, or his TED Talk,
      This is a common experience of Arctic, Antarctic, and Himalayan explorers: eating pounds of fat a day to maintain weight and energy.

  • Rodrigo Cardoso
  • Guest 01

    How do the findings in weight loss due to cold temperatures relate to the frequent experienced increase in fat tissue for people living for a number of weeks in north- en south pole regions?

    • Thea

      Guest 01: I don’t know the answer to your question, but after reading your post, I came up with a theory: People moving to the north and south poles for a few weeks, would prepare heavily. They would buy extra-extra warm clothing, I would assume. They wouldn’t probably let themselves get all that cold. And I’m thinking that if someone is moving to the north pole for a few weeks, maybe it is for the purposes of research and so maybe they aren’t doing as much physical activity (no gardening at home, playing ball with the kids etc) as they might in their normal lives. So, maybe those two factors would accommodate for some extra weight/fat???

      I don’t know. I’m just having fun speculating. What do you think?

      • Guest 01

        Hi Thea,

        There is some proof for your speculation. I found this:

        Members of polar expeditions usually develop a thicker layer of subcutaneousfat in winter than in summer (Zeisberger and Briick, 1976). However, this change is more likely caused by some factors other than cold exposure, for example, less physical activity or a modified diet, and as such cannot be considered an indicator of cold-adaptation; nonetheless, its consequence is an increased tolerance of cold. So far, the only example of a preferential laying down of a substantial amount of subcutaneous fat that can be directly related to cold acclimatization is the channel swimmers (Pugh and Edholm, 1955)


        However the same source also states that some tribes of people who have adopted to cold have a significant lower metabolic rate.

        • Guest 01

          ” Nomadic Lapps, reindeer herders or hunters, who spend most of their life outdoors or in poorly heated quarters, were found to have metabolic rates during a cold night that were approximately 25% lower than those of control subjects (members of the research team) (Zeisberger and Briick, 1976)” Source:

        • Thea

          Guest 01: More fascinating info. Thanks for finding it and sharing!

  • Elaine Gardner

    Well I guess it won’t kill me to wait.

  • Sara009

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    Melissa Green from internethealt(dot) org helped me out with some awesome reviews and articles.

    All I can say is, never give up!

  • Sara009

    I’ve been struggling to achieve my optimal weight for years.

    Melissa Green from internethealth (dot) org helped me out with some awesome reviews and articles.

    All I can say is, never give up!

  • Joe Caner

    I jalapeño may not keep the doctor away, but it sounds as if it can help one shed a few pounds unsightly fat, and that’s a good thing!

  • Jason Harrison

    IMHO, the focus on BAT is misdirected. Great to explain how babies and children can be so warm without shivering (smaller surface area to mass ratio can help too). Instead, focus on where else your body can burn fat without shivering: your muscles!

    For more information on cold adaptation and how your muscles can burn fat to generate heat without shivering I strongly recommend you have a look at Ray Cronise’s website,, or his TED Talk,

    To summarise: we adapt to the cold in the winter, by both turning up the tempostate, wearing warmer clothing, and our bodies also adapt. By the time spring is approaching a “warm winter day” suddenly seems really warm. While in the summer, a cool fall day suddenly seems cold. But both may be exactly the same physical temperature. This adaptation is physiological as well as psychological. Requires about two weeks of cool, not cold, exposure, and has been found to be an effective way to burn fat without exercise or changes in diet.

  • Laurie Kesaris

    I have a question. I have for the last 20 years been a very healthy, primarily plant based eater, and weighed between 105 and 108 pounds. I am 5’3″, female, age 58. I exercise and walk regularly and maintain a healthy lifestyle. About 4 months ago I switched to a completely vegan diet, omitting all dairy, as well as the occasional chicken dishes I used to consume. I also increased my nut and soy/tofu consumption during that time. I have slowly lost weight, and am now at 101 pounds. I feel great, and my arthritis pain has improved, but my primary doctor is concerned that I am too thin. Is he right? Or, is this just the natural result of healthy vegan eating? I don’t want to be too thin, but no one has told me I look unhealthy, in fact quite the opposite. Sorry for the long question, but I’d appreciate any help you can provide. Thank you!

    • Thea

      Laurie: Congratulations on your switch to a completely vegan diet. I’m not an expert and thus can’t say whether your weight is good or not. But I wanted to give my 2 cents. Here’s what I think matters: Feeling energized/not dragging to do daily activities. Feeling pain-free. Liking how you look. It sounds as if you meet all of these criteria. So, I say, as long as you don’t continue to lose weight to the point of being emaciated, I think you are probably at a very healthy weight for you and your recent loss of a few pounds has just been your body getting to it’s own healthy spot.

      I think that when people have a problem with their plant based diet and losing weight, it is a result of not getting enough calories. But in that case, I would expect you to feel hungry all the time. You don’t report that as a problem. So, I don’t see how losing 5 pounds is a problem. My guess is that your doctor is not used to seeing healthy people. When all you see all day long is overweight people in personal and professional settings, someone who looks healthy may look off… If your doctor thinks you need to gain weight, I think your doctor should give you some concrete evidence as to why. (Is your blood work off or something???)

      If you get to the point where you feel like you have a problem with your weight, you can still eat healthy and plant based and still gain weight by eating more calorie dense foods. You mentioned eating more nuts and soy, which is good. But if you needed to, you could tweak your diet to include even more of the more calorie dense foods like starchy foods as well as dried fruits, avocados and more soy, etc.

      Make sense? What do you think?

  • jackelope62

    I surfed all winter in the Northeast for more than 45 years with air temperatures of -20 degrees Fahrenheit to 20 degrees F, being particularly cold as most winter surf is best the day after NE snowstorms when bitterly cold NW winds blow in from Canada with the water sometimes being turned into a salt water ” slushy,” also increasing the windchill factor. I also snowboarded, cross country skied, ice skated and ran outside all winter. However, exercise in the cold made me ravenous and I still did not lose weight until I changed my diet. Furthermore, swimmers in 80 degree pools accumulate more ‘protective’ fat than runners burning the same calories.

  • nk2164

    Will taking cold bath will promote fat burning ?I read somewhere it is good to have a 30 – 30 – 30 routine at the end of bath (30 sec of cold water , 30 seconds hot – then end bath with 30 seconds cold water) .