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Bears Hibernation Ketosis

The Ketogenic Diet: Does It Live Up To The Hype? The Pros, The Cons, And The Facts About This Not-so-new Diet Craze.

The Ketogenic Diet: Does It Live Up To The Hype? The Pros, The Cons, And The Facts About This Not-so-new Diet Craze.

If you believe the buzz, ketosis — whether via the almost-zero-carb ketogenic diet or via ketone supplements— can curb appetite, enhance performance, and cure nearly any health problem that ails you. Sound too good to be true? It probably is. Want to listen instead of read? Download the audio recording here… ++++ Wouldn’t it be awesome if butter and bacon were “health foods”? Maybe with a side of guacamole and some shredded cheese on top? “I’m doing this for my health,” you could purr virtuously, as you topped your delectably marbled, medium-rare steak with a fried egg. Well, many advocates of the ketogenic diet argue exactly that: By eating a lot of fat and close to zero carbohydrates you too can enjoy enhanced health, quality of life, performance, brain function, and abs you can grate that cheese on. So, in this article, we’ll explore: What are ketones, and what is ketosis? What, exactly, is a ketogenic diet? What evidence and scientific research supports the ketogenic diet? Do ketone supplements work? Is the ketogenic diet or ketone supplementation right for me? How to read this article If you’re just curious about ketogenic diets: Feel free to skim and learn whatever you like. If you want to change your body and/or health: You don’t need to know every detail. Just get the general idea. Check out our advice at the end. If you’re an athlete interested in performance: Pay special attention to the section on athletic performance. Check out our advice for athletes at the end. If you’re a fitness pro, or interested in geeking out with nutritional science: We’ve given you some “extra credit” material in sidebars throughout. Check out our advice for fitness pros at the end. It all started with the brain. If you’ve called Client Care at Pr Continue reading >>

Vegan Ketogenic Diet For Cancer

Vegan Ketogenic Diet For Cancer

What is a vegan ketogenic diet and how can it help people being treated for cancer? Why is this diet so important to help maintain and restore our health? Is the vegan ketogenic diet scientifically proven and could it help people being treated for cancer? We are going to cover all these questions here for you. Individuals will visit us and ask if we have research and proof that what we do at An Oasis of Healing works? Where on the other hand, these individuals will never ask the white coats or doctors at Dana Farber if they have the research and proof that the cancer treatments they are about to receive will work? There is a large amount of scientific proof on whether a vegan ketogenic diet is effective. If you’re interested in the research and scientific proof of how this works, buy the book by Thomas Seyfried Ph.D., “Cancer as a Metabolic Disease”. What is a vegan ketogenic diet? The word keto is derived from ketosis or ketones. People have fatty acids which is used to store energy. When those fatty acids are utilized for energy, they go through a process of being broken down into what’s called ketone bodies. These ketone bodies are ushered into cells and are then broken down further and transformed into fuel for the human body. This process is efficient and works perfectly in the storage of fats for conversion into energy. This process stores double the energy of carbs. When someone fasts they are actually on a ketogenic diet. The reason to be on this diet is to produce ketones. When ketones are produced we are able to get into a metabolic condition which is called ketosis. Water happens to be the best form of a ketogenic diet. However, it’s not great for someone who had cancer because they would become to weak. They need the fat and nutrients that come wit Continue reading >>

How Do Bears Hibernate?

How Do Bears Hibernate?

Somewhere near Portsmouth there is probably a bear hibernating. How do bears do that? The first thing to clarify is that hibernating is not sleeping. The brain activity of hibernating animals is like awake brain activity. In fact when they “wake up” from hibernating many mammals show signs of sleep deprivation and may have to sleep more for a few days. These are some things that are known about hibernation in bears.(1) – For as many as 7 months of hibernation bears go without eating, drinking, defecating or urinating, in contrast to chipmunks and other small mammals that get up to do that stuff every week or so. – Bears hibernate at or near normal body temperature, in contrast to the those other small mammals who hibernate with a body temperature near ambient, approaching but not falling below 0°C. – Weight loss in hibernating bears ranges from 16% to 37% of body weight at the start of hibernation. So they will need to put that weight back on before the next hibernation. – Bears conserve lean body mass during hibernation using almost only fat combustion for energy needs. – So fat content at the start of hibernation is 36% to 38% of total weight in black bears and 49% in polar bears and declines proportionate to the decline in body weight. – Blood lipids (cholesterol, triglycerides, and free fatty acids) increase during hibernation, a result of increased combustion and decreased production of fat. – Ketosis which is a sign of fat burning in starving humans does not occur in hibernating bears. – Total body water, blood volume, and water content of plasma and red blood cells do not change during hibernation in black bears. – During hibernation, black bears maintain bone mass and measures of bone formation. In other species undergoing long periods of Continue reading >>

5 Stages Of Activity And Hibernation

5 Stages Of Activity And Hibernation

The annual cycle of black bear activity and hibernation has five stages: The stages differ in biochemistry, physiology, appetite, and level of activity. The onset and duration of the stages are genetically programmed to fit regional norms of food availability, which differ across America. When people defined hibernation simply in terms of temperature reduction, bears were not considered hibernators. However, when biologists discovered the many metabolic changes that let black and grizzly bears hibernate up to 7 ½ months without eating, drinking, urinating, or defecating, they realized that body temperature was only a small part of hibernation. They redefined mammalian hibernation as a specialized, seasonal reduction in metabolism concurrent with scarce food and cold weather (Watts et al. 1981). Black bears are now considered highly efficient hibernators. Before researchers from the Wildlife Research Institute videotaped 3-year-old June digging this den in Eagles Nest Township, Minnesota, they had no idea some bears made dens so early—July 19, 2004. It was the first time researchers watched a bear dig a den. The most interesting part happened when she encountered a 68-pound rock. She did not make futile attempts to roll it up the steep incline of the entryway. In 2003, the BBC phoned researchers for help with a documentary using new thermal imaging technology. The telephone conversation sounded something like: BBC: “We’re looking for someone dumb enough to try putting tiny cameras under a mother black bear with cubs in a den. Do you have such a person?” Researcher: “Will it have educational value that we can use at the Bear Center someday? BBC: “Yes. One of the cameras will make the very first thermal images of heat loss patterns in dens.” Temperatures rem Continue reading >>

Talk:ketosis

Talk:ketosis

Ideal sources for Wikipedia's health content are defined in the guideline Wikipedia:Identifying reliable sources (medicine) and are typically review articles. Here are links to possibly useful sources of information about Ketosis. PubMed provides review articles from the past five years (limit to free review articles or to systematic reviews) The TRIP database provides clinical publications about evidence-based medicine. Other potential sources include: Centre for Reviews and Dissemination and CDC WikiProject Medicine (Rated C-class, Mid-importance) This article is within the scope of WikiProject Medicine, which recommends that medicine-related articles follow the Manual of Style for medicine-related articles and that biomedical information in any article use high-quality medical sources. Please visit the project page for details or ask questions at Wikipedia talk:WikiProject Medicine. C This article has been rated as C-Class on the project's quality scale. Mid This article has been rated as Mid-importance on the project's importance scale. This article is or was the subject of a Wiki Education Foundation-supported course assignment. Further details are available on the course page. Assigned student editor(s): Matt34am. Assigned peer reviews: Ashbyaa, Gruskyd. Ketosis v Ketoacidosis?[edit] My understanding is that these are parts of the same spectrum; severe ketosis is called ketoacidosis. This article implies that they're different things. Anyone have a source? Friday 21:24, 22 July 2005 (UTC) Yes, Harrison's Principles of Internal Medicine, see the section on the body's defense against hypoglycemia.--Silverback 06:32, July 23, 2005 (UTC) Sort of. Ketoacidosis is when you have so many ketone bodies that your blood becomes acidic. So it's sort of like having severe keto Continue reading >>

How You Can Lose Weight With A Ketogenic Diet

How You Can Lose Weight With A Ketogenic Diet

Are you frustrated by your inability to lose weight? There are many diet programs that assert their ability to aid in weight loss but they often have contradictory philosophies or are based on unsubstantiated claims. It’s no wonder why so many people become discouraged and give up on their weight loss goals! But what if I told you that there was an effective and scientifically proven diet that could help you lose weight without counting calories and while eating delicious foods like bacon and cheese? Well there is, and it is called the ketogenic diet! The Ketogenic Diet The ketogenic diet takes advantage of a completely natural metabolic state called ketosis. Ketosis is when the body is using fat for energy instead of sugar. It is called ketosis because in times of starvation the liver breaks down body fat to produce energy packets called ketones. Ketones can be used as an alternative source of energy by the mitochondria (power plants) in most of your cells. In fact, one of the primary functions of body fat is to serve as an alternative fuel source when food is sparse. Think of a bear fattening up for winter so that it can burn up body fat as energy throughout the winter hibernation. The problem for modern humans is that the winter hibernation never comes and we just keep storing fat. Historically, people did not eat all day or even everyday. We were designed to go through periods of low or no food intake. During these times of austerity, the body would utilize stored body fat to fuel cellular processes. A ketogenic diet allows you tap into that fuel source without having to suffer through fasting and starvation. This is why Dr. Colbert recommends a modified ketogenic diet for his Slender System weight loss program. (Click here to join for FREE today!) What it Looks L Continue reading >>

Do Hibernating Bears Urinate?

Do Hibernating Bears Urinate?

And now for a discussion of a burning nephrology question: what happens to a bear's renal function when it goes into hibernation? (Thank my brother for raising the question while he was a medical student.) The simple answer to the headline question is: no, they do not. The details behind what does happen to renal function and nitrogenous waste disposal in hibernating bears is unfortunately not fully worked out yet, but what is known is a fascinating example of adaptive physiology. Bears hibernate in spans of a few weeks to several months, depending on the species, the weather, and available food stores. During that period, their metabolism drops to about a third of normal. There is a shift away from protein and carbohydrate metabolism toward fat breakdown. These processes result in a few notable changes in renal function: creatinine rises (from an average of 1-1.5 mg/dL to 3 mg/dL, thought to be due to decreased renal perfusion), and urea:creatinine ratio falls (as a result of decreased protein metabolism). A small amount of urine, about 100 mL, is produced, and the water and nitrogenous breakdown products are reabsorbed through the bladder. How does this happen? No idea. Urea is degraded, again by an unknown mechanism: one theory is that urease-producing bacteria in the gut aid in breakdown. Nitrogen is also thought to be shunted toward protein anabolism. The amazing result is that blood from hibernating bears does not contain an elevated level of urea, uric acid, amino acids, or ammonia. They replenish the water lost via respiration via lipolysis, where water is an end product. Interestingly, despite increased fat metabolism, bears do not develop a ketosis. Again, not sure why (may be related to increased glycerol metabolism). So, next time you see a bear foraging thr Continue reading >>

Best Ketogenic Diet Book For Cancer

Best Ketogenic Diet Book For Cancer

The best Ketogenic Diet Book for Cancer will be available to the public soon. I’m currently completing what will be once published the best ketogenic diet book for cancer available on the market. This book will be a raw vegan ketogenic diet book which comes from decades of firsthand experience helping people heal from cancer. I’m asked often if this vegan keto diet is science based? The answer is yes, it is backed by science big time! My book will be drawn from years of helping people restore their health and go on to thrive. We use this healing diet at An Oasis of Healing, the healing center I founded over a decade ago. A raw vegan ketogenic diet works in harmony with our comprehensive cancer care program. Raw plant based nutrition is key to healing from cancer and works in harmony with the laws of nature. Let’s look at what the word Keto means? Keto also means ketosis or ketones. What is the function of ketosis? Fatty acids allow human beings to store energy. As these fatty acids are separated into different pieces they become fuel for the body. When they are separated even further, they become ketone bodies which consist of three molecules. The ketone bodies are carried into cells and then split apart even more to become pure fuel for the body. This fuel provides the necessary energy for the body. These fatty acids produce twice the amount of energy versus carbs and protein. Fat is nature’s gift to humanity as a result of its capacity for energy storage. Why do you think bears are able to hibernate all winter? They eat a lot and as a result store fat. They then go into hibernation and live off their stored fat. While they hibernate, the bears are in ketosis. The Best Ketogenic Diet Book For Cancer Can Help Reverse This Pandemic There’s a right way and a wro Continue reading >>

Protein And Fat Metabolism In Hibernating Bears.

Protein And Fat Metabolism In Hibernating Bears.

Abstract Hibernation in the bear (Ursus americanus) is unique in that it is continuous for 3 to 7 months and occurs at near normal body temperature, yet the bear does not eat, drink, urinate, or defecate. During hibernation there is no loss of lean body mass because amino acids enter protein synthetic pathways at increased rates producing reciprocal decreases in entry into the urea cycle. The urea that is formed is hydrolyzed and the nitrogen released is combined with glycerol to form amino acids, which reenter protein synthetic pathways. Body fat supplies the substrate for metabolism (400 kilocalories/day). Ketosis does not occur. Metabolic water is sufficient to maintain normal hydration. About 100 ml of urine is filtered daily by the kidneys but the baldder wall transports water and solute back into blood at a rate about equal to their entry into the bladder. The bear cannot duplicate its winter adaptation in summer when housed in the cold and dark. During hibernation the bear shows hypothalamic hypothyroidism and increased testosterone production. These changes appear necessary for developing the selective states of anabolism and catabolism found in the hibernating bear. Continue reading >>

Hibernating Bears 'a Metabolic Marvel'

Hibernating Bears 'a Metabolic Marvel'

For the first time, scientists say they have been able to monitor a bear's vital signs continuously during a six-month period of hibernation. To their surprise, the researchers discovered that despite lowering its metabolism by 75 percent, a hibernating bear's internal temperature barely drops at all. The bear study took place at the University of Alaska, Fairbanks. The bears spent the winter in a hibernaculum — basically a big box. The researchers weren't sure whether the bears would be willing to spend the winter in this small, artificial cave. "We anticipated they might just tear the place up or go on strike or something," says Brian Barnes, one of the authors of the new study. "But they actually showed very natural behavior of getting ready to hibernate. They curl up, they go to sleep. They begin to quiet their heart rate, slow their breathing and their metabolic rate plunges." The fact that a bear could reduce its metabolism so much with such a small drop in temperature was a surprise. Barnes says two factors appear to be responsible. First, a bear has a lot of fat and thick fur, so it is well-insulated. Second, when a bear's internal temperature drops below about 90 degrees Fahrenheit (99 degrees is normal for a bear), it starts to shiver. The shivering produces heat, and the bear's temperature rises a few degrees. This periodic shivering occurs throughout the winter. 'A Closed System' Barnes says just about everything a bear does while hibernating is remarkable. "Bears don't eat, drink, urinate or defecate for six or seven months," he says. They make their own water, probably by metabolizing fat, and they get rid of wastes by breaking them down internally. "They're a closed system. All they need is air, and they can do just fine. They're a metabolic marvel," he Continue reading >>

Does Quitting Carbs Cause Thyroid Issues?

Does Quitting Carbs Cause Thyroid Issues?

Alright, this is a controversial one. Anything Paleo-orientated generally is. But let’s wade in. I have a number of reasons for distancing myself from the Paleo movement. I agree with many of the dietary principles inherent, just not the faddishness, the fanaticism and the insistence on basing it on a meta-theory of how we ate 10,000 years ago. I’m also cautious about the whole low/no-carb fervour in general. It’s not for everyone. Like, for instance, anyone trying to get pregnant. But today I want to raise this one: cutting carbs might just trigger thyroid problems. Strap in. I recently came across American biochemistry and genetics expert, Dr. Cate, and have asked her to flesh things out… People who run into trouble going low-carb seem to follow a pattern. First, they (make) a relatively abrupt switch to low carb (often less than 50 gm). Initially they lose weight as hoped but then, instead of feeling more energetic from their weight loss, they develop fatigue, sometimes accompanied by symptoms of low thyroid function including cold extremities, hair loss, and digestive problems. Because their fatigue and other symptoms are classic for thyroid malfunction, many will get their levels tested, only to come away confused when the tests health practitioners typically order (TSH and T4) come out normal. Those who get more extensive testing may get a test called reverse T3, or rT3 for short. These are often abnormally high, leaving them to believe they have found the root of the problem. Some are given a prescription for T3 (or thyroxin) in hopes of regaining energy and the intervention seems to help, at least a little. Reverse T3 is a kind of chemical opposite of regular T3, a mirror image compound called an enantiomer. Reverse T3 has opposite effects of T3, and has Continue reading >>

Protein And Fat Metabolism In Hibernating Bears

Protein And Fat Metabolism In Hibernating Bears

Abstract Hibernation in the bear (Ursus americanus) is unique in that it is continuous for 3 to 7 months and occurs at near normal body temperature, yet the bear does not eat, drink, urinate, or defecate. During hibernation there is no loss of lean body mass because amino acids enter protein synthetic pathways at increased rates producing reciprocal decreases in entry into the urea cycle. The urea that is formed is hydrolyzed and the nitrogen released is combined with glycerol to form amino acids, which reenter protein synthetic pathways. Body fat supplies the substrate for metabolism (400 kilocalories/day). Ketosis does not occur. Metabolic water is sufficient to maintain normal hydration. About 100 ml of urine is filtered daily by the kidneys but the baldder wall transports water and solute back into blood at a rate about equal to their entry into the bladder. The bear cannot duplicate its winter adaptation in summer when housed in the cold and dark. During hibernation the bear shows hypothalamic hypothyroidism and increased testosterone production. These changes appear necessary for developing the selective states of anabolism and catabolism found in the hibernating bear. Continue reading >>

Ketosis In An Evolutionary Context

Ketosis In An Evolutionary Context

Humans are unique in their remarkable ability to enter ketosis. They’re also situated near the top of the food chain. Coincidence? During starvation, humans rapidly enter ketosis; they do this better than king penguins, and bears don’t do it at all. Starvation ketosis Humans maintain a high level of functionality during starvation. We can still hunt & plan; some would even argue it’s a more finely tuned state, cognitively. And that’s important, because if we became progressively weaker and slower, chances of acquiring food would rapidly decline. Perhaps this is why fasting bears just sleep most of the time: no ketones = no bueno..? Animals with a low brain/carcass weight ratio (ie, small brain) don’t need it. Babies and children have a higher brain/carcass weight ratio, so they develop ketosis more rapidly than adults. Is this a harmful process? No, more likely an evolutionary adaptation which supports the brain. The brain of newborn babies consumes a huge amount of total daily energy, and nearly half comes from ketones. A week or so later, even after the carbohydrate content of breast milk increases, they still don’t get “kicked out of ketosis” (Bourneres et al., 1986). If this were a harmful state, why would Nature have done this? …and all those anecdotes, like babies learn at incredibly rapid rates… coincidence? Maybe they’re myths. Maybe not. Ketosis in the animal kingdom Imagine a hibernating bear: huge adipose tissue but small brain fuel requirement relative to body size and total energy expenditure. No ketosis, because brain accounts for less than 5% of total metabolism. In adult humans, this is around 19-23%, and babies are much higher (eg, Cahill and Veech, 2003 & Hayes et al., 2012). For the rest of this article and more, head over to Pat Continue reading >>

The Bears Take On Hibernation Biology Essay

The Bears Take On Hibernation Biology Essay

Disclaimer: This essay has been submitted by a student. This is not an example of the work written by our professional essay writers. Any opinions, findings, conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of UK Essays. Bears are members of the family Ursidae, there are eight species alive today, with a large geographical range. They are found in North America, South America, Asia and Europe; they occupy a large range of habitats, from the Arctic tundra to temperate forests (Craighead Institute 2010). During winter, bears enter a state of dormancy. Most animal species become dormant to some extent during their lives, as an energy saving mechanism. Sleep is the archetypal form of dormancy, with animals retiring to a nest, assuming a sleep posture, remaining behaviourally quiescent and exhibiting elevated arousal thresholds (Heller et al 2004). A more extreme form of dormancy is torpor. Torpor is characterised by a controlled reduction of body temperature (Tb), metabolic rate, and other physiological functions (Geiser 2004). Torpor has the superficial appearance of sleep, indeed torpor and sleep are believed to be homologous. This has been supported by numerous electroencephalographic (EEG) studies (Heller et al. 2004). There are two basic forms of torpor used by heterothermic animals, hibernation (or prolonged torpor) and daily torpor. Daily torpor is usually not as deep as hibernation, lasts only for hours rather than days or weeks, and is usually interrupted by daily foraging and feeding (Geiser 2004). There is a lack of agreement over whether the winter dormancy of bears constitutes "true" hibernation. Hibernation is defined as "the dormant condition into which many animals and plants pass whe Continue reading >>

Going Low-carb Too Fast May Trigger Thyroid Troubles And Hormone Imbalance

Going Low-carb Too Fast May Trigger Thyroid Troubles And Hormone Imbalance

If you’ve been turned on to the low-carb Paleo diet craze, you may have noticed increased energy, better digestion and happier mood, and a shrinking waist line. Good for you. But some folks who’ve taken the Primal leap—particularly those who were previously on a high-carb diet—have been faced with unexpected side effects waving them back to the world of bread, sugary fruits and sweet potato casserole. Interestingly, these side effects include a wide range of symptoms that are nearly identical to symptoms of severe thyroid hormone deficiency. More interestingly, lab tests often show normal or near normal thyroid function. More interesting still is that these symptoms seem to only be relieved by adding back carbs into the diet, sometimes upward of 300 grams—a level I consider to be very likely to harm. Why is this happening? Is it that low-carb simply doesn’t work for everyone, or is something else going on? In an effort to get to the bottom of this, low-carb blogger Jimmy Moore is asking his cadre of low-carb literate practitioners to weigh in on the issue with our opinions. This so happens to be an issue I’ve been pondering since reading about the controversy over safe starches, and a couple pieces of the puzzle recently fell into place that I think I add up to at least one explanation for the debilitating symptoms some people develop on going low-carb, and offer a method for anyone going low-carb to do so without problems. Here’s what I discovered about those with thyroid problems. Abrupt Change May Be too Much For the Thyroid People who run into trouble going low-carb seem to follow a pattern. They follow any number of diets from SAD to vegan before making a relatively abrupt switch to a low carb (often less than 50 gm) diet. At first they lose weight Continue reading >>

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