Quick Hit: I’m Back

I’ve been MIA the past month or so, intern year is a little more demanding than I initially thought.  However, each day is exciting and I really enjoy the work.  I try not to turn on auto-pilot each day, trudging through the workload.  So….I was proud of myself when I was examining the signage outside the rooms on the Oncology Unit.

Almost all of the cancer patients at the hospital end up getting multiple PET scans to stage or monitor the treatment of their cancer.  The PET scan is pretty cool.  The patient gets an IV dose of altered glucose with radioactive fluorine attached, the glucose is preferentially taken up by cancer cells as they require glucose to function and cannot use other fuel such as ketones, fatty acids, etc.  The cancer cells have a higher metabolism than most normal tissue and so the radioactivity of the fluorinated glucose can be seen in areas where tumor is located.

The fluorinated glucose is excreted by the kidneys so you can see them light up, but the lung cancer is extremely bright telling the doctors where the cancer is.

What I found interesting is the pre-PET scan diet…low carb with only 11% of calories from carbohydrate for 24 hours before the scan.  This allows your normal tissue to start running on alternative fuel sources such as ketones and fatty acids.  This helps enhance the contrast between cancer and background uptake of the fluorinated glucose because the cancer HAS to use the fluorinated glucose whereas the normal tissues can continue rolling on fatty acids and ketones.  This allows for the best possible PET scan picture because the cancer stands out that much more.

Finally, the last 6 hours before the test the patient must fast to further hammer home the contrast.  The normal tissue will be functioning completely on ketone bodies.  Again, this allows the cancer to preferentially consume the fluorinated glucose (“radiotracer”) to provide the best picture possible.

This completely takes advantage of the Warburg effect.  Cancer cells must have glucose for glycolysis, while other cells can use alternative fuel.

The diet effectively “starves the cancer” as much as possible so it is “hungry” for the fluorinated glucose.   Take a look at the typical menu for the PET scan diet.

Wow, looks a lot like my daily diet.  Now, get this….

 

Nutritionally inadequate??? Ha, I dropped 100 lbs and feel better than ever on this diet.  The periodic 24 hour fasts go further to provide that last nail in the coffin to safeguard the body from abnormal hormone levels and provide a hormetic stimulus.

I would think that if I had cancer I would want to be on the diet that starved the cancer as much as possible.  In addition, I think chemo regimens should be tested with a combination of 75/20/5 diet (fat/protein/carb) with metformin.  Metformin will decrease gluconeogenesis further, lowering the amount of glucose the liver makes in response to starvation.

I think the PET scan diet may even PREVENT cancer.  Low insulin levels combined with low levels of cancer fuel are a great combination to stay cancer free.

As Warburg states…it’s just a hypothesis…but I’m sticking with it until proven otherwise.

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Why a Calorie is not a Calorie: Part 1 AMPK

Yesterday, I came upon the annual “Obesity” issue in the medical journal Lancet about how obesity is accelerating across the world.  They estimate that 1 in 2 people will be obese, not just overweight, by 2030.  In addition, we all will be paying $66 billion a year to treat obesity-associated medical problems by the same time.  This blew my mind, and I wanted to document this prediction on my blog.  The world is failing miserably with preventing and treating obesity.  I believe that central to this failure is the persistence of the “calories in minus calories out” myth.  I want to provide a comprehensive series of blog posts that explain the cellular machinery changes that occur in response to the type of calories the body is exposed to.  I will provide an explanation into weight regulation hormones and how those hormones change in response to various macronutrients, stresses, and situations.  I hope to supply a working hypothesis regarding why I believe carbohydrates cause obesity.

The people that know me are aware of my belief that carbohydrate causes excess weight accumulation and metabolic dysregulation.  I am interested in the mechanism through which carbohydrates exert those changes; until now it’s usually explained by “carbs cause increased insulin” and “insulin is the storage hormone.”   However, I am going to try and explain the cellular machinery that responds to insulin and other hormones to cause weight gain and fat accumulation.  Then I will make the link that carbohydrates create a hormonal environment that tips the body towards metabolic disaster.

Enter AMPK

Adenosine monophosphate-activated protein kinase (AMPK) is an enzyme that is conserved through most metabolic tissues in the body including the brain, muscle, liver, fat, and heart.   What is interesting is that the enzyme is a kinase, meaning that when it is activated, it goes on to turn many other enzymes on or off.  In this way, AMPK can control many different aspects of the energy balance machinery.  AMPK is like the air traffic controller, though planes can determine their own path, one master switch controls a vast number of planes.  The more I read about the enzyme, I am convinced it plays a crucial role as the “metabolic master switch” for the body by regulating glucose uptake and fat oxidation (burning).  It responds to many of the “energy regulation hormones” including leptin, adiponectin, cortisol, insulin, ghrelin, and cannabanoid molecules.  (The next post will cover these hormones and give an overview of their roles and sources).  AMPK has specific energy regulation actions, that differ in response to different hormones, both in the brain (appetite determination) and in the periphery (fat storage/usage); I think it is crucial to cover both.  For this discussion, I will refer to hypothalamus (brain) AMPK as “brain AMPK” and I will refer to fat cell/liver cell/heart cell AMPK as “body AMPK.”

Brain AMPK

In the brain, AMPK activity is determined by the hormones mentioned above including Leptin, Insulin, Adiponectin, Ghrelin and Corticosteroids.  AMPK has been found throughout the brain but is most important in the determination of appetite through its activity in the hypothalamus and hindbrain.  Bottom line, activation of AMPK in the brain, specifically in these two areas, results in increased appetite and food intake.   Similarly, low AMPK activity will cause “anorexigenic” behavior with lower food intake and appetite.  A fasted state is known to cause high AMPK activity in the  brain while increased feeding will suppress AMPK behavior.  In this way, AMPK activity is determined by multiple hormones and is the “sensor” of the brain in determining the feeling of appetite.  This is why low-fat, low-calorie diets ultimately fail; you can’t fight the AMPK “master switch” of appetite unless you know how to periodically eat to decrease AMPK activity in the brain. I will go on to discuss how to control brain AMPK with specific macronutrient intake to maximize weight loss in part 3 of this series.

Body AMPK

AMPK is ubiquitous in the body with high concentrations in the fat, heart, muscles, and liver.  Generally, AMPK activation results in the initiation of catabolic (“energy burning”) processes while inhibition of AMPK results in anabolic processes (“energy storing”).  Some examples: AMPK activation in the liver causes decreased fat synthesis, increased fat breakdown and decreased cholesterol synthesis.  In the muscle, AMPK activation cause increased uptake of glucose from the blood, decreased glycogen (storage form of carbohydrate) synthesis, increased glycogen breakdown, and decreased glucose production in the liver.  Finally AMPK activity causes cells to make more mitochondria, the “cellular power plants,” which go on to make energy through using up glucose, fat, and ketones that are in the cell.  More mitochondria, more energy burning.

Metformin Structure (From Wikipedia)

For a quick clinical correlation, Metformin (Glucophage) is usually the first anti-diabetes drug that a Type II diabetic patient is started on to control blood sugars.  The vast majority of patients experience weight loss, decreased appetite, and increased insulin sensitivity with the drug.  Metformin is a “body AMPK” activator, working at the liver, fat, and muscle to burn energy.  Contrast that to the patients who have such bad insulin resistance at presentation that they require insulin therapy to manage their sugars.  Nearly all patients treated with insulin gain weight.  As we will see in the next part of the series, insulin is “body AMPK” inhibitor, and we should do everything we can to minimize insulin prevalence in the body’s hormonal environment…most of the time.

This primer on AMPK aims to show you why calories themselves aren’t the whole story, it is the hormonal effects of those calories that count.  The next post will focus on hormonal influences on AMPK and Part 3 of the series will discuss how different macronutrients in diet alter hormones to ultimately determine AMPK activity.   Please comment if you have questions, thoughts or opinions.

 

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Trip Home and I’m Still Standin’

I had the opportunity to fly home to Minneapolis for a quick weekend to see friends and family.  My sister is heading off to Galway, Ireland to study abroad for the whole year and my intern year schedule might cramp my style in getting to go visit so it was great to be able to say goodbye to her.  We got a little tennis in as well to shake the rust off.

The family gathered for a few meals and also to take the 2011 Christmas card photo…spoiler alert: here’s a sneak peek.

What a crew.

I also got to watch a little of the Pine Tree Apple Tennis Classic in White Bear Lake to cheer on some of my friends.  I usually love playing in the tourney but got in a little too late on Friday night to be able to play “for the children.”  I did get to enjoy the annual Narr afterparty with subsequent tippy cup, had to shake the rust off there too.

The weekend concluded with a terrific dinner with friends at Ingrid and Pete Schwingler’s condo.  All in all a nice whirlwind tour.

Despite a missed approach into the Santa Barbara runway due to late night fog, United got it done the second time around and I made it back.

On to the standin’.  I have been rocking the standing desk since moving into my place in Santa Barbara and I don’t think I’ll ever go back to sitting for work.  It is killer for improving my posture and I never feel sluggish after working at the computer.

It has to be better for you

Plus, Thomas Jefferson stood for work as well, so it’s got to be the way.  I am reading Billionaire’s Vinegar which is about an extraordinarily expensive bottle of wine that Thomas Jefferson supposedly owned.  Through reading the book, I’ve been amazed at how TJ shaped the wine collecting  and growing environment in early America.  The book has been an interesting read and I recommend it to anyone interested in wine collecting.

The Jefferson Standing Desk

Even the ER at the hospital has some standing work stations, I’m all over those when they’re available.  I’m wrapping up my last week in the ER and will post my thoughts on the experience soon.   The big finish will be a trip up to Monterey this weekend to see my Aunt and Uncle, attend some wine events, eat great food in Carmel, and compose myself before beginning my first week of working overnights in the ICU.

As my brother Andy says, “There’s no reset button on intern year” and I have to say I’m loving it…

Having been home, I’m shocked at how many people actually check out my thoughts and musings on this blog.  Please let me know how you’re all doing and leave me message in the comments!

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Ward Month 1 Complete (Part 2)

In just the first month of being an intern, I’ve already had the curtain lifted from my eyes in different situations.  I wanted to document my thoughts and memories about the “frequent fliers” of the resident service.

It’s 3:30 in the morning, my pager goes off, then my cellphone, the resident saying we have an admission in the ER.  But, not to worry, he’s a “frequent flyer” and we’ll have it done in no time.  The resident also tells me that, as an added bonus, I’m going to learn how to manage diabetic ketoacidosis (DKA).  So I get my stuff together and wander up to the ER, wondering how the resident knows that it will be a routine DKA admission without ever seeing the patient.

Little did I know, the 23 year old, Type I diabetic who is also a drug addict and alcoholic has had over 100 ER visits in his life.  He has no insurance so he always gets the stellar care of the resident service.   Reading old dictations, the story is almost the same as a month or two ago…drinking a gallon of whiskey a day, stopped taking insulin, in ER with messed up metabolism.  I dictate almost an exact replica of the last H&P, start some fluids and insulin, and wait for labs.  My resident and I talk about just how many interns this same patient has taught how to manage DKA insulin, fluids, and labs…and I get frustrated and depressed.  One guy, refusing to take his insulin, drinking, and lost in the world has a bill of probably over $50 million for ER visits, ICU admissions for DKA and insulin drip management, attempted inpatient alcohol treatments, and medications.

We managed to reverse his DKA over the course of a few hours in the ER, preventing the use of an ICU bed.  He denied any help with his alcohol use and we sent him on his way after a meal.  I would go on to take care of him about a week later in the ER, with the same problem again.  I wonder if every new intern will have a chance to learn to manage DKA with this “frequent flier?”

There are many other stories of the “frequent fliers” of Cottage, teaching interns to treat DKA, endocarditis, alcohol withdrawl, etc.  From my first month I can recall a few special patients.  There was the man with no colon and only some small intestine left who enjoys milk so much that he drinks 120 oz of it each day.  Nevermind that this causes his GI tract to flow like Niagara Falls into his ostomy bag, severely dehydrating him and pickling his body.  Best part is, he refuses to learn to change his ostomy bag or stop the milk because he just loves Cottage living so damn much!  I did learn to work up chronic diarrhea, and my “frequent flier” made a new friend…

Frequent fliers are the perfect example of the system’s reactive approach to healthcare.   The same problems are solved over and over again. However, what I’ve learned is that the reactive nature of healthcare in the US is not always the fault of the system, but it is what the patient population demands in many instances.  Until we find a way to motivate, alter behavior, and bend will, the healthcare system must react to the decisions, however harmful, of the patient’s we aim to treat.

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Ward Month 1 Complete (Part One)

I’ve finished the first month of internship and I think I ascended the major portion of the learning curve.  Half the battle was learning the system; how to fill out the orders, notes, dictations, etc.  I had a great experience and really enjoyed the team I worked with.

In my program, teams include two interns and two seniors (2nd or 3rd years).  The schedule is rigged so that you admit new patients pretty much every other day with an overnight shift and a long call shift (7am-9pm) every 6th day.  I had good days, horrible days, and mostly a mix between the two.  The one horrible day involved being on “short” call, where you take the new admissions from 730am until 230pm.  Somehow, I managed to “cap,” getting 5 new admissions in that window.  So much for “short.”  However, despite 80 hour weeks, I still got out and enjoyed Santa Barbara to the best of my ability and have established some “go to” hot spots.

I’d like to document some of the experiences from the first month of wards that had an impact on me, for one reason or another…

First, I realized I was spoiled by the electronic medical records (EMRs) available in Minnesota.  Though none of the systems I’ve used at Fairview, Park Nicollet, HealthPartners, or Abbott, including the Epic “Solution,” are user-friendly and an ideal solution; but writing notes and ordering things by hand is horrible.  The typical admission involves going through the vitals and old dictations on the computer, then seeing the patient and taking scratch notes while they talk with you, moving on to writing a History & Physical note on green paper, then writing admission orders on white paper, finally ending by dictating the note you just wrote from the green paper into the telephone to some service located who knows where.  So many steps…so much inefficiency, it drives me nuts.

I’ve honed my process so that I take my memory and notes from talking with the patients directly to the phone, do a “stat” dictation, then print that out instead of chicken scratching onto the green paper.  I think I’m going to work on photocopying some generic, standard orders that I can use on multiple admissions in the future as well.

Most EMRs, let you set up standard H&P’s that basically write themselves, incorporating medications, past medical history, and any other data already in the chart.  All with no need for dictation.  I guess this is good and bad…some of those digital H&P’s can get pretty skimpy on actual substance with Epic “blowing-in” pure worthlessness.  It continues to boggle my mind that I can go to a friend’s Facebook page and within 1 minute figure out what they had for dinner, who they’re dating, where they currently live, the music they’re listening to, etc. but we can’t get a solid EMR that presents data in a way doctors need and want.  Something has got to give….IT will set us free.

This is already long…now with more time to post, I’m going to break it up into two parts.

Up next…”Frequent Fliers,” “look and you will find,” and Santa Barbara hot spots…

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Combating ALS with Patients’ Own Bone Marrow

BrainStorm Cell Therapeutics, an Israeli company formed around technology developed at Tel Aviv University, has entered into an agreement with Massachusetts General Hospital (MGH) and the University of Massachusetts Medical School (UMMS) to test their NurOwn product in clinical trials for the treatment of Amyotrophic Lateral Sclerosis (ALS).

NurOwn, which was granted FDA Orphan Drug status, involves putting patients’ own bone marrow through a proprietary process that drives the differentiation of the marrow cells into unique nerve-supporting cells that secrete factors responsible for neural system growth, repair, and survival.  One of those factors, Glial-Derived Neurotrophic Factor (GDNF), is thought to be extremely important in the pathophysiology and potential treatment of ALS, also known as Lou Gehrig’s disease.

ALS is a progressive, fatal disease characterized by motor neuron loss without an identifiable cause.  It is hypothesized that a lack of neuronal support factors leads to the “dying back” of neurons and subsequent loss of motor function for patients.  BrainStorm believes that once marrow mesenchymal cells complete the NurOwn processing, the now-differentiated glial cells will secrete protective factors such as GDNF and Brain-Derived Neurotrophic Factor (BDNF) that could ameliorate or even cure the disease.

Dr. Robert Brown, the professor of neurology known for discovering the first gene linked to familial ALS who will be leading the trials at UMMS, stated: “Professor Cudkowicz (MGH) and I are delighted to join forces with BrainStorm to prepare for BrainStorm’s first human clinical trials in the United States. We are hopeful that together we may achieve a breakthrough for the treatment of people suffering from ALS. This trial will be conducted after receiving all necessary FDA approvals and in parallel with the human clinical trials that are being conducted by BrainStorm in Israel in collaboration with the Hadassah Medical Center.”

Despite several companies attempting to create nerve-supporting cells that secrete GDNF and other neurotrophic compounds, BrainStorm is among the first to do so without the need for fetal or embryonic stem cells and without including genetic engineering steps that may increase the risk of cancer in treated patients because of an unstable genome.

The NurOwn process may also be leveraged towards treatment of other debilitating and fatal neurologic diseases such as Parkinson ’s disease, Huntington ’s disease, and Alzheimer’s Dementia.  You can learn more by viewing Rasheda Ali, an advisor to BrainStorm and daughter of Muhammed Ali, speaking about the potential of BrainStorm’s technology here.

UMMS Press Release:  UMMS, BrainStorm Cell to Collaborate on ALS Trial

BrainStorm Press Release: BrainStorm Signs MOU for Collaboration

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Home Sweet Home

After starting my very first day as an intern yesterday, on the overnight shift, I’m still in one piece.  I had some time today to give a little picture tour around my new home in Santa Barbara.  Enjoy…

I was lucky enough to land a guest house in the Hope Ranch neighborhood of Santa Barbara through Craigslist.  It’s about a 5 minute drive to the hospital where I’m working and a short walk to Hendry’s Beach. My landlords are so great and they have been the biggest help in moving out here.

To start things out, I am always greeted by two new friends, Skylee and Cabo.  You get to guess who is who.

New Friends

The place is absolutely gorgeous.  I have a huge deck that looks out onto the ocean with a dining table and chairs for sitting outside.  The inside is a nice sized studio with a great kitchen and one big room.  I’m slowly playing home-maker, and still am putting together my new standing desk.


Room


My guest house is surrounded by so many cool things.  I have 4 chickens in a coop behind the house, a pomegranate tree out my door, and a garden full of so many different kinds of fruits and vegetables I can’t even keep up with it.  I’ve eaten Loquats, Afghani fruit, cherimoya, and endless zucchini so far.  Not to mention fresh eggs daily.  Here’s some pictures of the property.

The Coop
Garden

The real kicker has been the back of the property where I’ve taken in my share of CA sun.

Entrance
Pool and Court
Center Court
Rooftop Nook
Entrance

After a day at the place, I like to walk the shoreline drive down to the harbor.  There is a great place, Brophy Bros., for happy hour with a view of the mountains, ocean, and boats.  The residents have been there a few times and it’s always fun.

Finally, the daily harvest. I’ve never ate so well…and for so cheap.  The bowl at the bottom right is full of afgahni berries, at least that is what my landlord calls them.  They are like a spiced blackberry and ridculously addicting.


So after my first night on the wards as an intern (completed!), I’m going to enjoy the place.  Love to hear from any readers, miss you guys back home in Minnesota.

More on the wards life to come…

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The Journey

So I’ve finally settled in since arriving in Santa Barbara.  The little Jetta was packed to the brim for the trek.  I said goodbye with a family sendoff from our Caribou in Edina on Sunday morning around 9am and drove until around midnight, stopping in Rock Springs, WY.  The day was really uneventful and I listened to some great audio books.  I was exhausted by the time I got to Rock Springs and I was happy to crash.

Anthony Bourdain’s Kitchen Confidential made the time pass really quickly.  I loved the book and it was interesting to see the many similarities between medical training and becoming a chef.  He really lets you know what it is like training to cook and made some thoughtful points.  One that stuck out was that for the majority of the people that prepare our food at restaurants, cooking is not an art but a craft.  I always viewed cooking as an art, mixing and matching flavors to hit all the taste buds.  However, he makes an important distinction, pointing out that the best line cooks can reliably pump out many, many meals each night without really thinking about the recipe given them.  Experimentation with flavors is discouraged for everyone but the executive chefs; the cooks can even lose their jobs for trying something fancy.

That really struck me because, as medical students, we always heard about the “art of medicine.”  Our  attending would make a unique care decision because of their gut instinct, chalking it up to this infamous “art.”  The patient id splendidly and the attending smiled at the team, winking, saying we all have more time until we’ve learned the “art.” Anyway, I realized how the current system and coming changes to the system, especially in primary care, will make the docs craftsmen instead of artists.  Not only that, it will penalize “art” much like they do in the food business. The sheer numbers of patients that are going to have to reside in the US system will ensure the need for “line cook” docs.

I’ve already seen it happening with Evidence-based medicine (EBM), emphasis on the BM.  Guidelines are drafted by a committee of 15 to 20 experts, the guidelines are then spewed to the line cooks, each happy to be paid for following the rules with each and every patient.  Just like most recipes are fine and fill you up no matter who prepared them, most guidelines get the job done.   But if only that doc had thought before prescribing that statin because your LDL was 141.  Or if the line cook just thought before initiating insulin therapy on every diabetic with a Hgb A1C >9.   Cookie cutter medicine/EBM/line cooking gets the numbers through, but man, we probably miss out on some masterpieces from thinking, “artist” docs in the form of significantly better lives for patients….
Anyway, Anthony Bourdain made for good thinking and an interesting listen on that first day.

I left around 9am the next morning and drove until midnight again, reaching San Jose, CA.  The day included a bs Nevada speeding ticket and a monster rock to the windshield.  Needless to say,  I fell into a dingy Motel 6 bed, woke up with bites all over my legs, showered, and got out of there.

I stopped to see my friend Ben in Palo Alto and was able to visit the Stanford Entrepreneurship Accelerator which was cool to see. I also stopped at my Aunt’s in Monterey on my way down to Santa Barbara.  Having been here for two days, it is goin to be a good year…

More to come on the amazing property I found through Craigslist, my new pets, and the guesthouse I’ve outfitted for the year…thanks for reading

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Blogging: Take Two

I love the idea of blogging….But I definitely crashed and burned with my first attempt. Last post March 23rd.  At least it was in 2011.

I have decided to give myself the benefit of the doubt, concluding that I set myself up to fail with too limited a scope.  I can’t contribute to a consistent nutrition blog.  Content was tough to come by and there were so many people who were more dedicated than me.  So I’ve decided to reform the blog into more of a stream of consciousness database that will document the start of my life as a medical resident in SoCal.

It’s a time of pretty big change for me.  I’m leaving my family, friends, and the place I’ve called home my whole life.  I’m excited/nervous, but I want to have a place to document the journey and let people follow along.  I hope to do a little nutrition, medical education, humor, tennis, radiology, and foodie life for everyone too.  In other words, it’ll be a reflection of me, my life, and what I care about….as best depicted through the interweb.

The journey starts tomorrow, 32 hour roadtrip from Minnesota to Cali.  I’ll let you know how it all starts off.

Please read, comment, ignore, whatever…I hope it’ll be better the second time around.

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Intermittent Feeding: Optimal Diet??

It’s been a bit crazy as the Match concluded.  I haven’t focused on posting with so much else going on.  But….

I saw a recent study today that warranted a short post, as it is about Intermittent Feeding (aka Intermittent Fasting, IF).  I am fascinated by IF because of how it can quickly change the metabolic environment in prediabetes and obese individuals.  In addition, a new study points out why IF might be better then traditional daily dieting.

“Intermittent versus daily calorie restriction: which diet regimen is more effective for weight loss” is a review article that looks at a variety of diet studies to evaluate the effectiveness of two methods of dieting.  The first method is traditional calorie restriction, limiting the total number of calories eaten each day anywhere from 15 to 60% of normal intake.  This was indirectly compared to IF, which is alternating days of eating as much as you want with days of eating nothing or very little (up to 25% of normal caloric intake).

The review study by Varady found that the two methods were equivalent in the amount of weight lost (in pounds).  The cool part was that the IF regimen preserved lean muscle mass much better than the traditional diet.  People on the traditional caloric restriction diet lost 75% of total weight lost is fat and lost 25% of the weight in fat-free muscle mass.  The IF dieters lost 90% of the weight from fat with only 10% of the weight loss coming from lean muscle mass.  This is incredibly important as the lean muscle mass makes up the majority of our basal metabolic rate (BMR).

BMR accounts for >80% of all calories burned every day and is colloquially called the “metabolism.”  So you can see how traditional dieting is almost shooting yourself in the foot, for every 10 pounds lost 2.5 of that is lean muscle mass.  With that lean muscle mass, BMR and “metabolism” drops, making you eat even less calories to loss weight further.  IF allows you to lose weight while maintaining BMR and metabolism.

In addition, people reported that it was “easier” to follow the IF diet and having a day to eat until full was better than tea-totalling each and every day.  I can agree that it is much easier for me mentally to just have one day to eat what I want and then take a day off.  It is much easier for me on diet days to know that I’m not eating rather than trying to eat only a little bit of something.  Finally, I think IF is in concordance with how our bodies and minds were made to think about food.  Humans and other omnivores were made to go periods without eating, hence the liver and gluconeogenesis.   I feel zeroed in and sharp on IF days and it helps me concentrate.

The authors do not suggest why IF may preserve lean muscle mass in the article.  I suggest it may be the action of glucagon, lipoprotein lipase, and the activation of glycogenolysis.  A 24 hour period will not put you in ketosis, burn muscle for fuel, or result in a significant cortisol spike.  I think a day without food is perfect for stressing the system just enough to put you back in metabolic homeostasis while honing insulin sensitivity.  In addition, the refeeding window that occurs every other day probably plays a large role in maintaining muscle mass because the calorie deficit is not constant, allowing the necessary repair/reload of muscular tissue to occur on the ad libitum feeding days.

I encourage everyone to try IF if you are trying to lose a little winter weight, I would be interested to hear if you find it easier than dieting on a daily basis.

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