March 17, 2014

Ketosis

What I actually eat, part III (circa Q1 2014)

Craving vegetables.

Read Time 10 minutes

This week I had dinner at a great steakhouse in New York with a very good friend.  Like any two “normal” guys after a long day, all we could talk about was science, and on this particular night the topic du jour was NAFLD (non-alcoholic fatty liver disease for the non-cognoscenti).  We ate, we drank, and we shook our heads in disbelief at the thought of 7 million children in the United States being afflicted with NAFLD.  In the next few years NAFLD will become the number one indication for liver transplantation (not a typo).

After dinner, my friend, who I dine with almost every time I’m in NYC, made a comment about how many vegetables and how much fruit I consumed.

I had the following: a chopped salad, tuna tartare, a 12 oz filet; and we split an order of sautéed onions, brussels sprouts, and a bowl of berries.

He asked, “How are you able to stay in ketosis with all of those carbs?” I responded, basically, that for the past few months I have not been consistently in ketosis, and when I am it’s only following a long bike ride where my BHB levels may get back into the 2-3 mM range. Most days, however, I live in the 0.3 to 0.8 mM range, depending on the time of day. (In my mind, to reap the benefits of nutritional ketosis, one probably needs to consistently be in the 1-3 mM range, and for some “applications” 3-4 mM is probably ideal.)

So what gives, you may be thinking. Is Peter Attia not Mr. Ketosis? Well, my friend suggested it might be time for another one of the dreaded what-do-I-eat posts.

Anyone who knows me or who has read this blog for a while will appreciate the fact that I loathe talking about what I eat. Why? Because, it unfortunately gets interpreted by many as what they should eat. It’s like asking me what exercises I do, and inferring you should do the same. It doesn’t make sense.  I have specific genetic factors, epigenetic alterations, and goals.  These factors coalesce to shape my behavior – how I exercise, what I eat, what I supplement.

A little backstory first

In September of last year, for my wife’s birthday, we went to our favorite restaurant in San Diego, where we live. The day before I emailed the owner and general manager, both friends, and asked for them to have one of our favorite off-menu items on hand (the best sushi in San Diego).  They happily obliged and asked which of their desserts my wife would most like.  I said something to the effect of: well, they are all great, so you pick.

The next evening, after eating more sushi and sashimi than I could imagine (I ate 3 platters myself), they brought out a platter with a full size serving of each of their signature SIX desserts, each with a lit candle.  We sang Happy Birthday, blew out the candles, and my daughter and wife, themselves already stuffed, proceeded to have a small forkful of each of the six desserts.  My daughter said, “Daddy, these are so yummy! Why don’t you have a bite?” To which my wife echoed, “Yea, they really are ridiculous…”

And in that instant, I made a decision. I did something I had not done in 4 years (to the month, actually). The decision was this: about 3 or 4 times a year (I opted for my wife’s and daughter’s birthdays, Thanksgiving, and maybe something else), I would – for one meal – eat whatever the hell I wanted.

In the next 15 minutes I devoured the remaining 4/5-ths of EACH of the six culinary masterpieces in front of me.  From cheesecake, to carrot cake, to decadent ice cream, and stuff I didn’t even recognize, I ate it.  In an instant I felt both wonderful and horrible.  The look on my wife’s and daughter’s faces – alone – was worth it. Their jaws on the table the whole time. The taste was beyond what I remembered (actually, much sweeter than I remembered, probably because when you don’t eat sugar for 4 years, well, you know).

I could barely get up from the table. That night, when we got home, I had a horrible headache. 1,000 mg of Tylenol and 2 glasses of water later, I still couldn’t sleep. I eventually got a few winks of sleep. The next day I felt hung over – a feeling I had not experienced since my 26th birthday. My fasting glucose was 126 mg/dL and BHB was 0.2 mM. Clearly I was out of ketosis.

I decided to go out for a glycogen-depleting workout (multiple sets of 3 min all out intervals on the bike) and about 36 hours later, after resuming my normal diet, I was right back into ketosis and felt just fine.  I told my wife I was going to repeat this experience on Thanksgiving. As such, and despite how far in advance this was, I asked her to plan to make an extra bowl of my favorite Thanksgiving dish – candied sweet potatoes – baked sweet potatoes coated in melted marshmallows.

Thanksgiving came and went, and I repeated the same act of debauchery during the big feast. Sure enough, by the Sunday morning of Thanksgiving weekend, I felt back to my baseline.  I haven’t gone on a bender like that since, but I’m probably due for one.

I’m sure at least some of you are asking, “Does Peter still think sugar is metabolically deranging?” The answer is absolutely, at the levels it is consumed by most Americans.  If you want a refresher on my point of view on sugar, definitely give this post a re-read.

So what did I take away from this?

Somewhere between “every day” and “never” there is a tolerance I have developed to consume massive amounts of carbohydrates, and specifically sugar.  Now, there are two components to this: a purely physiologic one and a behavioral one (which I suspect is heavily influenced by my physiology).

Focusing just on the physiology, I would guess I could probably “tolerate” a binge like that every few weeks with little measurable or discernable adverse effect.  I won’t even attempt to argue whether it’s every 7 days, every 14 days, or every 30 days.  But, it’s probably somewhere in that vicinity.

What about the behavioral side? Well, I suspect there exists a different “frequency distribution function” that describes how often I could binge like this without resuming unhealthy eating habits in the long run.  If I had to guess, I think the threshold for recidivism is higher from the behavioral tipping point than it is for the physiologic one. In other words, habits matter. I can probably tolerate – physiologically – more sugar today than I can tolerate behaviorally.

One last point I’d be remiss to leave out. You should keep in mind that for a period of 4 years, my consumption of sugar (sucrose, HFCS, liquid fructose in the form of any beverage, etc.) has been less than about 5 grams per day.  The average American, depending on which stats you believe (I think they are all pretty weak), consumes somewhere in the neighborhood of 100 to 120 grams per day of sugar, NOT including the liquid fructose in juice!

So, I have to at least entertain the hypothesis that 4 years of avoiding sugar has been a sufficient enough period of time to offer me some sort of “metabolic reset.” Now, I have no intention of testing this. If I was once susceptible to insulin resistance, I’m pretty sure I will always be. But, an interesting Gedankenexperiment would have me going back to one of several different dietary patterns – vegan, but with no sugar; standard American diet with lots of sugar; modestly higher carb, but still sugar-restricted – all could offer insights into the physiology of adiposity and fuel partitioning in my metabolically reset condition. 

How has this shaped my current eating behavior?

Sometime early in the New Year, I started really craving more vegetables. I’ve always loved them. Even in ketosis I still ate one or two salads each day most days, but I was pretty restrictive about the quantity of vegetables that had much carbohydrate in them (e.g., tomatoes, carrots).  But now, I wanted even more.  Big heaping bowls of curry stir-fry. (I have to toot my horn on this one thing. I make a really good, creamy, spicy curry stir-fry.) I realized this would probably knock me out of ketosis, especially with the large amount of tofu I mix with it and the yogurt I use to make the sauce.

My lunchtime salads were getting bigger and bigger, and I was piling more and more “stuff” into them. Almost laughable by the standards of those around me.

And I noticed I was eating less meat. Not at all by “design,” but somehow by seemingly craving less.  It seemed an average week would have maybe 2 servings of red meat.  When a great steak is placed in front of me, believe me, I enjoy every bite, but I found I just wanted it less. I also started craving a bit more fruit, especially berries and even apples, the former I consumed in modest amounts in ketosis, the latter I did not at all. (Because I know someone will ask – do I think red meat is harmful? – the answer is no, I do not believe so. Certainly not based on evidence I’ve seen to date, including the recent story about protein. For those looking to brush up on the state of evidence implicating red meat, I’d recommend three posts – one I wrote many moons ago in response to one of the dozen epidemiology stories, one written by Chris Masterjohn in response to the TMAO data, and one recently by Zoe Harcombe in response to the protein epidemiology).

I don’t know what to make of this, of course, and it may be nothing at all, other than an evolution of preference. I’ve checked mineral levels in my body in search of a clue (none showed up). Maybe I’m over- or under-saturated in some key nutrient?

Now, since everyone seems to care how much carbohydrate I consume, here is my current framework.  I put carbohydrates into 5 essentially MECE categories:

  1. Those I consume daily – mostly salad stuff and other vegetables; about twice a week I make a curry stir fry with tofu, for example.
  2. Those I consume often – nuts, berries, almond butter (which I just spoon out of the jar), super starch (both as a meal replacement and post-workout drink).
  3. Those I consume intermittently – a couple spoons of rice here and there, especially when I make Indian food or when we have sushi; a piece of baked potato when it looks particularly appetizing. If my daughter “makes” spaghetti, which she loves, I’ll usually have a forkful to remind her that her dad is not a complete freak.
  4. Those I consume only on very special occasions – exceptional desserts, for example – about 2 or 3 times a year, like the ones I consumed on my wife’s birthday, or the candied yams. (NB: One thing I decided in an instant – if I’m going on a bender, it’s not going to be for “average” dessert like some lame birthday cake; it’s got to be best in class.)
  5. Those I still completely refrain from – I call these the “cheap” carbs – basically all else (including cookies, potato chips, cereals, and the candy bars they keep handing me on this flight as I type this), including any liquid form of fructose, such as juice or sports drinks.

Below is a “typical” 5 days of eating over the past few months. Keep in mind, I virtually never consume breakfast, maybe once a month (e.g., if I have a breakfast meeting). Essentially, I do all of my exercise (current routine, below) in a fasted state only consuming the BioSteel’s high performance sports drink (HPSD), which contains virtually no calories – maybe 8 kcal of BCAA per serving.  So, despite the dietary changes I’ve made, and the fact that I’m not in ketosis most of the time, I remain seemingly well fat adapted, though RQ is a bit higher than before.

I should point out that I spend much less time exercising than I have historically, due to time constraints. But, I still aim for the following schedule, which is interrupted by travel during at least 2 or 3 weeks each month. The schedule below amounts to about 14 to 16 hours per week of training.

Monday – high intensity lift, followed by swim

Tuesday – ride (tempo)

Wednesday – swim

Thursday – ride (TT practice or threshold)

Friday – high intensity lift

Saturday – ride (VO2 max intervals), followed by swim

Sunday – group ride or solo TT practice

I can’t believe I’m about to do this…I just have this horrible feeling someone is going to attempt to replicate this, bite-for-bite, for no good reason. Please refrain. Remember, this is what I eat because of how my body works.

Wednesday

Lunch – huge salad (bowl larger than my head) with romaine lettuce, kale, carrots, tomatoes, cucumbers, olives, mushrooms, chicken breast, 2 tbsp olive oil, 3 tbsp lemon juice, 1 tbsp white vinegar, 1 cup of almond slivers

Snack – a cup of macadamia nuts

Dinner – Another large salad, but no chicken or nuts in this one; 1 pound of salmon; bowl of berries to follow

Thursday

Lunch – huge salad (bowl larger than my head) with romaine lettuce, kale, carrots, tomatoes, cucumbers, olives, mushrooms, can of tuna, 2 tbsp olive oil, 3 tbsp lemon juice, 1 tbsp white vinegar, 1 cup of walnuts

Snack – 2 or 3 tbsp of almond butter (a zero sugar variety)

Dinner – Omelet made from 6 eggs (white + yellow), shredded cheddar, lots of other veggies; side of steamed broccoli in butter; 2 more spoons of almond butter after dinner

Friday

Lunch – same as Wednesday (I basically rotate salad back and forth about 3:1 in favor of chicken over tuna)

Snack – none

Dinner – Curry stir-fry containing tofu, carrots, broccoli, bell peppers, mushrooms, zucchini, and squash, in a sauce made from curry paste and Greek yogurt.  I typically consume two heaping plates of this.

Saturday (post ride and swim)

Lunch – 7 hardboiled eggs, an avocado, 2 oz of cheese

Snack – a Fuji apple covered in almond butter

Dinner – 8 oz of steak (fillet, rib-eye, or tri-tip), 8 oz of salmon, large salad (sans meat and nuts, which I only do with lunch salads).

Sunday (post longer ride)

Lunch – The “Peter Kaufman” super starch shake (heavy cream, zero-sugar almond milk, a package of chocolate super starch, 2 tbsp of almond butter, an extra 20 g of Biosteel whey protein, frozen strawberries, ice – blend to a thick shake); I’ll drink 2 liters of this. Literally.

Snack – none

Dinner – Family sushi night! I’ll have a seaweed salad or two, huge platter of sashimi, California roll, and another specialty roll.

Lastly, because I know someone will ask, the few times I now take to measure, record, and tabulate exactly what I consume, it works out to about 3,500 kcal per day.  But some days, especially when I travel, it can be as low as 2,000 kcal when I only consume one meal per day (dinner). Other days it can be as high as 5,000 kcal. But, 3,300 to 3,600 kcal per day is the typical range. 

So, there you have it – the most irrelevant information you’re likely to find on this blog (except for what’s below… this is actually valuable stuff!)

Fashion tip of the month

While in NYC I realized – about 15 minutes before leaving my hotel for a very important meeting – that I had forgotten to bring cufflinks. My heart sank. I’ve never made this mistake before. I immediately realized why.  While packing, and just about as I was going to grab a set, my phone rang and I was distracted.  But that was neither here nor there. What was I going to do?  I didn’t have time to buy a new set, and the hotel concierge didn’t have a set to lend me, so I grabbed some dental floss and tied the cuffs of my shirt together using precise surgical knots.  I was pretty self-conscious that someone would notice and ask or comment, especially on a day stacked with so many back-to-back important meetings. Amazingly, no one said anything, though I could see some people looking at them and doing the double-take. Over that lovely steak dinner I alluded to at the top of this post, I told this story to my friend (who snapped the picture, below).  His response?  “Yea, I noticed it right away. I thought it was a new style. Very cool, actually. Kind of European.” So there you have it.  Don’t say I never shared anything of value on this blog.

Photo by Toa Heftiba on Unsplash

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728 Comments

  1. As usual very interesting. Not wanting to copy your entire week but wondering….

    Would you share you Curry stir-fry recipe?

    Love the blog!

  2. Peter,

    Long time listener, first time caller…

    Couple of questions:
    1) Is there any research/papers that describe the rate of ketone & glucose decay after exercise? As an example, I finished a 300k bike ride with ketones/glucose readings of 3.3 mmol/L & 71mg/dL, but 12 hours later the readings were 0.7 mmol/L & 102 mg/dL. The only thing I ate between the readings was 3 oz cashews, 1 quest bar & 20 oz diet Mt. Dew.

    2) Since I think of nutritional ketosis as a tool in a tool box, Is there any research/papers that quantify the ranges of NT and the associated time cost for getting back into NT once you’re no longer in NT (nice graphs that show time since in NT vs the time to get back into NT). For example, Dr. Phinney states 0.5 mmol/L as start of NT, but you’re more stringent on your definition. Also, Dr. Phinney stated that leaving NT would likely cost 1 week to get back into NT. But you currently think it would take about a month-ish and previously it took you 2 days to get back to NT.

    Thanks

    • Grant, surprising results given such little intake. I’ve done similar things many times and I experience the opposite — BHB goes up and up. I could speculate all day what was different in your case, but it would be just that.
      Not sure what NT is, but if you mean NK, I think 0.5 mM is the beginning of “flirting” with NK. The real changes in metabolism don’t seem to occur until you’re consistently in the 1 to 2 mM range (AM fasting level — levels throughout the day will fluctuate by intake and activity). The in and out situation is very complicated and depends on how adapted you were to begin with. Too long to explain in comment section.

    • Peter, This typical dose/response for me. I’ll do intervals, or long hilly rides get my ketones up, but the next morning, they’re back down. C’est la vie. I wasn’t looking for you to explain it to me, but only if you knew of any papers that might bring some insights. Not that you couldn’t explain it, but that behavior doesn’t scale well…

      Thanks for the time you put into the blog, and into getting NUSI. Hopefully, you’ll either get to answer alot of these questions, or you’ll fund the answers. Which does scale well, and that’s a good thing.

  3. Hi Peter,

    Your reticence in regards to these type of posts is understandble. Somewhere on this world someone is copying this 1 on 1, no doubt about it. But for every one of them at least 10 others probably find their own way, only using your post for some new tips, tricks (and not just nutritional ones apparently!) and adjustments.

    I am not in NK. Right now, as a student, I found this to influence my social life to much for my tast (I might go NK again someday though). But I do use some of your tips, changing my meals for the better. Not everyone is a sheep. Besides.. as long as they are happy with it, why bother? 🙂

    What I would like to see though is a guiding post on helping us finding our own way in the nutritional research. Where to start, what to mind (as you already pointed out in one of your previous posts), etc. If you really loath these What I Actually Eat posts, why not help us find our own way in literature?

    • Thank you for your response Peter! I’ve read all of your posts and they do help me out a lot. I can understand this has no further priority, but I do wonder through what channels you keep yourself updated on the latest articles. I mean I assume there isn’t some sort of a RSS feed or is there? 😉

  4. As far as I can tell, it looks like you should still remain in ketosis the majority of the time if you time your carb intake like you do, yes? Well, that’s what I could gather based off your blog post redgarding the coexistance of ketones and carbohydrates.

  5. Any information that you have found on the effects on TNF (Tumor necrosis factors)

    Thank you

  6. Insulin Over-Sensitivity
    Is it possible to be overly sensitive to Insulin ? – : those mechanisms that store injested fat reacting to strongly to Insulin ?

    If so – this would present somewhat of a double edged sword – excess carbs and perhaps Insulin resistance producing excess Insulin and a condition of injested fat being overly-sensitive to this Insulin produced – regarding those mechanisms that store injested fat

    If this is correct – a low carb diet would certainly improve things but result in a body weight set point far higher than ideal because of even normal or small Insulin amounts affecting those overly-sensitve to Insulin in regards to those mechanisms – that store injested fat

    If so – this would require that all three macronutrients be carefully controlled to acheive a decent body composition

    In such a person there would be a tendency of eating slightly to many carbs in relation to fat intake

    The over-sensitivty to Insulin in those mechanisms that store injested fat driving or forcing the process

    • Good question, Jeff, and it really illustrates the elephant in the room: what the hell does insulin resistance *really* mean? I’ll explore in the post on this topic.

    • Very good question Jeff indeed. It got me thinking: in lean people who tolerate carbs very well, is it possible that their fat cells are actually resistant to insulin? In obese, is their insulin too sensitive with regards to carbs? Is insulin the key factor in deciding whether to store energy as fat or oxidize it? Is it the amount of insulin secreted which is the problem or its sensitivity or resistance to food and different cells? Apart from carbs/protein what other things could be affecting insulin?

    • Hi,
      I don’t understand the question. Does not “insuline sensitive” mean that you need LESS insuline released in your body to achieve the same effect? Otherwise I just found I understand nothing about insuline resistance/sentivity.

    • Yes, what does insulin resistance really mean, and what does insulin sensitivity really mean? I think, as with all things physiologic, one has to place desired outcomes in the context of the state variables of the person we’re talking about – older, diabetic, competitive athlete etc. When we speak about improving insulin sensitivity in someone with MetSyn, for example, do we really want to increase whole body insulin sensitivity (that is to say, fat and muscle), or just increase muscle sensitivity? And if we want to do just the later, which I think we’d probably all agree we do, then are diabetic medications more of a problem than a help? There’s the whole relative nature of what resistance or sensitivity means in a person who’s healthy and one who’s not, which can be confusing I think. I also believe it’s a similar confusion in terminology when we speak of sensitivity and resistance for leptin.

  7. Hi Peter,

    I have been reading about NK and trying different things in myself to see how I feel and what happens. I had some blood work done to check out all of my markers and Cholesterol, HDL and LDL all cameback within optimal markers. Yet, the BUN was higher than desired and the BUN to- Creatine ratio came back higher. I Have been adhering to less than 50mg of carbs per day since the end of Oct, have lost some weight, about 12 lbs and about 5% of bf, from 32% total bf. I have also kept strictly to no more than 10mg of sugar a day, yet my fasting glucose level came back at 99 and my triglycirides at 39. My Dr suggests that I up my sugar and or carb intake bc those levels of triglycirirdes could be harmful after a certain time.
    I also had what I consider a “fainting” spell and felt Like was I was going to faint and pass out. I am not looking for a diagnosis, but would be helpful if you could give me your opinion on what is happeing with triglycirides. I have since increased my fat intake, even more, and carbs to 100g. Thank you.

  8. Hallo Peter,

    what data are you using as benchmark for your oral glucose tolerance test (OGTT)?
    I bought a Glucose/Ketone-meter and a ready made 75g Glc solution and performed an OGTT.

    However most of the reference values are for venous blood rather than capillary blood. I just found out that venous blood and capillary blood are not comparable (sometimes lower, sometimes higher values https://www.ncbi.nlm.nih.gov/pubmed/14632723). My values are way below the WHO Diabetes and IGT anyway, but I would be interested to see if there is some benchmark for healthy people.

    When it comes down to “non-diabetic subjects” this paper (https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2430037/) is the best which I found. Intrestingly it shows that increased blood-glucose levels after 40 min are irrelevant to mortality (RR = 1,0), but fasting ( RR = 1,34 ) and 2h ( RR = 1,22 ) are highly correlated with increased mortality. I mean a relative risk of 20-30% per “increased Glucose (mmol / L)” is similar to smoking and lung cancer. Anyway, my question number two:

    Since the most meaningful value is the fasting glucose, does it relly make sense to perfrom an OGTT?
    I mean 75g of sugar is quite some stress for the body and the result does not really matter, so why shouldn’t I just stick to fasting glucose measurement?

    Thank you so much for your blog, and thanks in advance for the answer,
    kind regards from Germany,
    Maximilian

    • hi maximillian,

      have you been able to find the post on measuring insulin resistance? i cannot.

      you question is very insightful. i know of coaches who are recommending people doing the test at home and this could cause issues with interpretation.

      i’m very interested in dr attia’s answer.

      thanks, eric

    • As an ex- hospital cientist and a newly diagnosed diabetic I am sort of qualified to answer this. My doctors focussed on requesting fasting bloo tests all the time. My fasting glucose remained “just normal” always until 2 months ago,when my specialist decided that I was an impaired fasting diabetic ( fasting Glucose 6.1 mmol/L). I was sent to the GP for management who said that I did not fit the guide lines for the government run diabetic program so he decided that i needed a OGTT to rule out diabetes as it will come out normal. Well guess what. Definitely not normal with sugar up to 14.4 mmol/L. This was totally missed with all the focus on fasting tests. Doctors need to request the occasional random test eg. yearly so they can diagnose properly. He was under the impression that I had no symptoms of diabetes but he had never asked. Pet favourite of mine is a GTT if you have raised triglycerides as they go hand in hand. Had one patient who was on tablets to lower trigs for 18 months and they didn’t work. I had to lie to the GP that I was doing research to save him ego when I rang up to explain the very high glucose level i got on the patient that he had not requested

  9. Hello Dr. Attia,

    First your complement: I have great admiration for what you have done/do and how you go about doing it. I appreciate your ability to be humble and change your opinion as the science evolves and leads you to different conclusions, this is not a perspective I have found in many doctors/clinicians. I have been reading various parts of your blog for several hours over the course of a week or so and want to make a change, however I have a few questions that I haven’t seen asked to you yet. Forgive me if you have already answered them and I didn’t discover them.

    1. Social Norms: One of the most difficult challenges I have found when I change my eating habits away from the “norm” is that it is very challenging to deal with the social aspect of eating differently than others. How do the logistics of your current eating habits work? (Does your family have a different meal from you at dinner, what do you eat if anything when you go to events like birthdays or parties where only one type of food is served?)

    2. The other 30-20%: In one of your posts (How can I lose weight) you stated that this approach works for 70 to 80 percent of people (i understand this is only an estimate). Is this due to physiological/genetic reasons or other circumstances where individuals cannot make it work in their lives? And if it were physiological/genetic, what would it look like when this approach is not working, would the results (weight loss, low TG, high HDL) be mediocre or non-existent?

    3. Evolution: From an evolutionary perspective, how do you view your current eating habits and those expressed on your blog? I would like to eat in a way (the proportions of fat, protein, carbs) that our ancestors ate for 190k + years, before McDonalds.

    4. Carb Continuum: I have viewed on your videos and read that your decrease of carbs has been on a continuum to where you are now, do you believe that it is possible to reverse the continuum slightly (increase carbs) and still maintain your current health outcomes (i understand that individuals will have different results based on their genes), or do these outcomes exist on a continuum that goes hand and hand? (ie. slight increase in carbs and/or sucrose will increase the various outcomes)

    Thank you for all of your positive work and research. As well as the time you take to answer questions.

  10. Reading your blog this week with fascination. I too am a doctor and have difficulty losing weight, despite being relatively fit and very active in a busy job treading the wards of a large hospital. Will ease myself into HFLC and see what transpires.

    Thank you for sharing your knowledge with us and summarising the literature, even though I cant understand all the chemistry! My question is: What is the effect of alcohol on insulin and why does alcohol reduce low blood sugar?

    • Depends on type of alcohol, so not a simple question. Dry red wine, for example, entirely different from beer, entirely different from vodka.

  11. Peter,
    How, and how often do you measure your blood BHB levels. As a corollary has that data given you a more complete picture of your own metabolic process? Thanks!

  12. Peter,

    Thank you for sharing your research, thoughts, and experiences on nutrition and training. I love the intensity and focus. Fair winds on your rides and smooth seas on your swims.

  13. Hi Dr. Attia,

    I would just like to say that it’s so refreshing to find a medical professional who understands the truth about cholesterol, saturated fat, carbs, etc., and yet doesn’t ‘jump on the bandwagon’ with regard to aspartame. Somewhere in your blog you speak the simple truth about this dipeptide, i.e, it’s harmless. I love your airplane analogy!

    As you know, so many integrative/holistic/alternative docs ( not to mention Mercola) make it out to be the most poisonous substance on earth. Case in point: I work with a functional med doc who, upon being asked by an obese patient with metabolic syndrome whether she should drink a can of diet pop or regular pop (because she absolutely had to have just one a day), the doc strongly recommeded the regular pop. Unbelievable!!

    While, for the most part, the food industry doesn’t have our health in their best interests, they got lucky with aspartame. If I discovered it, I would surely run with it! All these docs recommend gram quantites of individual aminos, but are frightened of miniscule amounts of aspartic acid and phenyalanine. Absolutely ridiculous!!

    Love your blog! I’m a new fan!!

    Regards,
    Bob Iafelice, MS, RD, LD

  14. Peter, I wonder if you are familiar with the carb cycling protocol(s) by John Kiefer and if you have specific opinions about it.

    What I find particularly interesting is that while Kiefer basically adocates ketogenic diet and agrees with Phinney and Volek that high-carb and chronically elevated insuline are bad things he claims that periodic insuline spikes are beneficial for health and fat loss.

    • There may be anywhere from some to complete truth to this. I just have no data to evaluate it, nor have done sufficient work with myself or my patients/clients to comment. Still an unknown to me, but certainly seems plausible and worth experimenting with. The drawback, vs sustained NK, is that you’ll give up many of the metabolic adaptations of long-term ketosis, such as extreme fat adaption. However, it’s not clear if one is only giving up, say, 10% of this benefit in exchange for a whole new world of benefits. Tricky, huh?

  15. Peter,

    Thanks for all your research and insight. It’s incredibly helpful! Do you think Red Blood Cell Distribution Width is a useful diagnostic marker for MetS? And if so, what’s a realistic range? Is this topic worth expanding or including other markers that relate directly to RBCDW.

    Thanks,
    Greg

    • I’m unfamiliar with this metric and more specifically, where and how it provides diagnostic clarity over the standard measurements. If you have a paper you particularly like, please post link.

  16. Peter,

    https://care.diabetesjournals.org/content/33/3/e40.full

    Not suggesting this is important, I’m just a layman, a patient trying to get well.

    Our local lab range is 11.5-14.5%. My recent result was 14.7 after 8 weeks of LCHF eating. My last 10 years has been 13.5-14.4, so below range. Which is like my fasting glucose, A1C, etc, just slightly below range or border line so no one pursued it, not for 10 years, ugh. Not sure if this means anything in relation to MetS. My Dr doesn’t seem very interested in MetS so I’m operating on my own. This nutrition strategy is solving a lot of issues for me, but I still have lots of joint pain, adding some magnesium now. But able to exercise again after 10 years, so I’ll take a little pain.

    No need to comment if this doesn’t mean anything.

    Thanks,
    Greg

  17. Every once in a while I’ll go out for an evening and drink ten to twelve beers, half a dozen shots of whiskey, and smoke a pack of reds. It’s cool tho, because I don’t do it very often, and even though I feel like absolute hell afterwards, I’m back to my usual self within a few days.

    Given lots of people drink and smoke a LOT more than this, it must be a sane and relatively healthy thing to do. In fact, looking at society in general, it would seem NOT sane to never drink or smoke! I mean, back in college I used to be surrounded with people who drank and smoked every day and I did the same and I was in pretty damn good shape back then!

    The real problem isn’t the binging itself, it’s the fact that these binges make me want to drink and smoke more often. But I’m not a raging carb– I mean, alcoholic, (even though many of the people I drink and smoke with are), I only do these things socially. So it’s all good!

  18. Peter, i have heard you state in one of your videos that fiber isn’t needed whereas Dr.Lustig puts a premium on fiber. Why the difference? Is it more of opinion and preference than facts? I am a huge fan of him like yourself.

    Thanks, E

  19. I keep wondering if it is good to stay in nk for long periods of time (after excess body fat is lost), if we evolved from hunter gathers who would have gone in and out of ketosis during the year?

  20. Great blog

    Even if the brainy stuff goes way over my head. Well at least it makes me stop and think.
    Your IHMC lecture on metabolic state is really interesting.

    I have gone Keto as last resort. I am fairly healthy – daily exercise and Mediterranean diet, no junk food, no refined sugar but my cholesterol is high, even the good one. My GP was ok with that, its the only thing “ wrong with me”, down to genetics ( heart attacks father’s side – digestive and liver cancers on mother’s) but now I am getting pressure to get statins. People on pills are much easier to manage it seems.

    I have had a couple of very stressful years and my waist line has expanded – just my waistline which I knew meant high cortisol ( it has happened before and got confirmed by my endocrinologist who follows me for hormonal problems). I am one of those people who cope but are only chilled when they are asleep ( I slept through a hurricane once) and grow fat when under stress ( like my dad). Nobody mentions Tai Chi to chill, I tried it – too slow for me. I must be the only fidgety person who manages to put on weight with the condition. I was told to lose visceral fat or my hormone imbalance would get worse.

    I decided not to do a high protein diet – I hate the sluggish way my body feels with too much meat and I am lactose intolerant. The first month of Keto was hell, hell, hell for me and my loved one, who is a mesomorph and bloody lives on pasta and race with no problems. I had brain fog and constipation, I was dead to the world by 9 pm. I moved to pooping green from all the green vegetables with coconut oil . Then something funny happened at the end of the first month – I noticed my elbows were as soft as a baby’s bottom – I don’t use body cream because of the crap in them.
    Once the head fog cleared, I realised I no longer had digestive problems ( a genetic thing as well that runs in my family ). Also, I am mentally alert when I wake up – very, very scary – I am making lists with my expresso these days as opposed to wait for the caffeine to hit me into life.

    One question – I am on my third month and need to have my cholesterol tested again, how long to I wait, 6 months ? Or until I can get into my 30 inch no-lycra jeans?

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