The Obesity Code – by Dr. Jason Fung
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Firstly, if you have already read Dr. Fung’s other book, The Diabetes Code, which we reviewed a little while ago, you can probably skip this one. It has mostly the same information, presented with a different focus.
While The Diabetes Code assumes you are diabetic, or prediabetic, or concerned about avoiding/reversing those conditions, The Obesity Code assumes you are obese, or heading in that direction, or otherwise are concerned about avoiding/reversing obesity.
What it’s not, though, is a weight loss book. Will it help if you want to lose weight? Yes, absolutely. But there is no talk here of weight loss goals, nor any motivational coaching, nor week-by-week plans, etc.
Instead, it’s more an informative textbook. With exactly the sort of philosophy we like here at 10almonds: putting information into people’s hands, so everyone can make the best decisions for themselves, rather than blindly following someone else’s program.
Dr. Fung explains why various dieting approaches don’t work, and how we can work around such things as our genetics, as well as most external factors except for poverty. He also talks us through how to change our body’s insulin response, and get our body working more like a lean machine and less like a larder for hard times.
Bottom line: this is a no-frills explanation of why your body does what it does when it comes to fat storage, and how to make it behave differently about that.
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Eat To Beat Chronic Fatigue!
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How To Eat To Beat Chronic Fatigue
Chronic fatigue is on the rise, and it can make life a living Hell. Days blur into one, and you try to take each day as it comes, but sometimes several days gang up on you at once.
You probably know some lifestyle changes that might help—if only you had the energy to implement them.
You’d like to eat well, but you need to…
- Buy the fresh produce (and take a little rest after)
- Put the groceries away (and take a little rest after)
- Wash the vegetables (and take a little rest after)
- Chop the things as necessary (and take a little rest after)
- Cook dinner (and take a little rest after)
…and now you’re too exhausted to eat it.
So, what can be done?
First, avoid things that cause inflammation, as this is a major contributor to chronic fatigue. You might like our previous main feature:
Next up, really do stay hydrated. It’s less about quantity, and more about ubiquity. Hydrate often.
Best is if you always have some (hydrating) drink on the go.
Do experiment with your diet, and/but keep a food journal of what you eat and how you feel 30–60 minutes after eating it. Only make one change at a time, otherwise you won’t know which change made the difference.
Notice what patterns emerge over time, and adjust your ingredients accordingly.
Limit your caffeine intake. We know that sometimes it seems like the only way to get through the day, but you will always crash later, because it was only ever taxing your adrenal system (thus: making you more tired in the long run) and pulling the wool over the eyes of your adenosine receptors (blocking you from feeling how tired you are, but not actually reducing your body’s tiredness).
Put simply, caffeine is the “payday loan” of energy.
Eat more non-starchy vegetables, and enjoy healthy fats. Those healthy fats can come from nuts and seeds, avocado, or fish (not fried, though!).
The non-starchy vegetables will boost your vitamins and fiber while being easy on your beleaguered metabolism, while the healthy fats will perk up your energy levels without spiking insulin like sugars would.
Pay the fatigue tax up front. What this means is… Instead of throwing away vegetables that didn’t get used because it would take too much effort and you just need an easier dinner today, buy ready-chopped vegetables, for example.
And if you buy vegetables frozen, they’re also often not only cheaper, but also (counterintuitively) contain more nutrients.
A note of distinction:
Many more people have chronic fatigue (the symptom: being exhausted all the time) than have chronic fatigue syndrome (the illness: myalgic encephalomyelitis).
This is because fatigue can be a symptom of many, many other conditions, and can be heavily influenced by lifestyle factors too.
A lot of the advice for dealing with chronic fatigue is often the same in both cases, but some will be different, because for example:
- If your fatigue is from some other condition, that condition probably impacts what lifestyle factors you are (and are not) able to change, too
- If your fatigue is from lifestyle factors, that hopefully means you can change those and enjoy less fatigue…
- But if it’s not from lifestyle factors, as in ME/CFS, then advice to “exercise more” etc is not going to help so much.
There are ways to know the difference though:
Check out: Do You Have Chronic Fatigue Syndrome?
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Sleep Tracking, For Five Million Nights
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5 Sleep Phenotypes, By Actual Science
You probably know people can be broadly divided into “early birds” and “night owls”:
Early Bird Or Night Owl? Genes vs Environment
…and then the term “hummingbird” gets used for a person who flits between the two.
That’s three animals so far. If you read a book we reviewed recently, specifically this one:
The Power of When – by Dr. Michael Breus
…then you may have used the guide within to self-diagnose your circadian rhythm type (chronotype) according to Dr. Breus’s system, which divides people into bears, lions, wolves, and dolphins.
That’s another four animals. If you have a FitBit, it can “diagnose” you with being those and/or a menagerie of others, such as giraffe, hedgehog, parrot, and tortoise:
How Fitbit Developed the Sleep Profile Experience (Part 2 – Sleep Animals)
Five million nights
A team of researchers recently took a step away from this veritable zoo of 11 different animals and counting, and used a sophisticated modelling system to create a spatial-temporal map of people’s sleep habits, and this map created five main “islands” that people’s sleep habits could settle on, or sometimes move from island to island.
Those “five million nights” by the way? It was actually 5,095,798 nights! You might notice that would take from the 2020s to the 15970s to complete, so this was rather a matter of monitoring 33,152 individuals between January and October of the same year. Between them, they got those 5,095,798 nights of sleep (or in some cases, nights of little or no sleep, but still, they were there for the nights).
The five main phenotypes that the researchers found were:
- What we think of as “normal” sleep. In this phenotype, people get about eight hours of uninterrupted sleep for at least six days in a row.
- As above for half the nights, but they only sleep for short periods of time in bouts of less than three hours the other half.
- As per normal sleep, but with one interrupted night per week, consisting of a 5 hour sleep period and then broken sleep for a few more hours.
- As per normal sleep generally, but with occasional nights in which long bouts of sleep are separated by a mid-sleep waking.
- Sleeping for very short periods of time every night. This phenotype was the rarest the researchers found, and represents extremely disrupted sleep.
As you might suspect, phenotype 1 is healthier than phenotype 5. But that’s not hugely informational, as the correlation between getting good sleep and having good health is well-established. So, what did the study teach us?
❝We found that little changes in sleep quality helped us identify health risks. Those little changes wouldn’t show up on an average night, or on a questionnaire, so it really shows how wearables help us detect risks that would otherwise be missed.❞
More specifically,
❝We found that the little differences in how sleep disruptions occur can tell us a lot. Even if these instances are rare, their frequency is also telling. So it’s not just whether you sleep well or not – it’s the patterns of sleep over time where the key info hides❞
…and, which gets to the absolute point,
❝If you imagine there’s a landscape of sleep types, then it’s less about where you tend to live on that landscape, and more about how often you leave that area❞
In other words: if your sleep pattern is not ideal, that’s one thing and it’d probably be good to address it, by improving your sleep. However, if your sleep pattern changes phenotype without an obvious known reason why, this may be considered an alarm bell warning of something else that needs addressing, which may be an underlying illness or condition—meaning it can be worthwhile being a little extra vigilant when it comes to regular health screenings, in case something new has appeared.
Want to read more?
You can read the paper in full here:
Five million nights: temporal dynamics in human sleep phenotypes
Take care!
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Non-Sleep Deep Rest: A Neurobiologist’s Take
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How to get many benefits of sleep, while awake!
Today we’re talking about Dr. Andrew Huberman, a neuroscientist and professor in the department of neurobiology at Stanford School of Medicine.
He’s also a popular podcaster, and as his Wikipedia page notes:
❝In episodes lasting several hours, Huberman talks about the state of research in a specific topic, both within and outside his specialty❞
Today, we won’t be taking hours, and we will be taking notes from within his field of specialty (neurobiology). Specifically, in this case:
Non-Sleep Deep Rest (NSDR)
What is it? To quote from his own dedicated site on the topic:
❝What is NSDR (Yoga Nidra)? Non-Sleep Deep Rest, also known as NSDR, is a method of deep relaxation developed by Dr. Andrew Huberman, a neuroscientist at Stanford University School of Medicine.
It’s a process that combines controlled breathing and detailed body scanning to bring you into a state of heightened awareness and profound relaxation. The main purpose of NSDR is to reduce stress, enhance focus, and improve overall well-being.❞
While it seems a bit bold of Dr. Huberman to claim that he developed yoga nidra, it is nevertheless reassuring to get a neurobiologist’s view on this:
How it works, by science
Dr. Huberman says that by monitoring EEG readings during NSDR, we can see how the brain slows down. Measurably!
- It goes from an active beta range of 13–30 Hz (normal waking) to a conscious meditation state of an alpha range of 8–13 Hz.
- However, with practice, it can drop further, into a theta range of 4–8 Hz.
- Ultimately, sustained SSDR practice can get us to 0.5–3 Hz.
This means that the brain is functioning in the delta range, something that typically only occurs during our deepest sleep.
You may be wondering: why is delta lower than theta? That’s not how I remember the Greek alphabet being ordered!
Indeed, while the Greek alphabet goes alpha beta gamma delta epsilon zeta eta theta (and so on), the brainwave frequency bands are:
- Gamma = concentrated focus, >30 Hz
- Beta = normal waking, 13–30 Hz
- Alpha = relaxed state, 8–13 Hz
- Theta = light sleep, 4–8 Hz
- Delta = deep sleep, 1–4 Hz
Source: Sleep Foundation ← with a nice infographic there too
NSDR uses somatic cues to engage our parasympathetic nervous system, which in turn enables us to reach those states. The steps are simple:
- Pick a time and place when you won’t be disturbed
- Lie on your back and make yourself comfortable
- Close your eyes as soon as you wish, and now that you’ve closed them, imagine closing them again. And again.
- Slowly bring your attention to each part of your body in turn, from head to toe. As your attention goes to each part, allow it to relax more.
- If you wish, you can repeat this process for another wave, or even a third.
- Find yourself well-rested!
Note: this engagement of the parasympathetic nervous system and slowing down of brain activity accesses restorative states not normally available while waking, but 10 minutes of NSDR will not replace 7–9 hours of sleep; nor will it give you the vital benefits of REM sleep specifically.
So: it’s an adjunct, not a replacement
Want to try it, but not sure where/how to start?
When you’re ready, let Dr. Huberman himself guide you through it in this shortish (10:49) soundtrack:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to try it, but not right now? Bookmark it for later
Take care!
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Healthy Relationship, Healthy Life
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Only One Kind Of Relationship Promotes Longevity This Much!
One of the well-established keys of a long healthy life is being in a fulfilling relationship. That’s not to say that one can’t be single and happy and fulfilled—one totally can. But statistically, those who live longest, do so in happy, fulfilling, committed relationships.
Note: happy, fulfilling, committed relationships. Less than that won’t do. Your insurance company might care about your marital status for its own sake, but your actual health doesn’t—it’s about the emotional safety and security that a good, healthy, happy, fulfilling relationship offers.
How to keep the “love coals” warm
When “new relationship energy” subsides and we’ve made our way hand-in-hand through the “honeymoon period”, what next? For many, a life of routine. And that’s not intrinsically bad—routine itself can be comforting! But for love to work, according to relational psychologists, it also needs something a little more.
What things? Let’s break it down…
Bids for connection—and responsiveness to same
There’s an oft-quoted story about a person who knew their marriage was over when their spouse wouldn’t come look at their tomatoes. That may seem overblown, but…
When we care about someone, we want to share our life with them. Not just in the sense of cohabitation and taxes, but in the sense of:
- Little moments of joy
- Things we learned
- Things we saw
- Things we did
…and there’s someone we’re first to go to share these things with. And when we do, that’s a “bid for connection”. It’s important that we:
- Make bids for connection frequently
- Respond appropriately to our partner’s bids for connection
Of course, we cannot always give everything our full attention. But whenever we can, we should show as much genuine interest as we can.
Keep asking the important questions
Not just “what shall we have for dinner?”, but:
- “What’s a life dream that you have at the moment?”
- “What are the most important things in life?”
- “What would you regret not doing, if you never got the chance?”
…and so forth. Even after many years with a partner, the answers can sometimes surprise us. Not because we don’t know our partners, but because the answers can change with time, and sometimes we can even surprise ourselves, if it’s a question we haven’t considered for a while.
It’s good to learn and grow like this together—and to keep doing so!
Express gratitude/appreciation
For the little things as well as the big:
- Thank you for staying by my side during life’s storms
- Thank you for bringing me a coffee
- Thank you for taking on these responsibilities with me
- I really appreciate your DIY skills
- I really appreciate your understanding nature
On which note…
Compliment, often and sincerely
Most importantly, compliment things intrinsic to their character, not just peripheral attributes like appearance, and also not just what they do for you.
- You’re such a patient person; I really admire that
- I really hit the jackpot to get someone I can trust so completely as you
- You are the kindest and sweetest soul I have ever encountered in life
- I love that you have such a blend of strength and compassion
- Your unwavering dedication to your personal values makes me so proud
…whatever goes for your partner and how you see them and what you love about them!
Express your needs, and ask about theirs
We’re none of us mind-readers, and it’s easy to languish in “if they really cared, I wouldn’t have to ask”, or conversely, “if they wanted something, they would surely say so”.
Communicate. Effectively. Life is too short to waste in miscommunication and unsaid things!
We covered much more detailed how-tos of this in a previous issue, but good double-whammy of top tier communication is:
- “I need…” / “Please will you…”
- “What do you need?” / “How can I help?”
Touch. Often.
It takes about 20 seconds of sustained contact for oxytocin to take effect, so remember that when you hug your partner, hold hands when walking, or cuddle up the sofa.
Have regular date nights
It doesn’t have to be fancy. A date night can be cooking together, it can be watching a movie together at home. It can be having a scheduled time to each bring a “big question” or five, from what we talked about above!
Most importantly: it’s a planned shared experience where the intent is to enjoy each other’s romantic company, and have a focus on each other. Having a regularly recurring date night, be it the last day of each month, or every second Saturday, or every Friday night, whatever your schedules allow, makes such a big difference to feel you are indeed “dating” and in the full flushes of love—not merely cohabiting pleasantly.
Want ideas?
Check out these:
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When BMI Doesn’t Measure Up
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When BMI Doesn’t Quite Measure Up
Last month, we did a “Friday Mythbusters” edition of 10almonds, tackling many of the misconceptions surrounding obesity. Amongst them, we took a brief look at the usefulness (or lack thereof) of the Body Mass Index (BMI) scale of weight-related health for individuals. By popular subscriber request, we’re now going to dive a little deeper into that today!
The wrong tool for the job
BMI was developed as a tool to look at large-scale demographic trends, stemming from a population study of white European men, who were for the purpose of the study (the widescale health of the working class in that geographic area in that era), considered a reasonable default demographic.
In other words: as a system, it’s now being used in a way it was never made for, and the results of that misappropriation of an epidemiological tool for individual health are predictably unhelpful.
If you want to know yours…
Here’s the magic formula for calculating your BMI:
- Metric: divide your weight in kilograms by your height in square meters
- Imperial: divide your weight in pounds by your height in square inches and then multiply by 703
“What if my height doesn’t come in square meters or square inches, because it’s a height, not an area?”
We know. Take your height and square it anyway. If this seems convoluted and arbitrary, yes, it is.
But!
While on the one hand it’s convoluted and arbitrary… On the other hand, it’s also a gross oversimplification. So, yay for the worst of both worlds?
If you don’t want to grab a calculator, here’s a quick online tool to calculate it for you.
So, how did you score?
According to the CDC, a BMI score…
- Under 18.5 is underweight
- 18.5 to 24.9 is normal
- 25 to 29.9 is overweight
- 30 and over is obese
And, if we’re looking at a representative sample of the population, where the representation is average white European men of working age, that’s not a bad general rule of thumb.
For the rest of us, not so representative
BMI is a great and accurate tool as a rule of thumb, except for…
Women
An easily forgotten demographic, due to being a mere 51% of the world’s population, women generally have a higher percentage of body fat than men, and this throws out BMI’s usefulness.
If pregnant or nursing
A much higher body weight and body fat percentage—note that these are two things, not one. Some of the extra weight will be fat to nourish the baby; some will be water weight, and if pregnant, some will be the baby (or babies!). BMI neither knows nor cares about any of these things. And, this is a big deal, because BMI gets used by healthcare providers to judge health risks and guide medical advice.
People under the age of 16 or over the age of 65
Not only do people below and above those ages (respectively) tend to be shorter—which throws out the calculations and mean health risks may increase before the BMI qualifies as overweight—but also:
- BMI under 23 in people over the age of 65 is associated with a higher health risk
- A meta-analysis showed that a BMI of 27 was the best in terms of decreased mortality risk for the over-65 age group
This obviously flies in the face of conventional standards regards BMI—as you’ll recall from the BMI brackets we listed above.
Read the science: BMI and all-cause mortality in older adults: a meta-analysis
Athletic people
A demographic often described in scientific literature as “athletes”, but that can be misleading. When we say “athletes”, what comes to mind? Probably Olympians, or other professional sportspeople.
But also athletic, when it comes to body composition, are such people as fitness enthusiasts and manual laborers. Which makes for a lot more people affected by this!
Athletic people tend to have more lean muscle mass (muscle weighs more than fat), and heavier bones (can’t build strong muscles on weak bones, so the bones get stronger too, which means denser)… But that lean muscle mass can actually increase metabolism and help ward off many of the very same things that BMI is used as a risk indicator for (e.g. heart disease, and diabetes). So people in this category will actually be at lower risk, while (by BMI) getting told they are at higher risk.
If not white
Physical characteristics of race can vary by more than skin color, relevant considerations in this case include, for example:
- Black people, on average, not only have more lean muscle mass and less fat than white people, but also, have completely different risk factors for diseases such as diabetes.
- Asian people, on average, are shorter than white people, and as such may see increased health risks before BMI qualifies as overweight.
- Hispanic people, on average, again have different physical characteristics that throw out the results, in a manner that would need lower cutoffs to be even as “useful” as it is for white people.
Further reading on this: BMI and the BIPOC Community
In summary:
If you’re an average white European working-age man, BMI can sometimes be a useful general guide. If however you fall into one or more of the above categories, it is likely to be inaccurate at best, if not outright telling the opposite of the truth.
What’s more useful, then?
For heart disease risk and diabetes risk both, waist circumference is a much more universally reliable indicator. And since those two things tend to affect a lot of other health risks, it becomes an excellent starting point for being aware of many aspects of health.
Pregnancy will still throw off waist circumference a little (measure below the bump, not around it!), but it will nevertheless be more helpful than BMI even then, as it becomes necessary to just increase the numbers a little, according to gestational month and any confounding factors e.g. twins, triplets, etc. Ask your obstetrician about this, as it’s beyond the scope of today’s newsletter!
As to what’s considered a risk:
- Waist circumference of more than 35 inches for women
- Waist circumference of more than 40 inches for men
These numbers are considered applicable across demographics of age, sex, ethnicity, and lifestyle.
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The Cold Truth About Respiratory Infections
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The Pathogens That Came In From The Cold
Yesterday, we asked you about your climate-themed policy for avoiding respiratory infections, and got the above-depicted, below-described, set of answers:
- About 46% of respondents said “Temperature has no bearing on infection risk”
- About 31% of respondents said “It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens”
- About 22% of respondents said “It’s important to stay warm to avoid getting colds, flu, etc”
Some gave rationales, including…
For “stay warm”:
❝Childhood lessons❞
For “get cold, fresh air”:
❝I just feel that it’s healthy to get fresh air daily. Whether it kills germs, I don’t know❞
For “temperature has no bearing”:
❝If climate issue affected respiratory infections, would people in the tropics suffer more than those in colder climates? Pollutants may affect respiratory infections, but I doubt just temperature would do so.❞
So, what does the science say?
It’s important to stay warm to avoid getting colds, flu, etc: True or False?
False, simply. Cold weather does increase the infection risk, but for reasons that a hat and scarf won’t protect you from. More on this later, but for now, let’s lay to rest the idea that bodily chilling will promote infection by cold, flu, etc.
In a small-ish but statistically significant study (n=180), it was found that…
❝There was no evidence that chilling caused any acute change in symptom scores❞
Read more: Acute cooling of the feet and the onset of common cold symptoms
Note: they do mention in their conclusion that chilling the feet “causes the onset of cold symptoms in about 10% of subjects who are chilled”, but the data does not support that conclusion, and the only clear indicator is that people who are more prone to colds generally, were more prone to getting a cold after a cold water footbath.
In other words, people who were more prone to colds remained more prone to colds, just the same.
It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens: True or False?
Broadly False, though most pathogens do have an optimal operating temperature that (for obvious reasons) is around normal human body temperature.
However, given that they don’t generally have to survive outside of a host body for long to get passed on, the fact that the pathogens may be a little sluggish in the great outdoors will not change the fact that they will be delighted by the climate in your respiratory tract as soon as you get back into the warm.
With regard to the cold air not being a reliable killer/inactivator of pathogens, we call to the witness stand…
Polar Bear Dies From Bird Flu As H5N1 Spreads Across Globe
(it was found near Utqiagvik, one of the northernmost communities in Alaska)
Because pathogens like human body temperature, raising the body temperature is a way to kill/inactivate them: True or False?
True! Unfortunately, it’s also a way to kill us. Because we, too, cannot survive for long above our normal body temperature.
So, for example, bundling up warmly and cranking up the heating won’t necessarily help, because:
- if the temperature is comfortable for you, it’s comfortable for the pathogen
- if the temperature is dangerous to the pathogen, it’s dangerous to you too
This is why the fever response evolved, and/but why many people with fevers die anyway. It’s the body’s way of playing chicken with the pathogen, challenging “guess which of us can survive this for longer!”
Temperature has no bearing on infection risk: True or False?
True and/or False, circumstantially. This one’s a little complex, but let’s break it down to the essentials.
- Temperature has no direct effect, for the reasons we outlined above
- Temperature is often related to humidity, which does have an effect
- Temperature does tend to influence human behavior (more time spent in open spaces with good ventilation vs more time spent in closed quarters with poor ventilation and/or recycled air), which has an obvious effect on transmission rates
The first one we covered, and the third one is self-evident, so let’s look at the second one:
Temperature is often related to humidity, which does have an effect
When the environmental temperature is warmer, water droplets in the air will tend to be bigger, and thus drop to the ground much more quickly.
When the environmental temperature is colder, water droplets in the air will tend to be smaller, and thus stay in the air for longer (along with any pathogens those water droplets may be carrying).
Some papers on the impact of this:
- Cold temperature and low humidity are associated with increased occurrence of respiratory tract infections
- A Decrease in Temperature and Humidity Precedes Human Rhinovirus Infections in a Cold Climate
So whatever temperature you like to keep your environment, humidity is a protective factor against respiratory infections, and dry air is a risk factor.
So, for example:
- If the weather doesn’t suit having good ventilation, a humidifier is a good option
- Being in an airplane is one of the worst places to be for this, outside of a hospital
Don’t have a humidifier? Here’s an example product on Amazon, but by all means shop around.
A crock pot with hot water in and the lid off is also a very workable workaround too
Take care!
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