Shedding Some Obesity Myths
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Let’s shed some obesity myths!
There are a lot of myths and misconceptions surrounding obesity… And then there are also reactive opposite myths and misconceptions, which can sometimes be just as harmful!
To tackle them all would take a book, but in classic 10almonds style, we’re going to put a spotlight on some of the ones that might make the biggest difference:
True or False: Obesity is genetically pre-determined
False… With caveats.
Some interesting results have been found from twin studies and adoption studies, showing that genes definitely play some role, but lifestyle is—for most people—the biggest factor:
- The body-mass index of twins who have been reared apart
- An adoption study of human obesity
- Using a sibling-adoption design to parse genetic and environmental influences on children’s body mass index
In short: genes predispose; they don’t predetermine. But that predisposition alone can make quite a big difference, if it in turn leads to different lifestyle factors.
But upon seeing those papers centering BMI, let’s consider…
True or False: BMI is a good, accurate measure of health in the context of bodyweight
False… Unless you’re a very large group of thin white men of moderate height, which was the demographic the system was built around.
Bonus information: it was never intended to be used to measure the weight-related health of any individual (not even an individual thin white man of moderate height), but rather, as a tool to look at large-scale demographic trends.
Basically, as a system, it’s 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.
To do a deep-dive into all the flaws of the BMI system, which are many, we’d need to devote a whole main feature just to that.
Update: we have now done so!
Here it is: When BMI Doesn’t Measure Up
True or False: Obesity does not meaningfully impact more general health
False… In more ways than one (but there are caveats)
Obesity is highly correlated with increased risk of all-cause mortality, and weight loss, correspondingly, correlates with a reduced risk. See for example:
So what are the caveats?
Let’s put it this way: owning a horse is highly correlated with increased healthy longevity. And while owning a horse may come with some exercise and relaxation (both of which are good for the health), it’s probably mostly not the horse itself that conveys the health benefits… it’s that someone who has the resources to look after a horse, probably has the resources to look after their own health too.
So sometimes there can be a reason for a correlation (it’s not a coincidence!) but the causative factor is partially (or in some cases, entirely) something else.
So how could this play out with obesity?
There’s a lot of discrimination in healthcare settings, unfortunately! In this case, it often happens that a thin person goes in with a medical problem and gets treated for that, while a fat person can go in with the same medical problem and be told “you should try losing some weight”.
Top tip if this happens to you… Ask: “what would you advise/prescribe to a thin person with my same symptoms?”
Other things may be more systemic, for example:
When a thin person goes to get their blood pressure taken, and that goes smoothly, while a fat person goes to get their blood pressure taken, and there’s not a blood pressure cuff to fit them, is the problem the size of the person or the size of the cuff? It all depends on perspective, in a world built around thin people.
That’s a trivial-seeming example, but the same principle has far-reaching (and harmful) implications in healthcare in general, e.g:
- Surgeons being untrained (and/or unwilling) to operate on fat people
- Getting a one-size-fits-all dose that was calculated using average weight, and now doesn’t work
- MRI machines are famously claustrophobia-inducing for thin people; now try not fitting in it in the first place
…and so forth. So oftentimes, obesity will be correlated with a poor healthcare outcome, where the problem is not actually the obesity itself, but rather the system having been set up with thin people in mind.
It would be like saying “Having O- blood type results in higher risks when receiving blood transfusions”, while omitting to add “…because we didn’t stock O- blood”.
True or False: to reduce obesity, just eat less and move more!
False… Mostly.
Moving more is almost always good for most people. When it comes to diet, quality is much more important than quantity. But these factors alone are only part of the picture!
But beyond diet and exercise, there are many other implicated factors in weight gain, weight maintenance, and weight loss, including but not limited to:
- Disrupted sleep
- Chronic stress
- Chronic pain
- Hormonal imbalances
- Physical disabilities that preclude a lot of exercise
- Mental health issues that add (and compound) extra levels of challenge
- Medications that throw all kinds of spanners into the works with their side effects
…and even just those first two things, diet and exercise, are not always so correlated to weight as one might think—studies have found that the difference for exercise especially is often marginal:
Read: Widespread misconceptions about obesity ← academic article in the Journal of the College of Family Physicians of Canada
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Just One Thing – by Dr. Michael Mosley
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This is a collection of easy-to-implement changes that have good science behind them to show how they can benefit us. Some things are obvious (e.g: drink water); others, less so (e.g: sing, to reduce inflammation).
The book is divided thematically into times of the day, though in many cases it’s not a hard rule that a thing needs to be done at a certain time. Others are, like a cold shower in the morning and hot bath before bed—you might not want to switch those around!
The style is very pop-science, and does not have in-line citations for claims, but it does have a bibliography in the bag organized by each “one thing”, e.g. it might say “get some houseplants” and then list a number of references supporting that, with links to the studies showing how that helps. For those with the paper version, don’t worry, you can copy the URL from the book into your browser and see it that way. In any case, there are 2–6 scientific references for each claim, which is very respectable for a pop-sci book.
Bottom line: if you’re looking for evidence-based “one little thing” changes that can make a big difference, this book has lots!
Click here to check out Just One Thing, and improve your life!
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What Are Nootropics, Really?
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What are nootropics, really?
A nootropic is anything that functions as a cognitive enhancer—in other words, improves our brainpower.
These can be sensationalized as “smart drugs”, misrepresented excitingly in science fiction, meme-ified in the mundane (“but first, coffee”), and reframed entirely, (“exercise is the best nootropic”).
So, clearly, “nootropics” can mean a lot of different things. Let’s look at some of the main categories…
The neurochemical modulators
These are what often get called “smart drugs”. They are literally drugs (have a chemical effect on the body that isn’t found in our diet), and they affect the levels of certain neurotransmitters in the brain, such as by:
- Adding more of that neurotransmitter (simple enough)
- Decreasing the rate at which we lose that neurotransmitter (re-uptake inhibitors)
- Antagonizing an unhelpful neurotransmitter (doing the opposite thing to it)
- Blocking an unhelpful neurotransmitter (stopping the receptors from receiving it)
“Unhelpful” here is relative and subjective, of course. We need all the neurotransmitters that are in our brain, after all, we just don’t need all of them all the time.
Examples: modafinil, a dopamine re-uptake inhibitor (mostly prescribed for sleep disorders), reduces the rate at which our brains scrub dopamine, resulting in a gradual build-up of dopamine that we naturally produced, so we get to enjoy that dopamine for longer. This will tend to promote wakefulness, and may also help with problem-solving and language faculties—as well as giving a mood boost. In other words, all things that dopamine is used for. Mirtazaрine, an adrenoreceptor agonist (mostly prescribed as an antidepressant), increases noradrenergic neurotransmission, thus giving many other brain functions a boost.
Why it works: our brains need healthy levels of neurotransmitters, in order to function well. Those levels are normally self-regulating, but can become depleted in times of stress or fatigue, for example.
The metabolic brain boosters
These are the kind of things that get included in nootropic stacks (stack = a collection of supplements and/or drugs that complement each other and are taken together—for example, a multivitamin tablet could be described as a vitamin stack) even though they have nothing specifically relating them to brain function. Why are they included?
The brain needs so much fuel. Metabolically speaking, it’s a gas-guzzler. It’s the single most resource-intensive organ of our body, by far. So, metabolic brain boosters tend to:
- Increase blood flow
- Increase blood oxygenation
- Increase blood general health
- Improve blood pressure (this is relative and subjective, since very obviously there’s a sweet spot)
Examples: B-vitamins. Yep, it can be that simple. A less obvious example might be Co-enzyme Q10, which supports energy production on a cellular level, and good cardiovascular health.
Why it works: you can’t have a healthy brain without a healthy heart!
We are such stuff as brains are made of
Our brains are made of mostly fat, water, and protein. But, not just any old fat and protein—we’re at least a little bit special! So, brain-food foods tend to:
- Give the brain the fats and proteins it’s made of
- Give the brain the stuff to make the fats and proteins it’s made of (simpler fats, and amino acids)
- Give the brain hydration! Just having water, and electrolytes as appropriate, does this
Examples: healthy fats from nuts, seeds, and seafood; also, a lot of phytonutrients from greens and certain fruits. Long-time subscribers may remember our article “Brain Food: The Eyes Have It!” on the importance of dietary lutein in reducing Alzheimer’s risk, for example
Why it works: this is matter of structural upkeep and maintenance—our brains don’t work fabulously if deprived of the very stuff they’re made of! Especially hydration is seriously underrated as a nootropic factor, by the way. Most people are dehydrated most of the time, and the brain dehydrates quickly. Fortunately, it rehydrates quickly as well when we take hydrating liquids.
Weird things that sound like ingredients in a witch’s potion
These are too numerous and too varied in how they work to cover here, but they do appear a lot in nootropic stacks and in popular literature on the subject.
Often they work by one of the mechanisms described above; sometimes we’re not entirely sure how they work, and have only measured their effects sufficiently to know that, somehow, they do work.
Examples: panax ginseng is one of the best-studied examples that still remains quite mysterious in many aspects of its mechanism. Lion’s Mane (the mushroom, not the jellyfish or the big cat hairstyle), meanwhile, is known to contain specific compounds that stimulate healthy brain cell growth.
Why it works: as we say, it varies so much from on ingredient to another in this category, so… Watch out for our Research Review Monday features, as we’ll be covering some of these in the coming weeks!
(PS, if there’s any you’d like us to focus on, let us know! We always love to hear from you. You can hit reply to any of our emails, or use the handy feedback widget at the bottom)
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Olive Oil vs Coconut Oil – Which is Healthier?
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Our Verdict
When comparing extra virgin olive oil to cold-pressed coconut oil, we picked the olive oil.
Why?
While the cold-pressed coconut oil may offer some health benefits due to its lauric acid content, its 80–90% saturated fat content isn’t great for most people. It’s a great oil when applied topically for healthy skin and hair, though!
The extra virgin olive oil has a much more uncontroversially healthy blend of triglycerides, and (in moderation) is universally recognized as very heart-healthy.
Your local supermarket, most likely, has a good extra virgin olive oil, but if you’d like to get some online, here’s an example product on Amazon for your convenience.
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Resistance Beyond Weights
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Resistance, Your Way
We’ve talked before about the importance of resistance training:
Resistance Is Useful! (Especially As We Get Older)
And we’ve even talked about how to make resistance training more effective:
(High Intensity Interval Training, but make it High Intensity Resistance Training)
Which resistance training exercises are best?
There are two reasonable correct answers here:
- The resistance training exercises that you will actually do (because it’s no good knowing the best exercise ever if you’re not going to do it because it is in some way offputting to you)
- The resistance training exercises that will prevent you from getting a broken bone in the event of some accident or incident
This latter is interesting, because when people think resistance training, the usually immediate go-to exercises are often things like the bench press, or the chest machine in the gym.
But ask yourself: how often do we hear about some friend or relative who in their old age has broken their humerus?
It can happen, for sure, but it’s not as often as breaking a hip, a tarsal (ankle bones), or a carpal (wrist bones).
So, how can we train to make those bones strong?
Strong bones grow under strong muscles
When archaeologists dig up a skeleton from a thousand years ago, one of the occupations that’s easy to recognize is an archer. Why?
An archer has an unusual frequent exercise: pushing with their left arm while pulling with their right arm. This will strengthen different muscles on each side, and thus, increase bone density in different places on each arm. The left first metacarpal and right first and second metacarpals and phalanges are also a giveaway.
This is because: one cannot grow strong muscles on weak bones (or else the muscles would just break the bones), so training muscles will force the body to strengthen the relevant bones.
So: if you want strong bones, train the muscles attached to those bones
This answers the question of “how am I supposed to exercise my hips” etc.
Weights, bodyweight, resistance bands
If you go to the gym, there’s a machine for everything, and a member of gym staff will be able to advise which of their machines will strengthen which muscles.
If you train with free weights at home:
- Wrist curls (forearm supported and stationary, lifting a dumbbell in your hand, palm-upwards) will strengthen the wrist
- The farmer’s walk (carrying a heavy weight in each hand) will also strengthen your wrist
- A modified version of this involves holding the weight with just your fingertips, and then raising and lowering it by curling and uncurling your fingers)
- Lateral leg raises (you will need ankle-weights for this) will strengthen your ankles and your hips, as will hip abductions (as in today’s featured video), especially with a weight attached.
- Ankle raises (going up on your tip-toes and down again, repeat) while holding weights in your hands will strengthen your ankles
If you don’t like weights:
- Press-ups will strengthen your wrists
- Fingertip press-ups are even better: to do these, do your press-ups as normal, except that the only parts of your hands in contact with the ground are your fingertips
- This same exercise can be done the other way around, by doing pull-ups
- And that same “even better” works by doing pull-ups, but holding the bar only with one’s fingertips, and curling one’s fingers to raise oneself up
- Lateral leg raises and hip abductions can be done with a resistance band instead of with weights. The great thing about these is that whereas weights are a fixed weight, resistance bands will always provide the right amount of resistance (because if it’s too easy, you just raise your leg further until it becomes difficult again, since the resistance offered is proportional to how much tension the band is under).
Remember, resistance training is still resistance training even if “all” you’re resisting is gravity!
If it fells like work, then it’s working
As for the rest of preparing to get older?
Check out:
Training Mobility Ready For Later Life
Take care!
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Sometimes, Perfect Isn’t Practical!
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝10 AM breakfast is not realistic for most. What’s wrong with 8 AM and Evening me at 6. Don’t quite understand the differentiation.❞
(for reference, this is about our “Breakfasting For Health?” main feature)
It’s not terrible to do it the way you suggest It’s just not optimal, either, that’s all!
Breakfasting at 08:00 and then dining at 18:00 is ten hours apart, so no fasting benefits between those. Let’s say you take half an hour to eat dinner, then eat nothing again until breakfast, that’s 18:30 to 08:00, so that’s 13½ hours fasting. You’ll recall that fasting benefits start at 12 hours into the fast, so that means you’d only get 1½ hours of fasting benefits.
As for breakfasting at 08:00 regardless of intermittent fasting considerations, the reason for the conclusion of around 10:00 being optimal, is based on when our body is geared up to eat breakfast and get the most out of that, which the body can’t do immediately upon waking. So if you wake and get sunlight at 08:30, get a little moderate exercise, then by 10:00 your digestive system will be perfectly primed to get the most out of breakfast.
However! This is entirely based on you waking and getting sunlight at 08:30.
So, iff you wake and get sunlight at 06:30, then in that case, breakfasting at 08:00 would give the same benefits as described above. What’s important is the 1½ hour priming-time.
Writer’s note: our hope here is always to be informational, not prescriptive. Take what works for you; ignore what doesn’t fit your lifestyle.
I personally practice intermittent fasting for about 21hrs/day. I breakfast (often on nuts and perhaps a little salad) around 16:00, and dine at around 18:00ish, giving myself a little wiggleroom. I’m not religious about it and will slide it if necessary.
As you can see: that makes what is nominally my breakfast practically a pre-dinner snack, and I clearly ignore the “best to eat in the morning” rule because that’s not consistent with my desire to have a family dinner together in the evening while still practicing the level of fasting that I prefer.
Science is science, and that’s what we report here. How we apply it, however, is up to us all as individuals!
Enjoy!
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Three Critical Kitchen Prescriptions
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Three Critical Kitchen Prescriptions
This is Dr. Saliha Mahmood-Ahmed. She’s a medical doctor—specifically, a gastroenterologist. She’s also a chef, and winner of the BBC’s MasterChef competition. So, from her gastroenterology day-job and her culinary calling, she has some expert insights to share on eating well!
❝Food and medicine are inextricably linked to one another, and it is an honour to be a doctor who specialises in digestive health and can both cook, and teach others to cook❞
~ Dr. Saliha Mahmood-Ahmed, after winning MasterChef and being asked if she’d quit medicine to be a full-time chef
Dr. Mahmood-Ahmed’s 3 “Kitchen Prescriptions”
They are:
- Cook, cook, cook
- Feed your gut bugs
- Do not diet
Let’s take a look at each of those…
Cook, cook, cook
We’re the only species on Earth that cooks food. An easy knee-jerk response might be to think maybe we shouldn’t, then, but… We’ve been doing it for at least 30,000 years, which is about 1,500 generations, while a mere 100 generations is generally sufficient for small evolutionary changes. So, we’ve evolved this way now.
More importantly in this context: we, ourselves, should cook our own food, at least per household.
Not ready meals; we haven’t evolved for those (yet! Give it another few hundred generations maybe)
Feed your gut bugs
The friendly ones. Enjoy prebiotics, probiotics, and plenty of fiber—and then be mindful of what else you do or don’t eat. Feeding the friendly bacteria while starving the unfriendly ones may seem like a tricky task, but it actually can be quite easily understood and implemented. We did a main feature about this a few weeks ago:
Making Friends With Your Gut (You Can Thank Us Later)
Do not diet
Dr. Mahmood-Ahmed is a strong critic of calorie-counting as a weight-loss strategy:
Rather than focusing on the number of calories consumed, try focusing on introducing enough variety of food into your daily diet, and on fostering good microbial diversity within your gut.
It’s a conceptual shift from restrictive weight loss, to prescriptive adding of things to one’s diet, with fostering diversity of microbiota as a top priority.
This, too, she recommends be undertaken gently, though—making small, piecemeal, but sustainable improvements. Nobody can reasonably incorporate, say, 30 new fruits and vegetables into one’s diet in a week; it’s unrealistic, and more importantly, it’s unsustainable.
Instead, consider just adding one new fruit or vegetable per shopping trip!
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