New News From The Centenarian Blue Zones
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From Blue To Green…
We sometimes write about supercentenarians, which word is usually used in academia to refer to people who are not merely over 100 years of age, but over 110 years. These people can be found in many countries, but places where they have been found to be most populous (as a percentage of the local population) have earned the moniker “Blue Zones”—of which Okinawa and Sardinia are probably the most famous, but there are others too.
This is in contrast to, for example “Red Zones”, a term often used for areas where a particular disease is endemic, or areas where a disease is “merely” epidemic, but particularly rife at present.
In any case, back to the Blue Zones, where people live the longest and healthiest—because the latter part is important too! See also:
- Lifespan: how long we live
- Healthspan: how long we stay healthy (portmanteau of “healthy lifespan”)
Most of our readers don’t live in a Blue Zone (in fact, many live in the US, which is a COVID Red Zone, a diabetes Red Zone, and a heart disease Red Zone), but that doesn’t mean we can’t all take tips from the Blue Zones and apply them, for example:
- The basics: The Blue Zones’ Five Pillars Of Longevity
- Going beyond: The Five Key Traits Of Healthy Aging
You may be wondering… How much good will this do me? And, we do have an answer for that:
When All’s Said And Done, How Likely Are You To Live To 100?
Now that we’re all caught-up…
The news from the Blues
A team of researchers did a big review of observational studies of centenarians and near-centenarians (aged 95+). Why include the near-centenarians, you ask? Well, most of the studies are also longitudinal, and if we’re doing an observational study of the impact of lifestyle factors on a 100-year-old, it’s helpful to know what they’ve been doing recently. Hence nudging the younger-end cutoff a little lower, so as to not begin each study with fresh-faced 100-year-olds whom we know nothing about.
Looking at thousands of centenarians (and near-centenarians, but also including some supercentenarians, up the age of 118), the researchers got a lot of very valuable data, far more than we have room to go into here (do check out the paper at the bottom of this article, if you have time; it’s a treasure trove of data), but one of the key summary findings was a short list of four factors they found contributed the most to extreme longevity:
- A diverse diet with low salt intake: in particular, a wide variety of plant diversity, including protein-rich legumes, though fish featured prominently also. On average they got 57% and 65% of their energy intake from carbohydrates, 12% to 32% from protein, and 27% to 31% from fat. As for salt, they averaged 1.6g of sodium per day, which is well within the WHO’s recommendation of averaging under 2g of sodium per day. As a matter of interest, centenarians in Okinawa itself averaged 1.1g of sodium per day.
- Low medication use: obviously there may be a degree of non-causal association here, i.e. the same people who just happened to be healthier and therefore lived longer, correspondingly took fewer medications—they took fewer medications because they were healthier; they weren’t necessarily healthier because they took fewer medications. That said, overmedication can be a big problem, especially in places with a profit motive like the US, and can increase the risk of harmful drug interactions, and side effects that then need more medications to treat the side effects, as well as direct iatrogenic damage (i.e. this drug treats your condition, but as the cost of harming you in some other way). Naturally, sometimes we really do need meds, but it’s a good reminder to do a meds review with one’s doctor once in a while, and see if everything’s still of benefit.
- Getting good sleep: not shocking, and this one’s not exactly news. But what may be shocking is that 68% of centenarians reported consistently getting enough good-quality sleep. To put that into perspective, only 35% of 10almonds readers reported regularly getting sleep in the 7–9 hours range.
- Rural living environment: more than 75% of the centenarians and near-centenarians lived in rural areas. This is not usually something touted as a Blue Zones thing on lists of Blue zones things, but this review strongly highlighted it as very relevant. In the category of things that are more obvious once it’s pointed out, though, this isn’t necessarily such a difference between “country folk” and “city folk”, so much as the ability to regularly be in green spaces has well-established health benefits physically, mentally, and both combined (such as: neurologically).
And showing that yes, even parks in cities make a significant difference:
Want to know more?
You can read the study in full here:
A systematic review of diet and medication use among centenarians and near-centenarians worldwide
Take care!
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The Checklist Manifesto – by Dr. Atul Gawande
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Dr. Gawande, himself a general surgeon, uses checklists a lot. He is, unequivocally, an expert in his field. He “shouldn’t” need a checklist to tell him to do such things as “Check you have the correct patient”. But checklists are there as a safety net. And, famously, “safety regulations are written in blood”, after all.
And, who amongst us has never made such a “silly” error? From forgetting to turn the oven on, to forgetting to take the handbrake off, it takes only a momentary distraction to think we’ve done something we haven’t.
You may be wondering: why a whole book on this? Is it just many examples of the usefulness of checklists? Because I’m already sold on that, so, what else am I going to get out of it?
Dr. Gawande also explains in clear terms:
- How to optimize “all necessary steps” with “as few steps as possible”
- The important difference between read-do checklists and do-confirm checklists
- To what extent we should try to account for the unexpected
- How to improve compliance (i.e., making sure you actually use it, no matter how tempting it will be to go “yeah this is automatic for me now” and gloss over it)
- The role of checklists in teams, and in passing on knowledge
…and more.
Bottom line: if you’ve ever tried to make tea without putting the tea-leaves in the pot, this is the book that will help you avoid making more costly mistakes—whatever your area of activity or interest.
Click here to check out the Checklist Manifesto, and make fewer mistakes!
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How Does Fat Actually Leave The Body? Where Does It Go?
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Fat loss is often misunderstood, with many believing it simply “vanishes” through exercise, is simply excreted in solid form in the bathroom, or materially disappears when converted for energy. However, the principle of conservation of mass plays out here, in that the mass in fat doesn’t disappear—it changes its arrangement:
In and out
Fat is composed of carbon, hydrogen, and oxygen atoms, with an example common form of fat in the body being C55H104O6. That’s a lot of Cs and Hs, and a few Os.
When fat leaves the body, it has been primarily converted into carbon dioxide (CO2) and water (H2O).
According to a 2014 study by the University of South Wales, 84% of the mass of fat exits the body as CO2 exhaled through breathing, while 16% leaves as water through sweat, urine, and other bodily fluids (all of which contain H2O).
You’ll notice there are a lot more Os going out, proportionally, than we originally had in the C55H104O6. For this reason, the process requires oxygen intake; for every 10 kilograms of fat burned, by simple mathematics the body needs around 29 kilograms of oxygen.
Physical activity plays a crucial role in fat loss. When the body exerts itself, it naturally switches to a higher oxygen metabolism necessary for fat breakdown. This effect is amplified during intermittent fasting, which boosts human growth hormone (HGH), a hormone that aids in fat metabolism.
However, simply hyperventilating won’t work; exercise is essential to activate these processes—otherwise it’s just a case of oxygen in, oxygen out, without involving the body’s chemical energy reserves.
Consequently, one of the best diet-and-exercise combinations for fat loss is intermittent fasting with high-intensity interval training.
And, as for what to eat, this video says raw vegan, but honestly, that’s not scientific consensus. However, a diet rich in unprocessed (or minimally processed) fruits and vegetables definitely is where it’s at, with the plant-heavy Mediterranean diet generally scoring highest—which can be further improved by skipping the mammals to make it pesco-Mediterranean. Current scientific consensus does not give any extra benefits for also omitting moderate consumption of fish and fermented dairy products, so include those if you want, or skip those if you prefer.
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Are You A Calorie-Burning Machine? (Calorie Mythbusting)
Take care!
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Avocado vs Olives – Which is Healthier?
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Our Verdict
When comparing avocado to olives, we picked the avocado.
Why?
Both are certainly great! And when it comes to their respective oils, olive oil wins out as it retains many micronutrients that avocado oil loses. But, in their whole form, avocado beats olive:
In terms of macros, avocado has more protein, carbs, fiber, and (healthy) fats. Simply, it’s more nationally-dense than the already nutritionally-dense food that is olives.
When it comes to vitamins, olives are great but avocados really shine; avocado has more of vitamins B1, B2, B3, B5, B6, B7 B9, C, E, K, and choline, while olives boast only more vitamin A.
In the category of minerals, things are closer to even; avocado has more magnesium, manganese, phosphorus, potassium, and zinc, while olives have a lot more calcium, copper, iron, and selenium. Still, a marginal victory for avocado here.
In short, this is another case of one very healthy food looking bad by standing next to an even better one, so by all means enjoy both—if you’re going to pick one though, avocado is the more nutritionally dense.
Want to learn more?
You might like to read:
Avocado Oil vs Olive Oil – Which is Healthier? ← when made into oils, olive oil wins, but avocado oil is still a good option too
Take care!
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Encyclopedia Of Herbal Medicine – by Andrew Chevallier
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A common problem with a lot of herbal medicine is it’s “based on traditional use only”, while on the other hand, learning about the actual science of it can mean poring through stacks of Randomized Clinical Trials, half of which are paywalled.
This beautifully and clearly-illustrated book bridges that gap. It gives not just the history, but also the science, of the use of many medicinal herbs (spotlight on 100 key ones; details on 450 more).
It gives advice on growing, harvesting, processing, and using the herbs, as well as what not to do (with regard to safety). And in case you don’t fancy yourself a gardener, you’ll also find advice on places one can buy herbs, and what you’ll need to know to choose them well (controlling for quality etc).
You can read it cover-to-cover, or look up what you need by plant in its general index, or by ailment (200 common ailments listed). As for its bibliography, it does list many textbooks, but not individual papers—though it does cite 12 popular scientific journals too.
Bottom line: if you want a good, science-based, one-stop book for herbal medicine, this is a top-tier choice.
Click here to check out the Encyclopedia of Herbal Medicine, and expand your home remedy repertoire!
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From Painkillers To Hunger-Killers
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Here’s this week’s selection of health news discoveries, the science behind them, what they mean for you, and where you can go from there:
Killing more than pain
It’s well-known that overuse of opioids can lead to many problems, and here’s another one: messing with the endocrine system. This time, mostly well-evidenced in men—however, the researchers are keen to point out that absence of evidence is very much not evidence of absence, hence “the hidden effects” in the headline below. It’s not that the effects are hard to see—it’s that a lot of the research has yet to be done. For now, though, we know at the very least that there’s an association between opioid use and hyperprolactinemia in men. The same research also begins to shine a light on the effects of opioid use on the hypothalamic-pituitary system and bone health, too:
Read in full: The hidden effects of opioid use on the endocrine system
Related: The 7 Approaches To Pain Management
Gut microbiome dysbiosis may lead to slipping disks
These things sound quite unconnected, but the association is strong. The likely mechanism of action is that the gut dysbiosis influences systemic inflammation, and thus spinal health—because the gut-spine axis cannot really be disconnected (while you’re alive, at least). It’s especially likely if you’re over 50 and female:
Read in full: Are back problems influenced by your gut?
Related: Is Your Gut Leading You Into Osteoporosis?
The Internet is really really great (for brains)
It’s common to see many articles on the Internet telling us, paradoxically, that we should spend less time on the Internet. However… Remember when in the 90s, it was all about “the information superhighway”? It turns out, the fact that it’s more like “the information spaghetti junction” these days doesn’t change the fact that stimulation is good for our brains, and daily Internet use improves memory, because of the different way that we index and store information that came from a virtual source. While there are parts of your brain for “things at home” and “things at the local supermarket”, there are also parts for “things at 10almonds” and “things at Facebook” and so forth. You are, in effect, building a vast mental library as you surf:
Read in full: Daily internet use supercharges your memory!
Related: Make Social Media Work For Your Mental Health
Fall back
Around this time of year in many places in the Northern Hemisphere, the clocks go back an hour (it’s next weekend in the US and Canada, by the way, and this weekend in most of Europe). Many enjoy this as the potential for an extra hour’s sleep, but for night owls, it can be more of a nuisance than a benefit—throwing out what’s often an already difficult relationship with the clock, and presenting challenges both practical and physiological (different processing of melatonin, for instance). Here be science:
Read in full: Why night owls struggle more when the clocks go back
Related: Early Bird Or Night Owl? Genes vs Environment
Can you outrun your hunger?
It seems so, though benefits are strongest in women. We say “outrun”, though this study did use stationary cycling. To put it in few words, intense exercise (but not moderate exercise) significantly reduced acylated ghrelin (hunger hormone) levels, and subjective reports of hunger, especially in women:
Read in full: Study finds intense exercise may suppress appetite in healthy humans
Related: 3 Appetite Suppressants Better Than Ozempic
Take care!
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Could ADHD drugs reduce the risk of early death? Unpacking the findings from a new Swedish study
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Attention-deficit hyperactivity disorder (ADHD) can have a considerable impact on the day-to-day functioning and overall wellbeing of people affected. It causes a variety of symptoms including difficulty focusing, impulsivity and hyperactivity.
For many, a diagnosis of ADHD, whether in childhood or adulthood, is life changing. It means finally having an explanation for these challenges, and opens up the opportunity for treatment, including medication.
Although ADHD medications can cause side effects, they generally improve symptoms for people with the disorder, and thereby can significantly boost quality of life.
Now a new study has found being treated for ADHD with medication reduces the risk of early death for people with the disorder. But what can we make of these findings?
A large study from Sweden
The study, published this week in JAMA (the prestigious journal of the American Medical Association), was a large cohort study of 148,578 people diagnosed with ADHD in Sweden. It included both adults and children.
In a cohort study, a group of people who share a common characteristic (in this case a diagnosis of ADHD) are followed over time to see how many develop a particular health outcome of interest (in this case the outcome was death).
For this study the researchers calculated the mortality rate over a two-year follow up period for those whose ADHD was treated with medication (a group of around 84,000 people) alongside those whose ADHD was not treated with medication (around 64,000 people). The team then determined if there were any differences between the two groups.
What did the results show?
The study found people who were diagnosed and treated for ADHD had a 19% reduced risk of death from any cause over the two years they were tracked, compared with those who were diagnosed but not treated.
In understanding this result, it’s important – and interesting – to look at the causes of death. The authors separately analysed deaths due to natural causes (physical medical conditions) and deaths due to unnatural causes (for example, unintentional injuries, suicide, or accidental poisonings).
The key result is that while no significant difference was seen between the two groups when examining natural causes of death, the authors found a significant difference for deaths due to unnatural causes.
So what’s going on?
Previous studies have suggested ADHD is associated with an increased risk of premature death from unnatural causes, such as injury and poisoning.
On a related note, earlier studies have also suggested taking ADHD medicines may reduce premature deaths. So while this is not the first study to suggest this association, the authors note previous studies addressing this link have generated mixed results and have had significant limitations.
In this new study, the authors suggest the reduction in deaths from unnatural causes could be because taking medication alleviates some of the ADHD symptoms responsible for poor outcomes – for example, improving impulse control and decision-making. They note this could reduce fatal accidents.
The authors cite a number of studies that support this hypothesis, including research showing ADHD medications may prevent the onset of mood, anxiety and substance use disorders, and lower the risk of accidents and criminality. All this could reasonably be expected to lower the rate of unnatural deaths.
Strengths and limitations
Scandinavian countries have well-maintained national registries that collect information on various aspects of citizens’ lives, including their health. This allows researchers to conduct excellent population-based studies.
Along with its robust study design and high-quality data, another strength of this study is its size. The large number of participants – almost 150,000 – gives us confidence the findings were not due to chance.
The fact this study examined both children and adults is another strength. Previous research relating to ADHD has often focused primarily on children.
One of the important limitations of this study acknowledged by the authors is that it was observational. Observational studies are where the researchers observe and analyse naturally occurring phenomena without intervening in the lives of the study participants (unlike randomised controlled trials).
The limitation in all observational research is the issue of confounding. This means we cannot be completely sure the differences between the two groups observed were not either partially or entirely due to some other factor apart from taking medication.
Specifically, it’s possible lifestyle factors or other ADHD treatments such as psychological counselling or social support may have influenced the mortality rates in the groups studied.
Another possible limitation is the relatively short follow-up period. What the results would show if participants were followed up for longer is an interesting question, and could be addressed in future research.
What are the implications?
Despite some limitations, this study adds to the evidence that diagnosis and treatment for ADHD can make a profound difference to people’s lives. As well as alleviating symptoms of the disorder, this study supports the idea ADHD medication reduces the risk of premature death.
Ultimately, this highlights the importance of diagnosing ADHD early so the appropriate treatment can be given. It also contributes to the body of evidence indicating the need to improve access to mental health care and support more broadly.
Hassan Vally, Associate Professor, Epidemiology, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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