What’s Lurking In Your Household Air?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
As individuals, we can’t do much about the outside air. We can try to spend more time in green spaces* and away from traffic, and we can wear face-masks—as was popular in Tokyo and other such large cities long before the pandemic struck.
*The well-known mental health benefits aside (and contrary to British politician Amber Rudd’s famous assertion in a televised political debate that “clean air doesn’t grow on trees”), clean air comes mostly from trees—their natural process of respiration scrubs not only carbon dioxide, but also pollutants, from the air before releasing oxygen without the pollutants. Neat!
See also this study: Site new care homes near trees and away from busy roads to protect residents’ lungs
We are fortunate to be living in a world where most of us in industrialized countries can exercise a great degree of control over our home’s climate. But, what to do with all that power?
Temperature
Let’s start with the basics. Outside temperature may vary, but you probably have heating and air conditioning. There’s a simple answer here; the optimal temperature for human comfort and wellbeing is 20℃ / 68℉:
Scientists Identify a Universal Optimal Temperature For Life on Earth
Note: this does not mean that that is the ideal global average temperature, because that would mean the polar caps are completely gone, the methane stored there released, many large cities underwater, currently hot places will be too hot for human life (e.g. outside temperatures above human body temperature), there will be mass extinctions of many kinds of animals and plants, including those we humans require for survival, and a great proliferation of many bugs that will kill us. Basically we need diversity for the planet to survive, arctic through to tropical and yes, even deserts (deserts are important carbon sinks!). The ideal global average temperature is about 14℃ (we currently have about 15℃ and rising).
But, for setting the thermostat in your home, 20℃ / 68℉ is perfect for most people, though down as far as 17℃ / 61℉ is fine too, provided other things such as humidity are in order. In fact, for sleeping, 18℃ / 62℉ is ideal. This is because the cooler temperature is one of the several things that tell our brain it is nighttime now, and thus trigger secretion of melatonin.
If you’re wondering about temperatures and respiratory viruses, by the way, check out:
The Cold Truth About Respiratory Infections: The Pathogens That Came In From The Cold
Humidity
Most people pay more attention to the temperature in their home than the humidity, and the latter is just as important:
❝Conditions that fall outside of the optimal range of 40–60% can have significant impacts on health, including facilitating infectious transmission and exacerbating respiratory diseases.
When humidity is too low, it can cause dryness and irritation of the respiratory tract and skin, making individuals more susceptible to infections.
When humidity is too high, it can create a damp environment that encourages the growth of harmful microorganisms like mould, bacteria, and viruses.❞
~ Dr. Gabriella Guarnieri et al.
So, if your average indoor humidity falls outside of that range, consider getting a humidifier or dehumidifier, to correct it. Example items on Amazon, for your convenience:
Humidity monitor | Humidifier | Dehumidifier
See also, about a seriously underestimated killer:
Pneumonia: Prevention Is Better Than Cure
Now, one last component to deal with, for perfect indoor air:
Pollution
We tend to think of pollution as an outdoors thing, and indeed, the pollution in your home will (hopefully!) be lower than that of a busy traffic intersection. However…
- The air you have inside comes from outside, and that matters if you’re in an urban area
- Even in suburban and rural areas, general atmospheric pollutants will reach you, and if you’ve ever been subject to wildfire smoke, you’ll know that’s no fun either.
- Gas appliances in the home cause indoor pollution, even when carbon monoxide is within levels considered acceptable. This polluting effect is much stronger for open gas flames (such as on gas cookers/stoves, or gas fires), than for closed gas heating systems (such as a gas-powered boiler for central heating).
- Wood stoves/fireplaces are not an improvement, in fact they are worse, and don’t get us started on coal. You should not be breathing these things, and definitely should not be burning them in an enclosed space.
- That air conditioning, humidifier, dehumidifier? They may be great for temperature and humidity, but please clean/change the filter more often than you think is necessary, or things will grow there and then your device will be adding pathogens to the air as it goes.
- Plug-in air-freshening devices? They may smell clean, but they are effectively spraying cleaning fluids into your lungs. So please don’t.
So, what of air purifiers? They can definitely be of benefit. for example:
But watch out! Because if you don’t clean/change the filter regularly, guess what happens! That’s right, it’ll be colonized with bacteria/fungus and then be blowing those at you.
And no, not all of them will be visible to the naked eye:
Is Unnoticed Environmental Mold Harming Your Health?
Taking a holistic approach
The air is a very important factor for the health of your lungs (and thus, for the health of everything that’s fed oxygen by your lungs), but there are more things we can do as well:
Seven Things To Do For Good Lung Health!
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Recommended
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
How To Keep Warm (Without Sweat Patches!)
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
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
❝I saw an advert on the subway for a pillow spray that guarantees a perfect night’s sleep. What does the science say about smells/sleep?❞
That is certainly a bold claim! Unless it’s contingent, e.g. “…or your money back”. Because otherwise, it absolutely cannot guarantee that.
There is some merit:
❝Odors can modulate the latency to sleep onset, as well as the quality and duration of sleep. Olfactory modulation of sleep may be mediated by direct synaptic interaction between the olfactory system and sleep control nuclei, and/or indirectly through odor modulation of arousal and respiration.
Such modulation appears most heavily influenced by past associations and expectations about the odor, beyond any potential direct physicochemical effect❞
Source: Reciprocal relationships between sleep and smell
Translating that from sciencese:
Sometimes we find pleasant smells relaxing, and placebo effect also helps.
That “any potential direct physiochemical effect”, though, when it does occur, is things like this…
Read: Odor blocking of stress hormone responses
…but that’s a mouse study, and those odors may only work to block three specific mouse stress responses to three specific stressors: physical restraint, predator odor, and male–male confrontation.
In other words: if, perchance, those three things are not what’s stressing you in bed at night (we won’t make assumptions), and/or you are not a mouse, it may not help.
(and this, dear readers, is why we must read articles, and not just headlines!)
But! If you are going to go for a pillow fragrance, something well-associated with being relaxing and soporific, such as lavender, is the way to go:
- Effects of aromatherapy on sleep quality and anxiety of patients
- Effects of Aromatherapy on the Anxiety, Vital Signs, and Sleep Quality of Percutaneous Coronary Intervention Patients in Intensive Care Units
- Effect of lavender aromatherapy on vital signs and perceived quality of sleep in the intermediate care unit: a pilot study
tl;dr = patients found lavender fragrances relaxing, experienced less anxiety, got better sleep (significantly or insignificantly, depending on the study) and enjoyed lower blood pressure (significantly or insignificantly, depending on the study).
PS: this writer uses a pillow spray like this one
Enjoy!
Share This Post
-
The Squat Bible – by Dr. Aaron Horschig
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
You probably know the following three things about squats:
- Squatting is great for the health in many ways
- There are many different ways to squat
- Not all of them are correct, and some may even do harm
Dr. Aaron Horschig makes the case for squats being a movement first, and an exercise second. To this end, he takes us on a joint-by-joint tour of the anatomy of squatting, so that we get it right from top to toe.
Or rather: from toe to top, since he starts with the best foundation.
What this means is that if you’ve struggled to squat because you find some discomfort in your ankles, or a weakness in the knees, or you can’t get your back quite right, Dr. Horschig will have a fix for you. He also takes a realistic look about how people’s anatomy varies from person to person, and what differences this makes to how we each should best squat.
The explanations are clear and so are the pictures—we recommend getting the color print edition (linked), as the image quality is better than the black and white and/or Kindle edition.
Bottom-line: squats are one of the single best exercises we can do for our health—but we can miss out on benefits (or even do ourselves harm) if we don’t do them well. This book is a comprehensive reference resource for making sure we get the most out of our squatting ability.
Click here to check out The Squat Bible, and master this all-important movement!
Share This Post
-
Sea Salt vs MSG – Which is Healthier?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Our Verdict
When comparing sea salt to MSG, we picked the MSG.
Why?
Surprise! Or maybe not? The results of the poll for this one should be interesting, and will help us know whether we need to keep mentioning in every second recipe that MSG is a healthier alternative to salt.
First of all, two things:
- Don’t be fooled by their respective names, and/or with such, an appeal to naturalism. For example, hydroxybenzoic acids are a major group of beneficial phenolic compounds, whereas hemlock is a wildflower that grows in this writer’s garden and will kill you if you eat it. Actually hydroxybenzoic acids also grow here (on the apple tree), but that’s not the point. The point is: worry less about names, and more about evidence!
- Don’t be fooled by the packaging. A lot of products go for “greenwashing” of one kind or another. You’re not eating the packaging (hopefully), so don’t be swayed by a graphic designer’s implementation of a marketing team’s aesthetic choices.
If naturalism is for some reason very important to you though, do bear in mind that glutamates occur generously in many common foodstuffs (tomatoes are a fine, healthy example) and eating tomato in the presence of salt will have the same biochemical effect as eating MSG, because it’s the same chemicals.
Since there are bad rumors about MSG’s safety, especially in the US where there is often a strong distrust of anything associated with China (actually MSG was first isolated in Japan, more than 100 years ago, by Japanese biochemist Dr. Kikunae Ikeda, but that gets drowned out by the “Chinese Restaurant Syndrome” fear in the US), know that this has resulted in MSG being one of the most-studied food additives in the last 40 years or so, with many teams of scientists trying to determine its risks and not finding any (aside from the same that could be said of any substance; anything in sufficient excess will kill you, including water or oxygen).
Well, that’s all been about safety, but what makes it healthier than sea salt?
Simply, it has about ⅓ of the sodium content, that’s all. So, if you are laboring all day in a field under the hot summer sun, then probably the sea salt will be healthier, to replenish more of the sodium you lost through sweat. But for most people most of the time, having less sodium rather than more is the healthier option.
Want to learn more?
You might like to read:
- Monosodium Glutamate: Sinless Flavor-Enhancer Or Terrible Health Risk?
- MSG vs. Salt: Sodium Comparison ← here be chemistry
- More Salt, Not Less? ← No
- Pink Himalayan Salt: Health Facts
Take care!
Share This Post
Related Posts
-
Ice Baths: To Dip Or Not To Dip?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
We asked you for your (health-related) view of ice baths, and got the above-depicted, below-described, set of responses:
- About 31% said “ice baths are great for the health; we should take them”
- About 29% said “ice baths’ risks outweigh their few benefits”
- About 26% said “ice baths’ benefits outweigh their few risks”
- About 14% said “ice baths are dangerous and can kill you; best avoided”
So what does the science say?
Freezing water is very dangerous: True or False?
True! Water close to freezing point is indeed very dangerous, and can most certainly kill you.
Fun fact, though: many such people are still saveable with timely medical intervention, in part because the same hypothermia that is killing them also slows down the process* of death
Source (and science) for both parts of that:
Cold water immersion: sudden death and prolonged survival
*and biologically speaking, death is a process, not an event, by the way. But we don’t have room for that today!
(unless you die in some sudden violent way, such as a powerful explosion that destroys your brain instantly; then it’s an event)
Ice baths are thus also very dangerous: True or False?
False! Assuming that they are undertaken responsibly and you have no chronic diseases that make it more dangerous for you.
What does “undertaken responsibly” mean?
Firstly, the temperature should not be near freezing. It should be 10–15℃, which for Americans is 50–59℉.
You can get a bath thermometer to check this, by the way. Here’s an example product on Amazon.
Secondly, your ice bath should last no more than 10–15 minutes. This is not a place to go to sleep.
What chronic diseases would make it dangerous?
Do check with your doctor if you have any doubts, as no list we make can be exhaustive and we don’t know your personal medical history, but the main culprits are:
- Cardiovascular disease
- Hypertension
- Diabetes (any type)
The first two are for heart attack risk; the latter is because diabetes can affect core temperature regulation.
Ice baths are good for the heart: True or False?
True or False depending on how they’re done, and your health before starting.
For most people, undertaking ice baths responsibly, repeated ice bath use causes the cardiovascular system to adapt to better maintain homeostasis when subjected to thermal shock (i.e. sudden rapid changes in temperature).
For example: Respiratory and cardiovascular responses to cold stress following repeated cold water immersion
And because that was a small study, here’s a big research review with a lot of data; just scroll to where it has the heading“Specific thermoregulative adaptations to regular exposure to cold air and/or cold water exposure“ for many examples and much discussion:
Health effects of voluntary exposure to cold water: a continuing subject of debate
Ice baths are good against inflammation: True or False?
True! Here’s one example:
Uric acid and glutathione levels (important markers of chronic inflammation) are also significantly affected:
Uric acid and glutathione levels during short-term whole body cold exposure
Want to know more?
That’s all we have room for today, but check out our previous “Expert Insights” main feature looking at Wim Hof’s work in cryotherapy:
A Cold Shower A Day Keeps The Doctor Away?
Enjoy!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
5 Things You Can Change About Your Personality (But: Should You?)
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
There are many personality-typing systems that, with varying degrees of validity*, aim to describe a person’s personality.
*and often pseudoscience:
- sometimes obviously so like astrology
- sometimes dressed up in clinical words like the Meyers-Briggs
- sometimes openly, per “this is not science but you may find it useful to frame things this way”, like the Enneagram
There is currently one kind of personality-typing system (with some minor variations) that is used in the actual field of clinical psychology, specifically under the umbrella of “trait theory”, and that is…
The “Big Five” personality traits
Also called the OCEAN or CANOE model, based on its 5 components:
- openness to experience: inventive/curious rather than consistent/cautious
- conscientiousness: efficient/organized rather than extravagant/careless
- extroversion: outgoing/energetic rather than solitary/reserved
- agreeableness: friendly/compassionate rather than critical/judgmental
- neuroticism: sensitive/nervous rather than resilient/confident
The latter (neuroticism) is not to be confused with neurosis, which is very different and beyond the scope of today’s article.
Note that some of these seem more positive/negative than others at a glance, but really, any of these could be a virtue or a vice depending on specifics or extremity.
For scientific reference, here’s an example paper:
The Big Five Personality Factors and Personal Values
Quick self-assessment
There are of course many lengthy questionnaires for this, but in the interests of expediency:
Take a moment to rate yourself as honestly as you can, on a scale of 1–10, for each of those components, with 10 being highest for the named trait.
For example, this writer gives herself: O7, C6, E3, A8, N2 (in other words I’d say I’m fairly open, moderately conscientious, on the reserved side, quite agreeable, and quite resilient)
Now, put your rating aside (in your phone’s notes app is fine, if you hadn’t written it down already) and forget about it for the moment, because we want you to do the next exercise from scratch.
Who would you be, at your best?
Now imagine your perfect idealized self, the best you could ever be, with no constraints.
Take a moment to rate your idealized self’s personality, on a scale of 1–10, for each of those components, with 10 being highest for the named trait.
For example, this writer picks: O9, C10, E5, A8, N1.
Maybe this, or maybe your own idealized self’s personality, will surprise you. That some traits might already be perfect for you already; others might just be nudged a little here or there; maybe there’s some big change you’d like. Chances are you didn’t go for a string of 10s or 1s (though if you did, you do you; there are no wrong answers here as this one is about your preferences).
We become who we practice being
There are some aspects of personality that can naturally change with age. For example:
- confidence/resilience will usually gradually increase with age due to life experience (politely overlook teenagers’ bravado; they are usually a bundle of nerves inside, resulting in the overcompensatory displays of confidence)
- openness to experience may decrease with age, as we can get into a rut of thinking/acting a certain way, and/or simply consciously decide that our position on something is already complete and does not need revision.
But, we can decide for ourselves how to nudge our “Big Five” traits, for example:
- We can make a point of seeking out new experiences, and considering new ideas, or develop strategies for reining ourselves in
- We can use systems to improve our organization, or go out of our way to introduce a little well-placed chaos
- We can “put ourselves out there” socially, or make the decision to decline more social invitations because we simply don’t want to
- We can make a habit of thinking kindly of others and ourselves, or we can consciously detach ourselves and look on the cynical side more
- We can build on our strengths and eliminate our weaknesses, or lean into uncomfortable emotions
Some of those may provoke a “why would anyone want to…?” response, but the truth is we are all different. An artist and a police officer may have very different goals for who they want to be as a person, for example.
Interventions to change personality can and do work:
A systematic review of personality trait change through intervention
There are many ways to go about “being the change we want to see” in ourselves, and yes there can be a degree of “fake it until you make it” if that works for you, but it doesn’t have to be so. It can also simply be a matter of setting yourself reminders about the things that are most important to you.
Writer’s example: pinned above my digital workspace I have a note from my late beloved, written just under a week before death. The final line reads, “keep being the good person that you are” (on a human level, the whole note is uplifting and soothing to me and makes me smile and remember the love we shared; or to put it in clinical terms, it promotes high agreeableness, low neuroticism).
Other examples could be a daily practice of gratitude (promotes lower neuroticism), or going out of your way to speak to your neighbors (promotes higher extraversion), signing up for a new educational course (promotes higher openness) or downloading a budgeting app (promotes higher conscientiousness).
In short: be the person you want to be, and be that person deliberately, because you can.
Some resources that may help for each of the 5 traits:
- Curiosity Kills The Neurodegeneration
- How (And Why) To Train Your Pre-Frontal Cortex
- How To Beat Loneliness & Isolation
- Optimism Seriously Increases Longevity!
- Building Psychological Resilience (Without Undue Hardship)
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
Lower Your Cortisol! (Here’s Why & How)
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Cortisol, or “the stress hormone” to its friends, is produced by your adrenal glands, and is generally considered “not fun”.
It does serve a purpose, of course, just like almost everything else our body does. It serves as part of the “fight or flight” response, for example, and helps you to wake up in the morning.
While you do need some cortisol (and a small percentage of people have too little), most of us have too much.
Why? Simply put, modern life is not what 200,000* years of human evolution prepared us for:
- Agriculture (which allowed us to settle down and cease being nomadic) happened during the last 6% of those 200,000 years.
- The Industrial Revolution and the onset of modern capitalism happened during only during the last 0.1% of those 200,000 years.
*the 200,000 years figure is conservative and doesn’t take into account the 200,000,000 years of pre-hominid mammalian evolution. Doing so, on the basis of the mammalian brain & physiology being what’s important here, means our modern stressors have been around for <0.0001% of the time we have.
So guess what, our bodies haven’t caught up. As far as our bodies are concerned, we are supposed to be enjoying the sunshine of grassy plains and the shade of woodland while eating fruit.
- When the alarm clock goes off, our body panics and prepares us to either flee or help fight the predator, because why else would we have been woken so?
- When we have a pressing deadline for work, our brain processes this as “if we don’t do this, we will literally starve and die”.
- When people are upset or angry with us, there’s a part of our brain that fears exile from the tribe and resultant death.
…and so on.
Health Risks of High Cortisol
The long-term stressors are the biggest issue for health. Unless you have a heart condition or other relevant health problem, almost anyone can weather a brief unpleasant surprise. But if something persists? That prompts the body to try to protect you, bless it. The body’s attempts backfire, because…
- One way it does this by making sure to save as much food as possible in the form of body fat
- It’ll also increase your appetite, to make sure you eat anything you can while you still can
- It additionally tries to protect you by keeping you on the brink of fight-or-flight readiness, e.g:
- High blood pressure
- High blood sugar levels
- Rapid mood changes—gotta be able to do those heel-turns as necessary and react quickly to any possible threat!
Suffice it to say, these things are not good for your long-term health.
That’s the “Why”—now here’s the “How”:
Lowering your cortisol levels mostly means lowering your stress and/or lowering your stress response. We previously gave some powerful tools for lowering anxiety, which for these purposes amounts to the same thing.
However, we can also make nutritional and lifestyle changes that will reduce our cortisol levels, for example:
- Reduce (ideally: eliminate from your lifestyle) caffeine
- Reduce (ideally: eliminate from your lifestyle) alcohol
- Yes, really. While many understandably turn to alcohol specifically to help manage stress, it only makes it worse long-term.
- Additionally, alcohol directly stimulates cortisol production, counterintuitive as that may be.
Read: Alcohol, Aging, and the Stress Response ← full article (with 37 sources of its own) from the NYMC covering how alcohol stimulates cortisol production and what that means for us
As well as reductions/eliminations, are some things you can add into your lifestyle that will help!
We’ve written previously about some:
Read: Ashwagandha / Read: L-Theanine / Read: CBD Oil
Other things include, no surprises here:
- The Mediterranean diet (nutritious and delicious): https://10almonds.com/mediterranean-diet
- Get 7–9 hours (good quality!) sleep per night: https://10almonds.com/time-pillow-talk
- Get regular exercise (the regularity matters most!): https://10almonds.com/keep-on-keeping-on
Progressive Relaxation
We’ll give this one its own section because we’ve not talked about it before. Maybe you’re familiar. If not, then in a nutshell: progressive relaxation means progressively tensing and then relaxing each part of your body in turn.
Why does this work? Part of it is just a physical trick involving biofeedback and the natural function of muscles to contract and relax in turn, but the other part is even cleverer:
It basically tricks the most primitive part of your brain, the limbic system, into thinking you had a fight and won, telling it “thank you very much for the cortisol but we don’t need it anymore”.
Take a Hike! Or a Stroll… You Do You!
Last but not least: go connect with your roots. Spend time in the park, or at least the garden. Have a picnic, if the weather suits. Go somewhere you can spend time around leafy green things under a blue sky (we realize the blue sky may be subject to availability in some locations, but do what you can!).
Remember also: just as your body’s responses will be tricked by the alarm clock or the housework, they will also be easily tricked by blue and green stuff around you. If a sunny garden isn’t available in your location, a picture of one as your desktop background is the next best thing.
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
