Air Purifiers & Sleep
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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
❝I’ve read that air pollution has a negative effect on sleep quality and duration. Since I live next to a busy road, I was wondering whether I should invest in an air purifier. What are 10Almonds’s views?❞
Going straight to the science, there are two questions here:
- Does air pollution negatively affect sleep quality and duration?
- Does the use of an air purify actually improve the air quality in the way(s) necessary to make a difference?
We thought we’d have to tackle these questions separately, but we did find one study that addressed your question directly. It was a small study (n=30 if you believe the abstract; n=29 if you read the paper itself—one person dropped out); the results were modest but clear:
❝The purifier filter was associated with increased total sleep time for an average of 12 min per night, and increased total time in bed for an average of 19 min per night relative to the placebo.
There were several sleep and mood outcomes for which no changes were observed, and time awake after sleep onset was higher for the purifier filter. Air quality was better during the high-efficiency particulate air filter condition.
These findings offer positive indications that environmental interventions that improve air quality can have benefits for sleep outcomes in healthy populations who are not exhibiting clinical sleep disturbances.❞
In the above-linked paper’s introduction, it does establish the deleterious effect of air pollution on a wide variety of health metrics, including sleep, this latter evidenced per Caddick et al. (2018): A review of the environmental parameters necessary for an optimal sleep environment
Now, you may be wondering: is an extra 12 minutes per night worth it?
That’s your choice to make, but we would argue that it is. We can make many choices in our lives that affect our health slightly for the better or the worse. If we make a stack of choices in a particular direction, the effects will also stack, if not outright compound.
So in the case of sleep, it might be (arbitrary numbers for the sake of illustration):
- Get good exercise earlier in the day (+3%)
- Get good food earlier in the day (+2.5%)
- Practice mindfulness/meditation before bed (+2.5%)
- Have a nice dark room (+5%)
- Have fresh bedding (+2.5%)
- Have an air purifier running (+3%)
Now, those numbers are, as we said, arbitrary*, but remember that percentages don’t add up; they compound. So that “+3%” starts being a lot more meaningful than if it were just by itself.
*Confession: the figure of 3% for the air purifier wasn’t entirely arbitrary; it was based on 100(12/405) = 80/27 ≈ 3, wherein the 405 figure was an approximation of the average total time (in minutes) spent sleeping with placebo, based on a peep at their results graph. There are several ways the average could be reasonably calculated, but 6h45 (i.e., 405 minutes) was an approximate average of those reasonable approximate averages.
So, 12 minutes is a 3% improvement on that.
Don’t have an air purifier and want one?
We don’t sell them, but here’s an example on Amazon, for your convenience
Take care!
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Can Saturated Fats Be Healthy?
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Saturated Fat: What’s The Truth?
We asked you for your health-related opinion of saturated fat, and got the above-pictured, below-described, set of results.
- Most recorded votes were for “Saturated fat is good, but only some sources, and/or in moderation”
- This is an easy one to vote for, because of the “and/or in moderation” part, which tends to be a “safe bet” for most things.
- Next most popular was “Saturated fat is terrible for the health and should be avoided”
- About half as many recorded votes were for “I’m not actually sure what makes saturated fat different”, which is a very laudable option to click. Admitting when we don’t know things (and none of us know everything) is a very good first step to learning about them!
- Fewest recorded votes were for “Saturated fat is the best source of energy; we should get plenty”.
So, what does the science say?
First, a bit of physics, chemistry, and biology
You may be wondering what, exactly, saturated fats are “saturated” with. That’s a fair question, so…
All fats have a molecular structure made up of carbon, hydrogen, and oxygen atoms. Saturated fats are saturated with hydrogen, and thus have only single bonds between carbon atoms (unsaturated fats have at least one double-bond between carbon atoms).
The observable effect this has on them, is that fats that are saturated with hydrogen are solid at room temperature, whereas unsaturated fats are liquid at room temperature. Their different properties also make for different interactions inside the human body, including how likely or not they are to (for example) clog arteries.
See also: Could fat in your bloodstream cause blood clots?
Saturated fat is the best source of energy; we should get plenty: True or False?
False, in any reasonable interpretation, anyway. That is to say, if your idea of “plenty” is under 13g (e.g: two tablespoons of butter, and no saturated fat from other sources, e.g. meat) per day, then yes, by all means feel free to eat plenty. More than that, though, and you might want to consider trimming it down a bit.
The American Heart Association has this to say:
❝When you hear about the latest “diet of the day” or a new or odd-sounding theory about food, consider the source.
The American Heart Association recommends limiting saturated fats, which are found in butter, cheese, red meat and other animal-based foods, and tropical oils.
Decades of sound science has proven it can raise your “bad” cholesterol and put you at higher risk for heart disease.❞
Source: The American Heart Association Diet and Lifestyle Recommendations on Saturated Fat
The British Heart Foundation has a similar statement:
❝Despite what you read in the media, our advice is clear: replace saturated fats with unsaturated fats and avoid trans fats. Saturated fat is the kind of fat found in butter, lard, ghee, fatty meats and cheese. This is linked to an increased risk of heart and circulatory disease❞
Source: British Heart Foundation: What does fat do and what is saturated fat?
As for the World Health Organization:
❝1. WHO strongly recommends that adults and children reduce saturated fatty acid intake to 10% of total energy intake
2. WHO suggests further reducing saturated fatty acid intake to less than 10% of total energy intake
3. WHO strongly recommends replacing saturated fatty acids in the diet with polyunsaturated fatty acids; monounsaturated fatty acids from plant sources; or carbohydrates from foods containing naturally occurring dietary fibre, such as whole grains, vegetables, fruits and pulses.❞
Source: Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline
Please note, organizations such as the AHA, the BHF, and the WHO are not trying to sell us anything, and just would like us to not die of heart disease, the world’s #1 killer.
As for “the best source of energy”…
We evolved to eat (much like our nearest primate cousins) a diet consisting mostly of fruits and other edible plants, with a small supplementary amount of animal-source protein and fats.
That’s not to say that because we evolved that way we have to eat that way—we are versatile omnivores. But for example, we are certainly not complete carnivores, and would quickly sicken and die if we tried to live on only meat and animal fat (we need more fiber, more carbohydrates, and many micronutrients that we usually get from plants)
The closest that humans tend to come to doing such is the ketogenic diet, which focuses on a high fat, low carbohydrate imbalance, to promote ketosis, in which the body burns fat for energy.
The ketogenic diet does work, and/but can cause a lot of health problems if a lot of care is not taken to avoid them.
See for example: 7 Keto Risks To Keep In Mind
Saturated fat is terrible for the health and should be avoided: True or False?
False, if we are talking about “completely”.
Firstly, it’s practically impossible to cut out all saturated fats, given that most dietary sources of fat are a mix of saturated, unsaturated (mono- and poly-), and trans fats (which are by far the worst, but beyond the scope of today’s main feature).
Secondly, a lot of research has been conducted and found insignificant or inconclusive results, in cases where saturated fat intake was already within acceptable levels (per the recommendations we mentioned earlier), and then cut down further.
Rather than fill up the newsletter with individual studies of this kind here’s a high-quality research review, looking at 19 meta-analyses, each of those meta-analyses having looked at many studies:
Dietary saturated fat and heart disease: a narrative review
Saturated fat is good, but only some sources, and/or in moderation: True or False?
True! The moderation part is easy to guess, so let’s take a look at the “but only some sources”.
We were not able to find any convincing science to argue for health-based reasons to favor plant- or animal-sourced saturated fat. However…
Not all saturated fats are created equal (there are many kinds), and also many of the foods containing them have additional nutrients, or harmful compounds, that make a big difference to overall health, when compared gram-for-gram in terms of containing the same amount of saturated fat.
For example:
- Palm oil’s saturated fat contains a disproportionate amount of palmitic acid, which raises LDL (“bad” cholesterol) without affecting HDL (“good” cholesterol), thus having an overall heart-harmful effect.
- Most animal fats contain a disproportionate amount of stearic acid, which has statistically insignificant effects on LDL and HDL levels, and thus is broadly considered “heart neutral” (in moderation!)
- Coconut oil’s saturated fat contains a disproportionate amount of lauric acid, which raises total cholesterol, but mostly HDL without affecting LDL, thus having an overall heart-beneficial effect (in moderation!)
Do you know what’s in the food you eat?
Test your knowledge with the BHF’s saturated fat quiz!
Enjoy!
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- Most recorded votes were for “Saturated fat is good, but only some sources, and/or in moderation”
How to Stop Negative Thinking – by Daniel Paul
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.
Just think positive thoughts” is all well and good, but it doesn’t get much mileage in the real world, does it?
What Daniel Paul offers is a lot better than that. Taking a CBT approach, he recommends tips and tricks, gives explanations and exercises, and in short, puts tools in the reader’s toolbox.
But it doesn’t stop at just stopping negative thinking. Rather, it takes a holistic approach to also improve your general life…
- Bookending your day with a good start and finish
- Scheduling a time for any negative thinking that does need to occur (again with the useful realism!)
- Inviting the reader to take on small challenges, of the kind that’ll have knock-on effects that add and multiply and compound as we go
The format is very easy-reading, and we love that there are clear section headings and chapter summaries, too.
Bottom line: definitely a book with the potential to improve your life from day one, and that’ll keep you coming back to it as a cheatsheet and references source.
Get your copy of “How to Stop Negative Thinking” from Amazon today!
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7 Essential Devices For Hand Arthritis: Regain Control of Your Life
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Dr. Diana Girnita is a double board-certified physician in rheumatology and internal medicine. With a PhD in immunology (on top of her MD), and training at Harvard and top universities, she founded Rheumatologist OnCall, offering integrative medicine to broaden rheumatology access. Here’s what she has to say about things that make life easier:
Get your hands on these…
The seven devices that Dr. Girnita recommends are:
- Hand grip strengthener: helps build grip strength with a spring-loaded mechanism. Regular use can improve strength and reduce pain.
- Finger exerciser: different device; similar principle: it strengthens hand and finger muscles using resistance, enhancing hand function.
- Moisturizing paraffin bath: a heated paraffin wax bath that soothes hands, providing heat therapy and moisturizing the skin.
- Weighted silverware: weighted utensils (knives, forks, spoons) make gripping easier and provide stability for eating.
- Foam tubing grips: foam covers to make kitchen tools, toothbrushes, and hairbrushes easier to grip.
- Electric can-opener: reduces strain in opening cans, making meal preparation more accessible.
- Compression gloves: provide gentle compression to reduce swelling and pain, improving hand flexibility and circulation.
- Door knob cover grips: make it easier to turn doorknobs by providing a larger surface to grip.
- Wider-grip pens: ergonomically designed pens with a larger diameter and softer grip reduce hand strain while writing.
This writer, who does not have arthritis but also does not have anything like the grip strength she used to, also recommends a jar opener like this one.
As a bonus, if you spend a lot of time writing at a computer, an ergonomic split keyboard like this one goes a long way to avoiding carpal tunnel syndrome, and logically must be better for arthritis than a regular keyboard; another excellent thing to have (that again this writer uses and swears by) is an ergonomic vertical mouse like this one (aligns the wrist bones correctly; the “normal” horizontal version is woeful for the carpal bones). These things are both also excellent to help avoid worsening peripheral neuropathy (something that troubles this writer’s wrists if she’s not careful, due to old injuries there).
For more on the seven things otherwise listed above, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- Avoiding/Managing Rheumatoid Arthritis
- Avoiding/Managing Osteoarthritis
- Managing Chronic Pain (Realistically!)
Take care!
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Watch Out For Lipedema
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.
Lipedema occurs mostly in women, mostly in times of hormonal change, with increasing risk as time goes by (so for example, puberty yields a lower risk than pregnancy, which yields a lower risk than menopause).
Its name literally means “fat swelling”, and can easily be mistaken for obesity or, in its earlier stages, just pain old cellulite.
Cellulite, by the way, is completely harmless and is also not, per se, an indicator of bad health. But if you have it and don’t like it, you can reduce it:
Obesity is more of a complex matter, and one that we’ve covered here:
Lipedema is actively harmful
Lipedema can become a big problem, because lifestyle change does not reduce lipedema fat, the fat is painful, can lead to obesity if one was not already obese, causes gait and joint abnormalities, causes fatigue, can lead to lymphedema (beyond the scope of today’s article—perhaps another time!) and very much psychosocial distress.
Like many conditions that mostly affect women, the science is… Well, here’s a recent example review that was conducted and published:
Fun fact: in Romanian there is an expression “one eye is laughing; the other is crying”, and it seems appropriate here.
Spot the signs
Because it’s most readily mistaken for cellulite in first presentation, let’s look at the differences between them:
- Cellulite is characterized by dimpled, bumpy, or even skin; lipedema is the same but with swelling too.
- Cellulite is a connective tissue condition; lipedema is too (at least in part), but also involves the abnormal accumulation and deposition of fat cells, rather than just pulling some down a bit.
- Cellulite has no additional symptoms; lipedema soon also brings swollen limbs, joint pain, and/or skin that’s “spongy” and easily bruised.
What to do about it
First, get it checked out by a doctor.
If the doctor says it is just cellulite or obesity, ask them what difference(s) they are basing that on, and ask that they confirm in writing having dismissed your concerns (having this will be handy later if it turns out to be lipedema after all).
If it is lipedema, you will want to catch it early; there is no known cure, but advanced symptoms are a lot easier to keep at bay than they are to reverse once they’ve shown up.
Weight maintenance, skin care (including good hydration), and compression therapy have all been shown to help slow the progression.
If it is allowed to progress unhindered, that’s when a lot more fat accumulation and joint pain is likely to occur. Liposuction and surgery are options, but even they are only a temporary solution, and are obviously not fun things to have to go through.
Prevention is, as ever, much better than
curetreatment ← because there is no known cureOne last thing
Lipedema’s main risk factor is genetic. The bad news is, there’s not much that can be done about that for now, but the good news is, you can at least get the heads-up about whether you are at increased risk or not, and be especially vigilant if you’re in the increased risk group. See also:
One Test, Many Warnings: The Real Benefit Of Genetic Testing
Take care!
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The Vagus Nerve’s Power for Weight Loss
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Dr. Arun Dhir is a university lecturer, a gastrointestinal surgeon, an author, and a yoga and meditation instructor, and he has this to say:
Gut feelings
The vagus nerve is the 10th cranial nerve, also known as “vagus” (“the wanderer”), because it travels from the brain to many other body parts, including the ears, throat, heart, respiratory system, gut, pancreas, liver, and reproductive system. It’s no surprise then, that it plays a key role in brain-gut communication and metabolism regulation.
The vagus nerve is part of the parasympathetic nervous system, responsible for rest, digestion, and counteracting the stress response. Most signals through the vagus nerve travel from the gut to the brain, though there is communication in both directions.
You may be beginning to see how this works and its implications for weight management: the vagus nerve senses metabolites from the liver, pancreas, and small intestine, and regulates insulin production by stimulating beta cells in the pancreas, which is important for avoiding/managing insulin resistance and metabolic syndrome in general.
Dr. Dhir cites a study in which vagus nerve stimulation (originally used for treating epilepsy and depression) was shown to cause unintentional weight loss (6-11%) in patients, revealing a link to weight management. Of course, that is quite a specific sample, so more research is needed to say for sure, but because the principle is very sound and the mechanism of action is clear, it’s not being viewed as a controversial conclusion.
As for how get these benefits, here are seven ways:
- Cold water on the face: submerge your face in cold water in the morning while holding water in your mouth, or cover your face with a cold wet washcloth (while holding your breath please; no need to waterboard yourself!), which activates the “mammalian dive response” in which your body activates the parasympathetic nervous system in order to remain calm and thus survive for longer underwater
- Alternate hot and cold showers: switch between hot and cold water during showers for 10-second intervals; this creates eustress and activates the process of hormesis, improving your overall stress management and reducing any chronic stress response you may otherwise have going on
- Humming and gargling: the vibrations in the throat stimulate the nearby vagus nerve
- Deep breathing (pranayama): yoga breathing exercises, especially combined with somatic exercises such as the sun salutation, can stimulate the vagus nerve
- Intermittent fasting: helps recalibrate the metabolism and indirectly improves vagus nerve function
- Massage and acupressure: stimulates lymphatic channels and the vagus nerve
- Long walks in nature (“forest bathing”): helps trigger relaxation in general
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:
The Vagus Nerve (And How You Can Make Use Of It)
Take care!
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What happens to your vagina as you age?
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The vagina is an internal organ with a complex ecosystem, influenced by circulating hormone levels which change during the menstrual cycle, pregnancy, breastfeeding and menopause.
Around and after menopause, there are normal changes in the growth and function of vaginal cells, as well as the vagina’s microbiome (groups of bacteria living in the vagina). Many women won’t notice these changes. They don’t usually cause symptoms or concern, but if they do, symptoms can usually be managed.
Here’s what happens to your vagina as you age, whether you notice or not.
Let’s clear up the terminology
We’re focusing on the vagina, the muscular tube that goes from the external genitalia (the vulva), past the cervix, to the womb (uterus). Sometimes the word “vagina” is used to include the external genitalia. However, these are different organs and play different roles in women’s health.
What happens to the vagina as you age?
Like many other organs in the body, the vagina is sensitive to female sex steroid hormones (hormones) that change around puberty, pregnancy and menopause.
Menopause is associated with a drop in circulating oestrogen concentrations and the hormone progesterone is no longer produced. The changes in hormones affect the vagina and its ecosystem. Effects may include:
- less vaginal secretions, potentially leading to dryness
- less growth of vagina surface cells resulting in a thinned lining
- alteration to the support structure (connective tissue) around the vagina leading to less elasticity and more narrowing
- fewer blood vessels around the vagina, which may explain less blood flow after menopause
- a shift in the type and balance of bacteria, which can change vaginal acidity, from more acidic to more alkaline.
What symptoms can I expect?
Many women do not notice any bothersome vaginal changes as they age. There’s also little evidence many of these changes cause vaginal symptoms. For example, there is no direct evidence these changes cause vaginal infection or bleeding in menopausal women.
Some women notice vaginal dryness after menopause, which may be linked to less vaginal secretions. This may lead to pain and discomfort during sex. But it’s not clear how much of this dryness is due to menopause, as younger women also commonly report it. In one study, 47% of sexually active postmenopausal women reported vaginal dryness, as did around 20% of premenopausal women.
Other organs close to the vagina, such as the bladder and urethra, are also affected by the change in hormone levels after menopause. Some women experience recurrent urinary tract infections, which may cause pain (including pain to the side of the body) and irritation. So their symptoms are in fact not coming from the vagina itself but relate to changes in the urinary tract.
Not everyone has the same experience
Women vary in whether they notice vaginal changes and whether they are bothered by these to the same extent. For example, women with vaginal dryness who are not sexually active may not notice the change in vaginal secretions after menopause. However, some women notice severe dryness that affects their daily function and activities.
In fact, researchers globally are taking more notice of women’s experiences of menopause to inform future research. This includes prioritising symptoms that matter to women the most, such as vaginal dryness, discomfort, irritation and pain during sex.
If symptoms bother you
Symptoms such as dryness, irritation, or pain during sex can usually be effectively managed. Lubricants may reduce pain during sex. Vaginal moisturisers may reduce dryness. Both are available over-the-counter at your local pharmacy.
While there are many small clinical trials of individual products, these studies lack the power to demonstrate if they are really effective in improving vaginal symptoms.
In contrast, there is robust evidence that vaginal oestrogen is effective in treating vaginal dryness and reducing pain during sex. It also reduces your chance of recurrent urinary tract infections. You can talk to your doctor about a prescription.
Vaginal oestrogen is usually inserted using an applicator, two to three times a week. Very little is absorbed into the blood stream, it is generally safe but longer-term trials are required to confirm safety in long-term use beyond a year.
Women with a history of breast cancer should see their oncologist to discuss using oestrogen as it may not be suitable for them.
Are there other treatments?
New treatments for vaginal dryness are under investigation. One avenue relates to our growing understanding of how the vaginal microbiome adapts and modifies around changes in circulating and local concentrations of hormones.
For example, a small number of reports show that combining vaginal probiotics with low-dose vaginal oestrogen can improve vaginal symptoms. But more evidence is needed before this is recommended.
Where to from here?
The normal ageing process, as well as menopause, both affect the vagina as we age.
Most women do not have troublesome vaginal symptoms during and after menopause, but for some, these may cause discomfort or distress.
While hormonal treatments such as vaginal oestrogen are available, there is a pressing need for more non-hormonal treatments.
Dr Sianan Healy, from Women’s Health Victoria, contributed to this article.
Louie Ye, Clinical Fellow, Department of Obstetrics and Gynecology, The University of Melbourne and Martha Hickey, Professor of Obstetrics and Gynaecology, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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