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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Decoding Hormone Balancing in Ads
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It’s Q&A Time!
This is the bit whereby each week, we respond to subscriber questions/requests/etc
Have something you’d like to ask us, or ask us to look into? Hit reply to any of our emails, or use the feedback widget at the bottom, and a Real Human™ will be glad to read it!
Q: As to specific health topics, I would love to see someone address all these Instagram ads targeted to women that claim “You only need to ‘balance your hormones’ to lose weight, get ripped, etc.” What does this mean? Which hormones are they all talking about? They all seem to be selling a workout program and/or supplements or something similar, as they are ads, after all. Is there any science behind this stuff or is it mostly hot air, as I suspect?
Thank you for asking this, as your question prompted yesterday’s main feature, What Does “Balancing Your Hormones” Even Mean?
That’s a great suggestion also about addressing ads (and goes for health-related things in general, not just hormonal stuff) and examining their claims, what they mean, how they work (if they work!), and what’s “technically true but may
be misleading* cause confusion”*We don’t want companies to sue us, of course.
Only, we’re going to need your help for this one, subscribers!
See, here at 10almonds we practice what we preach. We limit screen time, we focus on our work when working, and simply put, we don’t see as many ads as our thousands of subscribers do. Also, ads tend to be targeted to the individual, and often vary from country to country, so chances are good that we’re not seeing the same ads that you’re seeing.
So, how about we pull together as a bit of a 10almonds community project?
- Step 1: add our email address to your contacts list, if you haven’t already
- Step 2: When you see an ad you’re curious about, select “share” (there is usually an option to share ads, but if not, feel free to screenshot or such)
- Step 3: Send the ad to us by email
We’ll do the rest! Whenever we have enough ads to review, we’ll do a special on the topic.
We will categorically not be able to do this without you, so please do join in—Many thanks in advance!
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Fast-Pickled Cucumbers
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Pickled vegetables are great for the gut, and homemade is invariably better than store-bought. But if you don’t have pickling jars big enough for cucumbers, and don’t want to wait a couple of weeks for the results, here’s a great way to do it quickly and easily.
You will need
- 1 large cucumber, sliced
- 2 tbsp apple cider vinegar
- 1½ tbsp salt (do not omit or substitute)
- 3 cloves garlic, whole, peeled
- 3 large sprigs fresh dill
- 2 tsp whole black peppercorns
- ½ tsp crushed red pepper flakes
- 1 bay leaf
Method
(we suggest you read everything at least once before doing anything)
1) Mix the vinegar and salt with 1½ cups of water in a bowl.
2) Assemble the rest of the ingredients, except the cucumber, into a quart-size glass jar with an airtight lid.
3) Add the cucumber slices into the jar.
4) Add the pickling brine that you made, leaving ½” space at the top.
5) Close the lid, and shake well.
6) Refrigerate for 2 days, after which, serve at your leisure:
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Making Friends With Your Gut (You Can Thank Us Later)
- Our Top 5 Spices: How Much Is Enough For Benefits? ← 3/5 of these spices are in this recipe!
Take care!
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Vit D + Calcium: Too Much Of A Good Thing?
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Vit D + Calcium: Too Much Of A Good Thing?
- Myth: you can’t get too much calcium!
- Myth: you must get as much vitamin D as possible!
Let’s tackle calcium first:
❝Calcium is good for you! You need more calcium for your bones! Be careful you don’t get calcium-deficient!❞
Contingently, those comments seem reasonable. Contingently on you not already having the right amount of calcium. Most people know what happens in the case of too little calcium: brittle bones, osteoporosis, and so forth.
But what about too much?
Hypercalcemia
Having too much calcium—or “hypercalcemia”— can lead to problems with…
- Groans: gastrointestinal pain, nausea, and vomiting. Peptic ulcer disease and pancreatitis.
- Bones: bone-related pains. Osteoporosis, osteomalacia, arthritis and pathological fractures.
- Stones: kidney stones causing pain.
- Moans: refers to fatigue and malaise.
- Thrones: polyuria, polydipsia, and constipation
- Psychic overtones: lethargy, confusion, depression, and memory loss.
(mnemonic courtesy of Sadiq et al, 2022)
What causes this, and how do we avoid it? Is it just dietary?
It’s mostly not dietary!
Overconsumption of calcium is certainly possible, but not common unless one has an extreme diet and/or over-supplementation. However…
Too much vitamin D
Again with “too much of a good thing”! While keeping good levels of vitamin D is, obviously, good, overdoing it (including commonly prescribed super-therapeutic doses of vitamin D) can lead to hypercalcemia.
This happens because vitamin D triggers calcium absorption into the gut, and acts as gatekeeper to the bloodstream.
Normally, the body only absorbs 10–20% of the calcium we consume, and that’s all well and good. But with overly high vitamin D levels, the other 80–90% can be waved on through, and that is very much Not Good™.
See for yourself:
- Hypercalcemia of Malignancy: An Update on Pathogenesis and Management
- Vitamin D-Mediated Hypercalcemia: Mechanisms, Diagnosis, and Treatment
How much is too much?
The United States’ Office of Dietary Supplements defines 4000 IU (100μg) as a high daily dose of vitamin D, and recommends 600 IU (15μg) as a daily dose, or 800 IU (20μg) if aged over 70.
See for yourself: Vitamin D Fact Sheet for Health Professionals ← there’s quite a bit of extra info there too
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Tomato vs Cucumber – Which is Healthier?
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Our Verdict
When comparing tomato to cucumber, we picked the tomato.
Why?
Both are certainly great, but there are some nutritional factors between them:
In terms of macros, everything is approximately equal except that tomato has more than 2x the fiber, so that’s a win for tomato.
When it comes to vitamins, tomatoes have more of vitamins A, B1, B3, B6, B9, C, E, and choline, while cucumber has more of vitamins B2, B5, and K. In short, an 8:3 victory for tomatoes.
In the category of minerals, tomatoes have more copper, potassium, and manganese, while cucumber has more calcium, iron, magnesium, selenium, and zinc. So, a win for cucumber this time.
Both have useful phytochemical properties, too; tomatoes are rich in lycopene which has many benefits, and cucumbers have powerful anti-inflammatory powers whose mechanism of action is not yet fully understood—see the links below for more details!
All in all, enjoy either or both (they make a great salad chopped roughly together with some olives, a little garlic, and a drizzle of olive oil and balsamic vinegar with a twist or three of black pepper), but if you have to pick just one (what a cruel world), we say the tomato has the most benefits, on balance.
Want to learn more?
You might like to read:
- Lycopene’s Benefits For The Gut, Heart, Brain, & More
- Cucumber Extract Beats Glucosamine & Chondroitin… At 1/135th Of The Dose?!
Take care!
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Strength training has a range of benefits for women. Here are 4 ways to get into weights
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Picture a gym ten years ago: the weights room was largely a male-dominated space, with women mostly doing cardio exercise. Fast-forward to today and you’re likely to see women of all ages and backgrounds confidently navigating weights equipment.
This is more than just anecdotal. According to data from the Australian Sports Commission, the number of women participating in weightlifting (either competitively or not) grew nearly five-fold between 2016 and 2022.
Women are discovering what research has long shown: strength training offers benefits beyond sculpted muscles.
Health benefits
Osteoporosis, a disease in which the bones become weak and brittle, affects more women than men. Strength training increases bone density, a crucial factor for preventing osteoporosis, especially for women negotiating menopause.
Strength training also improves insulin sensitivity, which means your body gets better at using insulin to manage blood sugar levels, reducing the risk of type 2 diabetes. Regular strength training contributes to better heart health too.
There’s a mental health boost as well. Strength training has been linked to reduced symptoms of depression and anxiety.
Improved confidence and body image
Unlike some forms of exercise where progress can feel elusive, strength training offers clear and tangible measures of success. Each time you add more weight to a bar, you are reminded of your ability to meet your goals and conquer challenges.
This sense of achievement doesn’t just stay in the gym – it can change how women see themselves. A recent study found women who regularly lift weights often feel more empowered to make positive changes in their lives and feel ready to face life’s challenges outside the gym.
Strength training also has the potential to positively impact body image. In a world where women are often judged on appearance, lifting weights can shift the focus to function.
Instead of worrying about the number on the scale or fitting into a certain dress size, women often come to appreciate their bodies for what they can do. “Am I lifting more than I could last month?” and “can I carry all my groceries in a single trip?” may become new measures of physical success.
Lifting weights can also be about challenging outdated ideas of how women “should” be. Qualitative research I conducted with colleagues found that, for many women, strength training becomes a powerful form of rebellion against unrealistic beauty standards. As one participant told us:
I wanted something that would allow me to train that just didn’t have anything to do with how I looked.
Society has long told women to be small, quiet and not take up space. But when a woman steps up to a barbell, she’s pushing back against these outdated rules. One woman in our study said:
We don’t have to […] look a certain way, or […] be scared that we can lift heavier weights than some men. Why should we?
This shift in mindset helps women see themselves differently. Instead of worrying about being objects for others to look at, they begin to see their bodies as capable and strong. Another participant explained:
Powerlifting changed my life. It made me see myself, or my body. My body wasn’t my value, it was the vehicle that I was in to execute whatever it was that I was executing in life.
This newfound confidence often spills over into other areas of life. As one woman said:
I love being a strong woman. It’s like going against the grain, and it empowers me. When I’m physically strong, everything in the world seems lighter.
Feeling inspired? Here’s how to get started
1. Take things slow
Begin with bodyweight exercises like squats, lunges and push-ups to build a foundation of strength. Once you’re comfortable, add external weights, but keep them light at first. Focus on mastering compound movements, such as deadlifts, squats and overhead presses. These exercises engage multiple joints and muscle groups simultaneously, making your workouts more efficient.
2. Prioritise proper form
Always prioritise proper form over lifting heavier weights. Poor technique can lead to injuries, so learning the correct way to perform each exercise is crucial. To help with this, consider working with an exercise professional who can provide personalised guidance and ensure you’re performing exercises correctly, at least initially.
3. Consistency is key
Like any fitness regimen, consistency is key. Two to three sessions a week are plenty for most women to see benefits. And don’t be afraid to occupy space in the weights room – remember you belong there just as much as anyone else.
4. Find a community
Finally, join a community. There’s nothing like being surrounded by a group of strong women to inspire and motivate you. Engaging with a supportive community can make your strength-training journey more enjoyable and rewarding, whether it’s an in-person class or an online forum.
Are there any downsides?
Gym memberships can be expensive, especially for specialist weightlifting gyms. Home equipment is an option, but quality barbells and weightlifting equipment can come with a hefty price tag.
Also, for women juggling work and family responsibilities, finding time to get to the gym two to three times per week can be challenging.
If you’re concerned about getting too “bulky”, it’s very difficult for women to bulk up like male bodybuilders without pharmaceutical assistance.
The main risks come from poor technique or trying to lift too much too soon – issues that can be easily avoided with some guidance.
Erin Kelly, Lecturer and PhD Candidate, Discipline of Sport and Exercise Science, University of Canberra
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Aspirin, CVD Risk, & Potential Counter-Risks
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Aspirin Pros & Cons
In Tuesday’s newsletter, we asked your health-related opinion of aspirin, and got the above-depicted, below-described set of responses:
- About 42% said “Most people can benefit from low-dose daily use to lower CVD risk”
- About 31% said “It’s safe for occasional use as a mild analgesic, but that’s all”
- About 28% said “We should avoid aspirin; it can cause liver and/or kidney damage”
So, what does the science say?
Most people can benefit from low-dose daily aspirin use to lower the risk of cardiovascular disease: True or False?
True or False depending on what we mean by “benefit from”. You see, it works by inhibiting platelet function, which means it simultaneously:
- decreases the risk of atherothrombosis
- increases the risk of bleeding, especially in the gastrointestinal tract
When it comes to balancing these things and deciding whether the benefit merits the risk, you might be asking yourself: “which am I most likely to die from?” and the answer is: neither
While aspirin is associated with a significant improvement in cardiovascular disease outcomes in total, it is not significantly associated with reductions in cardiovascular disease mortality or all-cause mortality.
In other words: speaking in statistical generalizations of course, it may improve your recovery from minor cardiac events but is unlikely to help against fatal ones
The current prevailing professional (amongst cardiologists) consensus is that it may be recommended for secondary prevention of ASCVD (i.e. if you have a history of CVD), but not for primary prevention (i.e. if you have no history of CVD). Note: this means personal history, not family history.
In the words of the Journal of the American College of Cardiology:
❝Low-dose aspirin (75-100 mg orally daily) might be considered for the primary prevention of ASCVD among select adults 40 to 70 years of age who are at higher ASCVD risk but not at increased bleeding risk (S4.6-1–S4.6-8).
Low-dose aspirin (75-100 mg orally daily) should not be administered on a routine basis for the primary prevention of ASCVD among adults >70 years of age (S4.6-9).
Low-dose aspirin (75-100 mg orally daily) should not be administered for the primary prevention of ASCVD among adults of any age who are at increased risk of bleeding (S4.6-10).❞
~ Dr. Donna Arnett et al. (those section references are where you can find this information in the document)
Read in full: Guideline on the Primary Prevention of Cardiovascular Disease: A Report of the American College of Cardiology
Or if you’d prefer a more pop-science presentation:
Many older adults still use aspirin for CVD prevention, contrary to clinical guidance
Aspirin can cause liver and/or kidney damage: True or False?
True, but that doesn’t mean we must necessarily abstain, so much as exercise caution.
Aspirin is (at recommended doses) not usually hepatotoxic (toxic to the liver), but there is a strong association between aspirin use in children and the development of Reye’s syndrome, a disease involving encephalopathy and a fatty liver. For this reason, most places have an official recommendation that aspirin not be used by children (cut-off age varies from place to place, for example 12 in the US and 16 in the UK, but the key idea is: it’s potentially dangerous for those who are not fully grown).
Aspirin is well-established as nephrotoxic (toxic to the kidneys), however, the toxicity is sufficiently low that this is not expected to be a problem to otherwise healthy adults taking it at no more than the recommended dose.
For numbers, symptoms, and treatment, see this very clear and helpful resource:
An evidence based flowchart to guide the management of acute salicylate (aspirin) overdose
Take care!
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