The No-Nonsense Meditation Book – by Dr. Steven Laureys
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We’ve reviewed books about meditation before, and when we review books, we try to pick ones that have something that make them stand out from the others. So, what stands out in this case?
The author is a medical doctor and neurologist, with decades of experience focusing on neuronal plasticity and multimodel neural imaging. So, a little beyond “think happy thoughts”-style woo.
The style of the book is pop-science in tone, but with a lot of hard clinical science underpinning it and referenced throughout, as one would expect of a scientist of Dr. Laurey’s stature (with hundreds of peer-reviewed papers in top-level journals).
You may be wondering: is this a “how-to” book or a “why-to” book or a “what-happens” book? It’s all three.
The “how-to” is also, as the title suggests, no-nonsense. We are talking maximum results for minimum mystery here.
Bottom line: if you’d like to be able to take up a meditative practice and know exactly what it’s doing to your brain (quietening these parts, stimulating and physically growing those parts, etc) then this is the book for you.
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Mythbusting The Mask Debate
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Mythbusting The Mask Debate
We asked you for your mask policy this respiratory virus season, and got the above-depicted, below-described, set of responses:
- A little under half of you said you will be masking when practical in indoor public places
- A little over a fifth of you said you will mask only if you have respiratory virus symptoms
- A little under a fifth of you said that you will not mask, because you don’t think it helps
- A much smaller minority of you (7%) said you will go with whatever people around you are doing
- An equally small minority of you said that you will not mask, because you’re not concerned about infections
So, what does the science say?
Wearing a mask reduces the transmission of respiratory viruses: True or False?
True…with limitations. The limitations include:
- The type of mask
- A homemade polyester single-sheet is not the same as an N95 respirator, for instance
- How well it is fitted
- It needs to be a physical barrier, so a loose-fitting “going through the motions” fit won’t help
- The condition of the mask
- And if applicable, the replaceable filter in the mask
- What exactly it has to stop
- What kind of virus, what kind of viral load, what kind of environment, is someone coughing/sneezing, etc
More details on these things can be found in the link at the end of today’s main feature, as it’s more than we could fit here!
Note: We’re talking about respiratory viruses in general in this main feature, but most extant up-to-date research is on COVID, so that’s going to appear quite a lot. Remember though, even COVID is not one beast, but many different variants, each with their own properties.
Nevertheless, the scientific consensus is “it does help, but is not a magical amulet”:
- 2021: Effectiveness of Face Masks in Reducing the Spread of COVID-19: A Model-Based Analysis
- 2022: Why Masks are Important during COVID‐19 Pandemic
- 2023: The mitigating effect of masks on the spread of COVID-19
Wearing a mask is actually unhygienic: True or False?
False, assuming your mask is clean when you put it on.
This (the fear of breathing more of one’s own germs in a cyclic fashion) was a point raised by some of those who expressed mask-unfavorable views in response to our poll.
There have been studies testing this, and they mostly say the same thing, “if it’s clean when you put it on, great, if not, then well yes, that can be a problem”:
❝A longer mask usage significantly increased the fungal colony numbers but not the bacterial colony numbers.
Although most identified microbes were non-pathogenic in humans; Staphylococcus epidermidis, Staphylococcus aureus, and Cladosporium, we found several pathogenic microbes; Bacillus cereus, Staphylococcus saprophyticus, Aspergillus, and Microsporum.
We also found no associations of mask-attached microbes with the transportation methods or gargling.
We propose that immunocompromised people should avoid repeated use of masks to prevent microbial infection.❞
Source: Bacterial and fungal isolation from face masks under the COVID-19 pandemic
Wearing a mask can mean we don’t get enough oxygen: True or False?
False, for any masks made-for-purpose (i.e., are by default “breathable”), under normal conditions:
- COVID‐19 pandemic: do surgical masks impact respiratory nasal functions?
- Performance Comparison of Single and Double Masks: Filtration Efficiencies, Breathing Resistance and CO2 Content
However, wearing a mask while engaging in strenuous best-effort cardiovascular exercise, will reduce VO₂max. To be clear, you will still have more than enough oxygen to function; it’s not considered a health hazard. However, it will reduce peak athletic performance:
…so if you are worrying about whether the mask will impede you breathing, ask yourself: am I engaging in an activity that requires my peak athletic performance?
Also: don’t let it get soaked with water, because…
Writer’s anecdote as an additional caveat: in the earliest days of the COVID pandemic, I had a simple cloth mask on, the one-piece polyester kind that we later learned quite useless. The fit wasn’t perfect either, but one day I was caught in heavy rain (I had left it on while going from one store to another while shopping), and suddenly, it fitted perfectly, as being soaked through caused it to cling beautifully to my face.
However, I was now effectively being waterboarded. I will say, it was not pleasant, but also I did not die. I did buy a new mask in the next store, though.
tl;dr = an exception to “no it won’t impede your breathing” is that a mask may indeed impede your breathing if it is made of cloth and literally soaked with water; that is how waterboarding works!
Want up-to-date information?
Most of the studies we cited today were from 2022 or 2023, but you can get up-to-date information and guidance from the World Health Organization, who really do not have any agenda besides actual world health, here:
Coronavirus disease (COVID-19): Masks | Frequently Asked Questions
At the time of writing this newsletter, the above information was last updated yesterday.
Take care!
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Coconut & Lemongrass Protein Soup
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The main protein here is pea protein, but the soup’s health benefits don’t stop there. With healthy MCTs from the coconut, as well as phytochemical benefits from the ginger and chili, this wonderfully refreshing soup has a lot to offer.
You will need
- 1 can coconut milk
- 1 cup vegetable stock (making your own, or buying a low-sodium option)
- 1 cup frozen petits pois
- 1 oz fresh ginger, roughly chopped
- ½ oz lemongrass stalk, crumpled without being broken into multiple pieces
- 1 red chili, roughly chopped
- 1 tbsp white miso paste
- zest and juice of 1 lime
- Optional: garnish of your choice
Method
(we suggest you read everything at least once before doing anything)
1) Mix the coconut milk, vegetable stock, ginger, and chili in a saucepan, and simmer for 15 minutes
2) Remove the lemongrass and ginger (and the chili if you don’t want more heat), and add the petit pois. Bring back to a simmer for about 2 minutes more, stir in the miso paste and lime, then take off the heat.
3) Blend the soup to a smooth purée. Since it is hot, you will need to either use a stick blender, or else a food processor that is ok with blending hot liquids (many are not, so don’t use yours unless you’re sure, as it might explode if it’s not made for that). Alternatively, you can let it cool, blend it, and then reheat it.
4) Serve, adding a garnish if you so wish:
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Can Saturated Fats Be Healthy?
- Ginger Does A Lot More Than You Think
- Capsaicin For Weight Loss And Against Inflammation
Take care!
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Melatonin: A Safe, Natural Sleep Aid?
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Melatonin: A safe sleep supplement?
Melatonin is a hormone normally made in our pineal gland. It helps regulate our circadian rhythm, by making us sleepy.
It has other roles too—it has a part to play in regulating immune function, something that also waxes and wanes as a typical day goes by.
Additionally, since melatonin and cortisol are antagonistic to each other, a sudden increase in either will decrease the other. Our brain takes advantage of this, by giving us a cortisol spike in the morning to help us wake up.
As a supplement, it’s generally enjoyed with the intention of inducing healthy, natural, restorative sleep.
Does it really induce healthy, natural, restorative, sleep?
Yes! Well, “natural” is a little subject and relative, if you’re taking it as a supplement, but it’s something your body produces naturally anyway.
Contrast with, for example, benzodiazepines (that whole family of medications with names ending in -azopan or -alozam), or other tranquilizing drugs that do not so much induce healthy sleep, but rather reduce your brain function and hopefully knock you out, and/but often have unwanted side effects, and a tendency to create dependency.
Melatonin, unlike most of those drugs, does not create dependency, and furthermore, we don’t develop tolerance to it. In other words, the same dose will continue working (we won’t need more and more).
In terms of benefits, melatonin not only reduces the time to fall asleep and increases total sleep time, but also (quite a bonus) improves sleep quality, too:
Meta-Analysis: Melatonin for the Treatment of Primary Sleep Disorders
Because it is a natural hormone rather than a drug with many side effects and interactions, it’s also beneficial for those who need good sleep and/but don’t want tranquilizing:
Any other benefits?
Yes! It can also help guard against Seasonal Affective Disorder, also called seasonal depression. Because SAD is not just about “not enough light = not enough serotonin”, but also partly about circadian rhythm and (the body is not so sure what time of day it is when there are long hours of darkness, or even, in the other hemisphere / other time of year, long hours of daylight), melatonin can help, by giving your brain something to “anchor” onto, provided you take it at the same time each day. See:
- Is seasonal affective disorder a disorder of circadian rhythms?
- The circadian basis of winter depression: the case for low-dose melatonin use
As a small bonus, melatonin also promotes HGH production (important for maintaining bone and muscle mass, especially in later life):
Anything we should worry about?
Assuming taking a recommended dose only (0.5mg–10mg per day), toxicity is highly unlikely, especially given that it has a half-life of only 40–60 minutes, so it’ll be eliminated quite quickly.
However! It does indeed induce sleepiness, so for example, don’t take melatonin and then try to drive or operate heavy machinery—or, ideally, do anything other than go to bed.
It can interfere with some medications. We mentioned that melatonin helps regulate immune function, so for example that’s something to bear in mind if you’re on immunosuppressants or otherwise have an autoimmune disorder. It can also interfere with blood pressure medications and blood thinners, and may make epilepsy meds less effective.
As ever, if in doubt, please speak with your doctor and/or pharmacist.
Where to get it?
As ever, we don’t sell it (or anything else), but for your convenience, here is an example product on Amazon.
Enjoy!
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Ideal Blood Pressure Numbers Explained
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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
❝Maybe I missed it but the study on blood pressure did it say what the 2 numbers should read ideally?❞
We linked it at the top of the article rather than including it inline, as we were short on space (and there was a chart rather than a “these two numbers” quick answer), but we have a little more space today, so:
Category Systolic (mm Hg) Diastolic (mm Hg) Normal < 120 AND < 80 Elevated 120 – 129 AND < 80 Stage 1 – High Blood Pressure 130 – 139 OR 80 – 89 Stage 2 – High Blood Pressure 140 or higher OR 90 or higher Hypertensive Crisis Above 180 AND/OR Above 120 To oversimplify for a “these two numbers” answer, under 120/80 is generally considered good, unless it is under 90/60, in which case that becomes hypotension.
Hypotension, the blood pressure being too low, means your organs may not get enough oxygen and if they don’t, they will start shutting down.
To give you an idea how serious this, this is the closed-circuit equivalent of the hypovolemic shock that occurs when someone is bleeding out onto the floor. Technically, bleeding to death also results in low blood pressure, of course, hence the similarity.
So: just a little under 120/80 is great.
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Sunflower Seeds vs Sesame Seeds – Which is Healthier?
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Our Verdict
When comparing sunflower seeds to sesame seeds, we picked the sunflower.
Why?
In moderation, both are very healthy. We say “in moderation” because they’re both about 50% fat and such fats, while vital for life, are generally best enjoyed in small portions. Of that fat, sunflower has the slightly better fat profile; they’re both mostly poly- and monounsaturated fats, but sunflower has 10% saturated fat while sesame has 15%. Aside from fats, sunflower has slightly more protein and sesame has slightly more carbs. While sesame has slightly more fiber, because of the carb profile sunflower still has the lower glycemic index. All in all, a moderate win for sunflower in the macros category.
You may be wondering, with all that discussion of fats, what they’re like for omega-3, and sesame seeds have more omega-3, though sunflower seeds contain it too. Still, a point in sesame’s favor here.
When it comes to vitamins, sunflower has more of vitamins A, B1, B2, B3, B5, B6, B9, C, E, and choline, while sesame is not higher in any vitamins.
In the category of minerals, sunflower has more phosphorus, potassium, and selenium, while sesame has more calcium, copper, iron, and zinc. This is nominally a marginal win for sesame, but it should be noted that sunflower is still very rich in copper, iron, and zinc too (but not calcium).
Adding up the categories makes for a moderate win for sunflower seeds, but as ever, enjoy both; diversity is best!
Want to learn more?
You might like to read:
Sunflower Seeds vs Pumpkin Seeds – Which is Healthier?
Take care!
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HRT Side Effects & Troubleshooting
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This is Dr. Heather Hirsch. She’s a board-certified internist, and her clinical expertise focuses on women’s health, particularly in midlife and menopause, and its intersection with chronic diseases (ranging from things associated with sexual health, to things like osteoporosis and heart disease).
So, what does she want us to know?
HRT can be life-changingly positive, but it can be a shaky start
Hormone Replacement Therapy (HRT), and in this context she’s talking specifically about the most common kind, Menopausal Hormone Therapy (MHT), involves taking hormones that our body isn’t producing enough of.
If these are “bioidentical hormones” as used in most of the industrialized world and increasingly also in N. America, then this is by definition a supplement rather than a drug, for what it’s worth, whereas some non-bioidentical hormones (or hormone analogs, which by definition function similarly to hormones but aren’t the same thing) can function more like drugs.
We wrote a little about his previously:
Hormone Replacement Therapy: A Tale Of Two Approaches
For most people most of the time, bioidentical hormones are very much the best way to go, as they are not only more effective, but also have fewer side effects.
That said, even bioidentical hormones can have some undesired effects, so, how to deal with those?
Don’t worry; bleed happy
A reprise of (usually quite light) menstrual bleeding is the most common side effect of menopausal HRT.
This happens because estrogen affects* the uterus, leading to a build-up and shedding of the uterine lining.
*if you do not have a uterus, estrogen can effect uterine tissue. That’s not a typo—here we mean the verb “effect”, as in “cause to be”. It will not grow a new uterus, but it can cause some clumps of uterine tissue to appear; this means that it becomes possible to get endometriosis without having a uterus. This information should not be too shocking, as endometriosis is a matter of uterine tissue growing inconveniently, often in places where it shouldn’t, and sometimes quite far from the uterus (if present, or its usual location, if absent). However, the risk of this happening is far lower than if you actually have a uterus:
What you need to know about endometriosis
Back to “you have a uterus and it’s making you wish you didn’t”:
This bleeding should, however, be light. It’ll probably be oriented around a 28-day cycle even if you are taking your hormones at the same dose every day of the month, and the bleeding will probably taper off after about 6 months of this.
If the bleeding is heavier, all the time, or persists longer than 6 months, then speak to your gynecologist about it. Any of those three; it doesn’t have to be all three!
Bleeding outside of one’s normal cycle can be caused by anything from fibroids to cancer; statistically speaking it’s probably nothing too dire,but when your safety is in question, don’t bet on “probably”, and do get it checked out:
When A Period Is Very Late (i.e., Post-Menopause)
Dr. Hirsch recommends, as possible remedies to try (preferably under your gynecologist’s supervision):
- lowering your estrogen dose
- increasing your progesterone dose
- taking progesterone continuously instead of cyclically
And if you’re not taking progesterone, here’s why you might want to consider taking this important hormone that works with estrogen to do good things, and against estrogen to rein in some of estrogen’s less convenient things:
Progesterone Menopausal HRT: When, Why, And How To Benefit
(the above link contains, as well as textual information, an explanatory video from Dr. Hirsch herself)
Get the best of the breast
Calm your tits. Soothe your boobs. Destress your breasts. Hakuna your tatas. Undo the calamity beleaguering your mammaries.
Ok, more seriously…
Breast tenderness is another very common symptom when starting to take estrogen. It can worry a lot of people (à la “aagh, what is this and is it cancer!?”), but is usually nothing to worry about. But just to be sure, do also check out:
Keeping Abreast Of Your Cancer Risk: How To Triple Your Breast Cancer Survival Chances
Estrogen can cause feelings of breast fullness, soreness, nipple irritation, and sometimes lactation, but this later will be minimal—we’re talking a drop or two now and again, not anything that would feed a baby.
Basically, it happens when your body hasn’t been so accustomed to normal estrogen levels in a while, and suddenly wakes up with a jolt, saying to itself “Wait what are we doing puberty again now? I thought we did menopause? Are we pregnant? What’s going on? Ok, checking all systems!” and then may calm down not too long afterwards when it notes that everything is more or less as it should be already.
If this persists or is more than a minor inconvenience though, Dr. Hirsch recommends looking at the likely remedies of:
- Adjust estrogen (usually the cause)
- Adjust progesterone (less common)
- If it’s progesterone, changing the route of administration can ameliorate things
What if it’s not working? Is it just me?
Dr. Hirsch advises the most common reasons are simply:
- wrong formulation (e.g. animal-derived estrogen or hormone analog, instead of bioidentical)
- wrong dose (e.g. too low)
- wrong route of administration (e.g. oral vs transdermal; usually transdermal estradiol is most effective but many people do fine on oral; progesterone meanwhile is usually best as a pessary/suppository, but many people do fine on oral)
Writer’s example: in 2022 there was an estrogen shortage in my country, and while I had been on transdermal estradiol hemihydrate gel, I had to go onto oral estradiol valerate tablets for a few months, because that’s what was available. And the tablets simply did not work for me at all. I felt terrible and I have a good enough intuitive sense of my hormones to know when “something wrong is not right”, and a good enough knowledge of the pharmacology & physiology to know what’s probably happening (or not happening). And sure enough, when I got my blood test results, it was as though I’d been taking nothing. It was such a relief to get back on the gel once it became available again!
So, if something doesn’t seem to be working for you, speak up and get it fixed if at all possible.
See also: What You Should Have Been Told About Menopause Beforehand
Want to know more from Dr. Hirsch?
You might like this book of hers, which we haven’t reviewed yet, but present here for your interest:
Enjoy!
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