Mythbusting The Big O
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“Early To Bed…”
In yesterday’s newsletter, we asked you for your (health-related) views on orgasms.
But what does the science say?
Orgasms are essential to good health: True or False?
False, in the most literal sense. One certainly won’t die without them. Anorgasmia (the inability to orgasm) is a condition that affects many postmenopausal women, some younger women, and some men. And importantly, it isn’t fatal—just generally considered unfortunate:
Anorgasmia Might Explain Why You’re Not Orgasming When You Want To
That article focuses on women; here’s a paper focusing on men:
Orgasms are good for the health, but marginally: True or False?
True! They have a wide array of benefits, depending on various factors (including, of course, one’s own sex). That said, the benefits are so marginal that we don’t have a flock of studies to cite, and are reduced to pop-science sources that verbally cite studies that are, alas, nowhere to be found, for example:
- For women: 9 Orgasm Benefits That Might Surprise You
- For men: 9 Ways Orgasms May Benefit Your Health
Doubtlessly the studies do exist, but are sparse enough that finding them is a nightmare as the keywords for them will bring up a lot of studies about orgasms and health that aren’t answering the above question (usually: health’s affect on orgasms, rather than the other way around).
There is some good science for post-menopausal women, though! Here it is:
Misconceptions About Sexual Health in Older Women
(if you have the time to read this, this also covers many very avoidable things that can disrupt sexual function, in ways that people will errantly chalk up to old age, not knowing that they are missing out needlessly)
Orgasms are good or bad, depending on being male or female: True or False
False, broadly. The health benefits are extant and marginal for almost everyone, as indicated above.
What’s that “almost” about, then?
There are a very few* people (usually men) for whom it doesn’t go well. In such cases, they have a chronic and lifelong problem whereby orgasm is followed by 2–7 days of flu-like and allergic symptoms. Little is known about it, but it appears to be some sort of autoimmune disorder.
Read more: Post-orgasmic illness syndrome: history and current perspectives
*It’s hard to say for sure how few though, as it is surely under-reported and thus under-diagnosed; likely even misdiagnosed if the patient doesn’t realize that orgasms are the trigger for such episodes, and the doctor doesn’t think to ask. Instead, they will be busy trying to eliminate foods from the diet, things like that, while missing this cause.
Orgasms are better avoided for optimal health: True or False?
Aside from the above, False. There is a common myth for men of health benefits of “semen retention”, but it is not based in science, just tradition. You can read a little about it here:
The short version is: do it if you want; don’t if you don’t; the body will compensate either way so it won’t make a meaningful difference to anything for most people, healthwise.
Small counterpoint: while withholding orgasm (and ejaculation) is not harmful to health, what does physiologically need draining sometimes is prostate fluid. But that can also be achieved mechanically through prostate milking, or left to fend for itself (as it will in nocturnal emissions, popularly called wet dreams). However, if you have problems with an enlarged prostate, it may not be a bad idea to take matters into your own hands, so to speak. As ever, do check with your doctor if you have (or think you may have) a condition that might affect this.
One final word…
We’re done with mythbusting for today, but we wanted to share this study that we came across (so to speak) while researching, as it’s very interesting:
On which note: if you haven’t already, consider getting a “magic wand” style vibe; you can thank us later (this writer’s opinion: everyone should have one!).
Top tip: do get the kind that plugs into the wall, not rechargeable. The plug-into-the-wall kind are more powerful, and last much longer (both “in the moment”, and in terms of how long the device itself lasts).
Enjoy!
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Benefits of Different Tropical Fruits
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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
❝Would very much like your views of the benefits of different tropical fruits. I do find papaya is excellent for settling the digestion – but keen to know if others have remarkable qualities.❞
Definitely one for a main feature sometime soon! As a bonus while you wait, pineapple has some unique and powerful properties:
❝Its properties include: (1) interference with growth of malignant cells; (2) inhibition of platelet aggregation*; (3) fibrinolytic activity; (4) anti-inflammatory action; (5) skin debridement properties. These biological functions of bromelain, a non-toxic compound, have therapeutic values in modulating: (a) tumor growth; (b) blood coagulation; (c) inflammatory changes; (d) debridement of third degree burns; (e) enhancement of absorption of drugs.❞
*so do be aware of this if you are on blood thinners or otherwise have a bleeding disorder, as you might want to skip the pineapple in those cases!
Source: Bromelain, the enzyme complex of pineapple (Ananas comosus) and its clinical application. An update
Enjoy!
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When Age Is A Flexible Number
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Aging, Counterclockwise!
In the late 1970s, Dr. Ellen Langer hypothesized that physical markers of aging could be affected by psychosomatic means.
Note: psychosomatic does not mean “it’s all in your head”.
Psychosomatic means “your body does what your brain tells it to do, for better or for worse”
She set about testing that, in what has been referred to since as…
The Counterclockwise Study
A small (n=16) sample of men in their late 70s and early 80s were recruited in what they were told was a study about reminiscing.
Back in the 1970s, it was still standard practice in the field of psychology to outright lie to participants (who in those days were called “subjects”), so this slight obfuscation was a much smaller ethical aberration than in some famous studies of the same era and earlier (cough cough Zimbardo cough Milgram cough).
Anyway, the participants were treated to a week in a 1950s-themed retreat, specifically 1959, a date twenty years prior to the experiment’s date in 1979. The environment was decorated and furnished authentically to the date, down to the food and the available magazines and TV/radio shows; period-typical clothing was also provided, and so forth.
- The control group were told to spend the time reminiscing about 1959
- The experimental group were told to pretend (and maintain the pretense, for the duration) that it really was 1959
The results? On many measures of aging, the experimental group participants became quantifiably younger:
❝The experimental group showed greater improvement in joint flexibility, finger length (their arthritis diminished and they were able to straighten their fingers more), and manual dexterity.
On intelligence tests, 63 percent of the experimental group improved their scores, compared with only 44 percent of the control group. There were also improvements in height, weight, gait, and posture.
Finally, we asked people unaware of the study’s purpose to compare photos taken of the participants at the end of the week with those submitted at the beginning of the study. These objective observers judged that all of the experimental participants looked noticeably younger at the end of the study.❞
Remember, this was after one week.
Her famous study was completed in 1979, and/but not published until eleven years later in 1990, with the innocuous title:
Higher stages of human development: Perspectives on adult growth
You can read about it much more accessibly, and in much more detail, in her book:
Counterclockwise: A Proven Way to Think Yourself Younger and Healthier – by Dr. Ellen Langer
We haven’t reviewed that particular book yet, so here’s Linda Graham’s review, that noted:
❝Langer cites other research that has made similar findings.
In one study, for instance, 650 people were surveyed about their attitudes on aging. Twenty years later, those with a positive attitude with regard to aging had lived seven years longer on average than those with a negative attitude to aging.
(By comparison, researchers estimate that we extend our lives by four years if we lower our blood pressure and reduce our cholesterol.)
In another study, participants read a list of negative words about aging; within 15 minutes, they were walking more slowly than they had before.❞
Read the review in full:
Aging in Reverse: A Review of Counterclockwise
The Counterclockwise study has been repeated since, and/but we are still waiting for the latest (exciting, much larger sample, 90 participants this time) study to be published. The research proposal describes the method in great detail, and you can read that with one click over on PubMed:
It was approved, and has now been completed (as of 2020), but the results have not been published yet; you can see the timeline of how that’s progressing over on ClinicalTrials.gov:
Clinical Trials | Ageing as a Mindset: A Counterclockwise Experiment to Rejuvenate Older Adults
Hopefully it’ll take less time than the eleven years it took for the original study, but in the meantime, there seems to be nothing to lose in doing a little “Citizen Science” for ourselves.
Maybe a week in a 20 years-ago themed resort (writer’s note: wow, that would only be 2004; that doesn’t feel right; it should surely be at least the 90s!) isn’t a viable option for you, but we’re willing to bet it’s possible to “microdose” on this method. Given that the original study lasted only a week, even just a themed date-night on a regular recurring basis seems like a great option to explore (if you’re not partnered then well, indulge yourself how best you see fit, in accord with the same premise; a date-night can be with yourself too!).
Just remember the most important take-away though:
Don’t accidentally put yourself in your own control group!
In other words, it’s critically important that for the duration of the exercise, you act and even think as though it is the appropriate date.
If you instead spend your time thinking “wow, I miss the [decade that does it for you]”, you will dodge the benefits, and potentially even make yourself feel (and thus, potentially, if the inverse hypothesis holds true, become) older.
This latter is not just our hypothesis by the way, there is an established potential for nocebo effect.
For example, the following study looked at how instructions given in clinical tests can be worded in a way that make people feel differently about their age, and impact the results of the mental and/or physical tests then administered:
❝Our results seem to suggest how manipulations by instructions appeared to be more largely used and capable of producing more clear performance variations on cognitive, memory, and physical tasks.
Age-related stereotypes showed potentially stronger effects when they are negative, implicit, and temporally closer to the test of performance. ❞
(and yes, that’s the same Dr. Francesco Pagnini whose name you saw atop the other study we cited above, with the 90 participants recreating the Counterclockwise study)
Want to know more about [the hard science of] psychosomatic health?
Check out Dr. Langer’s other book, which we reviewed recently:
The Mindful Body: Thinking Our Way to Chronic Health – by Dr. Ellen Langer
Enjoy!
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L-Theanine: What’s The Tea?
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L-Theanine: What’s The Tea?
We’ve touched previously on l-theanine, when this newsletter was new, and we had only a few hundred subscribers and the carefully organized format wasn’t yet what it is today.
So now it’s time to give this potent dietary compound / nutritional supplement the “Monday Research Review” treatment…
What is it?
L-theanine is an amino acid found in tea. The human body can’t produce it, and/but it’s not essential for humans. It does have a lot of benefits, though. See for example:
L-Theanine as a Functional Food Additive: Its Role in Disease Prevention and Health Promotion
How does it work?
L-theanine works by moderating and modulating the brain’s neurotransmitters.
This sounds fancy, but basically it means: it doesn’t actually add anything in the manner of a drug, but it changes how we use what we have naturally.
What does it do? Read on…
It increases mental focus
It has been believed that l-theanine requires the presence of caffeine to achieve this (i.e., it’s a combination-only effect). For example:
But as it turns out, when a group of researchers actually checked… This isn’t true, as Foxe et al. write:
❝We asked whether either compound alone, or both in combination, would affect performance of the task in terms of reduced error rates over time, and whether changes in alpha-band activity would show a relationship to such changes in performance. When treated with placebo, participants showed a rise in error rates, a pattern that is commonly observed with increasing time-on-task, whereas after caffeine and theanine ingestion, error rates were significantly reduced. The combined treatment did not confer any additional benefits over either compound alone, suggesting that the individual compounds may confer maximal benefits at the dosages employed❞
It promotes a calmly wakeful feeling of serenity
Those are not words typically found in biopharmaceutical literature, but they’re useful here to convey:
- L-theanine promotes relaxation without causing drowsiness
- L-theanine promotes mental alertness without being a stimulant
Here is where l-theanine really stands out from caffeine. If both substances promote mental focus, but one of them does it by making us “wired” and the other does it while simultaneously promoting calm, it makes the choice between them clearer!
Read more: L-theanine, a natural constituent in tea, and its effect on mental state
It relieves stress and anxiety
Building on from the above, but there’s more: l-theanine relieves stress and anxiety in people experiencing stressful situations, without any known harmful side effects… This is something that sets it apart from a lot of anxiolytic (antianxiety) drugs!
Here’s what a big systematic review of clinical trials had to say:
Theanine consumption, stress and anxiety in human clinical trials: A systematic review
L-theanine has other benefits too
We’ve talked about some of the most popular benefits of l-theanine, and we can’t make this newsletter too long, but research also suggests that it…
- Supports healthy weight management
- Reduces inflammation
- Supports immune health
- Helps fight cancer
- May extend lifespan ← this one’s a C. elegans study, but despite being a tiny worm, they actually function very similarly to humans on a cellular level; it’s why they’re used so much for anti-aging research
If you’re interested in this topic, we recommend also reading our previous article on l-theanine—pardon that we hadn’t really nailed down our style yet—but there’s a bunch of useful information about how l-theanine makes caffeine “better” in terms of benefits. We also talk dosage, and reference some other studies we didn’t have room to include today!
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Stolen Focus – by Johann Hari
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Having trouble concentrating for long periods? It’s not just a matter of getting older…
Johann Hari outlines twelve key ways in which our attention has not merely “wandered”, so much as it has been outright stolen.
By whom? For what purpose? Obvious culprits include social media and outrage-stoking news outlets, but the problem, as Hari illustrates, goes much deeper than that.
He talks about how we cannot truly multi-task, and can only switch beween tasks, at a cost. And yet, the modern world is not at all friendly to single-tasking!
Writer’s note: as I write this, I have active two screens, containing four windows, one of which has three tabs open. I am not multitasking; all those things pertain to the work I am doing right now. If I closed them between use, it’d only cost me more time and attention opening and closing them all the time. And yet, my working conditions are considered practically “hyperfocused” in this century!
- We learn about how the working world has changed, and the rise of physical and mental exhaustion that has come with it.
- We learn about the collapse of sustained reading, that started well before the modern Internet.
- We learn about factors such as dietary shifts that sap our energy too.
…and more. Twelve key things, remember.
But, it’s not all doom and gloom. There are things we can do to fight back. Some are personal changes; others are societal changes to push for.
The last part of the book is given over to, essentially, a manifesto (and how-to guide) for reclaiming our attention and thinking deeply again.
Bottom line: if you struggle with maintaining attention; this is a book for you. You might want to put your phone in a drawer while you read it, though
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Saunas: Health Benefits (& Caveats)
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The Heat Is On
In Tuesday’s newsletter, we asked you your (health-related) opinion on saunas, and got the above-depicted, below-described, set of responses:
- About 53% said it is “a healthful activity with many benefits”
- About 25% said it is “best avoided; I feel like I’m dying in there”
- About 12% said “it feels good and therefore can’t be all bad”
So what does the science say?
The heat of saunas carries a health risk: True or False?
False, generally speaking, for any practical purposes. Of course, anything in life comes with a health risk, but statistically speaking, your shower at home is a lot more dangerous than a sauna (risk of slipping with no help at hand).
It took a bit of effort to find a paper on the health risks of saunas, because all the papers on PubMed etc coming up for those keywords were initially papers with “reduces the risk of…”, i.e. ways in which the sauna is healthy.
However, we did find one:
❝Contraindications to sauna bathing include unstable angina pectoris, recent myocardial infarction, and severe aortic stenosis.
Sauna bathing is safe, however, for most people with coronary heart disease with stable angina pectoris or old myocardial infarction.
Very few acute myocardial infarctions and sudden deaths occur in saunas, but alcohol consumption during sauna bathing increases the risk of hypotension, arrhythmia, and sudden death, and should be avoided. ❞
~ Dr. Matti Hannuksela & Dr. Samer Ellahham
Source: Benefits and risks of sauna bathing
So, very safe for most people, safe even for most people with heart disease, but there are exceptions so check with your own doctor of course.
And drinking alcohol anywhere is bad for the health, but in a sauna it’s a truly terrible idea. As an aside, please don’t drink alcohol in the shower, either (risk of slipping with no help at hand, and this time, broken glass too).
On the topic of it being safe for most people’s hearts, see also:
Beneficial effects of sauna bathing for heart failure patients
As an additional note, those who have a particular sensitivity to the heat, may (again please check with your own doctor, as your case may vary) actually benefit from moderate sauna use, to reduce the cardiovascular strain that your body experiences during heatwaves (remember, you can get out of a sauna more easily than you can get out of a heatwave, so for many people it’s a lot easier to do moderation and improve thermoregulatory responses):
Sauna usage can bring many health benefits: True or False?
True! Again, at least for most people. As well as the above-discussed items, here’s one for mortality rates in healthy Finnish men:
Not only that, also…
❝The Finnish saunas have the most consistent and robust evidence regarding health benefits and they have been shown to decrease the risk of health outcomes such as hypertension, cardiovascular disease, thromboembolism, dementia, and respiratory conditions; may improve the severity of musculoskeletal disorders, COVID-19, headache and flu, while also improving mental well-being, sleep, and longevity.
Finnish saunas may also augment the beneficial effects of other protective lifestyle factors such as physical activity.
The beneficial effects of passive heat therapies may be linked to their anti-inflammatory, cytoprotective and anti-oxidant properties and synergistic effects on neuroendocrine, circulatory, cardiovascular and immune function.
Passive heat therapies, notably Finnish saunas, are emerging as potentially powerful and holistic strategies to promoting health and extending the healthspan in all populations. ❞
~ Dr. Jari Laukkanen & Dr. Setor Kunutsor
(the repeated clarification of “Finnish sauna” is not a matter of fervent nationalism, by the way, but rather a matter of disambiguating it from Swedish sauna, which has some differences, most notably a lack of steam)
That reminds us: in Scandinavia, it is usual to use a sauna naked, and in Finland in particular, it is a common social activity amongst friends, coworkers, etc. In the US, many people are not so comfortable with nudity, and indeed, many places that provide saunas, may require the wearing of swimwear. But…
Just one problem: if you’re wearing swimwear because you’ve just been swimming in a pool, you now have chlorinated water soaked into your swimwear, which in the sauna, will become steam + chlorine gas. That’s not so good for your health (and is one reason, beyond tradition and simple normalization, for why swimwear is usually not permitted in Finnish saunas).
Want to read more?
You might like our previous main feature,
Turning Up The Heat Against Diabetes & Alzheimer’s ← you guessed it, sauna may be beneficial against these too
Take care!
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Is cold water bad for you? The facts behind 5 water myths
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We know the importance of staying hydrated, especially in hot weather. But even for something as simple as a drink of water, conflicting advice and urban myths abound.
Is cold water really bad for your health? What about hot water from the tap? And what is “raw water”? Let’s dive in and find out.
Myth 1: Cold water is bad for you
Some recent TikToks have suggested cold water causes health problems by somehow “contracting blood vessels” and “restricting digestion”. There is little evidence for this.
While a 2001 study found 51 out of 669 women tested (7.6%) got a headache after drinking cold water, most of them already suffered from migraines and the work hasn’t been repeated since.
Cold drinks were shown to cause discomfort in people with achalasia (a rare swallowing disorder) in 2012 but the study only had 12 participants.
For most people, the temperature you drink your water is down to personal preference and circumstances. Cold water after exercise in summer or hot water to relax in winter won’t make any difference to your overall health.
Myth 2: You shouldn’t drink hot tap water
This belief has a grain of scientific truth behind it. Hot water is generally a better solvent than cold water, so may dissolve metals and minerals from pipes better. Hot water is also often stored in tanks and may be heated and cooled many times. Bacteria and other disease-causing microorganisms tend to grow better in warm water and can build up over time.
It’s better to fill your cup from the cold tap and get hot water for drinks from the kettle.
Myth 3: Bottled water is better
While bottled water might be safer in certain parts of the world due to pollution of source water, there is no real advantage to drinking bottled water in Australia and similar countries.
According to University of Queensland researchers, bottled water is not safer than tap water. It may even be tap water. Most people can’t tell the difference either. Bottled water usually costs (substantially) more than turning on the tap and is worse for the environment.
What about lead in tap water? This problem hit the headlines after a public health emergency in Flint, Michigan, in the United States. But Flint used lead pipes with a corrosion inhibitor (in this case orthophosphate) to keep lead from dissolving. Then the city switched water sources to one without a corrosion inhibitor. Lead levels rose and a public emergency was declared.
Fortunately, lead pipes haven’t been used in Australia since the 1930s. While lead might be present in some old plumbing products, it is unlikely to cause problems.
Myth 4: Raw water is naturally healthier
Some people bypass bottled and tap water, going straight to the source.
The “raw water” trend emerged a few years ago, encouraging people to drink from rivers, streams and lakes. There is even a website to help you find a local source.
Supporters say our ancestors drank spring water, so we should, too. However, our ancestors also often died from dysentery and cholera and their life expectancy was low.
While it is true even highly treated drinking water can contain low levels of things like microplastics, unless you live somewhere very remote, the risks of drinking untreated water are far higher as it is more likely to contain pollutants from the surrounding area.
Myth 5: It’s OK to drink directly from hoses
Tempting as it may be, it’s probably best not to drink from the hose when watering the plants. Water might have sat in there, in the warm sun for weeks or more potentially leading to bacterial buildup.
Similarly, while drinking water fountains are generally perfectly safe to use, they can contain a variety of bacteria. It’s useful (though not essential) to run them for a few seconds before you start to drink so as to get fresh water through the system rather than what might have been sat there for a while.
We are fortunate to be able to take safe drinking water for granted. Billions of people around the world are not so lucky.
So whether you like it hot or cold, or somewhere in between, feel free to enjoy a glass of water this summer.
Just don’t drink it from the hose.
Oliver A.H. Jones, Professor of chemistry, RMIT University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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