Cordyceps: Friend Or Foe?
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Cordyceps: friend or foe?
Cordyceps is a famously frightening fungus. It’s the one responsible for “zombie ants” and other zombie creatures, and it’s the basis for the existential threat to humanity in the TV show The Last of Us.
It’s a parasitic fungus that controls the central and peripheral nervous systems of its host, slowly replacing the host’s body, as well as growing distinctive spines that erupt out of the host’s body. Taking over motor functions, it compels the host to do two main things, which are to eat more food, and climb to a position that will be good to release spores from.
Fortunately, none of that matters to humans. Cordyceps does not (unlike in the TV show) affect humans that way.
What does Cordyceps do in humans?
Cordyceps (in various strains) is enjoyed as a health supplement, based on a long history of use in Traditional Chinese Medicine, and nowadays it’s coming under a scientific spotlight too.
The main health claims for it are:
- Against inflammation
- Against aging
- Against cancer
- For blood sugar management
- For heart health
- For exercise performance
Sounds great! What does the science say?
There’s a lot more science for the first three (which are all closely related to each other, and often overlapping in mechanism and effect).
So let’s take a look:
Against inflammation
The science looks promising for this, but studies so far have either been in vitro (cell cultures in petri dishes), or else murine in vivo (mouse studies), for example:
- Anti-inflammatory effects of Cordyceps mycelium in murine macrophages
- Cordyceps sinensis as an immunomodulatory agent
- Immunomodulatory functions of extracts from Cordyceps cicadae
- Cordyceps pruinosa inhibits in vitro and in vivo inflammatory mediators
In summary: we can see that it has anti-inflammatory properties for mice and in the lab; we’d love to see the results of studies done on humans, though. Also, while it has anti-inflammatory properties, it performed less well than commonly-prescribed anti-inflammatory drugs, for example:
❝C. militaris can modulate airway inflammation in asthma, but it is less effective than prednisolone or montelukast.❞
Against aging
Because examining the anti-aging effects of a substance requires measuring lifespans and repeating the experiment, anti-aging studies do not tend to be done on humans, because they would take lifetimes to perform. To this end, it’s inconvenient, but not a criticism of Cordyceps, that studies have been either mouse studies (short lifespan, mammals like us) or fruit fly studies (very short lifespan, genetically surprisingly similar to us).
The studies have had positive results, with typical lifespan extensions of 15–20%:
- The lifespan-extending effect of Cordyceps sinensis in normal mice
- Cordyceps sinensis oral liquid prolongs the lifespan of the fruit fly, Drosophila melanogaster
- Anti-aging activity of polysaccharides from Cordyceps militaris
- Anti-aging effect of Cordyceps sinensis extract
Against cancer
Once again, the studies here have been in vitro, or murine in vivo. They do look good though:
In vitro (human cell cultures in a lab):
In vivo (mouse studies):
Summary of these is: Cordyceps quite reliably inhibits tumor growth in vitro (human cell cultures) and in vivo (mouse studies). However, trials in human cancer patients are so far conspicuous by their absence.
For blood sugar management
Cordyceps appears to mimic the action of insulin, without triggering insulin sensitivity. For example:
The anti-hyperglycemic activity of the fruiting body of Cordyceps in diabetic rats
There were some other rat/mouse studies with similar results. No studies in humans yet.
For heart health
Cordyceps contains adenosine. You may remember that caffeine owes part of its stimulant effect to blocking adenosine, the hormone that makes us feel sleepy. So in this way, Cordyceps partially does the opposite of what caffeine does, and may be useful against arrhythmia:
Cardiovascular protection of Cordyceps sinensis act partially via adenosine receptors
For exercise performance
A small (30 elderly participants) study found that Cordyceps supplementation improved VO2 max by 7% over the course of six weeks:
However, another small study (22 young athletes) failed to reproduce those results:
Cordyceps Sinensis supplementation does not improve endurance exercise performance
In summary…
Cordyceps almost certainly has anti-inflammation, anti-aging, and anti-cancer benefits.
Cordyceps may have other benefits too, but the evidence is thinner on the ground for those, so far.
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What does it mean to be immunocompromised?
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Our immune systems help us fight off disease, but certain health conditions and medications can weaken our immune systems. People whose immune systems don’t work as well as they should are considered immunocompromised.
Read on to learn more about how the immune system works, what causes people to be immunocompromised, and how we can protect ourselves and the immunocompromised people around us from illness.
What is the immune system?
The immune system is a network of cells, organs, and chemicals that helps our bodies fight off infections caused by invaders, such as bacteria, viruses, fungi, and parasites.
Some important parts of the immune system include:
- White blood cells, which attack and kill germs that don’t belong inside our bodies.
- Lymph nodes, which help our bodies filter out germs.
- Antibodies, which help our bodies recognize invaders.
- Cytokines, which tell our immune cells what to do.
What causes people to be immunocompromised?
Some health conditions and medications can prevent our immune systems from functioning optimally, which makes us more vulnerable to infection. Health conditions that compromise the immune system fall into two categories: primary immunodeficiency and secondary immunodeficiency.
Primary immunodeficiency
People with primary immunodeficiency are born with genetic mutations that prevent their immune systems from functioning as they should. There are hundreds of types of primary immunodeficiencies. Since these mutations affect the immune system to varying degrees, some people may experience symptoms and get diagnosed early in life, while others may not know they’re immunocompromised until adulthood.
Secondary immunodeficiency
Secondary immunodeficiency happens later in life due to an infection like HIV, which weakens the immune system over time, or certain types of cancer, which prevent the body from producing enough white blood cells to adequately fight off infection. Studies have also shown that getting infected with COVID-19 may cause immunodeficiency by reducing our production of “killer T-cells,” which help fight off infections.
Sometimes necessary treatments for certain medical conditions can also cause secondary immunodeficiency. For example, people with autoimmune disorders—which cause the immune system to become overactive and attack healthy cells—may need to take immunosuppressant drugs to manage their symptoms. However, the drugs can make them more vulnerable to infection.
People who receive organ transplants may also need to take immunosuppressant medications for life to prevent their body from rejecting the new organ. (Given the risk of infection, scientists continue to research alternative ways for the immune system to tolerate transplantation.)
Chemotherapy for cancer patients can also cause secondary immunodeficiency because it kills the immune system’s white blood cells as it’s trying to kill cancer cells.
What are the symptoms of a compromised immune system?
People who are immunocompromised may become sick more frequently than others or may experience more severe or longer-term symptoms than others who contract the same disease.
Other symptoms of a compromised immune system may include fatigue; digestive problems like cramping, nausea, and diarrhea; and slow wound healing.
How can I find out if I’m immunocompromised?
If you think you may be immunocompromised, talk to your health care provider about your medical history, your symptoms, and any medications you take. Blood tests can determine whether your immune system is producing adequate proteins and cells to fight off infection.
I’m immunocompromised—how can I protect myself from infection?
If you’re immunocompromised, take precautions to protect yourself from illness.
Wash your hands regularly, wear a well-fitting mask around others to protect against respiratory viruses, and ensure that you’re up to date on recommended vaccines.
Immunocompromised people may need more doses of vaccines than people who are not immunocompromised—including COVID-19 vaccines. Talk to your health care provider about which vaccines you need.
How can I protect the immunocompromised people around me?
You never know who may be immunocompromised. The best way to protect immunocompromised people around you is to avoid spreading illnesses.
If you know you’re sick, isolate whenever possible. Wear a well-fitting mask around others—especially if you know that you’re sick or that you’ve been exposed to germs. Make sure you’re up to date on recommended vaccines, and practice regular hand-washing.
If you’re planning to spend time with someone who is immunocompromised, ask them what steps you can take to keep them safe.
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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Meditation for Fidgety Skeptics – by Dan Harris
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If you already meditate regularly, this book isn’t aimed at you (though you may learn a thing or two anyway—this reviewer, who has practiced meditation for the past 30 years, learned a thing!).
However, if you’re—as the title suggests—someone who hasn’t so far been inclined towards meditation, you could get the most out of this one. We’ll say more on this (obviously), but first, there’s one other group that may benefit from this book:
If you have already practiced meditation, and/or already understand and want its benefits, but never really made it stick as a habit.
Now, onto what you’ll get:
- A fair scientific overview of meditation as an increasingly evidence-based way to reduce stress and increase both happiness and productivity
- A good grounding in what meditation is and isn’t
- A how-to guide for building up a consistent meditation habit that won’t get kiboshed when you have a particularly hectic day—or a cold.
- An assortment of very common (and some less common) meditative practices to try
- Some great auxiliary tools to build cognitive restructuring into your meditation
We don’t usually cite other people’s reviews, but we love that one Amazon reviewer wrote:
❝I am 3 weeks into daily meditation practice, and I already notice that I am no longer constantly wishing for undercarriage rocket launchers while driving. I will always think your driving sucks, but I no longer wish you a violent death because of it. Yes, I live in Boston❞
Bottom line: if you’re not already meditating daily, this is definitely a book for you. And if you are, you may learn a thing or two anyway!
Click here to get your copy of Meditation For Fidgety Skeptics from Amazon today!
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Beat The Heat, With Fat
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Surviving Summer
Summer is upon us, for those of us in the Northern Hemisphere anyway, and given that nowadays each year tends to be hotter than the one before, on average, it pays to be prepared.
We’ve talked about dealing with the heat before:
Sun, Sea, And Sudden Killers To Avoid
All the above advice stands this summer too, but today we’re going to speak a little extra on not having a “default body”.
For much of medical literature and common health advice, the default body is that of a slim and/or athletic white cis man aged 25–35 with no disabilities.
When it comes to “women’s health”, this is often confined to “the bikini zone” and everything else is commonly treated based on research conducted with men.
Today we’ll be looking at a particular challenge for a wide variety of people, when it comes to heat…
Beating the heat, with fat
If you are fat, and/or have a bit of a tummy, and/or have breasts, this one’s for you.
Fat acts as an insulator, which naturally does no favors in hot weather. Carrying the weight around is also extra exercise, which also becomes a problem in hot weather. Fat people usually sweat more than thin people do, as a result.
Sweat is great for cooling down the body, because it takes heat with it when it evaporates off. However, that only works if it can evaporate off, and it can’t evaporate off if it’s trapped in a skin fold / fat roll.
If you’re fat, you may have plenty of those; if you have a bit of a tummy (if you’re not fat generally, this might be a leftover from pregnancy, or weight loss, or something else; how it got there doesn’t matter for our purposes today), you’ll have at least one under it, and if you have breasts, unless they’re quite small, you’ll have one under each breast, and potentially your cleavage may become an issue too.
Note: if you are perhaps a man who has fat in the place where breasts go, then medically this goes for you too, except that there’s not a societal expectation that you wear bra. Use today’s information as you see fit.
Sweat-wicking hacks
We don’t want sweat to stay in those folds—both because then it’s not doing its cooling-down job, and also, because it can cause a rash, and even yeast infections and/or bacterial infections.
So, we want there to be some barrier there. You could use something like vaseline or baby powder, as to prevent chafing, but fat better (more effective, and less messy) is to have some kind of cloth there that can wick the sweat away.
There are made-for-purpose curved cotton bands that exist, called “tummy liners”; here’s an example product on Amazon, or you could make your own if you’re so inclined. They’re breathable, absorbent, and reduce friction too, making everything a lot more comfortable.
And for breasts? Same deal, there are made-for-purpose cotton bra-liners that exist; here’s an example product on Amazon, or again, you could make your own if you feel so inclined. The important part is that it makes things so much comfortable, because let’s face it: wearing a bra in the summer is not comfortable.
So with these, it can become more comfortable (and the cotton liners are flat, so they’re not visible if one’s wearing a t-shirt or similar-coverage garment). You could go braless, of course, but then you’re back to having sweaty folds, so if you’re doing something other than swimming or lying on your back, you might want something there.
Different hydration rules
“People should drink this much per day” and guess what, those guidelines were based on, drumroll please, not fat people.
Sweating more means needing to hydrate more, and even without breaking a sweat, having a larger body than average (be it muscle, fat, or both) means having more body to hydrate. That’s simple math.
So instead, a good general guideline is half an ounce of water per your weight in pounds, per day:
How much water do I need each day?
Another good general guideline is to simply drink “little and often”, that is to say, always have a (hydrating!) drink on the go.
Take care!
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Prolonged Grief: A New Mental Disorder?
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The issue is not whether certain mental conditions are real—they are. It is how we conceptualize them and what we think treating them requires.
The latest edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) features a new diagnosis: prolonged grief disorder—used for those who, a year after a loss, still remain incapacitated by it. This addition follows more than a decade of debate. Supporters argued that the addition enables clinicians to provide much-needed help to those afflicted by what one might simply consider a too much of grief, whereas opponents insisted that one mustn’t unduly pathologize grief and reject an increasingly medicalized approach to a condition that they considered part of a normal process of dealing with loss—a process which in some simply takes longer than in others.
By including a condition in a professional classification system, we collectively recognize it as real. Recognizing hitherto unnamed conditions can help remove certain kinds of disadvantages. Miranda Fricker emphasizes this in her discussion of what she dubs hermeneutic injustice: a specific sort of epistemic injustice that affects persons in their capacity as knowers1. Creating terms like ‘post-natal depression’ and ‘sexual harassment’, Fricker argues, filled lacunae in the collectively available hermeneutic resources that existed where names for distinctive kinds of social experience should have been. The absence of such resources, Fricker holds, put those who suffered from such experiences at an epistemic disadvantage: they lacked the words to talk about them, understand them, and articulate how they were wronged. Simultaneously, such absences prevented wrong-doers from properly understanding and facing the harm they were inflicting—e.g. those who would ridicule or scold mothers of newborns for not being happier or those who would either actively engage in sexual harassment or (knowingly or not) support the societal structures that helped make it seem as if it was something women just had to put up with.
For Fricker, the hermeneutical disadvantage faced by those who suffer from an as-of-yet ill-understood and largely undiagnosed medical condition is not an epistemic injustice. Those so disadvantaged are not excluded from full participation in hermeneutic practices, or at least not through mechanisms of social coercion that arise due to some structural identity prejudice. They are not, in other words, hermeneutically marginalized, which for Fricker, is an essential characteristic of epistemic injustice. Instead, their situation is simply one of “circumstantial epistemic bad luck”2. Still, Fricker, too, can agree that providing labels for ill-understood conditions is valuable. Naming a condition helps raise awareness of it, makes it discursively available and, thus, a possible object of knowledge and understanding. This, in turn, can enable those afflicted by it to understand their experience and give those who care about them another way of nudging them into seeking help.
Surely, if adding prolonged grief disorder to the DSM-5 were merely a matter of recognizing the condition and of facilitating assistance, nobody should have any qualms with it. However, the addition also turns intense grief into a mental disorder—something for whose treatment insurance companies can be billed. With this, significant forces of interest enter the scene. The DSM-5, recall, is mainly consulted by psychiatrists. In contrast to talk-therapists like psychotherapists or psychoanalysts, psychiatrists constitute a highly medicalized profession, in which symptoms—clustered together as syndromes or disorders—are frequently taken to require drugs to treat them. Adding prolonged grief disorder thus heralds the advent of research into various drug-based grief therapies. Ellen Barry of the New York Times confirms this: “naltrexone, a drug used to help treat addiction,” she reports, “is currently in clinical trials as a form of grief therapy”, and we are likely to see a “competition for approval of medicines by the Food and Drug Administration.”3
Adding diagnoses to the DSM-5 creates financial incentives for players in the pharmaceutical industry to develop drugs advertised as providing relief to those so diagnosed. Surely, for various conditions, providing drug-induced relief from severe symptoms is useful, even necessary to enable patients to return to normal levels of functioning. But while drugs may help suppress feelings associated with intense grief, they cannot remove the grief. If all mental illnesses were brain diseases, they might be removed by adhering to some drug regimen or other. Note, however, that ‘mental illness’ is a metaphor that carries the implicit suggestion that just like physical illnesses, mental afflictions, too, are curable by providing the right kind of physical treatment. Unsurprisingly, this metaphor is embraced by those who stand to massively benefit from what profits they may reap from selling a plethora of drugs to those diagnosed with any of what seems like an ever-increasing number of mental disorders. But metaphors have limits. Lou Marinoff, a proponent of philosophical counselling, puts the point aptly:
Those who are dysfunctional by reason of physical illness entirely beyond their control—such as manic-depressives—are helped by medication. For handling that kind of problem, make your first stop a psychiatrist’s office. But if your problem is about identity or values or ethics, your worst bet is to let someone reify a mental illness and write a prescription. There is no pill that will make you find yourself, achieve your goals, or do the right thing.
Much more could be said about the differences between psychotherapy, psychiatry, and the newcomer in the field: philosophical counselling. Interested readers may benefit from consulting Marinoff’s work. Written in a provocative, sometimes alarmist style, it is both entertaining and—if taken with a substantial grain of salt—frequently insightful. My own view is this: from Fricker’s work, we can extract reasons to side with the proponents of adding prolonged grief disorder to the DSM-5. Creating hermeneutic resources that allow us to help raise awareness, promote understanding, and facilitate assistance is commendable. If the addition achieves that, we should welcome it. And yet, one may indeed worry that practitioners are too eager to move from the recognition of a mental condition to the implementation of therapeutic interventions that are based on the assumption that such afflictions must be understood on the model of physical disease. The issue is not whether certain mental conditions are real—they are. It is how we conceptualize them and what we think treating them requires.
No doubt, grief manifests physically. It is, however, not primarily a physical condition—let alone a brain disease. Grief is a distinctive mental condition. Apart from bouts of sadness, its symptoms typically include the loss of orientation or a sense of meaning. To overcome grief, we must come to terms with who we are or can be without the loved one’s physical presence in our life. We may need to reinvent ourselves, figure out how to be better again and whence to derive a new purpose. What is at stake is our sense of identity, our self-worth, and, ultimately, our happiness. Thinking that such issues are best addressed by popping pills puts us on a dangerous path, leading perhaps towards the kind of dystopian society Aldous Huxley imagined in his 1932 novel Brave New World. It does little to help us understand, let alone address, the moral and broader philosophical issues that trouble the bereaved and that lie at the root not just of prolonged grief but, arguably, of many so-called mental illnesses.
Footnotes:
1 For this and the following, cf. Fricker 2007, chapter 7.
2 Fricker 2007: 152
3 Barry 2022
References:
Barry, E. (2022). “How Long Should It Take to Grieve? Psychiatry Has Come Up With an Answer.” The New York Times, 03/18/2022, URL = https://www.nytimes.com/2022/03/18/health/prolonged-grief-
disorder.html [last access: 04/05/2022])
Fricker, M. (2007). Epistemic Injustice. Power & the Ethics of knowing. Oxford/New York: Oxford University Press.
Huxley, A. (1932). Brave New World. New York: Harper Brothers.
Marinoff, L. (1999). Plato, not Prozac! New York: HarperCollins Publishers.Professor Raja Rosenhagen is currently serving as Assistant Professor of Philosophy, Head of Department, and Associate Dean of Academic Affairs at Ashoka University. He earned his PhD in Philosophy from the University of Pittsburgh and has a broad range of philosophical interests (see here). He wrote this article a) because he was invited to do so and b) because he is currently nurturing a growing interest in philosophical counselling.
This article is republished from OpenAxis under a Creative Commons license. Read the original article.
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Wouldn’t It Be Nice To Have Regenerative Superpowers?
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The Best-Laid Schemes of Mice and Medical Researchers…
This is Dr. Ellen Heber-Katz. She’s an internationally-renowned immunologist and regeneration biologist, but her perhaps greatest discovery was accidental.
Unlike in Robert Burns’ famous poem, this one has a happy ending!
But it did involve the best-laid schemes of mice and medical researchers, and how they did indeed “gang gagly“ (or in the English translation, “go awry”).
How it started…
Back in 1995, she was conducting autoimmune research, and doing a mouse study. Her post-doc assistant was assigned to punch holes in the ears of mice that had received an experimental treatment, to distinguish them from the control group.
However, when the mice were later checked, none of them had holes (nor even any indication there ever had been holes punched)—the experiment was ruined, though the post-doc swore she did her job correctly.
So, they had to start from scratch in the new year, but again, a second batch of mice repeated the trick. No holes, no wounds, no scarring, not disruption to their fur, no damage to the cartilage that had been punched through.
In a turn of events worthy of a superhero origin story, they discovered that their laboratory-made autoimmune disease had accidentally given the mice super-healing powers of regeneration.
In the animal kingdom, this is akin to a salamander growing a new tail, but it’s not something usually found in mammals.
Read: A New Murine Model for Mammalian Wound Repair and Regeneration
How it’s going…
Dr. Heber-Katz and colleagues took another 20 years of work to isolate hypoxia-inducible factor-1a (HIF-1a) as a critical molecule that, if blocked, would eliminate the regenerative response.
Further, a drug (which they went on to patent), 1,4-dihydrophenonthrolin-4-one-3-carboxylic acid (1,4-DPCA), chemically induced this regenerative power:
See: Drug-induced regeneration in adult mice
Another 5 years later, they found that this same drug can be used to stimulate the regrowth of bones, too:
And now…
The research is continuing. Here’s the latest, a little over a month ago:
Epithelial–mesenchymal transition: an organizing principle of mammalian regeneration
Regrowing nerves has also been added into the list of things the drug can do.
What about humans?
Superpowered mice are all very well and good, but when can we expect this in humans?
The next step is testing the drug in larger animals, which she hopes to do next year, followed eventually by studies in humans.
Read the latest:
Regrowing nerves and healing without scars? A scientist’s career-long quest comes closer to fruition
Very promising!
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The Path To Revenue – by Theresa Marcroft
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So many books about start-ups skip right over the elephant in the room: survivorship bias. Not so for Marcroft! This book contains the most comprehensive and unapologetic treatment of it we’ve seen.
Less “here’s what Steve Jobs did right and here’s what Chocolate-Teapots-For-Dogs-R-Us did wrong; don’t mess up that badly and you’ll be fine”… and more realism. Marcroft gives us a many-angled critical analytic approach. In it, she examines why many things can seem similar in both content and presentation… but can cause growth or failure (and how and why), based on more than anecdotes and luck.
The book is information-dense (taking a marketing-centric approach) and/but well-presented in a very readable format.
If we can find any criticism of the book, it’s less about what’s in it and more about what’s not in it. This can never be a “your start-up bible!” book because it’s not comprehensive. It doesn’t cover assembling your team, for example. Nor does it give a lot of attention to management, preferring to focus on strategy.
But no single book can be all things, and we highly recommend this one—the marketing advice alone is more than worth the cost of the book!
Take Your First Step Along The Path To Revenue By Checking It Out On Amazon!
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