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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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Parenting a perfectionist? Here’s how you can respond
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Some children show signs of perfectionism from early on. Young children might become frustrated and rip up their drawing if it’s not quite right. Older children might avoid or refuse to do homework because they’re afraid to make a mistake.
Perfectionism can lead to children feeling overwhelmed, angry and frustrated, or sad and withdrawn.
And yet perfectionism isn’t considered all bad in our society. Being called a “perfectionist” can be a compliment – code for being a great worker or student, someone who strives to do their best and makes sure all jobs are done well.
These seemingly polarised views reflect the complex nature of perfectionism.
Annie Spratt/Unsplash What is perfectionism?
Researchers often separate perfectionism into two parts:
- perfectionistic strivings: being determined to meet goals and achieve highly
- perfectionistic concerns: worry about being able to meet high standards, and self-criticism about performance.
While perfectionistic strivings can be positive and lead to high achievement, perfectionistic concerns can lead to a higher chance of children developing eating disorders or anxiety and depression, and having lower academic achievement.
Perfectionistic concerns can result in lower academic achievement. Jessica Lewis/Unsplash Children and adolescents may experience perfectionism in relation to school work, sport, performance in art or music, or in relation to their own body.
Signs of perfectionistic concerns in children and adolescents may include:
- children being highly critical of themselves
- their reactions to mistakes seeming to be an overreaction
- intense preoccupation and worry over their standards and goals and/or procrastination
- significant change in performance, for example, lower academic results
- irritability and negative emotions, stress and feelings of worthlessness
- social problems with peers and friends, such as bullying and alienating themselves from peers.
A range of genetic, biological and environmental factors influence perfectionism in children. And as a parent, our role is important. While research evidence suggests we can’t successfully increase positive perfectionistic strivings in our children, harsh or controlling parenting can increase negative perfectionistic concerns in children.
Parents who are perfectionistic themselves can also model this to their children.
So, how can we walk the line between supporting our child’s interests and helping them to achieve their potential, without pressuring them and increasing the risk of negative outcomes?
Give them space to grow
A great metaphor is the gardener versus the carpenter described by psychology professor Alison Gopnik.
Instead of trying to build and shape our children by controlling them and their environment (like a carpenter), parents can embrace the spirit of the gardener – providing lots of space for children to grow in their own direction, and nourishing them with love, respect and trust.
Parents don’t need to control their child and their environment. Noah Silliman/Unsplash We can’t control who they become, so it’s better to sit back, enjoy the ride, and look forward to watching the person they grow into.
However, there is still plenty we can do as parents if our child is showing signs of perfectionism. We can role model to our children how to set realistic goals and be flexible when things change or go wrong, help our children manage stress and negative emotions, and create healthy balance in our family daily routine.
Set realistic goals
People with perfectionistic tendencies will often set unattainable goals. We can support the development of flexibility and realistic goal setting by asking curious questions, for example, “what would you need to do to get one small step closer to this goal?” Identifying upper and lower limits for goals is also helpful.
If your child is fixed on a high score at school, for example, set that as the “upper limit” and then support them to identify a “lower limit” they would find acceptable, even if they are less happy with the outcome.
This strategy may take time and practice to widen the gap between the two, but is useful to create flexibility over time.
If a goal is performance-based and the outcome cannot be guaranteed (for example, a sporting competition), encourage your child to set a personal goal they have more control over.
Parents can help children set goals they can achieve. liz99/Unsplash We can also have conversations about perfectionism from early on, and explain that everyone makes mistakes. In fact, it’s great to model this to our children – talking about our own mistakes and feelings, to show them that we ourselves are not perfect.
Talk aloud practices can help children to see that we “walk the walk”. For example, if you burn dinner you could reflect:
I’m disappointed because I put time and effort into that and it didn’t turn out as I expected. But we all make mistakes. I don’t get things right every time.
Manage stress and negative emotions
Some children and adolescents have a natural tendency towards perfectionism. Rather than trying to control their behaviour, we can provide gentle, loving support.
When our child or adolescent becomes frustrated, angry, sad or overwhelmed, we support them best by helping them to name, express and validate all of their emotions.
Parents may fear that acknowledging their child’s negative emotions will make the emotions worse, but the opposite is true.
Creating healthy balance
The building blocks of healthy child development are strong loving family relationships, good nutrition, creative play and plenty of physical activity, sleep and rest.
Perfectionism is associated with rigidity, and thinking that there is only one correct way to succeed. We can instead encourage flexibility and creativity in children.
Children’s brains grow through play. There is strong research evidence showing that creative, child-led play is associated with higher emotion regulation skills, and a range of cognitive skills, including problem-solving, memory, planning, flexibility and decision-making.
Play helps children’s brains grow. Mi Pham/Unsplash Play isn’t just for young children either – there’s evidence that explorative, creative play of any kind also benefits adolescents and adults.
There is also evidence that getting active outdoors in nature can promote children’s coping skills, emotion regulation and cognitive development.
Elizabeth Westrupp, Associate Professor in Psychology, Deakin University; Gabriella King, Associate Research Fellow, Deakin University, and Jade Sheen, Associate Professor, School of Psychology, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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How To Reduce Cortisol Levels Naturally
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Cortisol is a hormone that is important for us (we’d struggle to get up in the morning without it, for a start), but in this modern world we often have too much of it, too much of the time. How can we rebalance it? Dr. Mindy Pelz explains:
Lifestyle adjustments
A note in advance: the video makes frequent reference to things that “spike cortisol levels”, but this is probably intended as a stand-in for “raise cortisol levels”. Because, unlike for some things, in the case of cortisol, spikes aren’t usually a problem (indeed, they can be beneficial, and this is a large part of why cold showers and ice baths can be healthy; it’s an artificially induced cortisol spike, and this hormesis has an assortment of healthy benefits, each related to improving our body’s ability to switch quickly between states as appropriate); rather, it’s chronically high cortisol levels that are the problem. However, the video discusses things that can increase resting cortisol levels, so where she says “spike”, we suggest to read “raise”.
Dr. Pelz, an advocate of intermittent fasting, mentions that done incorrectly and/or for the same way for too long, fasting can raise cortisol levels and thus sabotage our efforts—so varying our fasting style can help avoid that. For example, 16:8, 5:2, longer fasts less frequently, etc.
On the topic of food, she also warns us of the dangers of ultra-processed food, harmful oils, and foods with added sugar, as these can all raise cortisol levels.
When it comes to exercise, she notes that intense exercise without adequate recovery can raise cortisol levels, so again it’s good to mix up one’s methods, vary one’s exercise routine, and allow each well-worked muscle-group adequate rest afterwards.
Dr. Pelz also talks mindset, and has her own interesting way of framing the well-established science that chronic stress means chronically high stress hormone (cortisol) levels; Dr. Pelz prefers to see it as negative vs positive thoughts, environments, etc.
Any discussion of cortisol management would be incomplete without discussing the importance of good quality sleep. Dr. Pelz doesn’t mention this at all in her video, but it’s important to bear in mind too!
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Lower Your Cortisol! (Here’s Why & How)
Take care!
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The Paleo Diet
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What’s The Real Deal With The Paleo Diet?
The Paleo diet is popular, and has some compelling arguments for it.
Detractors, meanwhile, have derided Paleo’s inclusion of modern innovations, and have also claimed it’s bad for the heart.
But where does the science stand?
First: what is it?
The Paleo diet looks to recreate the diet of the Paleolithic era—in terms of nutrients, anyway. So for example, you’re perfectly welcome to use modern cooking techniques and enjoy foods that aren’t from your immediate locale. Just, not foods that weren’t a thing yet. To give a general idea:
Paleo includes:
- Meat and animal fats
- Eggs
- Fruits and vegetables
- Nuts and seeds
- Herbs and spices
Paleo excludes:
- Processed foods
- Dairy products
- Refined sugar
- Grains of any kind
- Legumes, including any beans or peas
Enjoyers of the Mediterranean Diet or the DASH heart-healthy diet, or those with a keen interest in nutritional science in general, may notice they went off a bit with those last couple of items at the end there, by excluding things that scientific consensus holds should be making up a substantial portion of our daily diet.
But let’s break it down…
First thing: is it accurate?
Well, aside from the modern cooking techniques, the global market of goods, and the fact it does include food that didn’t exist yet (most fruits and vegetables in their modern form are the result of agricultural engineering a mere few thousand years ago, especially in the Americas)…
…no, no it isn’t. Best current scientific consensus is that in the Paleolithic we ate mostly plants, with about 3% of our diet coming from animal-based foods. Much like most modern apes.
Ok, so it’s not historically accurate. No biggie, we’re pragmatists. Is it healthy, though?
Well, health involves a lot of factors, so that depends on what you have in mind. But for example, it can be good for weight loss, almost certainly because of cutting out refined sugar and, by virtue of cutting out all grains, that means having cut out refined flour products, too:
Diet Review: Paleo Diet for Weight Loss
Measured head-to-head with the Mediterranean diet for all-cause mortality and specific mortality, it performed better than the control (Standard American Diet, or “SAD”), probably for the same reasons we just mentioned. However, it was outperformed by the Mediterranean Diet:
So in lay terms: the Paleo is definitely better than just eating lots of refined foods and sugar and stuff, but it’s still not as good as the Mediterranean Diet.
What about some of the health risk claims? Are they true or false?
A common knee-jerk criticism of the paleo-diet is that it’s heart-unhealthy. So much red meat, saturated fat, and no grains and legumes.
The science agrees.
For example, a recent study on long-term adherence to the Paleo diet concluded:
❝Results indicate long-term adherence is associated with different gut microbiota and increased serum trimethylamine-N-oxide (TMAO), a gut-derived metabolite associated with cardiovascular disease. A variety of fiber components, including whole grain sources may be required to maintain gut and cardiovascular health.❞
Bottom line:
The Paleo Diet is an interesting concept, and certainly can be good for short-term weight loss. In the long-term, however (and: especially for our heart health) we need less meat and more grains and legumes.
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Fruit, Fiber, & Leafy Greens… On A Low-FODMAP Diet!
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Fiber For FODMAP-Avoiders
First, let’s quickly cover: what are FODMAPs?
FODMAPs are fermentable oligosaccharides, disaccharides, monosaccharides, and polyols.
In plainer English: they’re carbohydrates that are resistant to digestion.
This is, for most people most of the time, a good thing, for example:
When Is A Fiber Not A Fiber? When It’s A Resistant Starch.
Not for everyone…
However, if you have inflammatory bowel syndrome (IBS), including ulcerative colitis, Crohn’s disease, or similar, then suddenly a lot of common dietary advice gets flipped on its head:
While digestion-resistant carbohydrates making it to the end parts of our digestive tract are good for our bacteria there, in the case of people with IBS or similar, it can be a bit too good for our bacteria there.
Which can mean gas (a natural by-product of bacterial respiration) accumulation, discomfort, water retention (as the pseudo-fiber draws water in and keeps it), and other related symptoms, causing discomfort, and potentially disease such as diarrhea.
Again: for most people this is not so (usually: quite the opposite; resistant starches improve things down there), but for those for whom it’s a thing, it’s a Big Bad Thing™.
Hold the veg? Hold your horses.
A common knee-jerk reaction is “I will avoid fruit and veg, then”.
Superficially, this can work, as many fruit & veg are high in FODMAPs (as are fermented dairy products, by the way).
However, a diet free from fruit and veg is not going to be healthy in any sustainable fashion.
There are, however, options for low-FODMAP fruit & veg, such as:
Fruits: bananas (if not overripe), kiwi, grapefruit, lemons, limes, melons, oranges, passionfruit, strawberries
Vegetables: alfalfa, bell peppers, bok choy, carrots, celery, cucumbers, eggplant, green beans, kale, lettuce, olives, parsnips, potatoes (and sweet potatoes, yams etc), radishes, spinach, squash, tomatoes*, turnips, zucchini
*our stance: botanically it’s a fruit, but culinarily it’s a vegetable.
For more on the science of this, check out:
Strategies for Producing Low FODMAPs Foodstuffs: Challenges and Perspectives ← table 2 is particularly informative when it comes to the above examples, and table 3 will advise about…
Bonus
Grains: oats, quinoa, rice, tapioca
…and wheat if the conditions in table 3 (linked above) are satisfied
(worth mentioning since grains also get a bad press when it comes to IBS, but that’s mostly because of wheat)
See also: Gluten: What’s The Truth?
Enjoy!
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Sleep Tracking, For Five Million Nights
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5 Sleep Phenotypes, By Actual Science
You probably know people can be broadly divided into “early birds” and “night owls”:
Early Bird Or Night Owl? Genes vs Environment
…and then the term “hummingbird” gets used for a person who flits between the two.
That’s three animals so far. If you read a book we reviewed recently, specifically this one:
The Power of When – by Dr. Michael Breus
…then you may have used the guide within to self-diagnose your circadian rhythm type (chronotype) according to Dr. Breus’s system, which divides people into bears, lions, wolves, and dolphins.
That’s another four animals. If you have a FitBit, it can “diagnose” you with being those and/or a menagerie of others, such as giraffe, hedgehog, parrot, and tortoise:
How Fitbit Developed the Sleep Profile Experience (Part 2 – Sleep Animals)
Five million nights
A team of researchers recently took a step away from this veritable zoo of 11 different animals and counting, and used a sophisticated modelling system to create a spatial-temporal map of people’s sleep habits, and this map created five main “islands” that people’s sleep habits could settle on, or sometimes move from island to island.
Those “five million nights” by the way? It was actually 5,095,798 nights! You might notice that would take from the 2020s to the 15970s to complete, so this was rather a matter of monitoring 33,152 individuals between January and October of the same year. Between them, they got those 5,095,798 nights of sleep (or in some cases, nights of little or no sleep, but still, they were there for the nights).
The five main phenotypes that the researchers found were:
- What we think of as “normal” sleep. In this phenotype, people get about eight hours of uninterrupted sleep for at least six days in a row.
- As above for half the nights, but they only sleep for short periods of time in bouts of less than three hours the other half.
- As per normal sleep, but with one interrupted night per week, consisting of a 5 hour sleep period and then broken sleep for a few more hours.
- As per normal sleep generally, but with occasional nights in which long bouts of sleep are separated by a mid-sleep waking.
- Sleeping for very short periods of time every night. This phenotype was the rarest the researchers found, and represents extremely disrupted sleep.
As you might suspect, phenotype 1 is healthier than phenotype 5. But that’s not hugely informational, as the correlation between getting good sleep and having good health is well-established. So, what did the study teach us?
❝We found that little changes in sleep quality helped us identify health risks. Those little changes wouldn’t show up on an average night, or on a questionnaire, so it really shows how wearables help us detect risks that would otherwise be missed.❞
More specifically,
❝We found that the little differences in how sleep disruptions occur can tell us a lot. Even if these instances are rare, their frequency is also telling. So it’s not just whether you sleep well or not – it’s the patterns of sleep over time where the key info hides❞
…and, which gets to the absolute point,
❝If you imagine there’s a landscape of sleep types, then it’s less about where you tend to live on that landscape, and more about how often you leave that area❞
In other words: if your sleep pattern is not ideal, that’s one thing and it’d probably be good to address it, by improving your sleep. However, if your sleep pattern changes phenotype without an obvious known reason why, this may be considered an alarm bell warning of something else that needs addressing, which may be an underlying illness or condition—meaning it can be worthwhile being a little extra vigilant when it comes to regular health screenings, in case something new has appeared.
Want to read more?
You can read the paper in full here:
Five million nights: temporal dynamics in human sleep phenotypes
Take care!
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These Top Few Things Make The Biggest Difference To Health
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The Best Few Interventions For The Best Health
Writer’s note: I was going to do something completely different for today (so that can go out another week now), but when reflecting on my own “what should I focus on in the new year?” (in terms of my own personal health goals and such) it occured to me that I should look back on the year’s articles, to take our own advice myself, and see what most important things I should make sure to focus on.
In so doing for myself, it occured to me that you, our subscribers who like condensed information and simple interventions for big positive effects, might also find value in a similar once-over. And so, today’s main feature was born!
Sometimes at 10almonds we talk about “those five things that affect everything”. They are:
- Good diet
- Good exercise
- Good sleep
- Not drinking
- Not smoking
If we were to add a sixth in terms of things that make a huge difference, it would be “manage stress effectively” and a seventh, beyond the scope of our newsletter, would be “don’t be socioeconomically disadvantaged” (e.g. poor, and/or part of some disprivileged minority group).
But as for those five we listed, it still leaves the question: what are the few most effective things we can do to improve them? Where can we invest our time/energy/effort for greatest effect?
Good diet
Best current science consistently recommends the Mediterranean Diet:
The Mediterranean Diet: What Is It Good For?
But it can be tweaked for specific desired health considerations:
Four Ways To Upgrade The Mediterranean Diet
Other most-effective dietary tweaks that impact a lot of other areas of health include looking after your gut health and looking after your blood sugars:
Making Friends With Your Gut (You Can Thank Us Later)
and
“Let Them Eat Cake”, She Said (10 Ways To Balance Blood Sugars)
Good exercise
Most exercise is good, but two of the most beneficial things that are (for most people) easy to implement are walking, and High-Intensity Interval Training:
How To Do HIIT (Without Wrecking Your Body)
Good sleep
This means quality and quantity! We cannot skimp on either and expect good health:
Why You Probably Need More Sleep
and as for quality,
The Head-To-Head Of Google and Apple’s Top Apps For Getting Your Head Down
Not drinking
According to the World Health Organization, the only safe amount of alcohol is zero.
See also:
Can We Drink To Good Health? (e.g. Red Wine & Heart Health)
and
Not smoking
We haven’t done a main feature on this! It’s probably not really necessary, as it’s not very contentious to say “smoking is bad for everything”.
WHO | Tobacco kills up to half its users who don’t quit
However, as a side-note, while cannabis is generally recognised as not as harmful as tobacco-based products, it has some fairly major drawbacks too. For some people, the benefits (e.g. pain relief) may outweigh the risks, though:
Final thoughts
Not sure where to start? We suggest this order of priorities, unless you have a major health condition that makes something else a higher priority:
- If you smoke, stop
- If you drink, reduce, or ideally stop
- Improve your diet
About that diet…
- Worry less about what to exclude, and instead focus on adding more variety of fruit/veg
- See also: Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- That said, if you’re looking for things to cut, sugar is a top candidate (and red meat is in clear second place albeit some way below)
When it comes to exercise, get your 10,000 daily steps in (actually, science says 8,000 steps is fine), and consider adding HIIT per our above article, when you feel like adding that in. As for that about the steps:
When it comes to sleep, if you’re taking care of the above things then this will probably take care of itself, if you don’t have a sleep-inconvenient lifestyle (e.g. shift work, just had a baby, etc) or a sleep disorder.
Take care!
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