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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Brazil Nuts vs Cashews – Which is Healthier?
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Our Verdict
When comparing Brazil nuts to cashews, we picked the cashews.
Why?
Looking at the macros first, Brazil nuts have more fat and fiber, while cashews have more carbs and protein. So, it really comes down to what you want to prioritize. We’d generally consider fiber the tie-breaker, making this category a subjective marginal win for Brazil nuts—and especially marginal since they are both low glycemic index foods in any case.
When it comes to vitamins, Brazil nuts have more of vitamins C, E, and choline, while cashews have more of vitamins B2, B3, B5, B6, B7, B9, and K, so while both are great, this category is a clear by-the-numbers win for cashews.
The category of minerals is an interesting one. Brazil nuts have more calcium, magnesium, phosphorus, and selenium, while cashews have more copper, iron, manganese, and zinc. That would be a 4:4 tie, but let’s take a closer look at those selenium levels:
- A cup of cashews contains 109% of the RDA of selenium. Your hair will be luscious and shiny.
- A cup of Brazil nuts contains 10,456% of the RDA of selenium. This is way past the point of selenium toxicity, and your (luscious, shiny) hair will fall out.
For this reason, it’s recommended to eat no more than 3–4 Brazil nuts per day.
We consider that a point against Brazil nuts.
Adding up the section makes for a win for cashews. Of course, enjoy Brazil nuts too if you will, but in careful moderation please!
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
Take care!
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Time Smart – by Dr. Ashley Whillans
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First, what this is not: it’s not a productivity book.
What is rather: a book of better wellbeing.
There is a little overlap, insofar as getting “time smart” in the ways that Dr. Whillans recommends will give you more ability to also be more productive—if that’s what you want.
She talks us through time traps and the “time poverty epidemic”, as well as steps to finding time and funding time. Perhaps most critical idea-wise is the chapter on building a “time-affluence habit”, making decisions that prioritize your time-freedom where you can—which in turn will allow you to build yet more. Kind of like compound interest really, but for time.
The writing style is a conversational tone, but peppered with bullet-point lists and charts and the like from time to time, and often with citations to back up claims. It makes for a very readable book, and yet one that’s also inspiring of the confidence that it’s more than just one person’s opinion.
Bottom line: if you sometimes feel like you could do everything you want to if you could just find the time, this book can help you get there.
Click here to check out Time Smart, and live your most satisfying life!
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Does intermittent fasting increase or decrease our risk of cancer?
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Research over the years has suggested intermittent fasting has the potential to improve our health and reduce the likelihood of developing cancer.
So what should we make of a new study in mice suggesting fasting increases the risk of cancer?
Stock-Asso/Shutterstock What is intermittent fasting?
Intermittent fasting means switching between times of eating and not eating. Unlike traditional diets that focus on what to eat, this approach focuses on when to eat.
There are lots of commonly used intermittent fasting schedules. The 16/8 plan means you only eat within an eight-hour window, then fast for the remaining 16 hours. Another popular option is the 5:2 diet, where you eat normally for five days then restrict calories for two days.
In Australia, poor diet contributes to 7% of all cases of disease, including coronary heart disease, stroke, type 2 diabetes, and cancers of the bowel and lung. Globally, poor diet is linked to 22% of deaths in adults over the age of 25.
Intermittent fasting has gained a lot of attention in recent years for its potential health benefits. Fasting influences metabolism, which is how your body processes food and energy. It can affect how the body absorbs nutrients from food and burns energy from sugar and fat.
What did the new study find?
The new study, published in Nature, found when mice ate again after fasting, their gut stem cells, which help repair the intestine, became more active. The stem cells were better at regenerating compared with those of mice who were either totally fasting or eating normally.
This suggests the body might be better at healing itself when eating after fasting.
However, this could also have a downside. If there are genetic mutations present, the burst of stem cell-driven regeneration after eating again might make it easier for cancer to develop.
Polyamines – small molecules important for cell growth – drive this regeneration after refeeding. These polyamines can be produced by the body, influenced by diet, or come from gut bacteria.
The findings suggest that while fasting and refeeding can improve stem cell function and regeneration, there might be a tradeoff with an increased risk of cancer, especially if fasting and refeeding cycles are repeated over time.
While this has been shown in mice, the link between intermittent fasting and cancer risk in humans is more complicated and not yet fully understood.
What has other research found?
Studies in animals have found intermittent fasting can help with weight loss, improve blood pressure and blood sugar levels, and subsequently reduce the risks of diabetes and heart disease.
Research in humans suggests intermittent fasting can reduce body weight, improve metabolic health, reduce inflammation, and enhance cellular repair processes, which remove damaged cells that could potentially turn cancerous.
However, other studies warn that the benefits of intermittent fasting are the same as what can be achieved through calorie restriction, and that there isn’t enough evidence to confirm it reduces cancer risk in humans.
What about in people with cancer?
In studies of people who have cancer, fasting has been reported to protect against the side effects of chemotherapy and improve the effectiveness of cancer treatments, while decreasing damage to healthy cells.
Prolonged fasting in some patients who have cancer has been shown to be safe and may potentially be able to decrease tumour growth.
On the other hand, some experts advise caution. Studies in mice show intermittent fasting could weaken the immune system and make the body less able to fight infection, potentially leading to worse health outcomes in people who are unwell. However, there is currently no evidence that fasting increases the risk of bacterial infections in humans.
So is it OK to try intermittent fasting?
The current view on intermittent fasting is that it can be beneficial, but experts agree more research is needed. Short-term benefits such as weight loss and better overall health are well supported. But we don’t fully understand the long-term effects, especially when it comes to cancer risk and other immune-related issues.
Since there are many different methods of intermittent fasting and people react to them differently, it’s hard to give advice that works for everyone. And because most people who participated in the studies were overweight, or had diabetes or other health problems, we don’t know how the results apply to the broader population.
For healthy people, intermittent fasting is generally considered safe. But it’s not suitable for everyone, particularly those with certain medical conditions, pregnant or breastfeeding women, and people with a history of eating disorders. So consult your health-care provider before starting any fasting program.
Amali Cooray, PhD Candidate in Genetic Engineering and Cancer, WEHI (Walter and Eliza Hall Institute of Medical Research)
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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White Bread vs White Pasta – Which Is Healthier?
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Our Verdict
When comparing a white bread to a white pasta, we picked the pasta.
Why?
Neither are great for the health! But like for like, the glycemic index of the bread is usually around 150% of the glycemic index for pasta.
All that said, we heartily recommend going for wholegrain in either case!
Bonus tip: cooking pasta “al dente”, so it is still at least a little firm to the bite, results in a lower GI compared to being boiled to death.
Bonus bonus tip: letting pasta cool increases resistant starches. You can then reheat the pasta without losing this benefit.
Please don’t put it in the microwave though; you will make an Italian cry. Instead, simply put it in a colander and pour boiling water over it, and then serve in your usual manner (a good approach if serving it separately is: put it in the serving bowl/dish/pan, drizzle a little extra virgin olive oil and a little cracked black pepper, stir to mix those in, and serve)
Enjoy!
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The Cough Doctor
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The Cough Doctor
This is Dr. Peter Small, who worked in epidemiology since the beginning of HIV epidemic. He became a pioneer in the field of molecular epidemiology. As such, his work was a guiding beacon for the public health response to the resurgence of tuberculosis. He’s travelled the world spending years in various institutions studying all manner of respiratory illnesses…. These have ranged from tuberculosis to pneumonia to lung cancer and (back to epidemiology) Covid-19.
He’s now the Chief Medical Officer at…
Hyfe
Hyfe, a medical AI company, was founded in 2020. Its objective: to build acoustic tools for respiratory diagnostics and monitoring.
In other words: it records coughs and collects data about coughing.
❝It’s ironic how much people focus on counting steps while ignoring cough, which is far more consequential. Hyfe is a science-driven company with the technology to make cough count. Particularly now, with increased awareness of cough and the rapid growth of digital health driven by Covid-19, this technology can improve the lives of patients, the care provided by doctors, and the efficiency of health systems.❞
~ Dr. Peter Small, CMO, Hyfe
How does it do it?
Hyfe’s AI monitors the number of times a person coughs and the sound of the cough through any smartphone or other smart device.
This data collected over time provides increasingly more reliable information than a single visit to the doctor! By constantly listening and analyzing, it can detect patterns that might otherwise go unnoticed.
How big is this “big data” effort?
Hyfe maintains the largest cough dataset in the world. This means it can compare the sound of a patient’s cough with more than 400 million cough-like sounds from 83 countries across all continents.
The human brain doesn’t handle big numbers well. So, just to illustrate: if the average cough is 1 second long, that means it’d take more than 12 years to listen to them all.
Hyfe, meanwhile, can:
- listen to many things simultaneously
- index them all against user and location,
- use its ever-growing neural net to detect and illustrate patterns.
It’s so attentive, that it can learn to distinguish between different people’s coughs in the same household.
❝Companies like Google Health see even basic information such as getting an accurate count of the number of times a person coughs a day as a useful resource, and part of a larger need to collect and chronicle more health information to refine the way doctors diagnose disease and manage treatments in the future.❞
What are the public health implications?
The most obvious application is to note when there’s a spike in coughing, and see how such spikes grow and spread (if they do), to inform of contagion risks.
Another is to cross-reference it with data about local environmental allergens. Knowing how things like pollution and even pollen affect individuals differently could be helpful in identifying (and managing) chronic conditions like asthma.
What are the private health implications?
❝It’s going to transform the whole clinical approach for this common and chronic symptom. Patients will come in, have the data on how much they are coughing, and the physician can suggest a treatment based on that information to see if it makes the coughs better❞
~ Dr. Peter Small
Dr. Small’s colleague Dr. Cai, speaking for Google Health on this project, sees even more utility for diagnostics:
❝When I was in medical school, never ever did they teach us that we could listen to somebody cough and identify whether that person has TB (tuberculosis), COPD, or a tumor. But I keep seeing more and more studies of people coughing into a microphone, and an algorithm can detect whether somebody has TB with 95% specificity and sensitivity, or if someone has pneumonia or an exacerbation of COPD❞
~ Dr. Lawrence Cai
And the privacy implications?
Perhaps you don’t quite fancy the idea of not being able to cough without Google knowing about it. Hyfe’s software is currently opt-in, but…
If you cough near someone else’s Hyfe app, their app will recognize you’re not the app’s user, and start building a profile for you. Of course, that won’t be linked to your name, email address, or other IDs, as it would if you were the app’s user.
Hyfe will ask to connect to your social media, to collect more information about you and your friends.
Whether you’d like to try this or perhaps you’re just curious to learn more about this fascinating project, you can check out:
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7 Tips To Burn Fat & Build Muscle At The Same Time
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Cori Lefkowith, of “Redefining Strength” and “Strong At Any Age” fame, has her formula to share:
Know your priorities
We’ll not keep the 7 tips a mystery; they are:
- Determine your primary goal: decide whether your main focus is losing fat while building muscle or building muscle while trimming up. This choice will influence your calorie intake, macros, and cardio approach.
- Start tracking: spend 7–14 days logging your current food intake, including calories, protein, carbs, and fats, without taking any particular action to change them yet. Understanding your baseline will help tailor your diet and exercise plan.
- Prioritize strength training: focus on strength work over cardio to build muscle. Avoid turning strength sessions into cardio by rushing between sets—allow adequate rest for muscle progression.
- Center your meals on protein: adjust your protein intake based on your primary goal. For fat loss while gaining muscle, aim for 40-45% of calories from protein. For building muscle while losing fat, aim for 30-40% protein, with attention to maintaining sufficient carbs.
- Set your calories: after adjusting protein, fine-tune your calorie intake. However, make only small changes (e.g. 100 calories up or down) and reassess every 2–3 weeks to avoid extreme deficits or surpluses.
- Adjust your cardio: prioritize strength training but use walking as low-impact cardio. Avoid excessive cardio that may hinder muscle gains, and use strategic HIIT sessions if needed.
- Ditch the scale: avoid using the scale as your sole measure of progress. Instead, rely on measurements, progress photos, and how your clothes fit to track body recomposition effectively.
For more on all of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Can You Gain Muscle & Lose Fat At The Same Time? ← we got this question in our Q&A day not long back, and here was our answer. We went for a less numbers-based approach, and a more principles-based approach. Both ways work, so by all means pick whichever method you personally find better suits how you like to do things!
Take care!
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