Vision for Life, Revised Edition – by Dr. Meir Schneider
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The “ten steps” would be better called “ten exercises”, as they’re ten things that one can (and should) continue to do on an ongoing basis, rather than steps to progress through and then forget about.
We can’t claim to have tested the ten exercises for improvement (this reviewer has excellent eyesight and merely hopes to maintain such as she gets older) but the rationale is compelling, and the public testimonials abundant.
Dr. Schneider also talks about improving and correcting errors of refraction—in other words, doing the job of any corrective lenses you may currently be using. While he doesn’t claim miracles, it turns out there is a lot that can be done for common issues such as near-sightedness and far-sightedness, amongst others.
There’s a large section on managing more chronic pathological eye conditions than this reviewer previously knew existed; in some cases it’s a matter of making sure things don’t get worse, but in many others, there’s a recurring of theme of “and here’s an exercise for correcting that”.
The writing style is a little more “narrative prose” than we’d have liked, but the quality of the content more than makes up for any style preference issues.
Bottom line: the human body is a highly adaptive organism, and sometimes it just needs a little help to correct itself. This book can help with that.
Click here to check out Vision for Life, and take good care of yours!
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Science of Yoga – by Ann Swanson
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There are a lot of yoga books out there to say “bend this way, hold this that way” and so forth, but few that really explain what is going on, how, and why. And understanding those things is of course key to motivation and adherence. So that’s what this book provides!
The book is divided into sections, and in the first part we have a tour of human anatomy and physiology. This may seem almost unrelated to yoga, but is valuable necessary-knowledge to get the most out of the next section:
The next few parts are given over to yoga asanas (stretches, positions, poses, call them what you will in English) and now we are given a clear idea of what it is doing: we get to understand exactly what’s being stretched, what blood flow is being increased and how, what organs are being settled into their correct place, and many other such things.
Importantly, this means we also understand why certain things are the way they are, and why they can’t be done in some other slightly different but perhaps superficially easier way.
The style of the book is like a school textbook, really, but without patronizing the reader. The illustrations, of which there are many, are simple enough to be clear while being detailed enough to be informative.
Bottom line: if you’re ever doing yoga at home and wondering if you should cut a certain corner, this is the book that will tell you why you shouldn’t.
Click here to check out Science of Yoga, and optimize your practice!
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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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How to Read a Book – by Mortimer J. Adler and Charles Van Doren
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Are you a cover-to-cover person, or a dip-in-and-out person?
Mortimer Adler and Charles van Doren have made a science out of getting the most from reading books.
They help you find what you’re looking for (Maybe you want to find a better understanding of PCOS… maybe you want to find the definition of “heuristics”… maybe you want to find a new business strategy… maybe you want to find a romantic escape… maybe you want to find a deeper appreciation of 19th century poetry, maybe you want to find… etc).
They then help you retain what you read, and make sure that you don’t miss a trick.
Whether you read books so often that optimizing this is of huge value for you, or so rarely that when you do, you want to make it count, this book could make a real difference to your reading experience forever after.
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Redcurrants vs Cranberries – Which is Healthier?
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Our Verdict
When comparing redcurrants to cranberries, we picked the redcurrants.
Why?
First know: here we’re comparing raw redcurrants to raw cranberries, with no additives in either case. If you buy jelly made from either, or if you buy dried fruits but the ingredients list has a lot of added sugar and often some vegetable oil, then that’s going to be very different. But for now… Let’s look at just the fruits:
In terms of macros, redcurrants are higher in carbs, but also higher in fiber, and have the lower glycemic index as cranberries have nearly 2x the GI.
When it comes to vitamins, redcurrants have more of vitamins B1, B2, B6, B9, C, K, and choline, while cranberries have more of vitamins A, B5, and E. In other words, a clear win for redcurrants.
In the category of minerals, redcurrants sweep even more convincingly with a lot more calcium, copper, iron, magnesium, phosphorus, potassium, selenium, and zinc. On the other hand, cranberries boast a little more manganese; they also have about 2x the sodium.
Both berries have generous amounts of assorted phytochemicals (flavonoids and others), and/but nothing to set one ahead of the other.
As per any berries that aren’t poisonous, both of these are fine choices for most people most of the time, but redcurrants win with room to spare in most categories.
Want to learn more?
You might like to read:
Health Benefits Of Cranberries (But: You’d Better Watch Out)
Take care!
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The Not-So-Sweet Science Of Sugar Addiction
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One
LumpMechanism Of Addiction Or Two?
In Tuesday’s newsletter, we asked you to what extent, if any, you believe sugar is addictive; we got the above-depicted, below-described, set of responses:
- About 47% said “Sugar is chemically addictive, comparable to alcohol”
- About 34% said “Sugar is chemically addictive, comparable to cocaine”
- About 11% said “Sugar is not addictive; that’s just excuse-finding hyperbole”
- About 9% said “Sugar is a behavioral addiction, comparable to video gaming”
So what does the science say?
Sugar is not addictive; that’s just excuse-finding hyperbole: True or False?
False, by broad scientific consensus. As ever, the devil’s in the
detailsdefinitions, but while there is still discussion about how best to categorize the addiction, the scientific consensus as a whole is generally: sugar is addictive.That doesn’t mean scientists* are a hive mind, and so there will be some who disagree, but most papers these days are looking into the “hows” and “whys” and “whats” of sugar addiction, not the “whether”.
*who are also, let us remember, a diverse group including chemists, neurobiologists, psychologists, social psychologists, and others, often collaborating in multidisciplinary teams, each with their own focus of research.
Here’s what the Center of Alcohol and Substance Use Studies has to say, for example:
Sugar Addiction: More Serious Than You Think
Sugar is a chemical addiction, comparable to alcohol: True or False?
True, broadly, with caveats—for this one, the crux lies in “comparable to”, because the neurology of the addiction is similar, even if many aspects of it chemically are not.
In both cases, sugar triggers the release of dopamine while also (albeit for different chemical reasons) having a “downer” effect (sugar triggers the release of opioids as well as dopamine).
Notably, the sociology and psychology of alcohol and sugar addictions are also similar (both addictions are common throughout different socioeconomic strata as a coping mechanism seeking an escape from emotional pain).
See for example in the Journal of Psychoactive Drugs:
On the other hand, withdrawal symptoms from heavy long-term alcohol abuse can kill, while withdrawal symptoms from sugar are very much milder. So there’s also room to argue that they’re not comparable on those grounds.
Sugar is a chemical addiction, comparable to cocaine: True or False?
False, broadly. There are overlaps! For example, sugar drives impulsivity to seek more of the substance, and leads to changes in neurobiological brain function which alter emotional states and subsequent behaviours:
The impact of sugar consumption on stress driven, emotional and addictive behaviors
However!
Cocaine triggers a release of dopamine (as does sugar), but cocaine also acts directly on our brain’s ability to remove dopamine, serotonin, and norepinephrine:
The Neurobiology of Cocaine Addiction
…meaning that in terms of comparability, they (to use a metaphor now, not meaning this literally) both give you a warm feeling, but sugar does it by turning up the heating a bit whereas cocaine does it by locking the doors and burning down the house. That’s quite a difference!
Sugar is a behavioral addiction, comparable to video gaming: True or False?
True, with the caveat that this a “yes and” situation.
There are behavioral aspects of sugar addiction that can reasonably be compared to those of video gaming, e.g. compulsion loops, always the promise of more (without limiting factors such as overdosing), anxiety when the addictive element is not accessible for some reason, reduction of dopaminergic sensitivity leading to a craving for more, etc. Note that the last is mentioning a chemical but the mechanism itself is still behavioral, not chemical per se.
So, yes, it’s a behavioral addiction [and also arguably chemical in the manners we’ve described earlier in this article].
For science for this, we refer you back to:
The impact of sugar consumption on stress driven, emotional and addictive behaviors
Want more?
You might want to check out:
Beating Food Addictions: When It’s More Than “Just” Cravings
Take care!
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ADHD 2.0 – by Dr. Edward Hallowell & Dr. John Ratey
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A lot of ADHD literature is based on the assumption that the reader is a 30-something parent of a child with ADHD. This book, on the other hand, addresses all ages, and includes just as readily the likelihood that the person with ADHD is the reader, and/or the reader’s partner.
The authors cover such topics as:
- ADHD mythbusting, before moving on to…
- The problems of ADHD, and the benefits that those exact same traits can bring too
- How to leverage those traits to get fewer of the problems and more of the benefits
- The role of diet beyond the obvious, including supplementation
- The role of specific exercises (especially HIIT, and balance exercises) in benefiting the ADHD brain
- The role of medications—and arguments for and gainst such
The writing style is… Thematic, let’s say. The authors have ADHD and it shows. So, expect comprehensive deep-dives from whenever their hyperfocus mode kicked in, and expect no stones left unturned. That said, it is very readable, and well-indexed too, for ease of finding specific sub-topics.
Bottom line: if you are already very familiar with ADHD, you may not learn much, and might reasonably skip this one. However, if you’re new to the topic, this book is a great—and practical—primer.
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