Lifespan – by Dr. David Sinclair
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Some books on longevity are science-heavy and heavy-going; others are glorified manifestos with much philosophy but little practical.
This one’s a sciencey-book written for a lay reader. It’s heavily referenced, but not a challenging read.
This book is divided into three parts:
- What we know (the past)
- What we’re learning (the present)
- Where we’re going (the future)
Let us quickly mention: the last part is principally sociology and economics, which are not the author’s wheelhouse. Some readers may enjoy his thoughts regardless, but we’re going to concentrate on where we found the real value of the book to be: in the first and second parts, where he brings his expertise to bear.
The first part lays the foundational knowledge that’s critical for understanding why the second part is so important.
Basically: aging is a genetic disease, and diseases can be cured. No disease has magical properties, even if sometimes it can seem for a while like they do, until we understand them better.
The second part covers a lot of recent and contemporary research into aging. We learn about such things as NAD-agonists that make elderly mice biologically young again, and the Greenland shark that easily lives for 500 years or so (currently the record-holder for vertebrates). And of course, biologically immortal jellyfish.
It’s not all animal studies though…
We learn of how NAD-agonists such as NMN have been promising in human studies too, along with resveratrol and the humble diabetes drug, metformin. These things alone may have the power to extend healthy life by 20%
Other recommendations pertain to lifestyle; the usual five things (diet, exercise, sleep, no alcohol, no smoking), as well as intermittent fasting and cryotherapy (cold showers/baths).
Bottom line: this book is informative and inspiring, and if you’ve been looking for an “in” to understanding the world of biogerontology and/or anti-aging research, this is it.
Get your copy of “Lifespan: Why We Age—And Why We Don’t Have To” from Amazon today!
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Yes, you still need to use sunscreen, despite what you’ve heard on TikTok
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Summer is nearly here. But rather than getting out the sunscreen, some TikTokers are urging followers to chuck it out and go sunscreen-free.
They claim it’s healthier to forgo sunscreen to get the full benefits of sunshine.
Here’s the science really says.
Karolina Grabowska/Pexels How does sunscreen work?
Because of Australia’s extreme UV environment, most people with pale to olive skin or other risk factors for skin cancer need to protect themselves. Applying sunscreen is a key method of protecting areas not easily covered by clothes.
Sunscreen works by absorbing or scattering UV rays before they can enter your skin and damage DNA or supportive structures such as collagen.
When UV particles hit DNA, the excess energy can damage our DNA. This damage can be repaired, but if the cell divides before the mistake is fixed, it causes a mutation that can lead to skin cancers.
The energy from a particle of UV (a photon) causes DNA strands to break apart and reconnect incorrectly. This causes a bump in the DNA strand that makes it difficult to copy accurately and can introduce mutations. NASA/David Herring The most common skin cancers are basal cell carcinoma (BCC) and squamous cell carcinoma (SCC). Melanoma is less common, but is the most likely to spread around the body; this process is called metastasis.
Two in three Australians will have at least one skin cancer in their lifetime, and they make up 80% of all cancers in Australia.
Around 99% of skin cancers in Australia are caused by excessive exposure to UV radiation.
Excessive exposure to UV radiation also affects the appearance of your skin. UVA rays are able to penetrate deep into the skin, where they break down supportive structures such as elastin and collagen.
This causes signs of premature ageing, such as deep wrinkling, brown or white blotches, and broken capillaries.
Sunscreen can help prevent skin cancers
Used consistently, sunscreen reduces your risk of skin cancer and slows skin ageing.
In a Queensland study, participants either used sunscreen daily for almost five years, or continued their usual use.
At the end of five years, the daily-use group had reduced their risk of squamous cell carcinoma by 40% compared to the other group.
Ten years later, the daily use group had reduced their risk of invasive melanoma by 73%
Does sunscreen block the health-promoting properties of sunlight?
The answer is a bit more complicated, and involves personalised risk versus benefit trade-offs.
First, the good news: there are many health benefits of spending time in the sun that don’t rely on exposure to UV radiation and aren’t affected by sunscreen use.
Sunscreen only filters UV rays, not all light. Ron Lach/Pexels Sunscreen only filters UV rays, not visible light or infrared light (which we feel as heat). And importantly, some of the benefits of sunlight are obtained via the eyes.
Visible light improves mood and regulates circadian rhythm (which influences your sleep-wake cycle), and probably reduces myopia (short-sightedness) in children.
Infrared light is being investigated as a treatment for several skin, neurological, psychiatric and autoimmune disorders.
So what is the benefit of exposing skin to UV radiation?
Exposing the skin to the sun produces vitamin D, which is critical for healthy bones and muscles.
Vitamin D deficiency is surprisingly common among Australians, peaking in Victoria at 49% in winter and being lowest in Queensland at 6% in summer.
Luckily, people who are careful about sun protection can avoid vitamin D deficiency by taking a supplement.
Exposing the skin to UV radiation might have benefits independent of vitamin D production, but these are not proven. It might reduce the risk of autoimmune diseases such as multiple sclerosis or cause release of a chemical that could reduce blood pressure. However, there is not enough detail about these benefits to know whether sunscreen would be a problem.
What does this mean for you?
There are some benefits of exposing the skin to UV radiation that might be blunted by sunscreen. Whether it’s worth foregoing those benefits to avoid skin cancer depends on how susceptible you are to skin cancer.
If you have pale skin or other factors that increase you risk of skin cancer, you should aim to apply sunscreen daily on all days when the UV index is forecast to reach 3.
If you have darker skin that rarely or never burns, you can go without daily sunscreen – although you will still need protection during extended times outdoors.
For now, the balance of evidence suggests it’s better for people who are susceptible to skin cancer to continue with sun protection practices, with vitamin D supplementation if needed.
Katie Lee, PhD Candidate, Dermatology Research Centre, The University of Queensland and Rachel Neale, Principal research fellow, QIMR Berghofer Medical Research Institute
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The End of Old Age – by Dr. Marc Agronin
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First, what this book is not: a book about ending aging. For that, you would want to check out “Ending Aging”, by Dr. Aubrey de Grey.
What this book actually is: a book about the purpose of aging. As in: “aging: to what end?”, and then the book answers that question.
Rather than viewing aging as solely a source of decline, this book (while not shying away from that) resolutely examines the benefits of old age—from clinically defining wisdom, to exploring the many neurological trade-offs (e.g., “we lose this thing but we get this other thing in the process”), and the assorted ways in which changes in our brain change our role in society, without relegating us to uselessness—far from it!
The style of the book is deep and meaningful prose throughout. Notwithstanding the author’s academic credentials and professional background in geriatric psychiatry, there’s no hard science here, just comprehensible explanations of psychiatry built into discussions that are often quite philosophical in nature (indeed, the author additionally has a degree in psychology and philosophy, and it shows).
Bottom line: if you’d like your own aging to be something you understand better and can actively work with rather than just having it happen to you, then this is an excellent book for you.
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Almonds vs Walnuts – Which is Healthier?
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Our Verdict
When comparing almonds to walnuts, we picked the almonds.
Why?
It wasn’t just our almond bias, but it was close!
In terms of macros, the main important differences are:
- Almonds are higher in protein
- Walnuts are higher in fats (they are healthy fats)
So far, so even.
In terms of vitamins, both are rich in many vitamins; mostly the same ones. However, walnuts have more of most of the B vitamins (except for B2 and B3, where almonds win easily), and almonds have more vitamin E by several orders of magnitude.
So far, so balanced.
Almonds have slightly more choline.
Almonds have a better mineral profile, with more of most minerals that they both contain, and especially, a lot more calcium.
Both nuts have [sometimes slightly different, but] comparable benefits against diabetes, cancer, neurodegeneration, and other diseases.
In summary
This one’s close. After balancing out the various “almonds have this but walnuts have that” equal-but-different benefits, we’re going to say almonds take first place by virtue of the better mineral profile, and more choline.
But: enjoy both!
Learn more
You might like this previous article of ours:
Why You Should Diversify Your Nuts
Take care!
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Healing Spices – by Dr. Bharat Aggarwal & Debora Yost
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This is exactly what the subtitle promises it to be, and more. It’s actually herbs and spices, but definitely mostly spices, and includes the kinds found in even the smallest supermarket, to some you might not have heard of, and might need to order online.
We are treated to an explanation of the health-giving properties of each (and any potential contraindications), as well as the culinary properties, many tables of what goes with what and how and why, and even recipes to use them in. For the more adventurous, there’s even advice on how to grow, prepare, and store each of them.
An extra benefit is that everything is cross-linked such that you can look things up by spice or by health condition or by flavor profile, and find what you need and what’ll go with it.
The style is simple and informational, clearly laid-out in encyclopedic form.
Bottom line: this book should be in your kitchen (or related nearby kitchen-book-place).
Click here to check out Healing Spices, and advance your culinary repertoire!
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Just Be Well – by Dr. Thomas Sult
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Firstly, what this is not: a “think yourself well” book. It’s not about just deciding to be well.
Rather, it’s about ensuring the foundations of wellness, from which the rest of good health can spring, and notably, an absence of chronic illness. In essence: enjoying chronic good health.
The prescription here is functional medicine, which stands on the shoulders of lifestyle medicine. This latter is thus briefly covered and the basics presented, but most of the book is about identifying the root causes of disease and eliminating them one by one, by taking into account the functions of the body’s processes, both in terms of pathogenesis (and thus, seeking to undermine that) and in terms of correct functioning (i.e., good health).
While the main focus of the book is on health rather than disease, he does cover a number of very common chronic illnesses, and how even in those cases where they cannot yet be outright cured, there’s a lot more that can be done for them than “take two of these and call your insurance company in the morning”, when the goal is less about management of symptoms (though that is also covered) and more about undercutting causes, and ensuring that even if one thing goes wrong, it doesn’t bring the entire rest of the system down with it (something that often happens without functional medicine).
The style is clear, simple, and written for the layperson without unduly dumbing things down.
Bottom line: if you would like glowingly good health regardless of any potential setbacks, this book can help your body do what it needs to for you.
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The Seven Principles for Making Marriage Work – by Dr. John Gottman
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A lot of relationship advice can seem a little wishy-washy. Hardline clinical work, on the other hand, can seem removed from the complex reality of married life. Dr. Gottman, meanwhile, strikes a perfect balance.
He looks at huge datasets, and he listens to very many couples. He famously isolated four relational factors that predict divorce with 91% accuracy, his “Four Horsemen”:
- Criticism
- Contempt
- Defensiveness
- Stonewalling
He also, as the title of this book promises (and we get a chapter-by-chapter deep-dive on each of them) looks at “Seven principles for making marriage work”. They’re not one-word items, so including them here would take up the rest of our space, and this is a book review not a book summary. However…
Dr. Gottman’s seven principles are, much like his more famous “four horsemen”, deeply rooted in science, while also firmly grounded in the reality of individual couples. Essentially, by listening to very many couples talk about their relationships, and seeing how things panned out with each of them in the long-term, he was able to see what things kept on coming up each time in the couples that worked out. What did they do differently?
And, that’s the real meat of the book. Science yes, but lots of real-world case studies and examples, from couples that worked and couples that didn’t.
In so doing, he provides a roadmap for couples who are serious about making their marriage the best it can be.
Bottom line: this is a must-have book for couples in general, no matter how good or bad the relationship.
- For some it’ll be a matter of realising “You know what; this isn’t going to work”
- For others, it’ll be a matter of “Ah, relief, this is how we can resolve that!”
- For still yet others, it’ll be a matter of “We’re doing these things right; let’s keep them forefront in our minds and never get complacent!”
- And for everyone who is in a relationship or thinking of getting into one, it’s a top-tier manual.
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