Spark – by Dr. John Ratey
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We all know that exercise is good for mental health as well as physical. So, what’s so revolutionary about this “revolutionary new science of exercise and the brain”?
A lot of it has to do with the specific neuroscience of how exercise has not only a mood-boosting effect (endorphins) and neuroprotective effect (helping to guard against cognitive decline), but also promotes neuroplasticity… e.g., the creation and strengthening of neural pathways, as well as boosting the structure of the brain in some parts such as the cerebellum.
The book also covers not just “exercise has these benefits”, but also the “how this works” of all kinds of brain benefits, including:
- against Alzheimer’s
- mitigating ADHD
- managing menopause
- dealing with addiction
…and more. And once we understand how something works, we’re far more likely to be motivated to actually do the kinds of exercises that give the specific benefits we want/need. Which is very much the important part!
In short: this book will tell you what you need to know to get you doing the exercises you need to enjoy those benefits—very much worth it!
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What’s the difference between vegan and vegetarian?
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What’s the difference? is a new editorial product that explains the similarities and differences between commonly confused health and medical terms, and why they matter.
Vegan and vegetarian diets are plant-based diets. Both include plant foods, such as fruits, vegetables, legumes and whole grains.
But there are important differences, and knowing what you can and can’t eat when it comes to a vegan and vegetarian diet can be confusing.
So, what’s the main difference?
What’s a vegan diet?
A vegan diet is an entirely plant-based diet. It doesn’t include any meat and animal products. So, no meat, poultry, fish, seafood, eggs, dairy or honey.
What’s a vegetarian diet?
A vegetarian diet is a plant-based diet that generally excludes meat, poultry, fish and seafood, but can include animal products. So, unlike a vegan diet, a vegetarian diet can include eggs, dairy and honey.
But you may be wondering why you’ve heard of vegetarians who eat fish, vegetarians who don’t eat eggs, vegetarians who don’t eat dairy, and even vegetarians who eat some meat. Well, it’s because there are variations on a vegetarian diet:
- a lacto-ovo vegetarian diet excludes meat, poultry, fish and seafood, but includes eggs, dairy and honey
- an ovo-vegetarian diet excludes meat, poultry, fish, seafood and dairy, but includes eggs and honey
- a lacto-vegetarian diet excludes meat, poultry, fish, seafood and eggs, but includes dairy and honey
- a pescatarian diet excludes meat and poultry, but includes eggs, dairy, honey, fish and seafood
- a flexitarian, or semi-vegetarian diet, includes eggs, dairy and honey and may include small amounts of meat, poultry, fish and seafood.
Are these diets healthy?
A 2023 review looked at the health effects of vegetarian and vegan diets from two types of study.
Observational studies followed people over the years to see how their diets were linked to their health. In these studies, eating a vegetarian diet was associated with a lower risk of developing cardiovascular disease (such as heart disease or a stroke), diabetes, hypertension (high blood pressure), dementia and cancer.
For example, in a study of 44,561 participants, the risk of heart disease was 32% lower in vegetarians than non-vegetarians after an average follow-up of nearly 12 years.
Further evidence came from randomised controlled trials. These instruct study participants to eat a specific diet for a specific period of time and monitor their health throughout. These studies showed eating a vegetarian or vegan diet led to reductions in weight, blood pressure, and levels of unhealthy cholesterol.
For example, one analysis combined data from seven randomised controlled trials. This so-called meta-analysis included data from 311 participants. It showed eating a vegetarian diet was associated with a systolic blood pressure (the first number in your blood pressure reading) an average 5 mmHg lower compared with non-vegetarian diets.
It seems vegetarian diets are more likely to be healthier, across a number of measures.
For example, a 2022 meta-analysis combined the results of several observational studies. It concluded a vegetarian diet, rather than vegan diet, was recommended to prevent heart disease.
There is also evidence vegans are more likely to have bone fractures than vegetarians. This could be partly due to a lower body-mass index and a lower intake of nutrients such as calcium, vitamin D and protein.
But it can be about more than just food
Many vegans, where possible, do not use products that directly or indirectly involve using animals.
So vegans would not wear leather, wool or silk clothing, for example. And they would not use soaps or candles made from beeswax, or use products tested on animals.
The motivation for following a vegan or vegetarian diet can vary from person to person. Common motivations include health, environmental, ethical, religious or economic reasons.
And for many people who follow a vegan or vegetarian diet, this forms a central part of their identity.
So, should I adopt a vegan or vegetarian diet?
If you are thinking about a vegan or vegetarian diet, here are some things to consider:
- eating more plant foods does not automatically mean you are eating a healthier diet. Hot chips, biscuits and soft drinks can all be vegan or vegetarian foods. And many plant-based alternatives, such as plant-based sausages, can be high in added salt
- meeting the nutrient intake targets for vitamin B12, iron, calcium, and iodine requires more careful planning while on a vegan or vegetarian diet. This is because meat, seafood and animal products are good sources of these vitamins and minerals
- eating a plant-based diet doesn’t necessarily mean excluding all meat and animal products. A healthy flexitarian diet prioritises eating more whole plant-foods, such as vegetables and beans, and less processed meat, such as bacon and sausages
- the Australian Dietary Guidelines recommend eating a wide variety of foods from the five food groups (fruit, vegetables, cereals, lean meat and/or their alternatives and reduced-fat dairy products and/or their alternatives). So if you are eating animal products, choose lean, reduced-fat meats and dairy products and limit processed meats.
Katherine Livingstone, NHMRC Emerging Leadership Fellow and Senior Research Fellow at the Institute for Physical Activity and Nutrition, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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An RSV vaccine has been approved for people over 60. But what about young children?
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The Therapeutic Goods Administration (TGA) has approved a vaccine against respiratory syncytial virus (RSV) in Australia for the first time. The shot, called Arexvy and manufactured by GSK, will be available by prescription to adults over 60.
RSV is a contagious respiratory virus which causes an illness similar to influenza, most notably in babies and older adults.
So while it will be good to have an RSV vaccine available for older people, where is protection up to for the youngest children?
A bit about RSV
RSV was discovered in chimpanzees with respiratory illness in 1956, and was soon found to be a common cause of illness in humans.
There are two key groups of people we would like to protect from RSV: babies (up to about one year old) and people older than 60.
Babies tend to fill up hospitals during the RSV season in late spring and winter in large numbers, but severe infection requiring admission to intensive care is less common.
In babies and younger children, RSV generally causes a wheezing asthma-like illness (bronchiolitis), but can also cause pneumonia and croup.
Although there are far fewer hospital admissions among older people, they can develop severe disease and die from an infection.
RSV vaccines for older people
For older adults, there are actually several RSV vaccines in the pipeline. The recent Australian TGA approval of Arexvy is likely to be the first of several, with other vaccines from Pfizer and Moderna currently in development.
The GSK and Pfizer RSV vaccines are similar. They both contain a small component of the virus, called the pre-fusion protein, that the immune system can recognise.
Both vaccines have been shown to reduce illness from RSV by more than 80% in the first season after vaccination.
In older adults, side effects following Arexvy appear to be similar to other vaccines, with a sore arm and generalised aches and fatigue frequently reported.
Unlike influenza vaccines which are given each year, it is anticipated the RSV vaccine would be a one-off dose, at least at this stage.
Protecting young children from RSV
Younger babies don’t tend to respond well to some vaccines due to their immature immune system. To prevent other diseases, this can be overcome by giving multiple vaccine doses over time. But the highest risk group for RSV are those in the first few months of life.
To protect this youngest age group from the virus, there are two potential strategies available instead of vaccinating the child directly.
The first is to give a vaccine to the mother and rely on the protective antibodies passing to the infant through the placenta. This is similar to how we protect babies by vaccinating pregnant women against influenza and pertussis (whooping cough).
The second is to give antibodies directly to the baby as an injection. With both these strategies, the protection provided is only temporary as antibodies wane over time, but this is sufficient to protect infants through their highest risk period.
Abrysvo, the Pfizer RSV vaccine, has been trialled in pregnant women. In clinical trials, this vaccine has been shown to reduce illness in infants for up to six months. It has been approved in pregnant women in the United States, but is not yet approved in Australia.
An antibody product called palivizumab has been available for many years, but is only partially effective and extremely expensive, so has only been given to a small number of children at very high risk.
A newer antibody product, nirsevimab, has been shown to be effective in reducing infections and hospitalisations in infants. It was approved by the TGA in November, but it isn’t yet clear how this would be accessed in Australia.
What now?
RSV, like influenza, is a major cause of respiratory illness, and the development of effective vaccines represents a major advance.
While the approval of the first vaccine for older people is an important step, many details are yet to be made available, including the cost and the timing of availability. GSK has indicated its vaccine should be available soon. While the vaccine will initially only be available on private prescription (with the costs paid by the consumer), GSK has applied for it to be made free under the National Immunisation Program.
In the near future, we expect to hear further news about the other vaccines and antibodies to protect those at higher risk from RSV disease, including young children.
Allen Cheng, Professor of Infectious Diseases, Monash University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Thinking, Fast and Slow – by Dr. Daniel Kahneman
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We all try to make the best decisions we can with the information available… Don’t we?
Yet, somehow, a survival chance of 90% seems better than a mortality rate of 10%, and as it turns out, we as fallible humans are prey to all manner of dubious heuristics.
Nobel Prize winner Dr. Daniel Kahneman lays out for us two sytems of thought process:
- Fast, intuitive, emotional
- Slow, deliberate, logical
He makes the case for how and why we do need both, but often end up using the wrong one. He notes how the first is required for efficiency, or we would spend all day deciding what socks to wear… The second, meanwhile, is required for high-stakes decisions, but is lazy by nature, and often we don’t engage it when we ought to.
Over the course of many diverse examples, Dr. Kahneman shows how again and again, the second system is slowly cogitating at the back of the class, while the first system is bouncing up and down with its hand in the air saying “I know! I know!”, even when, in fact, it does not know.
For a book largely founded in economics (it’s a massive takedown of the notion of the rational consumer), it is not at all dry, and is very readable in style. It’s engaging throughout, and readers far removed from Wall Street will find plenty of ways it relates to our everyday lives.
Bottom line: if you’d like to avoid making many mistakes in what you’d assumed to be rational decisions, this book is critical reading.
Click here to check out “Thinking, Fast And Slow”, and enjoy the results of better decisions!
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Related Posts
Hair Growth: Caffeine and Minoxidil Strategies
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Questions and Answers at 10almonds
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
This newsletter has been growing a lot lately, and so have the questions/requests, and we love that! In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
Hair growth strategies for men combing caffeine and minoxidil?
Well, the strategy for that is to use caffeine and minoxidil! Some more specific tips, though:
- Both of those things need to be massaged (gently!) into your scalp especially around your hairline.
- In the case of caffeine, that boosts hair growth. No extra thought or care needed for that one.
- In the case of minoxidil, it reboots the hair growth cycle, so if you’ve only recently started, don’t be surprised (or worried) if you see more shedding in the first three months. It’s jettisoning your old hairs because new ones were just prompted (by the minoxidil) to start growing behind them. So: it will get briefly worse before it gets better, but then it’ll stay better… provided you keep using it.
- If you’d like other options besides minoxidil, finasteride is a commonly prescribed oral drug that blocks the conversion of testosterone to DHT, which latter is what tells your hairline to recede.
- If you’d like other options besides prescription drugs, saw palmetto performs comparably to finasteride (and works the same way).
- You may also want to consider biotin supplementation if you don’t already enjoy that
- Consider also using a dermaroller on your scalp. If you’re unfamiliar, this is a device that looks like a tiny lawn aerator, with many tiny needles, and you roll it gently across your skin.
- It can be used for promoting hair growth, as well as for reducing wrinkles and (more slowly) healing scars.
- It works by breaking up the sebum that may be blocking new hair growth, and also makes the skin healthier by stimulating production of collagen and elastin (in response to the thousands of microscopic wounds that the needles make).
- Sounds drastic, but it doesn’t hurt and doesn’t leave any visible marks—the needles are that tiny. Still, practise good sterilization and ensure your skin is clean when using it.
See: How To Use A Dermaroller ← also explains more of the science of it
PS: this question was asked in the context of men, but the information goes the same for women suffering from androgenic alepoceia—which is a lot more common than most people think!
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- Both of those things need to be massaged (gently!) into your scalp especially around your hairline.
Why You Probably Need More Sleep
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Sleep: yes, you really do still need it!
We asked you how much sleep you usually get, and got the above-pictured, below-described set of responses:
- A little of a third of all respondents selected the option “< 7 hours”
- However, because respondents also selected options such as < 6 hours, < 5 hours, and < 4 hours, so if we include those in the tally, the actual total percentage of respondents who reported getting under 7 hours, is actually more like 62%, or just under two thirds of all respondents.
- Nine respondents, which was about 5% of the total, reported usually getting under 4 hours sleep
- A little over quarter of respondents reported usually getting between 7 and 8 hours sleep
- Fifteen respondents, which was a little under 10% of the total, reported usually getting between 8 and 9 hours of sleep
- Three respondents, which was a little under 2% of the total, reported getting over 9 hours of sleep
- In terms of the classic “you should get 7–9 hours sleep”, approximately a third of respondents reported getting this amount.
You need to get 7–9 hours sleep: True or False?
True! Unless you have a (rare!) mutated ADRB1 gene, which reduces that.
The way to know whether you have this, without genomic testing to know for sure, is: do you regularly get under 6.5 hours sleep, and yet continue to go through life bright-eyed and bushy-tailed? If so, you probably have that gene. If you experience daytime fatigue, brain fog, and restlessness, you probably don’t.
About that mutated ADRB1 gene:
NIH | Gene identified in people who need little sleep
Quality of sleep matters as much as duration, and a lot of studies use the “RU-Sated” framework, which assesses six key dimensions of sleep that have been consistently associated with better health outcomes. These are:
- regularity / usual hours
- satisfaction with sleep
- alertness during waking hours
- timing of sleep
- efficiency of sleep
- duration of sleep
But, that doesn’t mean that you can skimp on the last one if the others are in order. In fact, getting a good 7 hours sleep can reduce your risk of getting a cold by three or four times (compared with six or fewer hours):
Behaviorally Assessed Sleep and Susceptibility to the Common Cold
^This study was about the common cold, but you may be aware there are more serious respiratory viruses freely available, and you don’t want those, either.
Napping is good for the health: True or False?
True or False, depending on how you’re doing it!
If you’re trying to do it to sleep less in total (per polyphasic sleep scheduling), then no, this will not work in any sustainable fashion and will be ruinous to the health. We did a Mythbusting Friday special on specifically this, a while back:
Could Just Two Hours Sleep Per Day Be Enough?
PS: you might remember Betteridge’s Law of Headlines
If you’re doing it as a energy-boosting supplement to a reasonable night’s sleep, napping can indeed be beneficial to the health, and can give benefits such as:
However! There is still a right and a wrong way to go about it, and we wrote about this previously, for a Saturday Life Hacks edition of 10almonds:
How To Nap Like A Pro (No More “Sleep Hangovers”!)
As we get older, we need less sleep: True or False
False, with one small caveat.
The small caveat: children and adolescents need 9–12 hours sleep because, uncredited as it goes, they are doing some seriously impressive bodybuilding, and that is exhausting to the body. So, an adult (with a normal lifestyle, who is not a bodybuilder) will tend to need less sleep than a child/adolescent.
But, the statement “As we get older, we need less sleep” is generally taken to mean “People in the 65+ age bracket need less sleep than younger adults”, and this popular myth is based on anecdotal observational evidence: older people tend to sleep less (as our survey above shows! For any who aren’t aware, our readership is heavily weighted towards the 60+ demographic), and still continue functioning, after all.
Just because we survive something with a degree of resilience doesn’t mean it’s good for us.
In fact, there can be serious health risks from not getting enough sleep in later years, for example:
Sleep deficiency promotes Alzheimer’s disease development and progression
Want to get better sleep?
What gets measured, gets done. Sleep tracking apps can be a really good tool for getting one’s sleep on a healthier track. We compared and contrasted some popular ones:
The Head-To-Head Of Google and Apple’s Top Apps For Getting Your Head Down
Take good care of yourself!
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It Didn’t Start with You – by Mark Wolynn
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There is a trend in psychology to “blame the parents” for “childhood trauma” that can result in problems later in life. Sometimes fairly, sometimes not. This book’s mostly not about that.
It does touch on our own childhood trauma, if applicable. But mostly, it’s about epigenetic trauma inheritance. In other words, not just trauma that’s passed on in terms of “the cycle of abuse”, but trauma that’s passed on in terms of “this generation experienced trauma x, developed trauma response y, encoded it epigenetically, and passed it on to their offspring”.
So, how does one heal from a trauma one never directly experienced, and just inherited the response to it? That’s what most of this book is about, after establishing how epigenetic trauma inheritance works.
The author, a therapist, provides practical advice for how to do the things that can be done to rewrite the epigenetic code we inherited. Better late than never!
Bottom line: it is well-established that trauma is inheritable. But unlike one’s eye color or the ability to smell asparagus metabolites in urine, we can rewrite epigenetic things, to a degree. This book explains how.
Click here to check out It Didn’t Start With You, and put things to rest!
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