The Other Alzheimer’s Risk Factor
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The usually-listed 7 known risk factors of dementia (in general, not just Alzheimer’s) do not include today’s item. For a recap, those were:
The 7 Known Risk Factors For Dementia
The bonus risk factor
This idea is not completely novel; it’s been known for a while that traumatic brain injury (TBI) can increase the risk of dementia, but it has generally been chalked up to “if you damage an organ, then that organ does not function so well afterwards”.
However, in the case of Alzheimer’s, it seems there’s something deeper at play. Specifically, a study that found…
❝…traumatic brain injury alters the small vessels in the brain, resulting in an accumulation of amyloid beta—a hallmark of Alzheimer’s disease.
The findings suggest that vascular dysfunction could be an early driver in neurodegenerative disorders rather than being caused by neuronal damage.❞
This association held true even in quite young patients!
The study from Sweden looked at brain tissue from TBI patients (who had had to have brain tissue removed for medical reasons due to bleeding and swelling), and found that the (traumatic) changes to the vascular smooth muscle cells were associated with increased aggregation of amyloid-β.
In terms of establishing cause and effect: since it could be safely concluded the amyloid-β had not caused the TBI (which all had external explanations such as “car crash” or such), it can be deduced that almost* certainly the TBI caused the amyloid-β aggregation.
*because little to nothing in science is every truly certain. As in life in general, really; the difference is that scientists admit it!
You may be wondering: what was the control? It would be a very generous group of citizens indeed who would volunteer bits of their brains that hadn’t needed removing. However, the answer is that the control brain bits came from a biobank, and were from uninjured patients with no history of TBI or neurodegenerative disorders, and who had died from systemic, unrelated causes. Having been dead for a matter of hours, and the fixation time for the brain bits from the living people taking long enough that everybody’s brain bits had been out of their respective living bodies for a similar length of time, this was deemed an acceptable, if imperfect, control.
You can read the study in its entirety here; it is fascinating:
The practical take-away
The practical take-away, of course, is: look after your brain
Not just in the sense of eat fiber, get healthy fats, move more, get good sleep, stay intellectually stimulated, etc*, but also in the sense of “keep your brain physically safe”.
Now, you may think that you already try not to get into car crashes, and perhaps you do not compete in contact sports, but do be aware that one of the leading causes of TBI in older people is, ignominiously, falling down.
And if you think “that only happens to older/other people”, then be aware: there’s a first time for everything and you are not immune. With that in mind, do check out:
Fall Special! ← the seasonal title notwithstanding, this is about not falling down in the first place, and being less injurable if you do fall down
*This was a modest and vague list for brevity’s sake, so for much more detail, enjoy:
How To Reduce Your Alzheimer’s Risk ← this is rather more comprehensive
Want to know more?
Here you can read about the largest study of its kind into lifestyle factors and Alzheimer’s disease:
Alzheimer’s Causative Factors To Avoid ← the methods and conclusions of Dr. David Snowdon’s famous “Nun Study”
Take care!
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How Too Much Salt May Lead To Organ Failure
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Salt’s Health Risks… More Than Just Heart Disease!
It’s been well-established for a long time that too much salt is bad for cardiovascular health. It can lead to high blood pressure, which in turn can lead to many problems, including heart attacks.
A team of researchers has found that in addition to this, it may be damaging your organs themselves.
This is because high salt levels peel away the surfaces of blood vessels. How does this harm your organs? Because it’s through those walls that nutrients are selectively passed to where they need to be—mostly your organs. So, too much salt can indirectly starve your organs of the nutrients they need to survive. And you absolutely do not want your organs to fail!
❝We’ve identified new biomarkers for diagnosing blood vessel damage, identifying patients at risk of heart attack and stroke, and developing new drug targets for therapy for a range of blood vessel diseases, including heart, kidney and lung diseases as well as dementia❞
~ Newman Sze, Canada Research Chair in Mechanisms of Health and Disease, and lead researcher on this study.
See the evidence for yourself: Endothelial Damage Arising From High Salt Hypertension Is Elucidated by Vascular Bed Systematic Profiling
Diets high in salt are a huge problem in Canada, North America as a whole, and around the world. According to a World Health Organization (WHO) report released March 9, Canadians consume 9.1 grams of salt per day.
Read: WHO global report on sodium intake reduction
You may be wondering: who is eating over 9g of salt per day?
And the answer is: mostly, people who don’t notice how much salt is already in processed foods… don’t see it, and don’t think about it.
Meanwhile, the WHO recommends the average person to consume no more than five grams, or one teaspoon, of salt per day.
Read more: Massive efforts needed to reduce salt intake and protect lives
The American Heart Association, tasked with improving public health with respect to the #1 killer of Americans (it’s also the #1 killer worldwide—but that’s not the AHA’s problem), goes further! It recommends no more than 2.3g per day, and ideally, no more than 1.5g per day.
Some handy rules-of-thumb
Here are sodium-related terms you may see on food packages:
- Salt/Sodium-Free = Less than 5mg of sodium per serving
- Very Low Sodium = 35mg or less per serving
- Low Sodium = 140mg or less per serving
- Reduced Sodium = At least 25% less sodium per serving than the usual sodium level
- Light in Sodium or Lightly Salted = At least 50% less sodium than the regular product
Confused by milligrams? Instead of remembering how many places to move the decimal point (and potentially getting an “out by an order of magnitude error—we’ve all been there!), think of the 1.5g total allowance as being 1500mg.
See also: How much sodium should I eat per day? ← from the American Heart Association
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The Philosophy Gym – by Dr. Stephen Law
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If you’d like to give those “little gray cells” an extra workout, this book is a great starting place.
Dr. Stephen Law is Director of Philosophy at the Department of Continuing Education, University of Oxford. As such, he’s no stranger to providing education that’s both attainable and yet challenging. Here, he lays out important philosophical questions, and challenges the reader to get to grips with them in a systematic fashion.
Each of the 25 questions/problems has a chapter devoted to it, and is ranked:
- Warm-up
- Moderate
- More Challenging
But, he doesn’t leave us to our own devices, nor does he do like a caricature of a philosopher and ask us endless rhetorical questions. Instead, he looks at various approaches taken by other philosophers over time, and invites the reader to try out those methods.
The real gain of this book is not the mere enjoyment of reading, but rather in taking those thinking skills and applying them in life… because most if not all of them do have real-world applications and/or implications too.
The book’s strongest point? That it doesn’t assume prior knowledge (and yet also doesn’t patronize the reader). Philosophy can be difficult to dip one’s toes into without a guide, because philosophers writing about philosophy can at first be like finding yourself at a party where you know nobody, but they all know each other.
In contrast, Law excels at giving quick, to-the-point ground-up summaries of key ideas and their progenitors.
In short: a wonderful way to get your brain doing things it might not have tried before!
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Steps vs Cardio | Which is Best for Fat Loss, Health, & Performance?
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“Move more”, they say; but does it matter how quickly?
Use it or lose it
For general performance:
- More steps per day do offer slight aerobic benefits but do not significantly improve endurance.
- Higher-intensity cardio (ideally, HIIT) is essential for improving aerobic fitness.
- Training should match endurance goals (e.g. long-distance running vs team sports vs whatever it is that you care about for you).
For general health:
- Both cardio and step tracking reduce mortality risk and improve longevity.
- 2–3 hours of cardio per week provides most health benefits, with diminishing returns after 8 hours per week.
- 10,000+ steps/day is optimal, but 5,000+ steps/day still benefits health. And, not mentioned in this video, but really (per science) there seem to be diminishing returns after about 8,000 steps per day.
Fun fact: the reason it’s 10,000 steps per day that everyone talks about as the default goal, is just because the Japanese person who popularized it noted that the kanji for 10,000 looks a bit like a walking person: 万
For fat loss:
- Both step tracking and cardio do help.
- Step tracking better reflects total daily movement, while cardio burns calories in sessions—but if it’s not HIIT, there is likely to be a compensatory metabolic slump afterwards.
- High-intensity cardio increases fatigue, which may impact resistance training and diet adherence.
- Excessive endurance training can slightly inhibit muscle growth, but low-intensity steps have minimal interference.
So for fat loss, it’s best to get those steps in, and throw in a few HIIT sessions per week, with adequate recovery time between them.
For more on all of these things, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
How To Do HIIT (Without Wrecking Your Body)
Take care!
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Brain Food? The Eyes Have It!
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Brain Food? The Eyes Have It!
This is Dr. Michael Greger, M.D. FACLM, of “Dr. Greger’s Daily Dozen” and “How Not To Die” fame, and he wants us to protect our brains (and while we’re at it, our eyesight).
And the secret is…
Lutein.
This is a carotenoid, which is super important for the eyes and brain. Not to be confused with carrots, which despite the name are usually not a good source of carotenoids!
They do however contain lots of beta-carotene, a form of vitamin A, but that (and the famous WW2-era myth born of deliberate disinformation by the British government) isn’t what we’re covering today.
We say “eyes and brain” but really, the eyes are just an extension of the brain in any case.
Pedantry aside, what Dr. Greger wants you to know about lutein is how important it is for the protection of your brain/eyes, both against cognitive decline and against age-related macular degeneration (the most common cause of eyesight loss in old age).
Important take-away info:
- Two things that hasten brain aging are inflammation and oxidative stress. Antioxidant and anti-inflammatory foods mitigate those.
- Researchers investigated eight different dietary antioxidants, including vitamins A and E. Only lutein was “significantly related to better cognition”.
- The macula in the middle of our retina is packed with lutein, and levels in the retina correspond to levels in the rest of our brain.
- Alzheimer’s patients have significantly less lutein in their eyes and in their blood, and a higher occurrence of macular degeneration.
- Dark green leafy vegetables are lutein superstars. A half cup of kale has 50 times more lutein than an egg.
Want to know more about the Dr. Greger’s Daily Dozen approach to health?
See the Website / Get the App (Android & iOS) / Get the Science Book / Get the Cookbook!
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Oral retinoids can harm unborn babies. But many women taking them for acne may not be using contraception
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Oral retinoids are a type of medicine used to treat severe acne. They’re sold under the brand name Roaccutane, among others.
While oral retinoids are very effective, they can have harmful effects if taken during pregnancy. These medicines can cause miscarriages and major congenital abnormalities (harm to unborn babies) including in the brain, heart and face. At least 30% of children exposed to oral retinoids in pregnancy have severe congenital abnormalities.
Neurodevelopmental problems (in learning, reading, social skills, memory and attention) are also common.
Because of these risks, the Australasian College of Dermatologists advises oral retinoids should not be prescribed a month before or during pregnancy under any circumstances. Dermatologists are instructed to make sure a woman isn’t pregnant before starting this treatment, and discuss the risks with women of childbearing age.
But despite this, and warnings on the medicines’ packaging, pregnancies exposed to oral retinoids continue to be reported in Australia and around the world.
In a study published this month, we wanted to find out what proportion of Australian women of reproductive age were taking oral retinoids, and how many of these women were using contraception.
Our results suggest a high proportion of women are not using effective contraception while on these drugs, indicating Australia needs a strategy to reduce the risk oral retinoids pose to unborn babies.
Contraception options
Using birth control to avoid pregnancy during oral retinoid treatment is essential for women who are sexually active. Some contraception methods, however, are more reliable than others.
Long-acting-reversible contraceptives include intrauterine devices (IUDs) inserted into the womb (such as Mirena, Kyleena, or copper devices) and implants under the skin (such as Implanon). These “set and forget” methods are more than 99% effective.
Oral retinoids taken during pregnancy can cause complications in babies. Gorodenkoff/Shutterstock The effectiveness of oral contraceptive pills among “perfect” users (following the directions, with no missed or late pills) is similarly more than 99%. But in typical users, this can fall as low as 91%.
Condoms, when used as the sole method of contraception, have higher failure rates. Their effectiveness can be as low as 82% in typical users.
Oral retinoid use over time
For our study, we analysed medicine dispensing data among women aged 15–44 from Australia’s Pharmaceutical Benefit Scheme (PBS) between 2013 and 2021.
We found the dispensing rate for oral retinoids doubled from one in every 71 women in 2013, to one in every 36 in 2021. The increase occurred across all ages but was most notable in young women.
Most women were not dispensed contraception at the same time they were using the oral retinoids. To be sure we weren’t missing any contraception that was supplied before the oral retinoids, we looked back in the data. For example, for an IUD that lasts five years, we looked back five years before the oral retinoid prescription.
Our analysis showed only one in four women provided oral retinoids were dispensed contraception simultaneously. This was even lower for 15- to 19-year-olds, where only about one in eight women who filled a prescription for oral retinoids were dispensed contraception.
A recent study found 43% of Australian year 10 and 69% of year 12 students are sexually active, so we can’t assume this younger age group largely had no need for contraception.
One limitation of our study is that it may underestimate contraception coverage, because not all contraceptive options are listed on the PBS. Those options not listed include male and female sterilisation, contraceptive rings, condoms, copper IUDs, and certain oral contraceptive pills.
But even if we presume some of the women in our study were using forms of contraception not listed on the PBS, we’re still left with a significant portion without evidence of contraception.
What are the solutions?
Other countries such as the United States and countries in Europe have pregnancy prevention programs for women taking oral retinoids. These programs include contraception requirements, risk acknowledgement forms and regular pregnancy tests. Despite these programs, unintended pregnancies among women using oral retinoids still occur in these countries.
But Australia has no official strategy for preventing pregnancies exposed to oral retinoids. Currently oral retinoids are prescribed by dermatologists, and most contraception is prescribed by GPs. Women therefore need to see two different doctors, which adds costs and burden.
Preventing pregnancy during oral retinoid treatment is essential. Krakenimages.com/Shutterstock Rather than a single fix, there are likely to be multiple solutions to this problem. Some dermatologists may not feel confident discussing sex or contraception with patients, so educating dermatologists about contraception is important. Education for women is equally important.
A clinical pathway is needed for reproductive-aged women to obtain both oral retinoids and effective contraception. Options may include GPs prescribing both medications, or dermatologists only prescribing oral retinoids when there’s a contraception plan already in place.
Some women may initially not be sexually active, but change their sexual behaviour while taking oral retinoids, so constant reminders and education are likely to be required.
Further, contraception access needs to be improved in Australia. Teenagers and young women in particular face barriers to accessing contraception, including costs, stigma and lack of knowledge.
Many doctors and women are doing the right thing. But every woman should have an effective contraception plan in place well before starting oral retinoids. Only if this happens can we reduce unintended pregnancies among women taking these medicines, and thereby reduce the risk of harm to unborn babies.
Dr Laura Gerhardy from NSW Health contributed to this article.
Antonia Shand, Research Fellow, Obstetrician, University of Sydney and Natasha Nassar, Professor of Paediatric and Perinatal Epidemiology and Chair in Translational Childhood Medicine, University of Sydney
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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How To Stay In Shape At 70
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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
I have a question: what are the pros and cons of older people (60+) taking creatine every day?
It depends what else you’re doing, as creatine mostly helps the muscles recover after exercise. So:
- iff you’re doing resistance training (such as weights or bodyweight training), or HIIT (High Intensity Interval Training), then creatine monohydrate may help you keep at that and keep doing well.
- if you’re just doing light-to-moderate exercises, you might not get much benefit from creatine!
The topic merits diving deeper though, so we’ll queue that for one of our “Research Review Monday” days!
I wanted to ask if you think marine collagen is decent to take. I’ve heard a lot of bad press about it
We don’t know what you’ve heard, but generally speaking it’s been found to be very beneficial to bones, joints, and skin! We wrote about it quite recently on a “Research Review Monday”:
See: We Are Such Stuff As Fish Are Made Of
Natural alternatives to medication for depression?
Great question! We did a mean feature a while back, but we definitely have much more to say! We’ll do another main feature soon, but in the meantime, here’s what we previously wrote:
See: The Mental Health First-Aid That You’ll Hopefully Never Need
^This covers not just the obvious, but also why the most common advice is not helpful, and practical tips to actually make manageable steps back to wellness, on days when “literally just survive the day” is one’s default goal.
I am now in the “aging” population. A great concern for me is Alzheimers. My father had it and I am so worried. What is the latest research on prevention?
One good thing to note is that while Alzheimer’s has a genetic component, it doesn’t appear to be hereditary per se. Still, good to be on top of these things, and it’s never too early to start with preventive measures!
You might like a main feature we did on this recently:
See: How To Reduce Your Alzheimer’s Risk
Side effects of statins, are they worth it? Depression, are antidepressants worth it?
About statins, that depends a lot on you, your circumstances, and—as it happens—your gender. We covered this in a main feature recently, but a short answer is: for most people, they may not be the best first choice, and could even make things worse. For some people, however, they really are just what’s needed.
- Factors that make them more likely better for you: being a man, or having atherosclerosis
- Factors that make them more likely worse for you: being a woman in general
Check out the main feature we did: Statins: His & Hers?
As for antidepressants? That depends a lot on you, your physiology, your depression, your circumstances, and more. We’ll definitely do a main feature on that sometime soon, as there’s a lot that most people don’t know!
I am interested in the following: Aging, Exercise, Diet, Relationships, Purpose, Lowering Stress
You’re going to love our Psychology Sunday editions of 10almonds!
You may particularly like some of these:
- Seriously Useful Communication Skills! ← this is about relationship stuff
- Lower Your Cortisol! (Here’s Why & How) ← about “the stress hormone”
- How To Set Your Anxiety Aside ← these methods work for stress too
(This coming Psychology Sunday will have a feature specifically on stress, so do make sure to read that when it comes out!)
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!
How to get to sleep at night as fast and as naturally as possible? Thank you!
We’ll definitely write more on that! You might like these articles we wrote already, meanwhile:
- Beating The Insomnia Blues ← this one is general advice and tips
- Time For Some Pillow Talk ← this one compares and reviews some popular sleep apps
- Insomnia? High Blood Pressure? Try these! ← this one tackles the matter from a dietary angle
Q: How to be your best self after 60: Self motivation / Avoiding or limiting salt, sugar & alcohol: Alternatives / Ways to sneak in more movements/exercise
…and, from a different subscriber…
Q: Inflammation & over 60 weight loss. Thanks!
Here are some of our greatest hits on those topics:
- Where Nutrition Meets Habits ← focusing on food that’s all three of: healthy + easy + cheap
- How To Keep On Keeping On ← exercise tips for when the motivation wanes
- Keep Inflammation At Bay ← science-based tips and advice
Also, while we’ve recommended a couple of books on stopping (or reducing) drinking, we’ve not done a main feature on that, so we definitely will one of these days!
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