Under Pressure: A Guide To Controlling High Blood Pressure – by Dr. Frita Fisher
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Hypertension kills a lot of people, and does so with little warning—it can be asymptomatic before it gets severe enough to cause harm, and once it causes harm, well, one heart attack or stroke is already one too many.
Aimed more squarely at people in the 35–45 danger zone (young enough to not be getting regular blood pressure checks, old enough that it may have been building up for decades), this is a very good primer on blood pressure, factors affecting it, what goes wrong, what to do about it, and how to make a good strategy for managing it for life.
The style is easy-reading, making this short (91 pages) book a very quick read, but an informative one.
Bottom line: if you are already quite knowledgeable about blood pressure and blood pressure management, this one’s probably not for you. But if you’re in the category of “what do those numbers mean again?”, then this is a very handy book to have, to get you up to speed so that you can handle things as appropriate.
Click here to check out Under Pressure, and get/keep yours under control!
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The Immunostimulant Superfood –
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First, what this book is not: a “detox cleanse” book of the kind that claims you can flush out the autism if you just eat enough celery.
What it rather is: an overview brain chemistry, gut microbiota, and the very many other bodily systems that interact with these “two brains”.
She also does some mythbusting of popular misconceptions (for example with regard to tryptophan), and explains with good science just what exactly such substances as gluten and casein can and can’t do.
The format is less of a textbook and more a multipart (i.e., chapter-by-chapter) lecture, in pop-science style though, making it very readable. There are a lot of practical advices too, and options to look up foods by effect, and what to eat for/against assorted mental states.
Bottom line: anyone who eats food is, effectively, drugging themselves in one fashion or another—so you might as well make a conscious choice about how to do so.
Click here to check out This Is Your Brain On Food, and choose what kind of day you have!
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Ice Baths: To Dip Or Not To Dip?
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Many Are Cold, But Few Are Frozen
We asked you for your (health-related) view of ice baths, and got the above-depicted, below-described, set of responses:
- About 31% said “ice baths are great for the health; we should take them”
- About 29% said “ice baths’ risks outweigh their few benefits”
- About 26% said “ice baths’ benefits outweigh their few risks”
- About 14% said “ice baths are dangerous and can kill you; best avoided”
So what does the science say?
Freezing water is very dangerous: True or False?
True! Water close to freezing point is indeed very dangerous, and can most certainly kill you.
Fun fact, though: many such people are still saveable with timely medical intervention, in part because the same hypothermia that is killing them also slows down the process* of death
Source (and science) for both parts of that:
Cold water immersion: sudden death and prolonged survival
*and biologically speaking, death is a process, not an event, by the way. But we don’t have room for that today!
(unless you die in some sudden violent way, such as a powerful explosion that destroys your brain instantly; then it’s an event)
Ice baths are thus also very dangerous: True or False?
False! Assuming that they are undertaken responsibly and you have no chronic diseases that make it more dangerous for you.
What does “undertaken responsibly” mean?
Firstly, the temperature should not be near freezing. It should be 10–15℃, which for Americans is 50–59℉.
You can get a bath thermometer to check this, by the way. Here’s an example product on Amazon.
Secondly, your ice bath should last no more than 10–15 minutes. This is not a place to go to sleep.
What chronic diseases would make it dangerous?
Do check with your doctor if you have any doubts, as no list we make can be exhaustive and we don’t know your personal medical history, but the main culprits are:
- Cardiovascular disease
- Hypertension
- Diabetes (any type)
The first two are for heart attack risk; the latter is because diabetes can affect core temperature regulation.
Ice baths are good for the heart: True or False?
True or False depending on how they’re done, and your health before starting.
For most people, undertaking ice baths responsibly, repeated ice bath use causes the cardiovascular system to adapt to better maintain homeostasis when subjected to thermal shock (i.e. sudden rapid changes in temperature).
For example: Respiratory and cardiovascular responses to cold stress following repeated cold water immersion
And because that was a small study, here’s a big research review with a lot of data; just scroll to where it has the heading“Specific thermoregulative adaptations to regular exposure to cold air and/or cold water exposure“ for many examples and much discussion:
Health effects of voluntary exposure to cold water: a continuing subject of debate
Ice baths are good against inflammation: True or False?
True! Here’s one example:
Uric acid and glutathione levels (important markers of chronic inflammation) are also significantly affected:
Uric acid and glutathione levels during short-term whole body cold exposure
Want to know more?
That’s all we have room for today, but check out our previous “Expert Insights” main feature looking at Wim Hof’s work in cryotherapy:
A Cold Shower A Day Keeps The Doctor Away?
Enjoy!
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Behind Book Recommendations
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It’s Q&A Day!
Each Thursday, we respond to subscriber questions and requests! If it’s something small, we’ll answer it directly; if it’s something bigger, we’ll do a main feature in a follow-up day instead!
So, no question/request to big or small; they’ll just get sorted accordingly
Remember, you can always hit reply to any of our emails, or use the handy feedback widget at the bottom. We always look forward to hearing from you!
Q: What’s the process behind the books you recommend? You seem to have a limitless stream of recommendations
We do our best!
The books we recommend are books that…
- are on Amazon—it makes things tidy, consistent, and accessible. And if you end up buying one of the books, we get a small affiliate commission*.
- we have read—we would say “obviously”, but you might be surprised how many people write about books without having read them.
- pertain in at least large part to health and/or productivity.
- are written by humans—bookish people (and especially Kindle Unlimited users) may have noticed lately that there are a lot of low quality AI-written books flooding the market, sometimes with paid 5-star reviews to bolster them. It’s frustrating, but we can tell the difference and screen those out.
- are of a certain level of quality. They don’t have to be “top 5 desert-island books”, because well, there’s one every day and the days keep coming. But they do have to genuinely deliver the value that we describe, and merit a sincere recommendation.
- are varied—we try to not give a run of “samey” books one after another. We will sometimes review a book that covers a topic another previously-reviewed book did, but it must have something about it that makes it different. It may be a different angle or a different writing style, but it needs something to set it apart.
*this is from Amazon and isn’t product-specific, so this is not affecting our choice of what books to review at all—just that they will be books that are available on Amazon.
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Do you have knee pain from osteoarthritis? You might not need surgery. Here’s what to try instead
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Most people with knee osteoarthritis can control their pain and improve their mobility without surgery, according to updated treatment guidelines from the Australian Commission on Safety and Quality in Health Care.
So what is knee osteoarthritis and what are the best ways to manage it?
Pexels/Kindelmedia More than 2 million Australians have osteoarthritis
Osteoarthritis is the most common joint disease, affecting 2.1 million Australians. It costs the economy A$4.3 billion each year.
Osteoarthritis commonly affects the knees, but can also affect the hips, spine, hands and feet. It impacts the whole joint including bone, cartilage, ligaments and muscles.
Most people with osteoarthritis have persistent pain and find it difficult to perform simple daily tasks, such as walking and climbing stairs.
Is it caused by ‘wear and tear’?
Knee osteoarthritis is most likely to affect older people, those who are overweight or obese, and those with previous knee injuries. But contrary to popular belief, knee osteoarthritis is not caused by “wear and tear”.
Research shows the degree of structural wear and tear visible in the knee joint on an X-ray does not correlate with the level of pain or disability a person experiences. Some people have a low degree of structural wear and tear and very bad symptoms, while others have a high degree of structural wear and tear and minimal symptoms. So X-rays are not required to diagnose knee osteoarthritis or guide treatment decisions.
Telling people they have wear and tear can make them worried about their condition and afraid of damaging their joint. It can also encourage them to try invasive and potentially unnecessary treatments such as surgery. We have shown this in people with osteoarthritis, and other common pain conditions such as back and shoulder pain.
This has led to a global call for a change in the way we think and communicate about osteoarthritis.
What’s the best way to manage osteoarthritis?
Non-surgical treatments work well for most people with osteoarthritis, regardless of their age or the severity of their symptoms. These include education and self-management, exercise and physical activity, weight management and nutrition, and certain pain medicines.
Education is important to dispel misconceptions about knee osteoarthritis. This includes information about what osteoarthritis is, how it is diagnosed, its prognosis, and the most effective ways to self-manage symptoms.
Health professionals who use positive and reassuring language can improve people’s knowledge and beliefs about osteoarthritis and its management.
Many people believe that exercise and physical activity will cause further damage to their joint. But it’s safe and can reduce pain and disability. Exercise has fewer side effects than commonly used pain medicines such as paracetamol and anti-inflammatories and can prevent or delay the need for joint replacement surgery in the future.
Many types of exercise are effective for knee osteoarthritis, such as strength training, aerobic exercises like walking or cycling, Yoga and Tai chi. So you can do whatever type of exercise best suits you.
Increasing general physical activity is also important, such as taking more steps throughout the day and reducing sedentary time.
Weight management is important for those who are overweight or obese. Weight loss can reduce knee pain and disability, particularly when combined with exercise. Losing as little as 5–10% of your body weight can be beneficial.
Pain medicines should not replace treatments such as exercise and weight management but can be used alongside these treatments to help manage pain. Recommended medicines include paracetamol and non-steroidal anti-inflammatory drugs.
Opioids are not recommended. The risk of harm outweighs any potential benefits.
What about surgery?
People with knee osteoarthritis commonly undergo two types of surgery: knee arthroscopy and knee replacement.
Knee arthroscopy is a type of keyhole surgery used to remove or repair damaged pieces of bone or cartilage that are thought to cause pain.
However, high-quality research has shown arthroscopy is not effective. Arthroscopy should therefore not be used in the management of knee osteoarthritis.
Joint replacement involves replacing the joint surfaces with artificial parts. In 2021–22, 53,500 Australians had a knee replacement for their osteoarthritis.
Joint replacement is often seen as being inevitable and “necessary”. But most people can effectively manage their symptoms through exercise, physical activity and weight management.
The new guidelines (known as “care standard”) recommend joint replacement surgery only be considered for those with severe symptoms who have already tried non-surgical treatments.
I have knee osteoarthritis. What should I do?
The care standard links to free evidence-based resources to support people with osteoarthritis. These include:
- education, such as a decision aid and four-week online course
- self-directed online exercise and yoga programs
- weight management support
- pain management strategies, such as MyJointPain and painTRAINER.
If you have osteoarthritis, you can use the care standard to inform discussions with your health-care provider, and to make informed decisions about your care.
Belinda Lawford, Postdoctoral research fellow in physiotherapy, The University of Melbourne; Giovanni E. Ferreira, NHMRC Emerging Leader Research Fellow, Institute of Musculoskeletal Health, University of Sydney; Joshua Zadro, NHMRC Emerging Leader Research Fellow, Sydney Musculoskeletal Health, University of Sydney, and Rana Hinman, Professor in Physiotherapy, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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How To Get More Nutrition From The Same Food
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How To Get More Out Of What’s On Your Plate
Where does digestion begin? It’s not the stomach. It’s not even the mouth.
It’s when we see and smell our food; maybe even hear it! “Sell the sizzle, not the steak” has a biological underpinning.
At that point, when we begin to salivate, that’s just one of many ways that our body is preparing itself for what we’re about to receive.
When we grab some ready-meal and wolf it down, we undercut that process. In the case of ready-meals, they often didn’t have much nutritional value, but even the most nutritious food isn’t going to do us nearly as much good if it barely touches the sides on the way down.
We’re not kidding about the importance of that initial stage of our external senses, by the way:
- Food perception primes hepatic endoplasmic reticulum homeostasis via melanocortin-dependent control of mTOR activation
- Olfaction regulates organismal proteostasis and longevity via microRNA-dependent signalling
So, mindful eating is not just something for Instagrammable “what I eat in a day” aesthetic photos, nor is just for monks atop cold mountains. There is actual science here, and a lot of it.
It starts with ingredients
“Eating the rainbow” (no, Skittles do not count) is great health advice for getting a wide variety of micronutrients, but it’s also simply beneficial for our senses, too. Which, as above-linked, makes a difference to digestion and nutrient absorption.
Enough is enough
That phrase always sounds like an expression of frustration, “Enough is enough!”. But, really:
Don’t overcomplicate your cooking, especially if you’re new to this approach. You can add in more complexities later, but for now, figure out what will be “enough”, and let it be enough.
The kitchen flow
Here we’re talking about flow in the Csikszentmihalyi sense of the word. Get “into the swing of things” and enjoy your time in the kitchen. Schedule more time than you need, and take it casually. Listen to your favourite music. Dance while you cook. Taste things as you go.
There are benefits, by the way, not just to our digestion (in being thusly primed and prepared for eating), but also to our cognition:
In The Zone: Flow State and Cognition in Older Adults
Serve
No, not just “put the food on the table”, but serve.
Have a pleasant environment; with sensory pleasures but without too many sensory distractions. Think less “the news on in the background” and more smooth jazz or Mozart or whatever works for you. Use your favourite (small!) plates/bowls, silverware, glasses. Have a candle if you like (unscented!).
Pay attention to presentation on the plate / in the bowl / in any “serve yourself” serving-things. Use a garnish (parsley is great if you want to add a touch of greenery without changing the flavor much). Crack that black pepper at the table. Make any condiments count (less “ketchup bottle” and more “elegant dip”).
Take your time
Say grace if that fits with your religious traditions, and/or take a moment to reflect on gratitude.
In many languages there’s a pre-dinner blessing that most often translates to “good appetite”. This writer is fond of the Norwegian “Velbekommen”, and it means more like “May good come of it for you”, or “May it do you good”.
Then, enjoy the food.
For the most even of blood sugar levels, consider eating fiber, protein/fat, carbs, in that order.
Why? See: 10 Ways To Balance Blood Sugars
Chew adequately and mindfully. Put your fork (or spoon, or chopsticks, or whatever) down between bites. Drink water alongside your meal.
Try to take at least 20 minutes to enjoy your meal, and/but any time you go to reach for another helping, take a moment to check in with yourself with regard to whether you are actually still hungry. If you’re not, and are just eating for pleasure, consider deferring that pleasure by saving the food for later.
At this point, people with partners/family may be thinking “But it won’t be there later! Someone else will eat it!”, and… That’s fine! Be happy for them. You can cook again tomorrow. You prepared delicious wholesome food that your partner/family enjoyed, and that’s always a good thing.
Want to know more about the science of mindful eating?
Check out Harvard’s Dr. Lilian Cheung on Mindful Eating here!
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Castor Oil: All-Purpose Life-Changer, Or Snake Oil?
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As “trending” health products go, castor oil is enjoying a lot of popularity presently, lauded as a life-changing miracle-worker, and social media is abuzz with advice to put it everywhere from your eyes to your vagina.
But:
- what things does science actually say it’s good for,
- what things lack evidence, and
- what things go into the category of “wow definitely do not do that”?
We don’t have the space to go into all of its proposed uses (there are simply far too many), but we’ll examine some common ones:
To heal/improve the skin barrier
Like most oils, it’s functional as a moisturizer. In particular, its high (90%!) ricinoleic fatty acid content does indeed make it good at that, and furthermore, has properties that can help reduce skin inflammation and promote wound healing:
Bioactive polymeric formulations for wound healing ← there isn’t a conveniently quotable summary we can just grab here, but you can see the data and results, from which we can conclude:
- formulations with ricinoleic acid (such as with castor oil) performed very well for topical anti-inflammatory purposes
- they avoided the unwanted side effects associated with some other contenders
- they consistently beat other preparations in the category of wound-healing
To support hair growth and scalp health
There is no evidence that it helps. We’d love to provide a citation for this, but it’s simply not there. There’s also no evidence that it doesn’t help. For whatever reason, despite its popularity, peer-reviewed science has simply not been done for this, or if it has, it wasn’t anywhere publicly accessible.
It’s possible that if a person is suffering hair loss specifically as a result of prostaglandin D2 levels, that ricinoleic acid will inhibit the PGD2, reversing the hair loss, but even this is hypothetical so far, as the science is currently only at the step before that:
However, due to some interesting chemistry, the combination of castor oil and warm water can result in acute (and irreversible) hair felting, in other words, the strands of hair suddenly glue together to become one mass which then has to be cut off:
“Castor Oil” – The Culprit of Acute Hair Felting
👆 this is a case study, which is generally considered a low standard of evidence (compared to high-quality Randomized Controlled Trials as the highest standard of evidence), but let’s just say, this writer (hi, it’s me) isn’t risking her butt-length hair on the off-chance, and doesn’t advise you to, either. There are other hair-oils out there; argan oil is great, coconut oil is totally fine too.
As a laxative
This time, there’s a lot of evidence, and it’s even approved for this purpose by the FDA, but it can be a bit too good, insofar as taking too much can result in diarrhea and uncomfortable cramping (the cramps are a feature not a bug; the mechanism of action is stimulatory, i.e. it gets the intestines squeezing, but again, it can result in doing that too much for comfort):
Castor Oil: FDA-Approved Indications
To soothe dry eyes
While putting oil in your eyes may seem dubious, this is another one where it actually works:
❝Castor oil is deemed safe and tolerable, with strong anti-microbial, anti-inflammatory, anti-nociceptive, analgesic, antioxidant, wound healing and vasoconstrictive properties.
These can supplement deficient physiological tear film lipids, enabling enhanced lipid spreading characteristics and reducing aqueous tear evaporation.
Studies reveal that castor oil applied topically to the ocular surface has a prolonged residence time, facilitating increased tear film lipid layer thickness, stability, improved ocular surface staining and symptoms.❞
Source: Therapeutic potential of castor oil in managing blepharitis, meibomian gland dysfunction and dry eye
Against candidiasis (thrush)
We couldn’t find science for (or against) castor oil’s use against vaginal candidiasis, but here’s a study that investigated its use against oral candidiasis:
…in which castor oil was the only preparation that didn’t work against the yeast.
Summary
We left a lot unsaid today (so many proposed uses, it feels like a shame to skip them), but in few words: it’s good for skin (including wound healing) and eyes; but we’d give it a miss for hair, candidiasis, and digestive disorders.
Want to try some?
We don’t sell it, but here for your convenience is an example product on Amazon 😎
Take care!
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