Dentists Debunk 15 Teeth Myths
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Dentists Dr. John Yoo and Dr. Jason Lin leave no gaps in the truth:
The tooth, the whole tooth, and nothing but the tooth
Not only is there no tooth fairy (we are shocked), but also…
- “Baby teeth aren’t important.”
False! Baby teeth act as space holders for permanent teeth, affect speech development, and influence a child’s psychological well-being. - “Acidic fruits will whiten your smile.”
False! In any practical sense, anyway: acidic fruits may temporarily make teeth appear whiter by dispersing stains but cause enamel erosion and weaken teeth over time. - “Fillings last forever.”
False! Fillings can wear down, fail, or develop cavities underneath if oral hygiene isn’t maintained, requiring replacement over time. - “Cavities are irreversible.”
False! Cavities in the enamel can be reversed with fluoride and good oral hygiene, but cavities that reach the dentin are typically irreversible. - “Braces are just for crooked teeth.”
False! Braces also correct functional issues like overbites, underbites, crossbites, and prevent future complications like tooth impaction. - “A knocked-out tooth is gone for good.”
False! A knocked-out tooth can be reimplanted if done quickly (ideally within an hour); storing it in whole milk or saliva helps preserve it. - “Diet sodas won’t give you cavities.”
False! Diet sodas can still cause cavities due to their acidic pH, which erodes enamel, even without sugar. - “Dental cleanings aren’t necessary.”
False! Dental cleanings help remove plaque and tartar that regular brushing can’t, and allow for regular oral health checkups. - “Retainers aren’t for life.”
False! To maintain teeth alignment after braces, retainers should be worn long-term as teeth can shift even years later. - “You should floss before brushing.”
False! The order doesn’t matter, but do floss regularly. - “Everyone has wisdom teeth.”
False! Not everyone is born with wisdom teeth; they are the most commonly missing teeth, and not everyone needs them removed. - “Hydrogen peroxide and baking soda are good toothpaste replacements.”
False! While they are common components in toothpaste, they lack fluoride, which is essential for remineralizing and protecting enamel. - “You’re too old to get braces.”
False! There’s no age limit for braces or aligners; adults often seek them for both aesthetic and functional reasons. - “Teeth that have had root canals can’t feel.”
False! Teeth with root canals can’t feel pain from nerves, but you can still sense pressure due to surrounding ligaments. - “You’ll inevitably lose all your teeth when you’re old.”
False! Good oral hygiene and regular dental care can preserve natural teeth into old age, though genetics also play a role.
For more on each of these, enjoy:
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The Dangers Of Fires, Floods, & Having Your Hair Washed
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It’s a dangerous business, going out of your door… And this week’s news round-up looks at 5 reasons why that might be:
Superspreading like wildfire
Environmental health risks are a big topic these days, with our changing climate. As for wildfires? Some of the risks are obvious: burning to death or choking to death in the smoke—but even upon surviving the seemingly worst, more threats remain that themselves can still kill.
Those threats include that both burns and smoke inhalation can cause acute and chronic changes in the immune system. Specifically: changes for the worse. The mechanisms by which this happens depend on the nature of any burns received, and in the case of smoke, what exactly was in the smoke. Now, there is no kind of smoke that is healthy to inhale, but definitely some kinds are a lot worse than others, and let’s just say, people’s homes contain a lot of plastic.
Additionally, if you think someone coughing near you spreads germs, imagine how far germs can be spread by miles-high, miles-wide billowing hot air.
In short, there’s a lot going on and none of it is good, and we’ve barely had room to summarise here, so…
Read in full: Wildfires ignite infection risks by weakening the body’s immune defenses and spreading bugs in smoke
Related: What’s Lurking In Your Household Air?
A flood of diseases
*record scratch*
Environmental health risks are a big topic these days, with our changing climate. As for floods? Some of the risks are obvious: drowning to death or having your house washed away—but even upon surviving the seemingly worst, more threats remain that themselves can still kill.
Those threats include increases in deaths from infectious and parasitic diseases, and respiratory diseases in general. Simply, a place that has been waterlogged, even if it seems “safe” now, is not a healthy place to be, due to bacteria, viruses, fungi, and more. In fact, it even increases all-cause mortality, because being healthy in such a place is simply harder:
Read in full: Linked to higher mortality rates, large floods emerge as an urgent public health concern
Related: Dodging Dengue In The US
Don’t lose your head
Visiting the hairdresser is not something that most people consider a potential brush with death—your hairdresser is probably not Sweeney Todd, after all. However…
There is an issue specifically with getting your hair washed there. Backwash basins—the sink things into which one rests one’s head at a backwards tilt—create an awkward angle for the cervical vertebrae and a sudden reduction in blood flow to the brain can cause a stroke, with the risk being sufficiently notable as to have its own name in scientific literature: beauty parlor stroke syndrome (BPSS).
❝While research suggests BPSS is most likely to occur in women over 50—and previous history of narrowing or thinning of blood vessels and arthritis of the spinal column in the neck are particular risk factors—it could happen to anyone regardless of age or medical history.❞
Read in full: The hidden health risk of having your hair washed
Related: Your Stroke Survival Plan
The smartwatch wristbands that give you cancer
It’s about the PFAS content. The article doesn’t discuss cancer in detail, just mentioning the increased risk, but you can read about the link between the two in our article below.
Basically, if your smartwatch wristband is a) not silicone and b) waterproof anyway, especially if it’s stain-resistant (as most are designed to be, what with wearing it next to one’s skin all the time while exercising, and not being the sort of thing one throws in the wash), then chances are it has PFAS levels much higher than normally found in consumer goods or clothing.
You can read more about how to identify the risks, here:
Read in full: Smartwatch bands can contain high levels of toxic PFAS, study finds
Related: PFAS Exposure & Cancer: The Numbers Are High
The cows giving milk with a little extra
Bird flu (HPAI) is now not the only flu epidemic amongst cattle in the US, and not only that, but rather than “merely” colonizing the lungs and upper respiratory tracts, in this case the virus (IAV) is thriving in the mammary glands, meaning that yes, it gets dispensed into the milk, and so far scientists are simply scrambling to find better ways to vaccinate the cattle, in the hopes that the milk will not be so risky because yes, it is currently a “reservoir and transmission vector” for the virus.
There are, however, barriers to creating those vaccines:
Read in full: Unexpected viral reservoir: influenza A thrives in cattle mammary glands
Related: Cows’ Milk, Bird Flu, & You
Take care!
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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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Foods For Managing Hypothyroidism (incl. Hashimoto’s)
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Foods for Managing Hypothyroidism
For any unfamiliar, hypothyroidism is the condition of having an underactive thyroid gland. The thyroid gland lives at the base of the front of your neck, and, as the name suggests, it makes and stores thyroid hormones. Those are important for many systems in the body, and a shortage typically causes fatigue, weight gain, and other symptoms.
What causes it?
This makes a difference in some cases to how it can be treated/managed. Causes include:
- Hashimoto’s thyroiditis, an autoimmune condition
- Severe inflammation (end result is similar to the above, but more treatable)
- Dietary deficiencies, especially iodine deficiency
- Secondary endocrine issues, e.g. pituitary gland didn’t make enough TSH for the thyroid gland to do its thing
- Some medications (ask your pharmacist)
We can’t do a lot about those last two by leveraging diet alone, but we can make a big difference to the others.
What to eat (and what to avoid)
There is nuance here, which we’ll go into a bit, but let’s start by giving the
one-linetwo-line summary that tends to be the dietary advice for most things:- Eat a nutrient-dense whole-foods diet (shocking, we know)
- Avoid sugar, alcohol, flour, processed foods (ditto)
What’s the deal with meat and dairy?
- Meat: avoid red and processed meats; poultry and fish are fine or even good (unless fried; don’t do that)
- Dairy: limit/avoid milk; but unsweetened yogurt and cheese are fine or even good
What’s the deal with plants?
First, get plenty of fiber, because that’s important to ease almost any inflammation-related condition, and for general good health for most people (an exception is if you have Crohn’s Disease, for example).
If you have Hashimoto’s, then gluten (as found in wheat, barley, and rye) may be an issue, but the jury is still out, science-wise. Here’s an example study for “avoid gluten” and “don’t worry about gluten”, respectively:
- The Effect of Gluten-Free Diet on Thyroid Autoimmunity in Women with Hashimoto’s Thyroiditis
- Doubtful Justification of the Gluten-Free Diet in the Course of Hashimoto’s Disease
So, you might want to skip it, to be on the safe side, but that’s up to you (and the advice of your nutritionist/doctor, as applicable).
A word on goitrogens…
Goitrogens are found in cruciferous vegetables and soy, both of which are very healthy foods for most people, but need some extra awareness in the case of hypothyroidism. This means there’s no need to abstain completely, but:
- Keep serving sizes small, for example a 100g serving only
- Cook goitrogenic foods before eating them, to greatly reduce goitrogenic activity
For more details, reading even just the abstract (intro summary) of this paper will help you get healthy cruciferous veg content without having a goitrogenic effect.
(as for soy, consider just skipping that if you suffer from hypothyroidism)
What nutrients to focus on getting?
- Top tier nutrients: iodine, selenium, zinc
- Also important: vitamin B12, vitamin D, magnesium, iron
Enjoy!
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Healthy Hormones And How To Hack Them
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Healthy Hormones And How To Hack Them!
Hormones are vital for far more than they tend to get credit for. Even the hormones that people think of first—testosterone and estrogen—do a lot more than just build/maintain sexual characteristics and sexual function. Without them, we’d lack energy, we’d be depressed, and we’d soon miss the general smooth-running of our bodies that we take for granted.
And that’s without getting to the many less-talked-about hormones that play a secondary sexual role or are in the same general system…
How are your prolactin levels, for example?
Unless you’re ill, taking certain medications, recently gave birth, or picked a really interesting time to read this newsletter, they’re probably normal, by the way.
But, prolactin can explain “la petite mort”, the downturn in energy and the somewhat depressed mood that many men experience after orgasm.
Otherwise, if you have too much prolactin in general, you will be sleepy and depressed.
Prolactin’s primary role? In women, it stimulates milk production when needed. In men, it plays a role in regulating mood and metabolism.
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Coffee & Your Gut
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Coffee, in moderation, is generally considered a healthful drink—speaking for the drink itself, at least! Because the same cannot be said for added sugar, various sorts of creamers, or iced caramelatte mocha frappucino dessert-style drinks:
The Bitter Truth About Coffee (or is it?)
Caffeine, too, broadly has more pros than cons (again, in moderation):
Caffeine: Cognitive Enhancer Or Brain-Wrecker?
Some people will be concerned about coffee and the heart. Assuming you don’t have a caffeine sensitivity (or you do but you drink decaf), it is heart-neutral in moderation, though there are some ways of preparing it that are better than others:
Make Your Coffee Heart-Healthier!
So, what about coffee and the gut?
The bacteria who enjoy a good coffee
Amongst our trillions of tiny friends, allies, associates, and enemies-on-the-inside, which ones like coffee, and what kind of coffee do they prefer?
A big (n=35,214) international multicohort analysis examined the associations between coffee consumption and very many different gut microbial species, and found:
115 species were positively associated with coffee consumption, mostly of the kind considered “friendly”, including ones often included in probiotic supplements, such as various Bifidobacterium and Lactobacillus species.
The kind that was most strongly associated with coffee consumption, however, was Lawsonibacter asaccharolyticus, a helpful little beast who converts chlorogenic acid (one of the main polyphenols in coffee) into caffeic acid, quinic acid, and various other metabolites that we can use.
More specifically: moderate coffee-drinkers, defined as drinking 1–3 cups per day, enjoyed a 300–400% increase in L. asaccharolyticus, while high coffee-drinkers (no, not that kind of high), defined as drinking 4 or more cups of coffee per day, enjoyed a 400–800% increase, compared to “never/rarely” coffee-drinkers (defined as drinking 2 or fewer cups per month).
Click here to see more data from the study, in a helpful infographic
Things that did not affect the outcome:
- The coffee-making method—it seems the bacteria are not fussy in this regard, as espresso or brewed, and even instant, yielded the same gut microbiome benefits
- The caffeine content—as both caffeinated and decaffeinated yielded the same gut microbiome benefits
You can read the paper itself in full for here:
Want to enjoy coffee, but not keen on the effects of caffeine or the taste of decaffeinated?
Taking l-theanine alongside coffee flattens the curve of caffeine metabolism, and means one can get the benefits without unwanted jitteriness:
Enjoy!
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Staying Alive – by Dr. Jenny Goodman
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A lot of “healthy long life” books are science-heavy to the point of being quite challenging to read—they become excellent reference sources, but not exactly “curl up in the armchair” books.
Dr. Goodman writes in a much more reader-friendly fashion, casual yet clear.
She kicks off with season-specific advice. What does that mean? Basically, our bodies need different things at different times of year, and we face different challenges to good health. We may ignore such at our peril!
After a chapter for each of the four seasons (assuming a temperate Northern Hemisphere climate), she goes on to cover the seasons of our life. Once again, our bodies need different things at different times in our life, and we again face different challenges to good health!
There’s plenty of “advice for all seasons”, too. Nutritional dos and don’t, and perennial health hazards to avoid.
As a caveat, she does also hold some unscientific views that may be skipped over. These range from “plant-based diets aren’t sustainable” to “this detox will get rid of heavy metals”. However, the value contained in the rest of the book is more than sufficient to persuade us to overlook those personal quirks.
In particular, she offers very good advice on overcoming cravings (and distinguishing them from genuine nutritional cravings), and taking care of our “trillions of tiny companions” (beneficial gut microbiota) without nurturing Candida and other less helpful gut flora and fauna.
In short, a fine lot of information in a very readable format.
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