Why Do We Have Crooked Teeth When Our Ancestors Didn’t?
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Evidence shows that people in ancient times typically had straight teeth set well into strong jaws, with even wisdom teeth fitting properly.
So, what went wrong? Did evolution do us a disservice?
Some information to chew on
Transition from hard-to-chew diets to processed, refined foods over millennia has reduced jaw size while tooth size stayed constant. Smaller jaws lead to tooth crowding, crookedness, and impacted wisdom teeth, requiring braces or extractions in modern times.
However, all is not lost!
Studies on non-human animals show softer diets reduce jaw and facial growth, causing dental crowding. In other words: dental crowding is primarily attributed to dietary and lifestyle changes, though genetics may play a role.
And notably, when it comes to humans, populations with less processed diets experience fewer dental problems, suggesting lifestyle modifications could help prevent tooth crowding.
And no, it is not too late. Remember, you are rebuilding your body all the time, including your bones!
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
The Exercises That Can Fix Sinus Problems (And More) ← this also improves the jaw structure
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10 “Healthy” Foods That Are Often Worse Than You Think
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“This is healthy, it’s a…” is an easy mistake to make if one doesn’t read the labels. Here are 10 tricksters to watch out for in particular!
Don’t be fooled by healthy aesthetics on the packaging…
Notwithstanding appearances and in many cases reputations, these all merit extra attention:
- Yogurt: sweetened yogurts, especially “fruit at the bottom / in the corner” types, often have 15–30g of sugar per serving. Plain Greek yogurt is a better choice, offering 15–20g of protein with no added sugar. You can always add fresh fruits or spices like sweet cinnamon for flavor without added sugar.
- Oatmeal: prepackaged oatmeal can contain 12–15 grams of added sugar per serving, similar to a glazed donut. Additionally, finely milled oats (as in “instant” oatmeal) can cause blood sugar spikes by itself, due to the loss of fiber. Better is plain oats, and if you like, you can sweeten them naturally with sweet cinnamon and/or fresh fruit for a healthier breakfast.
- Sushi: while sushi contains nutritious fish, it often has too much white rice (and in the US, sushi rice is also often cooked with sugar to “improve” the taste and help cohesion) and sugary sauces. This makes many rolls much less healthy. So if fish (the sashimi component of sushi) is your thing, then focus on that, and minimize sugar intake for a more balanced meal.
- Baked beans: store-bought baked beans can have up to 25g of added sugar per cup, similar to soda. Better to opt for plain beans and prepare them at home so that nothing is in them except what you personally put there.
- Deli meats: deli meats are convenient but often are more processed than they look, containing preservatives linked to health risks. Fresh, unprocessed meats like chicken or turkey breast are healthier and can still be cost-effective when bought in bulk.
- Fruit juices: fruit juices lack fiber (meaning their own natural sugars also become harmful, with no fiber to slow them down) and often contain added sugars too. Eating whole fruits is a much better way to get fiber, nutrients, and controlled healthy sugar intake.
- Hazelnut spread: hazelnut spreads are usually 50% added sugar and contain unhealthy oils like palm oil. So, skip those, and enjoy natural nut butters for healthier fats and proteins.
- Granola: granola is often loaded with added sugars and preservatives, so watch out for those.
- Sports drinks: sports drinks, with 20–25g of added sugar per serving, are unnecessary and unhelpful (except, perhaps, in case of emergency for correcting diabetic hypoglycemia). Stick to water or electrolyte drinks—and even in the latter case, check the labels for added sugar and excessive sodium!
- Dark chocolate: dark chocolate with 80% or more cocoa has health benefits but still typically contains a lot of added sugar. Check labels carefully!
For more on each of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
From Apples to Bees, and High-Fructose Cs: Which Sugars Are Healthier, And Which Are Just The Same?
Take care!
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All of your hepatitis B vaccine questions answered
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Hepatitis B is a viral infection that can cause liver disease in people of any age or background. Vaccination is 95 percent effective against the virus. But in recent years, false claims, rumors, and myths about the hepatitis B vaccine have become increasingly common.
Here’s everything you need to know about the lifesaving hepatitis B vaccine.
What is hepatitis B?
Hepatitis B is a liver infection caused by the hepatitis B virus. The virus attacks the liver, causing severe short-term and long-term infections.
Short-term hepatitis B infections may cause “fever, fatigue, loss of appetite, nausea, vomiting, jaundice (yellow skin or eyes, dark urine, clay-colored bowel movements), and pain in the muscles, joints, and stomach,” according to the Centers for Disease Control and Prevention.
A long-term hepatitis B infection occurs when the virus stays in the body beyond the initial infection, causing chronic illness. Hepatitis B infections become chronic in 90 percent of infected infants, half of infected young children, and between 5 to 10 percent of infected adults.
“Most people who go on to develop chronic hepatitis B do not have symptoms, but it is still very serious and can lead to liver damage (cirrhosis), liver cancer, and death. Chronically infected people can spread hepatitis B virus to others, even if they do not feel or look sick themselves,” says the CDC.
How does the hepatitis B virus spread?
The hepatitis B virus is spread through body fluids, including blood, semen, and saliva. It can also be transmitted from birthing parent to child during pregnancy and childbirth.
“While hepatitis B is an infection that lives in bodily fluids, it can survive outside the human body for several days, which means that sharing contaminated household products is a possible source of infection,” said Dr. Christopher Labos, a McGill University cardiologist and epidemiologist, in a 2019 article.
In 2022, over 250 million people worldwide had chronic hepatitis B, and 1.1 million died from the disease. Most of the deaths were from liver damage and liver cancer. Less than 15 percent of people living with hepatitis B have been diagnosed.
How well does the vaccine protect against hepatitis B?
Hepatitis B vaccination is up to 95 percent effective, providing lasting—and possibly lifelong—protection against the virus. Depending on when the first dose is given, the complete vaccine series consists of two to three doses.
The vaccine is most effective for infants and children. The CDC recommends that infants receive it at birth for the most protection.
The first dose is followed by two to three additional doses administered before 18 months. Children, adolescents, and adults who weren’t vaccinated as infants should also receive the vaccine.
Vaccination is particularly important for high-risk groups, including health workers and those who are in close contact with individuals living with chronic hepatitis B, people who use intravenous drugs, and people receiving blood transfusions, dialysis, or organ transplants.
Is the vaccine safe?
Vaccines against hepatitis B were first developed in the 1980s, and they have been proven safe for decades. They have a low risk of serious side effects and are safe enough to be given to newborns, pregnant people, and immunocompromised people.
We also know hepatitis B vaccines work: “Between 1990 (about the time when universal hepatitis B vaccinations started) and 2006, the rate of hepatitis B infection fell by 81 percent to the lowest level ever recorded, and the decline was greatest among children,” added Labos.
Hepatitis B rates have continued to decline across all age groups, with the U.S. exceeding its goal of reducing new hepatitis B infections by 20 percent.
Why do doctors recommend the vaccine for babies?
Hepatitis B vaccination helps protect infants from a lifetime of potentially life-threatening infections and complications. Nine out of 10 unvaccinated infants infected with hepatitis B will develop chronic infections, which increases their risk of liver failure and liver cancer.
The hepatitis B vaccine is administered at birth to help prevent the virus from being transmitted from birthing parent to child. It also helps protect infants who might be in close contact with someone with hepatitis B. This is particularly important because most people who have hepatitis are undiagnosed.
Have more questions? Talk to your health care provider to learn more about hepatitis B vaccination.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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Two Awesome Hours – by Dr. Josh Davis
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The brain is an amazing and powerful organ, with theoretically unlimited potential in some respects. So why doesn’t it feel that way a lot of the time?
The truth is that not only are we often tired, dehydrated, or facing other obvious physiological challenges to peak brain health, but also… We’re simply not making the best use of it!
What Dr. Davis does is outline for us how we can create the conditions for “two awesome hours” of effective mental performance by:
- Recognizing when to most effectively flip the switch on our automatic thinking
- Scheduling tasks based on their “processing demand” and recovery time
- Learning how to direct attention, rather than avoid distractions
- Feeding and moving our bodies in ways that prep us for success
- Identifying what matters in our environment to be at the top of our mental game
Why only two hours? Why not four, or eight, or more?
Well, our brains need recovery time too, so we can’t be “always on” and operating and peak efficiency. But, what we can do is optimize a couple of hours for absolute peak efficiency, and then enjoy the rest of time with lower cognitive-load activities.
Bottom line: if the idea of what you could accomplish if you could just be guaranteed two schedulable hours (your preference when!) of peak cognitive performance per day, then this is a great book for you.
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Building Psychological Resilience (Without Undue Hardship)
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What’s The Worst That Could Happen?
When we talk about the five lifestyle factors that make the biggest difference to health, stress management would be a worthy addition as number six. We haven’t focused explicitly on that for a while, so let’s get ready to start the New Year on a good footing…
You’re not going to have a stress-free 2024
What a tender world that would be! Hopefully your stressors will be small and manageable, but rest assured, things will stress you.
And that’s key: “rest assured”. Know it now, prepare for it, and build resilience.
Sounds grim, doesn’t it? It doesn’t have to be, though.
When the forecast weather is cold and wet, you’re not afraid of it when you have a warm dry house. When the heating bill comes for that warm dry house, you’re not afraid of it when you have money to pay it. If you didn’t have the money and the warm dry house, the cold wet weather could be devastating to you.
The lesson here is: we can generally handle what we’re prepared for.
Negative visualization and the PNS
This is the opposite of what a lot of “think and grow rich”-style gurus would advise. And indeed, it’s not helpful to slide into anxious worrying.
If you do find yourself spiralling, here’s a tool for getting out of that spiral:
RAIN: an intervention for dealing with difficult emotions
For now, however, we’re going to practice Radical Acceptance.
First, some biology: you may be aware that your Central Nervous System (CNS) branches into the Sympathetic Nervous System (SNS) and the Parasympathetic Nervous System (PNS).
The PNS is the part that cues our body to relax, and suppresses our fight/flight response. We’re going to activate it.
Activating the PNS is easy for most people in comfortable circumstances (e.g., you are not currently exposed to stressful stimuli). It may well be activated already, and if it’s not, a few deep breaths is usually all it takes.
If you’d like a quick and easy Mindfulness-Based Stress Reduction (MBSR) technique, here you go:
No-Frills, Evidence-Based Mindfulness
Activating the PNS is hard for most people in difficult circumstances (e.g., you either are currently exposed to stressful stimuli, or you are in one of the emotional spirals we discussed earlier).
However, we can trick our bodies and brains by—when we are safe and unstressed—practicing imagining those stressful stimuli. Taking a moment to not just imagine it experientially, but immersively. This, in CBT and DBT, is the modern equivalent to the old samurai who simply accepted, before battle, that they were already dead—and thus went into battle with zero fear of death.
A less drastic example is the zen master who had a favorite teacup, and feared it would get broken. So he would tell himself “the cup is already broken”. One day, it actually broke, and he simply smiled ruefully and said “Of course”.
How this ties together: practice the mindfulness-based stress reduction we linked above, while imagining the things that do/would stress you the most.
Since it’s just imagination, this is a little easier than when the thing is actually happening. Practicing this way means that when and if the thing actually happens (an unfortunate diagnosis, a financial reversal, whatever it may be), our CNS is already well-trained to respond to stress with a dose of PNS-induced calm.
You can also leverage hormesis, a beneficial aspect of (in this case, optional and chosen by you) acute stress:
Dr. Elissa Epel | The Stress Prescription
Psychological resilience training
This (learned!) ability to respond to stress in an adaptive fashion (without maladaptive coping strategies such as unhelpful behavioral reactivity and/or substance use) is a key part of what in psychology is called resilience:
And yes, the CBT/DBT/MBSR methods we’ve been giving you are the evidence-based gold standard.
Only the best for 10almonds subscribers! 😎
❝That was helpful, but not cheery; can we finish the year on a cheerier note?❞
We can indeed:
How To Get Your Brain On A More Positive Track (Without Toxic Positivity)
Take care!
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Test For Whether You Will Be Able To Achieve The Splits
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Some people stretch for years without being able to do the splits; others do it easily after a short while. Are there people for whom it is impossible, and is there a way to know in advance whether our efforts will be fruitful? Liv (of “LivInLeggings” fame) has the answer:
One side of the story
There are several factors that affect whether we can do the splits, including:
- arrangement of the joint itself
- length of tendons and muscles
- “stretchiness” of tendons and muscles
The latter two things, we can readily train to improve. Yes, even the basic length can be changed over time, because the body adapts.
The former thing, however (arrangement of the joint itself) is near-impossible, because skeletal changes happen more slowly than any other changes in the body. In a battle of muscle vs bone, muscle will always win eventually, and even the bone itself can be rebuilt (as the body fixes itself, or in the case of some diseases, messes itself up). However, changing the arrangement of your joint itself is far beyond the auspices of “do some stretches each day”. So, for practical purposes, without making it the single most important thing in your life, it’s impossible.
How do we know if the arrangement of our hip joint will accommodate the splits? We can test it, one side at a time. Liv uses the middle splits, also called the side splits or box splits, as an example, but the same science and the same method goes for the front splits.
Stand next to a stable elevated-to-hip-height surface. You want to be able to raise your near-side leg laterally, and rest it on the surface, such that your raised leg is now perfectly perpendicular to your body.
There’s a catch: not only do you need to still be stood straight while your leg is elevated 90° to the side, but also, your hips still need to remain parallel to the floor—not tilted up to one side.
If you can do this (on both sides, even if not both simultaneously right now), then your hip joint itself definitely has the range of motion to allow you to do the side splits; you just need to work up to it. Technically, you could do it right now: if you can do this on both sides, then since there’s no tendon or similar running between your two legs to make it impossible to do both at once, you could do that. But, without training, your nerves will stop you; it’s an in-built self-defense mechanism that’s just firing unnecessarily in this case, and needs training to get past.
If you can’t do this, then there are two main possibilities:
- Your joint is not arranged in a way that facilitates this range of motion, and you will not achieve this without devoting your life to it and still taking a very long time.
- Your tendons and muscles are simply too tight at the moment to allow you even the half-split, so you are getting a false negative.
This means that, despite the slightly clickbaity title on YouTube, this test cannot actually confirm that you can never do the middle splits; it can only confirm that you can. In other words, this test gives two possible results:
- “Yes, you can do it!”
- “We don’t know whether you can do it”
For more on the anatomy of this plus a visual demonstration of the test, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Stretching Scientifically – by Thomas Kurz ← this is our review of the book she’s working from in this video; this book has this test!
Take care!
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What’s The Difference Between Minoxidil For Men vs For Women?
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
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’m confused, does minoxidil work the same for women and for men? The label on the minoxidil I was looking at says it is only for men❞
Great question!
Simple answer: yes, it works (or not, as the case may be for some people, more on that later) exactly the same for men and women.
You may be wondering: what, then, is the difference between minoxidil for men and minoxidil for women?
And the answer is: the packaging/marketing. That’s literally it.
It’s like with razors, there are razors marketed to men and razors marketed to women, and both come with advertising/marketing promising to be enhance your masculine/feminine appearance (as applicable), but at the end of the day, in both cases it’s just sharp steel blades that cut through hairs as closely as possible to the skin. The sharp steel neither knows nor cares about your gender.
When it comes to minoxidil, in both cases the active ingredient is indeed minoxidil, usually at 2% or 5% strength (though other options exist, and all these get marketed to men and women), and in both cases it works in the same ways, by:
- dilating the blood vessels that feed the hair follicles and thus allowing them to perform better
- kicking the follicles into anagen (growth phase) and keeping them there for longer
Note: this is why we mentioned that it won’t work for all people, and it’s because (regardless of sex/gender), it cannot do those things for your hair follicles if you do not have hair follicles to treat. In the case of someone who has had hair loss for a long time, sometimes there will not be enough living follicles remaining to do anything useful with. As a general rule of thumb, provided you have some hairs there (even if they are little downy baby hairs), they can usually be coaxed back to full life.
In both cases, it’s for treating “pattern hair loss”, the pattern being “male pattern” or “female pattern”, respectively, but in both cases it’s androgenetic alopecia, and in both cases it’s caused by the corresponding genetic factors and hormone-mediated gene expression (the physical pattern therefore is usually a little different for men and women; that’s because of the “hormone-mediated gene expression”, or to put it into lay terms “the hormones tell the body which genes to turn on and off”.
Fun fact: it’s the same resultant phenotype as for PCOS, though usually occurring at different stages in life; PCOS earlier and AGA later—sometimes people (including people with both ovaries and hair) can get one without the other, though, as there may be other considerations going on besides the genetic and hormonal.
Limitation: if the hair loss is for reasons other than androgenetic alopecia, it’s unlikely to work. In fact, it is usually flat-out stated that it won’t work, but since one of the common listed side effects of minoxidil is “hair growth in other places”, it seems fair to say that the scalp is not really the only place it can cause hair to grow.
Want to know more?
You can read about the science of various pharmaceutical options (including minoxidil) here:
Hair-Loss Remedies, By Science ← this also goes more into the pros and cons of minoxidil than we have today, so if you’re considering minoxidil, you might want to read this first, to make the most informed decision.
And if you want to be a bit less pharmaceutical about it:
Take care!
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