The Vagus Nerve (And How You Can Make Use Of It)
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The Vagus Nerve: The Brain-Gut Highway
The longest cranial nerve is the vagus nerve; it runs all the way from your brain to your colon. It’s very important, and (amongst other tasks) it largely regulates your parasympathetic nervous system, and autonomous functions like:
- Breathing
- Heart rate
- Vasodilation & vasoconstriction
- Blood pressure
- Reflex actions (e.g. coughing, sneezing, swallowing, vomiting, hiccuping)
That’s great, but how does knowing about it help us?
Because of vagal maneuvers! This means taking an action to stimulate the vagus nerve, and prompt it to calm down various bodily functions that need calming down. This can take the form of:
- Massage
- Electrostimulation
- Diaphragmatic breathing
Massage is perhaps the simplest; “vagus” means “wandering”, and the nerve is accessible in various places, including behind the ears. That’s the kind of thing that’ easier to show than tell, though, so we’ll include a video at the end.
Electrostimulation is the fanciest, and has been used to treat migraines and cluster headaches. Check out, for example:
Update on noninvasive neuromodulation for migraine treatment-Vagus nerve stimulation
Diaphragmatic breathing means breathing from the diaphragm—the big muscular tissue that sits under your lungs. You might know it as “abdominal breathing”, and refers to breathing “to the abdomen” rather than merely to the chest.
Even though your lungs are obviously in your chest not your abdomen, breathing with a focus on expanding the abdomen (rather than the chest) when breathing in, will result in much deeper breathing as the diaphragm allows the lungs to fill downwards as well as outwards.
Why this helps when it comes to the vagus nerve is simply that the vagus nerve passes by the diaphragm, such that diaphragmatic breathing will massage the vagus nerve deep inside your body.
More than just treating migraines
Vagus nerve stimulation has also been researched and found potentially helpful for managing:
- Depression, inflammation, and heart disease
- Diabetes and glycemic issues in general
- Multiple sclerosis and autoimmune disease in general
- Alzheimer’s disease and dementia in general
- Rheumatoid arthritis (we already mentioned inflammation and autoimmune diseases, but this is an interesting paper so we included it)
All this is particularly important as we get older, because vagal response reduces with age, and vagus nerve stimulation, which improves vagal tone, makes it easier not just to manage the aforementioned maladies, but also simply to relax more easily and more deeply.
See: Influence of age and gender on autonomic regulation of heart
We promised a video for the massage, so here it is:
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Early Bird Or Night Owl? Genes vs Environment
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A Sliding Slope?
In Tuesday’s newsletter, we asked you how much control you believe we have over our sleep schedule, and got the above-depicted, below-described, set of responses:
- 45% said “most people can control it; some people with sleep disorders cannot
- 35% said “our genes predispose us to early/late, but we can slide it a bit
- 15% said: “going against our hardwired sleep schedules is a road to ruin”
- 5% said “anyone can adjust their sleep schedule with enough willpower”
You may be wondering: what’s with those single-digit numbers in the graph there? And the answer is: Tuesday’s email didn’t go out at the usual time due to a scheduling mistake (sorry!), which is probably what affected the number of responses (poll response levels vary, but are usually a lot higher than this).
Note: yes, this does mean most people who read our newsletter don’t vote. So, not to sound like a politician on the campaign trail, but… Your vote counts! We always love reading your comments when you add those, too—often they provide context that allow us to tailor what we focus on in our articles
However, those are the responses we got, so here we are!
What does the science say?
Anyone can adjust their sleep with enough willpower: True or False?
False, simply. It’s difficult for most people, but for many people with sleep disorders, it is outright impossible.
In a battle of narcolepsy vs willpower, for example, no amount of willpower will stop the brain from switching to sleep mode when it thinks it’s time to sleep:
❝Narcolepsy is the most common neurological cause of chronic sleepiness. The discovery about 20 years ago that narcolepsy is caused by selective loss of the neurons producing orexins sparked great advances in the field
[There is also] developing evidence that narcolepsy is an autoimmune disorder that may be caused by a T cell-mediated attack on the orexin neurons and explain how these new perspectives can inform better therapeutic approaches.❞
~ Dr. Carrie Mahoney et al. (lightly edited for brevity)
Source: The neurobiological basis of narcolepsy
For further reading, especially if this applies to you or a loved one:
Our genes predispose us to early/late, but we can slide it a bit: True or False?
True! First, about our genes predisposing us:
…and also:
Gene distinguishes early birds from night owls and helps predict time of death
Now, as for the “can slide it a bit”, this is really just a function of the general categories of “early bird” and “night owl” spanning periods of time that allow for a few hours’ wiggle-room at either side.
However, it is recommended to make any actual changes more gradually, with the Sleep Foundation going so far as to recommend 30 minutes, or even just 15 minutes, of change per day:
Sleep Foundation | How to Fix Your Sleep Schedule
Going against our hardwired sleep schedule is a road to ruin: True or False?
False, contextually. By this we mean: our “hardwired” sleep schedule is (for most of us), genetically predisposed but not predetermined.
Also, genetic predispositions are not necessarily always good for us; one would not argue, for example, for avoiding going against a genetic predisposition to addiction.
Some genetic predispositions are just plain bad for us, and genes can be a bit of a lottery.
That said, we do recommend getting some insider knowledge (literally), by getting personal genomics tests done, if that’s a viable option for you, so you know what’s really a genetic trait (and what to do with that information) and what’s probably caused by something else (and what to do with that information):
Genetic Testing: Health Benefits & Methods
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What you need to know about PCOS
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In 2008, microbiologist Sasha Ottey saw her OB-GYN because she had missed some periods. The doctor ran blood tests and gave her an ultrasound, diagnosing her with polycystic ovary syndrome (PCOS). She also told her not to worry, referred her to an endocrinologist (a doctor who specializes in hormones), and told her to come back when she wanted to get pregnant.
“I found [that] quite dismissive because that was my reason for presenting to her,” Ottey tells PGN. “I felt that she was missing an opportunity to educate me on PCOS, and that was just not an accurate message: Missing periods can lead to other serious, life-threatening health conditions.”
During the consultation with the endocrinologist, Ottey was told to lose weight and come back in six months. “Again, I felt dismissed and left up to my own devices to understand this condition and how to manage it,” she says.
Following that experience, Ottey began researching and found that thousands of people around the world had similar experiences with their PCOS diagnoses, which led her to start and lead the advocacy and support organization PCOS Challenge.
PCOS is the most common hormonal condition affecting people with ovaries of reproductive age. In the United States, one in 10 women of childbearing age have the condition, which affects the endocrine and reproductive systems and is a common cause of infertility. Yet, the condition is significantly underdiagnosed—especially among people of color—and under-researched.
Read on to find out more about PCOS, what symptoms to look out for, what treatments are available, and useful resources.
What is PCOS, and what are its most common symptoms?
PCOS is a chronic hormonal condition that affects how the ovaries work. A hormonal imbalance causes people with PCOS to have too much testosterone, the male sex hormone, which can make their periods irregular and cause hirsutism (extra hair), explains Dr. Melanie Cree, associate professor at the University of Colorado School of Medicine and director of the Multi-Disciplinary PCOS clinic at Children’s Hospital Colorado.
This means that people can have excess facial or body hair or experience hair loss.
PCOS also impacts the relationship between insulin—the hormone released when we eat—and testosterone.
“In women with PCOS, it seems like their ovaries are sensitive to insulin, and so when their ovaries see insulin, [they] make extra testosterone,” Cree adds. “So things that affect insulin levels [like sugary drinks] can affect testosterone levels.”
Other common symptoms associated with PCOS include:
- Acne
- Thinning hair
- Skin tags or excess skin in the armpits or neck
- Ovaries with many cysts
- Infertility
- Anxiety, depression, and other mental health conditions
- Sleep apnea, a condition where breathing stops and restarts while sleeping
What causes PCOS?
The cause is still unknown, but researchers have found that the condition is genetic and can be inherited. Experts have found that exposure to harmful chemicals like PFAs, which can be present in drinking water, and BPA, commonly used in plastics, can also increase the risk for PCOS.
Studies have shown that “BPA can change how the endocrine system develops in a developing fetus … and that women with PCOS tend to also have more BPA in their bodies,” adds Dr. Felice Gersh, an OB-GYN and founder and director of the Integrative Medical Group of Irvine, which treats patients with PCOS.
How is PCOS diagnosed?
PCOS is diagnosed through a physical exam; a conversation with your health care provider about your symptoms and medical history; a blood test to measure your hormone levels; and, in some cases, an ultrasound to see your ovaries.
PCOS is what’s known as a “diagnosis of exclusion,” Ottey says, meaning that the provider must rule out other conditions, such as thyroid disease, before diagnosing it.
Why isn’t more known about PCOS?
Research on PCOS has been scarce, underfunded, and narrowly focused. Research on the condition has largely focused on the reproductive system, Ottey says, even though it also affects many aspects of a person’s life, including their mental health, appearance, metabolism, and weight.
“There is the point of getting pregnant, and the struggle to get pregnant for so many people,” Ottey adds. “[And] once that happens, [the condition] also impacts your ability to carry a healthy pregnancy, to have healthy babies. But outside of that, your metabolic health is at risk from having PCOS, your mental health is at risk, [and] overall health and quality of life, they’re all impacted by PCOS.”
People with PCOS are more likely to develop other serious health issues, like high blood pressure, heart problems, high cholesterol, uterine cancer, and diabetes. Cree says that teenagers with PCOS and obesity have “an 18-fold higher risk of type 2 diabetes” in their teens and that teenagers who get type 2 diabetes are starting to die in their late 20s and early 30s.
What are some treatments for PCOS?
There is still no single medication approved by the Food and Drug Administration specifically for PCOS, though advocacy groups like PCOS Challenge are working with the agency to incorporate patient experiences and testimonials into a possible future treatment. Treatment depends on what symptoms you experience and what your main concerns are.
For now, treatment options include the following:
- Birth control: Your provider may prescribe birth control pills to lower testosterone levels and regulate your menstrual cycle.
- Lifestyle changes: Because testosterone can affect insulin levels, Cree explains that regardless of a patient’s weight, a diet with lower simple carbohydrates (such as candy, sugar, sweets, juices, sodas, and coffee drinks) is recommended.
“When you have a large amount of sugar like that, especially as a liquid, it gets into your bloodstream very quickly,” adds Cree. “And so you then release a ton of insulin that goes to the ovary, and you make a bunch of testosterone.”
More exercise is also recommended for both weight loss and weight maintenance, Cree says: “Food changes and better activity work directly to lower insulin, to lower testosterone.”
- Metformin: Even though it’s a medication for type 2 diabetes, it’s used in patients with PCOS because it can reduce insulin levels, and as a result, lower testosterone levels.
What should I keep in mind if I have (or think I may have) PCOS?
If your periods are irregular or you have acne, facial hair, or hair loss, tell your provider—it could be a sign that you have PCOS or another condition. And ask questions.
“I call periods a vital sign for women, if you’re not taking hormones,” Cree says. “Our bodies are really smart: Periods are to get pregnant, and if our body senses that we’re not healthy enough to get pregnant, then we don’t have periods. That means we’ve got to figure out why.”
Once you’re diagnosed, Ottey recommends that you “don’t go through extremes, yo-yo dieting, or trying to achieve massive weight loss—it only rebounds.”
She adds that “when you get this diagnosis, [there’s] a lot that might feel like it’s being taken away from you: ‘Don’t do this. Don’t eat this. Don’t do that.’ But what I want everyone to think of is what brings you joy, and do more of that and incorporate a lot of healthy activities into your life.”
Resources for PCOS patients:
- AskPCOS: A guide designed by experts on the condition that helps answer all your questions about it and how to manage it.
- PCOS Challenge: An advocacy and support organization for people with PCOS.
- PCOS Patient Communication Guide: A tool for better communication with your health care providers.
- Polycystic Ovary Syndrome Question Prompt List: Questions you can ask your provider about PCOS.
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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Oven-Roasted Ratatouille
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This is a supremely low-effort, high-yield dish. It’s a nutritional tour-de-force, and very pleasing to the tastebuds too. We use flageolet beans in this recipe; they are small immature kidney beans. If they’re not available, using kidney beans or really any other legume is fine.
You will need
- 2 large zucchini, sliced
- 2 red peppers, sliced
- 1 large eggplant, sliced and cut into semicircles
- 1 red onion, thinly sliced
- 2 cans chopped tomatoes
- 2 cans flageolet beans, drained and rinsed (or 2 cups same, cooked, drained, and rinsed)
- ½ bulb garlic, crushed
- 2 tbsp extra virgin olive oil
- 1 tbsp balsamic vinegar
- 1 tbsp black pepper, coarse ground
- 1 tbsp nutritional yeast
- 1 tbsp red chili pepper flakes (omit or adjust per your heat preferences)
- ½ tsp MSG or 1 tsp low-sodium salt
- Mixed herbs, per your preference. It’s hard to go wrong with this one, but we suggest leaning towards either basil and oregano or rosemary and thyme. We also suggest having some finely chopped to go into the dish, and some held back to go on the dish as a garnish.
Method
(we suggest you read everything at least once before doing anything)
1) Preheat the oven to 350℉ / 180℃.
2) Mix all the ingredients (except the tomatoes and herbs) in a big mixing bowl, ensuring even distribution.
2) Add the tomatoes. The reason we didn’t add these before is because it would interfere with the oil being distributed evenly across the vegetables.
3) Transfer to a deep-walled oven tray or an ovenproof dish, and roast for 30 minutes.
4) Stir, add the chopped herbs, stir again, and return to the oven for another 30 minutes.
5) Serve (hot or cold), adding any herb garnish you wish to use.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Lycopene’s Benefits For The Gut, Heart, Brain, & More
- Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- Capsaicin For Weight Loss And Against Inflammation
- The Many Health Benefits Of Garlic
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
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Make Your Saliva Better For Your Teeth
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A new study has highlighted the importance of lifestyle factors in shaping the oral microbiome—that is to say, how the things we do affect the bacteria that live in our mouths:
Nepali oral microbiomes reflect a gradient of lifestyles from traditional to industrialized
Neither the study title nor the abstract elucidate how, exactly, one impacts the other, but the study itself does (of course) contain that information; we read it, and the short version is:
In terms of the extremes of “most traditional” to “most industrialized”, foragers have the most diverse oral microbiomes (that’s good), and people with an American industrialized lifestyle had the least diverse oral microbiomes (that’s bad). Between the two extremes, we see the gradient promised by the title.
If you do feel like checking it out, Figure 3 in the paper illustrates this nicely.
Also illustrated in the above-linked Figure 3 is oral microbiome composition. In other words (and to oversimplify it rather), how good or bad our mouth bacteria are for us, independent of diversity (so for example, are there more of this or that kind of bacteria).
Once again, there is a gradient, only this time, the ends of it are even more polarized: foragers have a diverse oral microbiome rich with healthy-for-humans bacteria, while people with an American industrialized lifestyle might not have the diversity, but do have a large number of bad-for-humans bacteria.
While many lifestyle factors are dietary or quasi-dietary, e.g. what kinds of foods people eat, whether they drink alcohol, whether they smoke or use gum, etc, many lifestyle factors were examined, including everything from medications and exercise, to things like kitchen location and what fuel is predominantly used, to education and sexual activity and many other things that we don’t have room for here.
You can see how each lifestyle factor stacked up, in Figure 5.
Why it matters
Our oral microbiome affects many aspects of health, including:
- Locally: caries, periodontal diseases, mucosal diseases, oral cancer, and more
- Systemically: gastrointestinal diseases in general, IBS in particular, nervous system diseases, Alzheimer’s disease, endocrine diseases, all manner of immune/autoimmune diseases, and more
Nor are the effects it has mild; oral microbiome health can be a huge factor, statistically, for many of the above. You can see information and data pertaining to all of the above and more, here:
Oral microbiomes: more and more importance in oral cavity and whole body
What to do about it
Take care of your oral microbiome, to help it to take care of you. As well as the above-mentioned lifestyle factors, it’s worth noting that when it comes to oral hygiene, not all oral hygiene products are created equal:
Toothpastes & Mouthwashes: Which Kinds Help, And Which Kinds Harm?
Additionally, you might want to consider gentler options, but if you do, take care to opt for things that science actually backs., rather than things that merely trended on social media.
This writer (hi, it’s me) is particularly excited about the science and use of the miswak stick, which comes from the Saladora persica tree, and has phytochemical properties that (amongst many other health-giving effects) improve the quality of saliva (i.e., improve its pH and microbiome composition). In essence, your own saliva gets biochemically nudged into being the safest, most effective mouthwash.
There’s a lot of science for the use of S. persica, and we’ve discussed it before in more detail than we have room to rehash today, here:
Less Common Oral Hygiene Options
If you’d like to enjoy these benefits (and also have the equivalent of a toothbrush that you can carry with you at all times and does not require water*), then here’s an example product on Amazon 😎
*don’t worry, it won’t feel like dry-brushing your teeth. Remember what we said about what it does to your saliva. Basically, you chomp it once, and your saliva a) increases and b) becomes biological tooth-cleaning fluid. The stick itself is fibrous, so the end of it frays in a way that makes a natural little brush. Each stick is about 5”×¼” and you can carry it in a little carrying case (you’ll get a couple with each pack of miswak sticks), so you can easily use it in, say, the restroom of a restaurant or before your appointment somewhere, just as easily as you could use a toothpick, but with much better results. You may be wondering how long a stick lasts; well, that depends on how much you use it, but in this writer’s experience, each stick lasts about a month maybe, using it at least 2–3 times per day, probably rather more since I use it after each meal/snack and upon awakening.
(the above may read like an ad, but we promise you it’s not sponsored and this writer’s just enthusiastic, and when you read the science, you will be too)
Enjoy!
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Walk Like You’re 20 Years Younger Again
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How fit, healthy, strong, and mobile were you 20 years ago? For most people, the answer is “better than now”. Physiotherapist Dr. Doug Weiss has advice on turning back the clock:
The exercises
If you already have no problems walking, this one is probably not for you. However, if you’re not so able to comfortably walk as you used to be, then Dr. Weiss recommends:
- Pillow squat: putting pillow on a chair, crossing hands on chest, standing up and sitting down. Similar to the very important “getting up off the floor without using your hands” exercise, but easier.
- Wall leaning: standing against a wall with heels 4″ away from it, crossing arms over chest again, and pulling the body off the wall using the muscles in the front of the shin. Note, this means not cheating by using other muscles, leveraging the upper body, pushing off with the buttocks, or anything else like that.
- Stepping forward: well, this certainly is making good on the promise of walking like we did 20 years ago; there sure was a lot of stepping forward involved. More seriously, this is actually about stepping over some object, first with support, and then without.
- Heel raise: is what it sounds like, raising up on toes and back down again; first with support, then without.
- Side stepping: step sideways 2–3 steps in each direction. First with support, then without. Bonus: if your support is your partner, then congratulations, you are now dancing bachata.
For more details (and visual demonstration) of these exercises and more, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like:
4 Tips To Stand Without Using Hands
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Anti-Inflammatory Diet 101 (What to Eat to Fight Inflammation)
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Chronic inflammation is a cause and/or exacerbating factor in very many diseases. Arthritis, diabetes, and heart disease are probably top of the list, but there are lots more where they came from. And, it’s good to avoid those things. So, how to eat to avoid inflammation?
Let food be thy medicine
The key things to keep in mind, the “guiding principles” are to prioritize whole, minimally-processed foods, and enjoy foods with plenty of antioxidants. Getting a healthy balance of omega fatty acids is also important, which for most people means getting more omega-3 and less omega-6.
Shopping list (foods to prioritize) includes:
- fruits and vegetables in a variety of colors (e.g. berries, leafy greens, beats)
- whole grains, going for the most fiber-rich options (e.g. quinoa, brown rice, oats)
- healthy fats (e.g. avocados, nuts, seeds)
- fatty fish (e.g. salmon, mackerel, sardines) ← don’t worry about this if you’re vegetarian/vegan though, as the previous category can already cover it
- herbs and spices (e.g. turmeric, garlic, ginger)
Noping list (foods to avoid) includes:
- refined carbohydrates
- highly processed and/or fried foods
- red meats and/or processed meats (yes, that does mean that organic grass-fed farmers’ pinky-promise-certified holistically-raised beef is also off the menu)
- dairy products, especially if unfermented
For more information on each of these, plus advice on transitioning away from an inflammatory diet, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
How to Prevent (or Reduce) Inflammation
Take care!
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Learn to Age Gracefully
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