The Science Of Sounds
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We Think You Might Like The Sound Of This…
We’ve written before about the benefits of mindfulness meditation, and how to do it.
We also reviewed a great book on a related topic:
This is Your Brain On Music – by Dr. Daniel Levitin
(yes, that’s the same neuroscientist that we featured as an expert talking about The Five Keys of Aging Healthily)
But what happens when we combine the two?
Mantra meditation & music
Most scientific studies that have been undertaken with regard to meditation tend to focus on mindfulness meditation. It’s easy, effective, and (which makes a difference when it comes to publication bias) is a very safe bet when it comes to funding.
However, today we’re going to look at mantra meditation, which has a lot in common, neurologically speaking, with music. Indeed, when the two were compared separately in a randomized control trial:
❝Daily mantra meditation or classical music listening may be beneficial for cognitive outcomes and quality of life of breast cancer survivors with cancer-related cognitive impairment.
The cognitive benefits appear to be sustained beyond the initial intervention period.❞
One possible reason for some of the similar benefits is the vagus nerve—whether intoning a mantra, or humming along to music, the vibrations can stimulate the vagus nerve, which in turn activates the parasympathetic nervous system, resulting in body-wide relaxation:
The Vagus Nerve (And How You Can Make Use Of It)
How effective is mantra meditation?
According to a large recent narrative review, it depends on your goal:
❝Based on the studies in the four important areas presented, there is no doubt of a strong connection between mantra meditation and human health.
Strong evidence has been found that practicing mantra meditation is effective in relieving stress and in coping with hypertension.
For the other two areas: anxiety and immunity, the evidence is inconclusive or not strong enough to firmly support the claim that the mantra meditation can be used to reduce anxiety or to improve immunity. ❞
Read in full: Scientific Evidence of Health Benefits by Practicing Mantra Meditation: Narrative Review
this is a very interesting read if you do have the time!
How do I practice mantra meditation?
The definition is broad, but the critical criteria are:
- You meditate…
- …using a mantra
Lest that seem flippant: those really are the two key points!
Meditation comes in various forms, and mantra meditation is a form of focussed meditation. While some focussed meditation forms may use a candle or some other focal point, in mantra meditation, the mantra itself provides the focus.
You may be wondering: what should the mantra be?
Classic and well-tested mantras include such simple things as the monosyllabic Sanskrit “Om” or “Ham”. We’re a health science newsletter, so we’ll leave esoteric meanings to other publications as they are beyond our scope, but we will say that these result, most naturally, in the humming sound that we mentioned earlier stimulates the vagus nerve.
But that’s not the only way. Practitioners of religions that have repetitive prayer systems (e.g. anything that uses prayer beads, for example) also provide the basis of focused meditation, using a mantra (in this case, usually a very short oft-repeated prayer phrase).
How long is needed for benefits?
Most studies into mantra meditation have used timed sessions of 15–30 minutes, with 20 minutes being a commonly-used session length, once per day. However…
- Vagus nerve benefits should appear a lot more quickly than that (under 5 minutes) in the case of mantras that cause that vibration we mentioned.
- Repetitive spoken prayers (or similar repeated short phrases, for the irreligious) will generally effect relaxation in whatever period of time it takes for your brain to be fully focused on what you are doing now, instead of what you were thinking about before. If using counting beads, then you probably already know what number works for you.
(again, as a health science publication, we cannot comment on any otherworldly benefits, but the worldly benefits seem reason enough to consider these practices for their potential therapeutic effects)
10almonds tip: for any meditative practice that you want to take approximately a given period of time, we recommend investing in a nice sand timer like this one, as this will not result in a jarring alarm going off!
Like to jazz things up a little?
Enjoy: Meditation That You’ll Actually Enjoy ← Meditation games!
Prefer to keep things to the basics?
Enjoy: No Frills, Evidence-Based Mindfulness ← The simplest scientific approach
Take care!
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Tranquility by Tuesday?
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I Know How She Does It: How Successful Women Make The Most of Their Time
This is Laura Vanderkam, author of “Tranquility By Tuesday” (amongst other books). Her “thing” is spending more time on what’s important, and less on what isn’t. Sounds simple, but she’s made a career out of it, so condensed here for you are…
Laura’s 7 Keys To Productivity
Key One: Plan your weeks on Fridays
You don’t want your Monday morning to be a “James Bond intro” (where everything is already in action and you’re just along for the ride, trying to figure out what’s going on). So, take some time last thing each Friday, to plan ahead for the following week!
Key Two: Measure what matters
Whatever that means to you. Laura tracks her use of time in half-hour blocks, and likes keeping track of streaks. For her, that means running daily and keeping a log of it. She also keeps track of the books she reads. For someone else it could be music practice, or a Duolingo streak, or eating fruit each day.
On which note…
“Dr. Greger’s Daily Dozen” is simpler than most nutrition trackers (where you must search for everything you eat, or scan barcodes for all ingredients).
Instead, it keeps track of whether you are having certain key health-giving foods often enough to maintain good health.
We might feature his method in a future edition of 10almonds, but for now, check the app out for yourself here:
Get Dr. Greger’s Daily Dozen on iOS / Get Dr. Greger’s Daily Dozen on Android
Dr. Greger’s Daily Dozen @ Nutrition Facts
Key Three: Figure out 2–3 “anchor” events for the weekend
Otherwise, it can become a bit of a haze and on Monday you find yourself thinking “where did the weekend go?”. So, plan some stuff! It doesn’t have to be anything out-of-this-world, just something that you can look forward to in advance and remember afterwards. It could be a meal out with your family, or a session doing some gardening, or a romantic night in with your partner. Whatever makes your life “living” and not passing you by!
Key Four: Tackle the toughest work first
You’ve probably heard about “swallowing frogs”. If not, there are various versions, usually attributed to Mark Twain.
Here’s one:
“If it’s your job to eat a frog, it’s best to do it first thing in the morning. And if it’s your job to eat two frogs, it’s best to eat the biggest one first.”
Top Productivity App “ToDoist” has an option for this, by the way!
Laura’s key advice here is: get the hard stuff done now! Before you get distracted or tired and postpone it to tomorrow (and then lather rinse repeat, so it never gets done)
10almonds Tip:
“But what if something’s really important but not as pressing as some less important, but more urgent tasks?”
Simple!
Set a timer (we love the Pomodoro method, by the way) and do one burst of the important-but-not-urgent task first. Then you can get to the more urgent stuff.
Repeat each day until the important-but-not-urgent task is done!
The 10almonds Team
Key Five: Use bits of time well
If, like many of us, you’ve a neverending “to read” list, use the 5–10 minute breaks that get enforced upon us periodically through the day!
- Use those few minutes before a meeting/phonecall!
- Use the time you spend waiting for public transport or riding on it!
- Use the time you spent waiting for a family member to finish doing a thing!
All those 5–10 minute bits soon add up… You might as well spend that time reading something you know will add value to your life, rather than browsing social media, for example.
Key Six: Make very short daily to-do lists
By “short”, Laura considers this “under 10 items”. Do this as the last part of your working day, ready for tomorrow. Not at bedtime! Bedtime is for winding down, not winding up
Key Seven: Have a bedtime
Laura shoots for 10:30pm, but whatever works for you and your morning responsibilities. Your morning responsibilities aren’t tied to a specific time? Lucky you, but try to keep a bedtime anyway. Otherwise, your daily rhythm can end up sliding around the clock, especially if you work from home!
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I’m So Effing Tired – by Dr. Amy Shah
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It’s easy sometimes to feel like we know more or less what we should be doing… If only we had the energy to get going!
- We know we want a better diet… But we don’t have the time/energy to cook so will go for the quickest option even when it’s not the best?
- We know we should exercise… But feel we just need to crash out on the couch for a bit first?
- We would dearly love to get better sleep… But our responsibilities aren’t facilitating that?
…and so on. Happily, Dr. Amy Shah is here with ways to cut through the Gordian Knot that is this otherwise self-perpetuating cycle of exhaustion.
Most of the book is based around tackling what Dr. Shah calls “the energy trifecta“:
- Hormone levels
- Immune system
- Gut health
You’ll note (perhaps with relief) that none of these things require an initial investment of energy that you don’t have… She’s not asking you to hit the gym at 5am, or magically bludgeon your sleep schedule into its proper place, say.
Instead, what she gives is practical, actionable, easy changes that don’t require much effort, to gently slide us back into the fast lane of actually having energy to do stuff!
In short: if you’ve ever felt like you’d like to implement a lot of very common “best practice” lifestyle advice, but just haven’t had the energy to get going, there’s more value in this handbook than in a thousand motivational pep talks.
Click here to check out “I’m So Effing Tired” and get on a better track of life!
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Feel Better In 5 – by Dr. Rangan Chatterjee
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We’ve featured Dr. Rangan Chatterjee before, and here’s a great book of his.
The premise is a realistic twist on a classic, the classic being “such-and-such, in just 5 minutes per day!”
In this case, Dr. Chatterjee offers many lifestyle interventions that each take just 5 minutes, with the idea that you implement 3 of them per day (your choice which and when), and thus gradually build up healthy habits. Of course, once things take as habits, you’ll start adding in more, and before you know it, half your lifestyle has changed for the better.
Which, you may be thinking “my lifestyle’s not that bad”, but if you improve the health outcomes of, say, 20 areas of your life by just a few percent each, you know much better health that adds up to? We’ll give you a clue: it doesn’t add up, it compounds, because each improves the other too, for no part of the body works entirely in isolation.
And Dr. Chatterjee does tackle the body systematically, by the way; interventions for the gut, heart, brain, and so on.
As for what these interventions look like; it is very varied. One might be a physical exercise; another, a mental exercise; another, a “make this health 5-minute thing in the kitchen”, etc, etc.
Bottom line: this is the most supremely easy of easy-ins to healthier living, whatever your starting point—because even if you’re doing half of these interventions, chances are you aren’t doing the other half, and the idea is to pick and choose how and when you adopt them in any case, just picking three 5-minute interventions each day with no restrictions. In short, a lot of value to had here when it comes to real changes to one’s serious measurable health.
Click here to check out Feel Better In 5, and indeed feel better in 5!
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Grain Brain – by Dr. David Perlmutter
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If you’re a regular 10almonds reader, you probably know that refined flour, and processed food in general, is not great for the health. So, what does this book offer more?
Dr. Perlmutter sets out the case against (as the subtitle suggests) wheat, carbs, and sugar. Yes, including wholegrain wheat, and including starchy vegetables such as potatoes and parsnips. Fruit does also come under scrutiny, a clear distinction is made between whole fruits and juices. In the latter case, the lack of fiber (along with the more readily absorbable liquid state) allows for those sugars to zip straight into our blood.
The book includes lots of stats and facts, and many study citations, along with infographics and clear explanations.
If the book has a weakness, it’s when it forgets to clarify something that was obvious to the author. For example, when he talks about our ancestors’ diets being 75% fat and 5% carbs, he neglects to mention that this is 75% by calorie count, not by mass or volume. This makes a huge difference! It’s the difference between a fat-guzzling engine, and someone who eats mostly fruit and oily nuts but also some very high-fat meat/organs.
The book’s strengths, on the other hand, are found in its explanation, backed by good science, of what wheat, along with excessive carbohydrates (especially sugar) can do to our body, including (and most focusedly, hence the title) our brain, leading the way to not just obvious metabolic disorders like diabetes, but also inflammatory diseases like Alzheimer’s.
Bottom line: you don’t have to completely revamp your diet if it’s working for you, but data is data, and this book has lots, making it well-worth a read.
Click here to check out Grain Brain, and learn about how to avoid inflaming yours!
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Debunking the vitamin D fad
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Throughout the pandemic, many unproven miracle COVID-19 “cures” emerged, and vitamin D claims have been one of the most persistent. This is not new for the vitamin. It’s been touted in recent decades as a way to “boost” the immune system, improve overall health, prevent a host of diseases, and allegedly even substitute for vaccines.
But as with many internet-popular health “remedies,” the reality is far less flashy and far more nuanced.
What is vitamin D, and why is it important?
Vitamin D is a nutrient that helps the body absorb calcium, which is essential for bone health. In the sunlight, your skin naturally produces vitamin D that is then stored in fat cells until it is used.
The skin pigment melanin absorbs the UV rays necessary for vitamin D production, meaning that more highly pigmented or darker skin produces less vitamin D than lighter skin with the same amount of sun exposure. Thus, people with darker skin are at higher risk of vitamin D deficiency.
Most of our vitamin D comes from the sun. An additional 10 percent to 20 percent of our vitamin D comes from foods like fatty fish (such as salmon), eggs, and mushrooms. Vitamin D supplements are another source of the nutrient for people who are unable to get enough from sun exposure and diet.
Vitamin D deficiency is real, but there’s no epidemic
Some people who promote vitamin D supplements claim that vitamin D deficiency is an epidemic causing widespread health issues. There is little evidence to support this claim. A 2022 analysis of 2001-2018 data found that 2.6 percent of people in the U.S. had severe vitamin D deficiency.
Severe vitamin D deficiency can cause serious health issues, such as muscle weakness, bone loss in adults, and rickets (weak bones) in children. Some people are at higher risk for the deficiency, including individuals with certain disorders that prevent the body from absorbing or processing vitamin D or those with a family history of vitamin D deficiency.
Black Americans have the highest rates of severe vitamin D deficiency at nearly 12 percent. Severe vitamin D deficiency is also slightly higher in the U.S. during the winter when people get less sun exposure. Rates of moderate vitamin D deficiency are higher at 22 percent overall and are highest among Black Americans (49 percent) and Mexican Americans (35 percent).
Although severe vitamin D deficiency exists in the U.S., it is far from common. Most tellingly, conditions that are directly linked to vitamin D deficiency are not widespread. There is no epidemic of rickets, for example, or bone loss in adults.
There’s little evidence that vitamin D supplements improve overall health
Vitamin D supplements have clear, proven positive effects for people with vitamin D deficiency. Other health benefits of vitamin D supplements are less certain.
There is some evidence that the supplement may reduce the risk of fracture in adults with osteoporosis, a condition that causes weak, fragile bones. However, the benefit appears to be limited to people who have low vitamin D levels. In adults with normal vitamin D levels, supplements have no effect on fracture risk.
The largest randomized controlled trial of vitamin D, called VITAL, investigated the effects of vitamin D supplementation in people without an existing deficiency. The study found that vitamin D supplements had no effects on the risk of cancer, diabetes, or cardiovascular disease, including heart attack and stroke. The study concluded that more research is necessary to determine who may benefit from vitamin D supplements.
Independent analyses found that vitamin D supplementation may be associated with a long-term decrease in cancer mortality, but results are mixed and also require more investigation.
A 2021 analysis of past vitamin D trials found no overall health benefits from vitamin D supplements in people with normal vitamin D levels. Most large-scale studies have found no link between vitamin D supplements and lower all-cause mortality (deaths from any cause), except in older adults and those with vitamin D deficiency.
Vitamin D provides modest protection against respiratory infections
Vitamin D is important for immune function, but this is often misconstrued as vitamin D “boosting” the immune system.
Some people falsely believe that taking vitamin D supplements will keep them healthy and prevent infections like the flu or COVID-19. In reality, clinical trials and large-scale studies of vitamin D have found only minimal protective effects against respiratory infections.
A 2021 analysis of 46 trials found that 61.3 percent of participants who took daily vitamin D supplements got respiratory infections during the study periods—compared to 62.3 percent of people who did not take the supplements. A 2024 meta-analysis of 43 trials found no overall protective effect against respiratory infections, but it detected a slight decrease in risk among people who took specific doses daily.
In young children, there is some evidence that vitamin D supplementation may reduce the length of respiratory infections. However, it does not affect the number or severity of infections that children have.
Despite claims that taking vitamin D can protect against COVID-19, two clinical trials found that taking daily vitamin D supplements did not reduce the risk or severity of COVID-19 infections, even at high doses.
Context is key when considering vitamin D’s benefits
None of these studies contradict the well-established evidence that people with vitamin D deficiency benefit from vitamin D supplements. But it’s important to remember that many of the most popular health claims about vitamin D’s benefits are based on research in people with vitamin D deficiency.
Research in vitamin D-deficient populations is important, but it tells us little about how vitamin D will affect people with normal or close to normal vitamin D levels. A closer look at vitamin D research in people without low levels reveals little evidence to support the idea that the general population benefits from taking vitamin D supplements.
For more information, or to learn about your vitamin D levels, 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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Broccoli vs Cabbage – Which is Healthier?
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Our Verdict
When comparing broccoli to cabbage, we picked the broccoli.
Why?
Here we go once again pitting two different cultivars of the same species (Brassica oleracea) against each other, and/but once again, there is one that comes out as nutritionally best.
In terms of macros, broccoli has more protein, carbs, and fiber, while they are both low glycemic index foods. The differences are small though, so it’s fairest to call this category a tie.
When it comes to vitamins, broccoli has more of vitamins A, B1, B2, B3, B5, B6, B7, B9, C, E, K, and choline, while cabbage is not higher in any vitamins. It should be noted that cabbage is still good for these, especially vitamins C and K, but broccoli is simply better.
In the category of minerals, broccoli has more calcium, copper, iron, magnesium, manganese, phosphorus, potassium, selenium, and zinc, while cabbage is not higher in any minerals. Again though, cabbage is still good, especially in calcium, iron, and manganese, but again, broccoli is simply better.
Of course, enjoy either or both! But if you want the nutritionally densest option, it’s broccoli.
Want to learn more?
You might like to read:
What’s Your Plant Diversity Score?
Take care!
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