This Week In Brain News
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While reading this week’s health news, we’ve singled out three brain-related articles to feature here:
Bad breath now, bad brain later?
Researchers found links between oral microbiome populations, and changes in brain function with aging. The short version is indeed “bad breath now = bad brain later”, but more specifically:
- People who had large numbers of the bacteria groups Neisseria and Haemophilus had better memory, attention and ability to do complex tasks
- People who had higher levels of Porphyromonas had more memory problems later
- People with a lot of Prevotella tended to predict poorer brain health and was more common in people who carry the Alzheimer’s Disease risk gene, APOE4.
If you’ve never heard of half of those, don’t worry: mostly your oral microbiome can take care of itself, provide you consistently do the things that create a “good” oral microbiome. So, see our “related” link below:
Read in full: Mouth bacteria may hold insight into your future brain function
Related: Improve Your Oral Microbiome
Weeding out a major cause of cognitive decline
Cannabis may be great for relaxation, but regular use is not great for mental sharpness, and recent use (even if not regular, and even if currently sober) shows a similar dip in cognitive abilities, especially working memory. In other words, cannabis use for relaxation should be at most an occasional thing, rather than an everyday thing.
While the results of the study are probably not shocking, something that we found interesting was their classification system:
❝Heavy users are considered young adults who’ve used cannabis more than 1000 times over their lifetime. Whereas, using 10 to 999 times was considered a moderate user, and fewer than 10 times was considered a non-user.❞
Which—while being descriptive rather than prescriptive in nature—suggests that, to be on the healthy end of the bell curve, an occasional cannabis-user might want to consider “if you have 999 uses before you hit the “heavy user” category, project those 999 uses against your life expectancy, and moderate your use accordingly”. In other words, a person just now starting use, who expects to live another 40 years, would calculate: 999/40 = 24.9 uses per year, so call it 2 per month. A person who only expects to live another 20 years, would do the same math and arrive at 4 per month.
Disclaimer: the above is intended as an interesting reframe, and a way of looking at long-term cannabis use while being mindful of the risks. It is not intended as advice. This health-conscious writer personally has no intention of using at all, unless perhaps in some bad future scenario in which I have bad chronic pain, I might consider that pain relief effects may be worth the downsides. Or I might not; I hope not to be in the situation to find out!
Read in full: Largest study ever done on cannabis and brain function finds impact on working memory
Related: Cannabis Myths vs Reality
Mind-reading technology improves again
We’ve come quite a way from simple 1/0 reads, and basic cursor control! Now, researchers have created a brain decode that can translate a person’s thoughts into continuous text, without requiring the person to focus on words—in other words, it verbalizes the ideas directly. Most recently, the latest upgrade means that while previously, the device had to be trained on an individual brain for many hours, now the training/calibration process takes only an hour:
Read in full: Improved brain decoder holds promise for communication in people with aphasia
Related: Are Brain Chips Safe?
Take care!
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Nonverbal Epiphany – by Dr. Stephen Furlich
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The subtitle of this book, “Steps To Improve Your Nonverbal Communication” suggests that this is principally an instructional book—it’s not. Rather, it’s mostly informational, and it is left to the reader to interpret what to do with that information.
But, what a lot of information!
And well-sourced, too: this book has scientific paper citations at a rate of one or two per page, with many diagrams and infographics too. It is, in effect, a treasure trove of physiological, psychological, and sociological data when it comes to nonverbal communication and the various factors that influence it.
So, what can you hope to gain from this book? A lot of sorting out of science vs suppositions, mostly.
From digit ratios to crossed arms, from eye-contact to attire, do things really mean what we’ve been told they mean?
And if they don’t, will people perceive them that way anyway, or will textbook rules go out the window in a real conversation? How about in real nonverbal interactions?
(What’s a nonverbal interaction? It’s the behavior exhibited between strangers in the street, it’s the impression given and received by your profile picture, things like that).
Bottom line is that this book is data, data, and more data. If ever you wanted to sort the psychology from the pseudoscience, this is the book for you.
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Butter vs Margarine
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Butter vs Margarine
Yesterday, we asked you for your (health-related) opinion on butter vs margarine, and got the above-depicted, below-described, set of responses:
- A little over 60% said butter is a health food and margarine is basically plastic with trans fats
- A little over 20% said that both are woeful and it’s better to avoid both
- A little over 10% said that margarine is a lighter option, and butter is a fast track to cardiovascular disease.
Comments included (we will summarize/paraphrase, for space):
- “…in moderation, though”
- “I’m vegan so I use vegan butter but I know it’s not great, so I use it sparingly”
- “butter is healthy if and only if it’s grass-fed”
- “margarine has unpronounceable ingredients”
To address those quickly:
- “…in moderation” is a stipulation with which one can rarely go too far wrong
- Same! Speaking for myself (your writer here, hi) and not for the company
- Grass-fed is indeed better; alas that so little of it is grass-fed, in the US!
- Butter contains eicosatrienoic acid, linolelaidic acid, and more*. Sometimes big words don’t mean that something is worse for the health, though!
So, what does the science say?
Butter is a health food: True or False?
True or False, depending on amount! Moderation is definitely key, but we’ll return to that (and why not to have more than a small amount of butter) later. But it is a rich source of many nutrients, iff it’s grass-fed, anyway.
The nutritional profile of something isn’t a thing that’s too contentious, so rather than take too much time on it, in this case we’ll point you back up to the scientific paper we linked above, or if you prefer a pop-science rendering, here’s a nice quick rundown:
7 Reasons to Switch to Grass-Fed Butter
Margarine is basically plastic with trans fats: True or False?
False and usually False now, respectively, contingently.
On the first part: chemically, it’s simply not “basically plastic” and everything in it is digestible
On the second part: it depends on the margarine, and here’s where it pays to read labels. Historically, margarines all used to be high in trans fats (which are indeed woeful for the health). Nowadays, since trans fats have such a (well-earned) bad press, there are increasingly many margarines with low (or no) trans fats, and depending on your country, it may be that all margarines no longer have such:
❝It’s a public health success story. Consumers no longer have to worry about reading product nutritional labels to see if they contain hydrogenated oils and trans fats. They can just know that they no longer do❞
Source: Margarines now nutritionally better than butter after hydrogenated oil ban
So this is one where the science is clear (trans fats are unequivocally bad), but the consumer information is not always (it may be necessary to read labels, to know whether a margarine is conforming to the new guidelines).
Butter is a fast track to cardiovascular disease: True or False?
True or False depending on amount. In moderation, predictably it’s not a big deal.
But for example, the World Health Organization recommends that saturated fats (of which butter is a generous source) make up no more than 10% of our calorie intake:
Source: Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline
So if you have a 2000 kcal daily intake, that would mean consuming not more than 200 kcal from butter, which is approximately two tablespoons.
If you’d like a deeper look into the complexities of saturated fats (for and against), you might like our previous main feature specifically about such:
Can Saturated Fats Be Healthy?
Enjoy!
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Tempeh vs Tofu – Which is Healthier?
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Our Verdict
When comparing tempeh to tofu, we picked the tempeh.
Why?
Per 100g, tempeh has about 1.5x as many calories, about 2x as much protein, about 3x as much fiber, and about 4x the carbohydrates.
Which latter sounds like a lot, but really, the amounts here are small—tempeh is under 12% carbohydrates, and most of that is treated by the body as fiber (e.g. it’s a resistant starch).
Both have no sugar, and both have more or less the same (tiny) amount of fat.
Micronutrients, you ask? As they’re both made from soybeans, the micronutrient profiles are similar, but exact amounts will depend on the method used, so by all means check labels if comparing products in store. By and large, there’s usually not much difference, though.
You can see sample stats here:
In summary
Both are great, and/but tempeh is the more nutrient-dense of the two.
Therefore, tempeh is the healthier option, unless you are on a very strictly calorie-controlled diet, in which case, tofu will give you more quantity per calorie.
Enjoy!
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Antibiotics? Think Thrice
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Antibiotics: Useful Even Less Often Than Previously Believed (And Still Just As Dangerous)
You probably already know that antibiotics shouldn’t be taken unless absolutely necessary. Not only does taking antibiotics frivolously increase antibiotic resistance (which is bad, and kills people), but also…
It’s entirely possible for the antibiotics to not only not help, but instead wipe out your gut’s “good bacteria” that were keeping other things in check.
Those “other things” can include fungi like Candida albicans.
Candida, which we all have in us to some degree, feeds on sugar (including the sugar formed from breaking down alcohol, by the way) and refined carbs. Then it grows, and puts its roots through your intestinal walls, linking with your neural system. Then it makes you crave the very things that will feed it and allow it to put bigger holes in your intestinal walls.
Don’t believe us? Read: Candida albicans-Induced Epithelial Damage Mediates Translocation through Intestinal Barriers
(That’s scientist-speak for “Candida puts holes in your intestines, and stuff can then go through those holes”)
And as for how that comes about, it’s like we said:
See also: Candida albicans as a commensal and opportunistic pathogen in the intestine
That’s not all…
And that’s just C. albicans, never mind things like C. diff. that can just outright kill you easily.
We don’t have room to go into everything here, but you might like to check out:
Four Ways Antibiotics Can Kill You
It gets worse (now comes the new news)
So, what are antibiotics good for? Surely, for clearing up chesty coughs, lower respiratory tract infections, right? It’s certainly one of the two things that antibiotics are most well-known for being good at and often necessary for (the other being preventing/treating sepsis, for example in serious and messy wounds).
But wait…
A large, nationwide (US) observational study of people who sought treatment in primary or urgent care settings for lower respiratory tract infections found…
(drumroll please)
…the use of antibiotics provided no measurable impact on the severity or duration of coughs even if a bacterial infection was present.
Read for yourself:
And in the words of the lead author of that study,
❝Lower respiratory tract infections tend to have the potential to be more dangerous, since about 3% to 5% of these patients have pneumonia. But not everyone has easy access at an initial visit to an X-ray, which may be the reason clinicians still give antibiotics without any other evidence of a bacterial infection.❞
So, what’s to be done about this? On a large scale, Dr. Merenstein recommends:
❝Serious cough symptoms and how to treat them properly needs to be studied more, perhaps in a randomized clinical trial as this study was observational and there haven’t been any randomized trials looking at this issue since about 2012.❞
This does remind us that, while not a RCT, there is a good ongoing observational study that everyone with a smartphone can participate in:
Dr. Peter Small’s medical AI: “The Cough Doctor”
In the meantime, he advises that when COVID and SARS have been ruled out, then “basic symptom-relieving medications plus time brings a resolution to most people’s infections”.
You can read a lot more detail here:
Antibiotics aren’t effective for most lower tract respiratory infections
In summary…
Sometimes, antibiotics really are a necessary and life-saving medication. But most of the time they’re not, and given their great potential for harm, they may be best simultaneously viewed as the very dangerous threat they also are, and used only when those “heavy guns” are truly what’s required.
Take care!
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Beyond Guarding Against Dementia
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When Age’s Brain-Changes Come Knocking
This is Dr. Amy Friday. She’s a psychologist, specializing in geropsychology and neuropsychological assessments.
In other words, she helps people optimize their aging experience, particularly in the context of brain changes as we get older.
What does she want us to know?
First: be not afraid
Ominous first words, but the fact is, there’s a lot to find scary about the prospect of memory loss, dementia, and death.
However, as she points out:
- Death will come for us all sooner or later, barring technology as yet unknown
- Dementia can be avoided, or at least stalled, or at least worked around
- Memory loss, as per the above, can be avoided/stalled/managed
We’ve written a little on these topics too:
…or if the death is not yours:
As for avoiding dementia, the below-linked feature is about Alzheimer’s in particular (which accounts for more than half of all cases of dementia), but the advice goes for most of the other kinds too:
How To Reduce Your Alzheimer’s Risk
And finally, about memory loss specifically:
How To Boost Your Memory Immediately (Without Supplements)
this one is especially about cementing into one’s brain the kinds of memories that people most fear losing with age. People don’t worry about forgetting their PIN codes; they worry about forgetting their cherished memories with loved ones. So, if that’s important to you, do consider checking out this one!
What is that about managing or working around the symptoms?
If we’re missing a limb, we (usually) get a prosthetic, and/or learn how to operate without that limb.
If we’re missing sight or hearing, partially or fully, there are disability aids for those kinds of things too (glasses are a disability aid! Something being very common does not make it not a disability; you literally have less of an ability—in this case, the ability to see), and/or we learn how to operate with our different (or missing) sense.
Dr. Friday makes the case for this being the same with memory loss, dementia, and other age-related symptoms (reduced focus, increased mental fatigue, etc):
❝We are all screwed up. Here’s my flavor … what’s yours? This is a favorite saying of mine, because we ARE all screwed up in one way or another, and when we acknowledge it we can feel closer in our screwed-up-edness.
We are all experiencing “normal aging,” so that tip-of-the-tongue phenomenon that starts in our thirties and slowly gets worse is REAL. But what if you’re having more problems than normal aging? Is it time to throw in the towel and hide? I’m hoping that there is a group of people who say HELL NO to that idea.
Let’s use lessons from research and clinical practice to help all of us work around our weaknesses, and capitalize on our strengths. ❞
Examples of this might include:
- Writing down the things most important to you (a short list of information and/or statements that you feel define you and what matters most to you), so that you can read it later
- Making sure you have support (partner, family, friends, etc) who are on the same page about this topic—and thus will actually support you and advocate for you, instead of arguing about what is in your best interest without consulting you.
- Labelling stuff around the house, so that you get less confused about what is what and where it is
- Having a named go-to advocate that you can call / ask to be called, if you are in trouble somewhere and need help that you can rely on
- Getting a specialized, simpler bank account; hiring an accountant if relevant and practicable.
The thing is, we all want to keep control. Sometimes we can do that! Sometimes we can’t, and if we’re going to lose some aspect of control, it’ll generally go a lot better if we do it on our own terms, so that we ourselves can look out for future-us in our planning.
Want to know more?
You might enjoy her blog, which includes also links to her many videos on the topic, including such items as:
- Neuroplasticity – #1 Way To Increase Brain Health
- Which Diet PREVENTS Alzheimer’s? | Best Brain Health Diet
- Stop Anxiety About Dementia & Do I Have Dementia?
For the rest, see:
This Beautiful Brain | The Science Of Brain Health
Enjoy!
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The Snooze-Button Controversy
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To Snooze Or Not To Snooze? (Science Has Answers)
This is Dr. Jennifer Kanaan. She’s a medical doctor with a focus on pulmonary critical care, sleep disorders, and sleep medicine.
What does she want to tell us?
She wants us to be wary of the many news articles that have jumped on a certain recent sleep study, such as:
- Is hitting the snooze button really a bad idea? Study sheds light on the impact of morning alarms on sleep and cognition
- Hitting Snooze May Help You Feel Less Sleepy and More Alert, Research Says
- Is it okay to press the snooze button?
- Hitting Snooze May Help You Feel Less Sleepy and More Alert, Research Says
- Hitting the snooze button on your alarm doesn’t make you more tired
For the curious, here is the paper itself, by Dr. Tina Sundelin et al. It’s actually two studies, by the way, but one paper:
The authors of this study concluded:
❝There were no clear effects of snoozing on the cortisol awakening response, morning sleepiness, mood, or overnight sleep architecture.
A brief snooze period may thus help alleviate sleep inertia, without substantially disturbing sleep, for late chronotypes and those with morning drowsiness.❞
Notably, people tend to snooze because an alarm clock will, if not “smart” about it, wake us up mid sleep-cycle more often than not, and that will produce a short “sleep hangover”. By snoozing, we are basically re-rolling the dice on being woken up between sleep cycles, and thus feeling more refreshed.
What’s Dr. Kanaan’s counterpoint?
Dr. Kanaan says:
❝If you’re coming in and out of sleep for 30 minutes, after the alarm goes off the first time, you’re costing yourself 30 minutes of uninterrupted, quality, restorative sleep. This study doesn’t change that fact.❞
She advises that rather than snoozing, we should prioritize getting good sleep in the first place, and once we do wake up, mid sleep-cycle or not, get sunlight. That way, our brain will start promptly scrubbing melatonin and producing the appropriate wakefulness hormones instead. That means serotonin, and also a spike of cortisol.
Remember: cortisol is only bad when it’s chronically elevated. It’s fine, and even beneficial, to have a short spike of cortisol. We make it for a reason!
If you’d like to hear more from Dr. Kanaan, you might like this interview with her at the University of Connecticut:
Want the best of both worlds?
A great option to avoid getting woken in the middle of a sleep cycle, and also not needing to hit snooze, is a sunrise alarm clock. Specifics of these devices vary, but for example, the kind this writer has starts gently glowing an hour before the set alarm time,and gradually gets brighter and lighter over the course of the hour.
We don’t sell them, but here’s an example sunrise alarm clock on Amazon, for your convenience
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