How To Grow New Brain Cells (At Any Age)
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How To Grow New Brain Cells (At Any Age)
It was long believed that brain growth could not occur later in life, due to expending our innate stock of pluripotent stem cells. However, this was mostly based on rodent studies.
Rodent studies are often used for brain research, because it’s difficult to find human volunteers willing to have their brains sliced thinly (so that the cells can be viewed under a microscope) at the end of the study.
However, neurobiologist Dr. Maura Boldrini led a team that did a lot of research by means of autopsies on the hippocampi of (previously) healthy individuals ranging in age from 14 to 79.
What she found is that while indeed the younger subjects did predictably have more young brain cells (neural progenitors and immature neurons), even the oldest subject, at the age of 79, had been producing new brain cells up until death.
Read her landmark study: Human Hippocampal Neurogenesis Persists throughout Aging
There was briefly a flurry of news articles about a study by Dr. Shawn Sorrels that refuted this, however, it later came to light that Dr. Sorrels had accidentally destroyed his own evidence during the cell-fixing process—these things happen; it’s just unfortunate the mistake was not picked up until after publication.
A later study by a Dr. Elena Moreno-Jiménez fixed this flaw by using a shorter fixation time for the cell samples they wanted to look at, and found that there were tens of thousands of newly-made brain cells in samples from adults ranging from 43 to 87.
Now, there was still a difference: the samples from the youngest adult had 30% more newly-made braincells than the 87-year-old, but given that previous science thought brain cell generation stopped in childhood, the fact that an 87-year-old was generating new brain cells 30% less quickly than a 43-year-old is hardly much of a criticism!
As an aside: samples from patients with Alzheimer’s also had a 30% reduction in new braincell generation, compared to samples from patients of the same age without Alzheimer’s. But again… Even patients with Alzheimer’s were still growing some new brain cells.
Read it for yourself: Adult hippocampal neurogenesis is abundant in neurologically healthy subjects and drops sharply in patients with Alzheimer’s disease
Practical advice based on this information
Since we can do neurogenesis at any age, but the rate does drop with age (and drops sharply in the case of Alzheimer’s disease), we need to:
Feed your brain. The brain is the most calorie-consuming organ we have, by far, and it’s also made mostly of fat* and water. So, get plenty of healthy fats, and get plenty of water.
*Fun fact: while depictions in fiction (and/or chemically preserved brains) may lead many to believe the brain has a rubbery consistency, the untreated brain being made of mostly fat and water gives it more of a blancmange-like consistency in reality. That thing is delicate and spatters easily. There’s a reason it’s kept cushioned inside the strongest structure of our body, far more protected than anything in our torso.
Exercise. Specifically, exercise that gets your blood pumping. This (as our earlier-featured video today referenced) is one of the biggest things we can do to boost Brain-Derived Neurotrophic Factor, or BDNF.
Here be science: Brain-Derived Neurotrophic Factor, Depression, and Physical Activity: Making the Neuroplastic Connection
However, that’s not the only way to increase BDNF; another is to enjoy a diet rich in polyphenols. These can be found in, for example, berries, tea, coffee, and chocolate. Technically those last two are also botanically berries, but given how we usually consume them, and given how rich they are in polyphenols, they merit a special mention.
See for example: Effects of nutritional interventions on BDNF concentrations in humans: a systematic review
Some supplements can help neuron (re)growth too, so if you haven’t already, you might want to check out our previous main feature on lion’s mane mushroom, a supplement which does exactly that.
For those who like videos, you may also enjoy this TED talk by neuroscientist Dr. Sandrine Thuret:
Prefer text? Click here to read the transcript
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How Are You?
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Answering The Most Difficult Question: How Are You?
Today’s feature is aimed at helping mainly two kinds of people:
- “I have so many emotions that I don’t always know what to do with them”
- “What is an emotion, really? I think I felt one some time ago”
So, if either those describe you and/or a loved one, read on…
Alexithymia
Alexi who? Alexithymia is an umbrella term for various kinds of problems with feeling emotions.
That could be “problems feeling emotions” as in “I am unable to feel emotions” or “problems feeling emotions” as in “feeling these emotions is a problem for me”.
It is most commonly used to refer to “having difficulty identifying and expressing emotions”.
There are a lot of very poor quality pop-science articles out there about it, but here’s a decent one with good examples and minimal sensationalist pathologization:
Alexithymia Might Be the Reason It’s Hard to Label Your Emotions
A somatic start
Because a good level of self-awareness is critical for healthy emotional regulation, let’s start there. We’ll write this in the first person, but you can use it to help a loved one too, just switching to second person:
Simplest level first:
Are my most basic needs met right now? Is this room a good temperature? Am I comfortable dressed the way I am? Am I in good physical health? Am I well-rested? Have I been fed and watered recently? Does my body feel clean? Have I taken any meds I should be taking?
Note: If the answer is “no”, then maybe there’s something you can do to fix that first. If the answer is “no” and also you can’t fix the thing for some reason, then that’s unfortunate, but just recognize it anyway for now. It doesn’t mean the thing in question is necessarily responsible for how you feel, but it’s good to check off this list as a matter of good practice.
Bonus question: it’s cliché, but if applicable… What time of the month is it? Because while hormonal mood swings won’t create moods out of nothing, they sure aren’t irrelevant either and should be listened to too.
Bodyscanning next
What do you feel in each part of your body? Are you clenching your jaw? Are your shoulders tense? Do you have a knot in your stomach? What are your hands doing? How’s your posture? What’s your breathing like? How about your heart? What are your eyes doing?
Your observations at this point should be neutral, by the way. Not “my posture is terrible”, but “my posture is stooped”, etc. Much like in mindfulness meditation, this is a time for observing, not for judging.
Narrowing it down
Now, like a good scientist, you have assembled data. But what does the data mean for your emotions? You may have to conduct some experiments to find out.
Thought experiments: what calls to you? What do you feel like doing? Do you feel like curling up in a ball? Breaking something? Taking a bath? Crying?
Maybe what calls to you, or what you feel like doing, isn’t something that’s possible for you to do. This is often the case with anxiety, for example, and perhaps also guilt. But whatever calls to you, notice it, reflect on it, and if it’s something that your conscious mind considers reasonable and safe for you to do, you can even try doing it.
Your body is trying to help you here, by the way! It will try (and usually succeed) to give you a little dopamine spike when you anticipate doing the thing it wants you to do. Warning: it won’t always be right about what’s best for you, so do still make your own decisions about whether it is a good idea to safely do it.
Practical experiments: whether you have a theory or just a hypothesis (if you have neither make up a hypothesis; that is also what scientists do), you can also test it:
If in the previous step you identified something you’d like to do and are able to safely do it, now is the time to try it. If not…
- Find something that is likely to (safely) tip you into emotional expression, ideally, in a cathartic way. But, whatever you can get is good.
- Music is great for this. What songs (or even non-lyrical musical works) make you sad, happy, angry, energized? Try them.
- Literature and film can be good too, albeit they take more time. Grab that tear-jerker or angsty rage-fest, and see if it feels right.
- Other media, again, can be completely unrelated to the situation at hand, but if it evokes the same emotion, it’ll help you figure out “yes, this is it”.
- It could be a love letter or a tax letter, it could be an outrage-provoking news piece or some nostalgic thing you own.
Ride it out, wherever it takes you (safely)
Feelings feel better felt. It doesn’t always seem that way! But, really, they are.
Emotions, just like physical sensations, are messengers. And when a feeling/sensation is troublesome, one of the best ways to get past it is to first fully listen to it and respond accordingly.
- If your body tells you something, then it’s good to acknowledge that and give it some reassurance by taking some action to appease it.
- If your emotions are telling you something, then it’s good to acknowledge that and similarly take some action to appease it.
There is a reason people feel better after “having a good cry”, or “pounding it out” against a punchbag. Even stress can be dealt with by physically deliberately tensing up and then relaxing that tension, so the body thinks that you had a fight and won and can relax now.
And when someone is in a certain (not happy) mood and takes (sometimes baffling!) actions to stay in that mood rather than “snap out of it”, it’s probably because there’s more feeling to be done before the body feels heard. Hence the “ride it out if you safely can” idea.
How much feeling is too much?
While this is in large part a subjective matter, clinically speaking the key question is generally: is it adversely affecting daily life to the point of being a problem?
For example, if you have to spend half an hour every day actively managing a certain emotion, that’s probably indicative of something unusual, but “unusual” is not inherently pathological. If you’re managing it safely and in a way that doesn’t negatively affect the rest of your life, then that is generally considered fine, unless you feel otherwise about it.
If you do think “I would like to not think/feel this anymore”, then there are tools at your disposal too:
- How To Manage Chronic Stress
- How To Set Anxiety Aside
- How To Stop Revisiting Those Memories
- How To Stay Alive (When You Really Don’t Want To)
Take care!
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From eye exams to blood tests and surgery: how doctors use light to diagnose disease
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This is the next article in our ‘Light and health’ series, where we look at how light affects our physical and mental health in sometimes surprising ways. Read other articles in the series.
You’re not feeling well. You’ve had a pounding headache all week, dizzy spells and have vomited up your past few meals.
You visit your GP to get some answers and sit while they shine a light in your eyes, order a blood test and request some medical imaging.
Everything your GP just did relies on light. These are just some of the optical technologies that have had an enormous impact in how we diagnose disease.
megaflopp/Shutterstock 1. On-the-spot tests
Point-of-care diagnostics allow doctors to test patients on the spot and get answers in minutes, rather than sending samples to a lab for analysis.
The “flashlight” your GP uses to view the inside of your eye (known as an ophthalmoscope) is a great example. This allows doctors to detect abnormal blood flow in the eye, deformations of the cornea (the outermost clear layer of the eye), or swollen optical discs (a round section at the back of the eye where the nerve link to the brain begins). Swollen discs are a sign of elevated pressure inside your head (or in the worst case, a brain tumour) that could be causing your headaches.
The invention of lasers and LEDs has enabled many other miniaturised technologies to be provided at the bedside or clinic rather than in the lab.
Pulse oximetry is a famous example, where a clip attached to your finger reports how well your blood is oxygenated. It does this by measuring the different responses of oxygenated and de-oxygenated blood to different colours of light.
Pulse oximetry is used at hospitals (and sometimes at home) to monitor your respiratory and heart health. In hospitals, it is also a valuable tool for detecting heart defects in babies.
See that clip on the patient’s finger? That’s a pulse oximeter, which relies on light to monitor respiratory and heart health. CGN089/Shutterstock 2. Looking at molecules
Now, back to that blood test. Analysing a small amount of your blood can diagnose many different diseases.
A machine called an automated “full blood count analyser” tests for general markers of your health. This machine directs focused beams of light through blood samples held in small glass tubes. It counts the number of blood cells, determines their specific type, and reports the level of haemoglobin (the protein in red blood cells that distributes oxygen around your body). In minutes, this machine can provide a snapshot of your overall health.
For more specific disease markers, blood serum is separated from the heavier cells by spinning in a rotating instrument called a centrifuge. The serum is then exposed to special chemical stains and enzyme assays that change colour depending on whether specific molecules, which may be the sign of a disease, are present.
These colour changes can’t be detected with the naked eye. However, a light beam from an instrument called a spectrometer can detect tiny amounts of these substances in the blood and determine if the biomarkers for diseases are present, and at what levels.
Light shines through the blood sample and tells us whether biomarkers for disease are present. angellodeco/Shutterstock 3. Medical imaging
Let’s re-visit those medical images your GP ordered. The development of fibre-optic technology, made famous for transforming high-speed digital communications (such as the NBN), allows light to get inside the body. The result? High-resolution optical imaging.
A common example is an endoscope, where fibres with a tiny camera on the end are inserted into the body’s natural openings (such as your mouth or anus) to examine your gut or respiratory tracts.
Surgeons can insert the same technology through tiny cuts to view the inside of the body on a video screen during laparoscopic surgery (also known as keyhole surgery) to diagnose and treat disease.
Doctors can insert this flexible fibre-optic tube with a camera on the end into your body. Eduard Valentinov/Shutterstock How about the future?
Progress in nanotechnology and a better understanding of the interactions of light with our tissues are leading to new light-based tools to help diagnose disease. These include:
- nanomaterials (materials on an extremely small scale, many thousands of times smaller than the width of a human hair). These are being used in next-generation sensors and new diagnostic tests
- wearable optical biosensors the size of your fingernail can be included in devices such as watches, contact lenses or finger wraps. These devices allow non-invasive measurements of sweat, tears and saliva, in real time
- AI tools to analyse how blood serum scatters infrared light. This has allowed researchers to build a comprehensive database of scatter patterns to detect any cancer
- a type of non-invasive imaging called optical coherence tomography for more detailed imaging of the eye, heart and skin
- fibre optic technology to deliver a tiny microscope into the body on the tip of a needle.
So the next time you’re at the GP and they perform (or order) some tests, chances are that at least one of those tests depend on light to help diagnose disease.
Matthew Griffith, Associate Professor and ARC Future Fellow and Director, UniSA Microscopy and Microanalysis Facilities, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Krill Oil vs Fish Oil – Which is Healthier?
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Our Verdict
When comparing krill oil to fish oil, we picked the krill oil.
Why?
Both of these products are good sources of omega-3 fatty acids EPA and DHA, and for the specific brand depicted above, in both cases 2 softgels will give you the recommended daily amount (which is generally held to be 250–500mg combined omega-3s per day).
This brand’s fish oil gives more (640mg combined omega-3s per 2 softgels, to the same brand’s krill oil’s 480mg per 2 softgels), but since the krill oil is already in the high end of RDA territory, the excess beyond the RDA is not helpful, and not a huge factor. More quantity is not always better, when the body can only process so much at a time.
However, the krill oil gives some extra things that the fish oil doesn’t:
- Astaxanthin, a “super-antioxidant”
- and neuroprotectant, heart-healthy phospholipids
Additional considerations
We have declared “the winner” based on health considerations only. That’s a sticking point for us in all our writings; we’ll occasionally look at and mention other factors, but we know that health is what you’re here for, so that’s what we’ll always treat as most critical.
However, in case these factors may interest you and/or influence you to one or the other:
• The fish oil is about 30% cheaper financially
• The krill oil is a lot more sustainable environmentallyBack to the health science…
Read more:
• What Omega-3 Fatty Acids Really Do For Us
• Astaxanthin: Super-Antioxidant & NeuroprotectantWant some? Here for your convenience are some example products on Amazon:
(brands available will vary per region, but now you know what to look out for on the labels!)
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Lifespan vs Healthspan, And The Spice Of Life
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It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
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
❝Great newsletter. Am taking turmeric for inflammation of hips and feet. Works like magic. Would like to know how it works, and what tumeric is best combined with – also whether there any risks in longterm use.❞
Glad you’re enjoying! As for turmeric, it sure is great, isn’t it? To answer your questions in a brief fashion:
- How it works: it does a lot of things, but perhaps its most key feature is its autoxidative metabolites that mediate its anti-inflammatory effect. This, it slows or inhibits oxidative stress that would otherwise cause inflammation, increase cancer risk, and advance aging.
- Best combined with: black pepper
- Any risks in long-term use: there are no known risks in long-term use ← that’s just one study, but there are lots. Some studies were prompted by reported hepatotoxicity of curcumin supplements, but a) the reports themselves seem to be without evidence b) the reported hepatoxicity was in relation to contaminants in the supplements, not the curcumin itself c) clinical trials were unable to find any hepatotoxicity (or other) risks anyway. Here’s an example of such a study.
You might also like our previous main feature: Why Curcumin (Turmeric) Is Worth Its Weight In Gold
❝This push for longevity is appealing but watching my mother in her nineties is a life I’m not looking forward to. Healthy longevity, yes, but longevity for the sake of a longer life? No thank you.❞
Yes, you’re quite right, that’s exactly the point! Assuming we live to die of age-related conditions (i.e., we do not suffer a fatal accident or incident in our younger years), those unfun last years are coming whether they come at 75 or 95. Or earlier or later, because that can absolutely happen too!
For example: nearly 10% of Americans over 65 have difficulty with self-care
As a rule, and we’ve covered some of the science of this previously, having at least 4 out of 5 of the “big 5” lifestyle factors (diet, exercise, sleep, low-or-zero alcohol, not smoking) not only extends life, but specifically extends the healthspan, i.e. the count of healthy life-years that precedes final age-related decline.
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These Top Few Things Make The Biggest Difference To Health
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The Best Few Interventions For The Best Health
Writer’s note: I was going to do something completely different for today (so that can go out another week now), but when reflecting on my own “what should I focus on in the new year?” (in terms of my own personal health goals and such) it occured to me that I should look back on the year’s articles, to take our own advice myself, and see what most important things I should make sure to focus on.
In so doing for myself, it occured to me that you, our subscribers who like condensed information and simple interventions for big positive effects, might also find value in a similar once-over. And so, today’s main feature was born!
Sometimes at 10almonds we talk about “those five things that affect everything”. They are:
- Good diet
- Good exercise
- Good sleep
- Not drinking
- Not smoking
If we were to add a sixth in terms of things that make a huge difference, it would be “manage stress effectively” and a seventh, beyond the scope of our newsletter, would be “don’t be socioeconomically disadvantaged” (e.g. poor, and/or part of some disprivileged minority group).
But as for those five we listed, it still leaves the question: what are the few most effective things we can do to improve them? Where can we invest our time/energy/effort for greatest effect?
Good diet
Best current science consistently recommends the Mediterranean Diet:
The Mediterranean Diet: What Is It Good For?
But it can be tweaked for specific desired health considerations:
Four Ways To Upgrade The Mediterranean Diet
Other most-effective dietary tweaks that impact a lot of other areas of health include looking after your gut health and looking after your blood sugars:
Making Friends With Your Gut (You Can Thank Us Later)
and
“Let Them Eat Cake”, She Said (10 Ways To Balance Blood Sugars)
Good exercise
Most exercise is good, but two of the most beneficial things that are (for most people) easy to implement are walking, and High-Intensity Interval Training:
How To Do HIIT (Without Wrecking Your Body)
Good sleep
This means quality and quantity! We cannot skimp on either and expect good health:
Why You Probably Need More Sleep
and as for quality,
The Head-To-Head Of Google and Apple’s Top Apps For Getting Your Head Down
Not drinking
According to the World Health Organization, the only safe amount of alcohol is zero.
See also:
Can We Drink To Good Health? (e.g. Red Wine & Heart Health)
and
Not smoking
We haven’t done a main feature on this! It’s probably not really necessary, as it’s not very contentious to say “smoking is bad for everything”.
WHO | Tobacco kills up to half its users who don’t quit
However, as a side-note, while cannabis is generally recognised as not as harmful as tobacco-based products, it has some fairly major drawbacks too. For some people, the benefits (e.g. pain relief) may outweigh the risks, though:
Final thoughts
Not sure where to start? We suggest this order of priorities, unless you have a major health condition that makes something else a higher priority:
- If you smoke, stop
- If you drink, reduce, or ideally stop
- Improve your diet
About that diet…
- Worry less about what to exclude, and instead focus on adding more variety of fruit/veg
- See also: Level-Up Your Fiber Intake! (Without Difficulty Or Discomfort)
- That said, if you’re looking for things to cut, sugar is a top candidate (and red meat is in clear second place albeit some way below)
When it comes to exercise, get your 10,000 daily steps in (actually, science says 8,000 steps is fine), and consider adding HIIT per our above article, when you feel like adding that in. As for that about the steps:
When it comes to sleep, if you’re taking care of the above things, and set a regular early wake-up time that you do not deviate from, then this will probably take care of itself, if you don’t have a sleep-inconvenient lifestyle (e.g. shift work, just had a baby, etc) or a sleep disorder.
For further pointers, see: 10 Tips for Better Sleep: Starting In The Morning
Take care!
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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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