Change Your Brain, Change Your Life – by Dr. Daniel G. Amen
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To what extent can we change our brains, and to what extent are we stuck with what we have?
Dr. Amen tells us that being mindful of both ends of this is critical:
- Neuroplasticity means we can, indeed, change our brains
- We do, however, have fundamental “brain types” based on our neurochemistry and physical brain structure
He argues for the use of brain imaging technology to learn more about the latter… In order to better go about doing what we can with the former.
The book looks at how these different brain types can lead to situations where what works as a treatment for one person can often not work for another. It’s also prescriptive, about what sorts of treatments (and lifestyle adjustments) are more likely to do better for each.
Where the book excels is in giving ideas and pointers for exploration… Things to take to one’s doctor, and—for example—request certain tests, and then what to do with those.
Where the book is a little light is on including hard science in the explanations. The hard science is referred to, but is considered beyond the scope of the book, or perhaps beyond the interest of the reader. That’s unfortunate, as we’d have liked to have seen more of it, rather than taking claims at face value without evidence.
Bottom line: this is distinctly “pop science” in presentation, but can give a lot of great ideas for learning more about our own brains and brain health… And then optimizing such.
Click here to check out “Change Your Brain; Change Your Life” on Amazon today!
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Dr. Greger’s Anti-Aging Eight
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Dr. Greger’s Anti-Aging Eight
This is Dr. Michael Greger. We’ve featured him before: Brain Food? The Eyes Have It!
This time, we’re working from his latest book, the excellent “How Not To Age”, which we reviewed all so recently. It is very information-dense, but we’re going to be focussing on one part, his “anti-aging eight”, that is to say, eight interventions he rates the most highly to slow aging in general (other parts of the book pertained to slowing eleven specific pathways of aging, or preserving specific bodily functions against aging, for example).
Without further ado, his “anti-aging eight” are…
- Nuts
- Greens
- Berries
- Xenohormesis & microRNA manipulation
- Prebiotics & postbiotics
- Caloric restriction / IF
- Protein restriction
- NAD+
As you may have noticed, some of these are things might appear already on your grocery shopping list; others don’t seem so “household”. Let’s break them down:
Nuts, greens, berries
These are amongst the most nutrient-dense and phytochemical-useful parts of the diet that Dr. Greger advocates for in his already-famous “Dr. Greger’s Daily Dozen”.
For brevity, we’ll not go into the science of these here, but will advise you: eat a daily portion of nuts, a daily portion of berries, and a couple of daily portions of greens.
Xenohormesis & microRNA manipulation
You might, actually, have these on your grocery shopping list too!
Hormesis, you may recall from previous editions of 10almonds, is about engaging in a small amount of eustress to trigger the body’s self-strengthening response, for example:
Xenohormesis is about getting similar benefits, second-hand.
For example, plants that have been grown to “organic” standards (i.e. without artificial pesticides, herbicides, fertilizers) have had to adapt to their relatively harsher environment by upping their levels of protective polyphenols and other phytochemicals that, as it turns out, are as beneficial to us as they are to the plants:
Hormetic Effects of Phytochemicals on Health and Longevity
Additionally, the flip side of xenohormesis is that some plant compounds can themselves act as a source of hormetic stress that end up bolstering us. For example:
In essence, it’s not just that it has anti-oxidant effect; it also provides a tiny oxidative-stress immunization against serious sources of oxidative stress—and thus, aging.
MicroRNA manipulation is, alas, too complex to truly summarize an entire chapter in a line or two, but it has to do with genetic information from the food that we eat having a beneficial or deleterious effect to our own health:
Diet-derived microRNAs: unicorn or silver bullet?
A couple of quick takeaways (out of very many) from Dr. Greger’s chapter on this is to spring for the better quality olive oil, and skip the cow’s milk:
- Impact of Phenol-Enriched Virgin Olive Oils on the Postprandial Levels of Circulating microRNAs Related to Cardiovascular Disease
- MicroRNA exosomes of pasteurized milk: potential pathogens of Western diseases
Prebiotics & Postbiotics
We’re short on space, so we’ll link you to a previous article, and tell you that it’s important against aging too:
Making Friends With Your Gut (You Can Thank Us Later)
An example of how one of Dr. Greger’s most-recommended postbiotics helps against aging, by the way:
- The mitophagy activator urolithin A is safe and induces a molecular signature of improved mitochondrial and cellular health in humans
- Urolithin A improves muscle strength, exercise performance, and biomarkers of mitochondrial health in a randomized trial in middle-aged adults
(Urolithin can be found in many plants, and especially those containing tannins)
See also: How to Make Urolithin Postbiotics from Tannins
Caloric restriction / Intermittent fasting
This is about lowering metabolic load and promoting cellular apoptosis (programmed cell death; sounds bad; is good) and autophagy (self-consumption; again, sounds bad; is good).
For example, he cites the intermittent fasters’ 46% lower risk of dying in the subsequent years of follow-up in this longitudinal study:
For brevity we’ll link to our previous IF article, but we’ll revisit caloric restriction in a main feature on of these days:
Fasting Without Crashing? We sort the science from the hype!
Dr. Greger favours caloric restriction over intermittent fasting, arguing that it is easier to adhere to and harder to get wrong if one has some confounding factor (e.g. diabetes, or a medication that requires food at certain times, etc). If adhered to healthily, the benefits appear to be comparable for each, though.
Protein restriction
In contrast to our recent main feature Protein vs Sarcopenia, in which that week’s featured expert argued for high protein consumption levels, protein restriction can, on the other hand, have anti-aging effects. A reminder that our body is a complex organism, and sometimes what’s good for one thing is bad for another!
Dr. Greger offers protein restriction as a way to get many of the benefits of caloric restriction, without caloric restriction. He further notes that caloric restriction without protein restriction doesn’t decrease IGF-1 levels (a marker of aging).
However, for FGF21 levels (these are good and we want them higher to stay younger), what matters more than lowering proteins in general is lowering levels of the amino acid methionine—found mostly in animal products, not plants—so the source of the protein matters:
For example, legumes deliver only 5–10% of the methionine that meat does, for the same amount of protein, so that’s a factor to bear in mind.
NAD+
This is about nicotinamide adenine dinucleotide, or NAD+ to its friends.
NAD+ levels decline with age, and that decline is a causal factor in aging, and boosting the levels can slow aging:
Therapeutic Potential of NAD-Boosting Molecules: The In Vivo Evidence
Can we get NAD+ from food? We can, but not in useful quantities or with sufficient bioavailability.
Supplements, then? Dr. Greger finds the evidence for their usefulness lacking, in interventional trials.
How to boost NAD+, then? Dr. Greger prescribes…
Exercise! It boosts levels by 127% (i.e., it more than doubles the levels), based on a modest three-week exercise bike regimen:
Skeletal muscle NAMPT is induced by exercise in humans
Another study on resistance training found the same 127% boost:
Take care!
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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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Three-Bean Chili & Cashew Cream
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A hearty classic with a twist! Delicious and filling and full of protein, fiber, and powerful phytonutrients (including heavy-hitters ergothioneine and lycopene), this recipe is also quite flexible, so you can always add in extra seasonal vegetables if you like (to get you started: cherry tomatoes in summer and sweet potato in fall are fine options)!
You will need
- 1 cup low-sodium vegetable stock (ideally you made it yourself from vegetable offcuts you kept in the freezer for this purpose, but if not, you should be able to find low-sodium stock cubes)
- 1 can kidney beans, drained and rinsed
- 1 can black beans, drained and rinsed
- 1 can chickpeas, drained and rinsed
- 2 cans chopped tomatoes
- 1 onion, finely chopped
- 1 carrot, diced
- 2 celery sticks, chopped
- 4 oz mushrooms, chopped
- ½ bulb garlic, crushed
- 2 tbsp tomato purée
- 1 red chili pepper, finely chopped (multiply per your heat preferences)
- 1 tbsp ground paprika
- 1 tbsp black pepper, coarse ground
- 2 tsp fresh rosemary (or 1 tbsp dried)
- 2 tsp fresh thyme (or 1 tbsp dried)
- 1 tsp ground cumin
- ½ tsp MSG or 1 tsp low-sodium salt
- Extra virgin olive oil
For the cashew cream:
- 6 oz cashews, soaked in kettle-hot water for at least 15 minutes
- 1 tbsp nutritional yeast
- 1 tsp lemon juice
To serve:
- Handful of chopped parsley
- Your carbohydrates of choice; we recommend our Tasty Versatile Rice recipe, and/or our Delicious Quinoa Avocado Bread recipe.
Method
(we suggest you read everything at least once before doing anything)
1) Heat some olive oil in a skillet and fry the onion for about 5 minutes, stirring as necessary.
2) Add the garlic and chili and cook for a further 1 minute.
3) Add the celery, carrot, and mushrooms and continue cooking for 1–2 minutes.
4) Add everything else from the main section, taking care to stir well to distribute the seasonings evenly. Reduce the heat and allow to simmer for around 20 minutes, stirring occasionally.
5) While you are waiting, drain the cashews, and add them to a high-speed blender with ½ cup (fresh) cold water, as well as the nutritional yeast and lemon juice. Blend on full power until smooth; this may take about 3 minutes, so we recommend doing it in 30-second bursts to avoid overheating the motor. You’ll also probably need to scrape it down the sides at least once. You can add a little more water if you want the cream to be thinner than it is appearing, but go slowly if you do.
6) Serve with rice, adding a dollop of the cream and garnishing with parsley, with bread on the side if you like.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- What’s Your Plant Diversity Score?
- Three Daily Servings of Beans?
- Kidney Beans or Black Beans – Which is Healthier?
- What Matters Most For Your Heart?
- “The Longevity Vitamin” (That’s Not A Vitamin)
- Lycopene’s Benefits For The Gut, Heart, Brain, & More
- Our Top 5 Spices: How Much Is Enough For Benefits?
Take care!
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What does it mean to be immunocompromised?
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Our immune systems help us fight off disease, but certain health conditions and medications can weaken our immune systems. People whose immune systems don’t work as well as they should are considered immunocompromised.
Read on to learn more about how the immune system works, what causes people to be immunocompromised, and how we can protect ourselves and the immunocompromised people around us from illness.
What is the immune system?
The immune system is a network of cells, organs, and chemicals that helps our bodies fight off infections caused by invaders, such as bacteria, viruses, fungi, and parasites.
Some important parts of the immune system include:
- White blood cells, which attack and kill germs that don’t belong inside our bodies.
- Lymph nodes, which help our bodies filter out germs.
- Antibodies, which help our bodies recognize invaders.
- Cytokines, which tell our immune cells what to do.
What causes people to be immunocompromised?
Some health conditions and medications can prevent our immune systems from functioning optimally, which makes us more vulnerable to infection. Health conditions that compromise the immune system fall into two categories: primary immunodeficiency and secondary immunodeficiency.
Primary immunodeficiency
People with primary immunodeficiency are born with genetic mutations that prevent their immune systems from functioning as they should. There are hundreds of types of primary immunodeficiencies. Since these mutations affect the immune system to varying degrees, some people may experience symptoms and get diagnosed early in life, while others may not know they’re immunocompromised until adulthood.
Secondary immunodeficiency
Secondary immunodeficiency happens later in life due to an infection like HIV, which weakens the immune system over time, or certain types of cancer, which prevent the body from producing enough white blood cells to adequately fight off infection. Studies have also shown that getting infected with COVID-19 may cause immunodeficiency by reducing our production of “killer T-cells,” which help fight off infections.
Sometimes necessary treatments for certain medical conditions can also cause secondary immunodeficiency. For example, people with autoimmune disorders—which cause the immune system to become overactive and attack healthy cells—may need to take immunosuppressant drugs to manage their symptoms. However, the drugs can make them more vulnerable to infection.
People who receive organ transplants may also need to take immunosuppressant medications for life to prevent their body from rejecting the new organ. (Given the risk of infection, scientists continue to research alternative ways for the immune system to tolerate transplantation.)
Chemotherapy for cancer patients can also cause secondary immunodeficiency because it kills the immune system’s white blood cells as it’s trying to kill cancer cells.
What are the symptoms of a compromised immune system?
People who are immunocompromised may become sick more frequently than others or may experience more severe or longer-term symptoms than others who contract the same disease.
Other symptoms of a compromised immune system may include fatigue; digestive problems like cramping, nausea, and diarrhea; and slow wound healing.
How can I find out if I’m immunocompromised?
If you think you may be immunocompromised, talk to your health care provider about your medical history, your symptoms, and any medications you take. Blood tests can determine whether your immune system is producing adequate proteins and cells to fight off infection.
I’m immunocompromised—how can I protect myself from infection?
If you’re immunocompromised, take precautions to protect yourself from illness.
Wash your hands regularly, wear a well-fitting mask around others to protect against respiratory viruses, and ensure that you’re up to date on recommended vaccines.
Immunocompromised people may need more doses of vaccines than people who are not immunocompromised—including COVID-19 vaccines. Talk to your health care provider about which vaccines you need.
How can I protect the immunocompromised people around me?
You never know who may be immunocompromised. The best way to protect immunocompromised people around you is to avoid spreading illnesses.
If you know you’re sick, isolate whenever possible. Wear a well-fitting mask around others—especially if you know that you’re sick or that you’ve been exposed to germs. Make sure you’re up to date on recommended vaccines, and practice regular hand-washing.
If you’re planning to spend time with someone who is immunocompromised, ask them what steps you can take to keep them safe.
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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28-Day FAST Start Day-by-Day – by Gin Stephens
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We have previously reviewed Gin Stephens’ other book, “Fast. Feast. Repeat.”, so what’s so special about this one that it deserves reviewing too?
This one is all about troubleshooting the pitfalls that many people find when taking up intermittent fasting.
To be clear: the goal here is not a “28 days and yay you did it, put that behind you now”, but rather “28 days and you are now intermittently fasting easily each day and can keep it up without difficulty”. As for the difficulties that may arise early in the 28 days…
Not just issues of willpower, but also the accidental breaks. For example, some artificial sweeteners, while zero-calorie, trigger an insulin response, which breaks the fast on the metabolic level (avoiding that is the whole point of IF). Lots of little tips like that peppered through the book help the reader to stop accidentally self-sabotaging their progress.
The author does talk about psychological issues too, and also how it will feel different at first while the liver is adapting, than later when it has already depleted its glycogen reserves and the body must burn body fat instead. Information like that makes it easier to understand that some initial problems (hunger, getting “hangry”, feeling twitchy, or feeling light-headed) will last only a few weeks and then disappear.
So, understanding things like that makes a big difference too.
The style of the book is simple and clear pop-science, with lots of charts and bullet points and callout-boxes and the like; it makes for very easy reading, and very quick learning of all the salient points, of which there are many.
Bottom line: if you’ve tried intermittent fasting but struggled to make it stick, this book can help you get to where you want to be.
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Non-Sleep Deep Rest: A Neurobiologist’s Take
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How to get many benefits of sleep, while awake!
Today we’re talking about Dr. Andrew Huberman, a neuroscientist and professor in the department of neurobiology at Stanford School of Medicine.
He’s also a popular podcaster, and as his Wikipedia page notes:
❝In episodes lasting several hours, Huberman talks about the state of research in a specific topic, both within and outside his specialty❞
Today, we won’t be taking hours, and we will be taking notes from within his field of specialty (neurobiology). Specifically, in this case:
Non-Sleep Deep Rest (NSDR)
What is it? To quote from his own dedicated site on the topic:
❝What is NSDR (Yoga Nidra)? Non-Sleep Deep Rest, also known as NSDR, is a method of deep relaxation developed by Dr. Andrew Huberman, a neuroscientist at Stanford University School of Medicine.
It’s a process that combines controlled breathing and detailed body scanning to bring you into a state of heightened awareness and profound relaxation. The main purpose of NSDR is to reduce stress, enhance focus, and improve overall well-being.❞
While it seems a bit bold of Dr. Huberman to claim that he developed yoga nidra, it is nevertheless reassuring to get a neurobiologist’s view on this:
How it works, by science
Dr. Huberman says that by monitoring EEG readings during NSDR, we can see how the brain slows down. Measurably!
- It goes from an active beta range of 13–30 Hz (normal waking) to a conscious meditation state of an alpha range of 8–13 Hz.
- However, with practice, it can drop further, into a theta range of 4–8 Hz.
- Ultimately, sustained SSDR practice can get us to 0.5–3 Hz.
This means that the brain is functioning in the delta range, something that typically only occurs during our deepest sleep.
You may be wondering: why is delta lower than theta? That’s not how I remember the Greek alphabet being ordered!
Indeed, while the Greek alphabet goes alpha beta gamma delta epsilon zeta eta theta (and so on), the brainwave frequency bands are:
- Gamma = concentrated focus, >30 Hz
- Beta = normal waking, 13–30 Hz
- Alpha = relaxed state, 8–13 Hz
- Theta = light sleep, 4–8 Hz
- Delta = deep sleep, 1–4 Hz
Source: Sleep Foundation ← with a nice infographic there too
NSDR uses somatic cues to engage our parasympathetic nervous system, which in turn enables us to reach those states. The steps are simple:
- Pick a time and place when you won’t be disturbed
- Lie on your back and make yourself comfortable
- Close your eyes as soon as you wish, and now that you’ve closed them, imagine closing them again. And again.
- Slowly bring your attention to each part of your body in turn, from head to toe. As your attention goes to each part, allow it to relax more.
- If you wish, you can repeat this process for another wave, or even a third.
- Find yourself well-rested!
Note: this engagement of the parasympathetic nervous system and slowing down of brain activity accesses restorative states not normally available while waking, but 10 minutes of NSDR will not replace 7–9 hours of sleep; nor will it give you the vital benefits of REM sleep specifically.
So: it’s an adjunct, not a replacement
Want to try it, but not sure where/how to start?
When you’re ready, let Dr. Huberman himself guide you through it in this shortish (10:49) soundtrack:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to try it, but not right now? Bookmark it for later
Take care!
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