Astaxanthin: Super-Antioxidant & Neuroprotectant
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Think Pink For Brain Health!
Astaxanthin is a carotenoid that’s found in:
- certain marine microalgae
- tiny crustaceans that eat the algae
- fish (and flamingos!) that eat the crustaceans
Yes, it’s the one that makes things pink.
But it does a lot more than that…
Super-antioxidant
Move over, green tea! Astaxanthin has higher antioxidant activity than most carotenoids. For example, it is 2–5 times more effective than alpha-carotene, lutein, beta-carotene, and lycopene:
Antioxidant activities of astaxanthin and related carotenoids
We can’t claim credit for naming it a super-antioxidant though, because:
Astaxanthin: A super antioxidant from microalgae and its therapeutic potential
Grow new brain cells
Axtaxanthin is a neuroprotectant, but that’s to be expected from something with such a powerful antioxidant ability.
What’s more special to astaxanthin is that it assists continued adult neurogenesis (creation of new brain cells):
❝The unique chemical structure of astaxanthin enables it to cross the blood-brain barrier and easily reach the brain, where it may positively influence adult neurogenesis.
Furthermore, astaxanthin appears to modulate neuroinflammation by suppressing the NF-κB pathway, reducing the production of pro-inflammatory cytokines, and limiting neuroinflammation associated with aging and chronic microglial activation.
By modulating these pathways, along with its potent antioxidant properties, astaxanthin may contribute to the restoration of a healthy neurogenic microenvironment, thereby preserving the activity of neurogenic niches during both normal and pathological aging. ❞
That first part is very important, by the way! There are so many things that our brain needs, and we can eat, but the molecules are unable to pass the blood-brain barrier, meaning they either get wasted, or used elsewhere, or dismantled for their constituent parts. In this case, it zips straight into the brain instead.
See also:
How To Grow New Brain Cells (At Any Age)
(Probably) good for the joints, too
First, astaxanthin got a glowing report in a study we knew not to trust blindly:
…and breathe. What a title that was! But, did you catch why it’s not to be trusted blindly? It was down at the bottom…
❝Conflict of interest statement
NOVAREX Co., Ltd. funded the study. Valensa International provided the FlexPro MD® ingredients, and NOVAREX Co., Ltd. encapsulated the test products (e.g., both FlexPro MD® and placebo)❞
Studies where a supplement company funded the study are not necessarily corrupt, but they can certainly sway publication bias, i.e. the company funds a bunch of studies and then pulls funding from the ones that aren’t going the way it wants.
So instead let’s look at:
Astaxanthin attenuates joint inflammation induced by monosodium urate crystals
and
Astaxanthin ameliorates cartilage damage in experimental osteoarthritis
…which had no such conflicts of interest.
They agree that astaxanthin indeed does the things (attenuates joint inflammation & ameliorates cartilage damage).
However, they are animal studies (rats), so we’d like to see studies with humans to be able to say for sure how much it helps these things.
Summary of benefits
Based on the available research, astaxanthin…
- is indeed a super-antioxidant
- is a neuroprotective agent
- also assists adult neurogenesis
- is probablygood for joints too
How much do I take, and is it safe?
A 2019 safety review concluded:
❝Recommended or approved doses varied in different countries and ranged between 2 and 24 mg.
We reviewed 87 human studies, none of which found safety concerns with natural astaxanthin supplementation, 35 with doses ≥12 mg/day.❞
Source: Astaxanthin: How much is too much? A safety review
In short: for most people, it’s very safe and well-tolerated. If you consume it to an extreme, you will likely turn pink, much as you would turn orange if you did the same thing with carrots. But aside from that, the risks appear to be minimal.
However! If you have a seafood allergy, please take care to get a supplement that’s made from microalgae, not one that’s made from krill or other crustaceans, or from other creatures that eat those.
Where can I get it?
We don’t sell it, but here’s an example product on Amazon, for your convenience
Enjoy!
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Rebalancing Dopamine (Without “Dopamine Fasting”)
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Rebalancing Dopamine (Without “Dopamine Fasting”)
Credit Steve Fisch This is Dr. Anna Lembke. She’s a professor of psychiatry at Stanford, and chief of the Stanford Addiction Medicine Dual Diagnosis Clinic—as well as running her own clinical practice, and serving on the board of an array of state and national addiction-focused organizations.
Today we’re going to look at her work on dopamine management…
Getting off the hedonic treadmill
For any unfamiliar with the term, the “hedonic treadmill” is what happens when we seek pleasure, enjoy the pleasure, the pleasure becomes normalized, and now we need to seek a stronger pleasure to get above our new baseline.
In other words, much like running on a reciprocal treadmill that just gets faster the faster we run.
What Dr. Lembke wants us to know here: pleasure invariably leads to pain
This is not because of some sort of extrinsic moral mandate, nor even in the Buddhist sense. Rather, it is biology.
Pleasure and pain are processed by the same part of the brain, and if we up one, the other will be upped accordingly, to try to keep a balance.
Consequently, if we recklessly seek “highs”, we’re going to hit “lows” soon enough. Whether that’s by drugs, sex, or just dopaminergic habits like social media overuse.
Dr. Lembke’s own poison of choice was trashy romance novels, by the way. But she soon found she needed more, and more, and the same level wasn’t “doing it” for her anymore.
So, should we just give up our pleasures, and do a “dopamine fast”?
Not so fast!
It depends on what they are. Dopamine fasting, per se, does not work. We wrote about this previously:
Short On Dopamine? Science Has The Answer
However, when it comes to our dopaminergic habits, a short period (say, a couple of weeks) of absence of that particular thing can help us re-find our balance, and also, find insight.
Lest that latter sound wishy-washy: this is about realizing how bad an overuse of some dopaminergic activity had become, the better to appreciate it responsibly, going forwards.
So in other words, if your poison is, as in Dr. Lembke’s case, trashy romance novels, you would abstain from them for a couple of weeks, while continuing to enjoy the other pleasures in life uninterrupted.
Substances that create a dependency are a special case
There’s often a popular differentiation between physical addictions (e.g. alcohol) and behavioral addictions (e.g. video games). And that’s fair; physiologically speaking, those may both involve dopamine responses, but are otherwise quite different.
However, there are some substances that are physical addictions that do not create a physical dependence (e.g. sugar), and there are substances that create a physical dependence without being addictive (e.g. many antidepressants)
See also: Addiction and physical dependence are not the same thing
In the case of anything that has created a physical dependence, Dr. Lembke does not recommend trying to go “cold turkey” on that without medical advice and supervision.
Going on the counterattack
Remember what we said about pleasure and pain being processed in the same part of the brain, and each rising to meet the other?
While this mean that seeking pleasure will bring us pain, the inverse is also true.
Don’t worry, she’s not advising us to take up masochism (unless that’s your thing!). But there are very safe healthy ways that we can tip the scales towards pain, ultimately leading to greater happiness.
Cold showers are an example she cites as particularly meritorious.
As a quick aside, we wrote about the other health benefits of these, too:
A Cold Shower A Day Keeps The Doctor Away?
Further reading
Want to know more? You might like her book:
Dopamine Nation: Finding Balance in the Age of Indulgence
Enjoy!
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Mediterranean Diet… In A Pill?
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Does It Come In A Pill?
For any as yet unfamiliar with the Mediterranean diet, you may be wondering what it involves, beyond a general expectation that it’s a diet popularly enjoyed in the Mediterranean. What image comes to mind?
We’re willing to bet that tomatoes feature (great source of lycopene, by the way, and if you’re not getting lycopene, you’re missing out), but what else?
- Salads, perhaps? Vegetables, olives? Olive oil, yea or nay?
- Bread? Pasta? Prosciutto, salami? Cheese?
- Pizza but only if it’s Romana style, not Chicago?
- Pan-seared liver, with some fava beans and a nice Chianti?
In fact, the Mediterranean diet is quite clear on all these questions, so to read about these and more (including a “this yes, that no” list), see:
What Is The Mediterranean Diet, And What Is It Good For?
So, how do we get that in a pill?
A plucky band of researchers, Dr. Chiara de Lucia et al. (quite a lot of “et al.”; nine listed authors on the study), wondered to what extent the benefits of the Mediterranean diet come from the fact that the Mediterranean diet is very rich in polyphenols, and set about testing that, by putting the same polyphenols in capsule form, and running a randomized, double-blind, placebo-controlled, crossover clinical intervention trial.
Now, polyphenols are not the only reason the Mediterranean diet is great; there are also other considerations, such as:
- a great macronutrient balance with lots of fiber, healthy fats, moderate carbs, and protein from select sources
- the absence or at least very low presence of a lot of harmful substances such as refined seed oils, added sugars, refined carbohydrates, and the like (“but pasta” yes pasta; in moderation and wholegrain and served with extra sources of fiber and healthy fats, all of which slow down the absorption of the carbs)
…but polyphenols are admittedly very important too; we wrote about some common aspects of them here:
Tasty Polyphenols: Enjoy Bitter Foods For Your Heart & Brain
As for what Dr. de Lucia et al. put into the capsule, behold…
The ingredients:
- Apple Extract 10.0%
- Pomegranate Extract 10.0%
- Tomato Powder 2.5%
- Beet, Spray Dried 2.5%
- Olive Extract 7.5%
- Rosemary Extract 7.5%
- Green Coffee Bean Extract (CA) 7.5%
- Kale, Freeze Dried 2.5%
- Onion Extract 10.0%
- Ginger Extract 10.0%
- Grapefruit Extract 2.5%
- Carrot, Air Dried 2.5%
- Grape Skin Extract 17.5%
- Blueberry Extract 2.5%
- Currant, Freeze Dried 2.5%
- Elderberry, Freeze Dried 2.5%
And the relevant phytochemicals they contain:
- Quercetin
- Luteolin
- Catechins
- Punicalagins
- Phloretin
- Ellagic Acid
- Naringin
- Apigenin
- Isorhamnetin
- Chlorogenic Acids
- Rosmarinic Acid
- Anthocyanins
- Kaempferol
- Proanthocyanidins
- Myricetin
- Betanin
And what, you may wonder, did they find? Well, first let’s briefly summarise the setup of the study:
They took volunteers (n=30), average age 67, BMI >25, without serious health complaints, not taking other supplements, not vegetarian or vegan, not consuming >5 cups of coffee per day, and various other stipulations like that, to create a fairly homogenous study group who were expected to respond well to the intervention. In contrast, someone who takes antioxidant supplements, already eats many different color plants per day, and drinks 10 cups of coffee, probably already has a lot of antioxidant activity going on, and someone with a lower BMI will generally have lower resting levels of inflammatory markers, so it’s harder to see a change, proportionally.
About those inflammatory markers: that’s what they were testing, to see whether the intervention “worked”; essentially, did the levels of inflammatory markers go up or down (up is bad; down is good).
For more on inflammation, by the way, see:
How to Prevent (or Reduce) Inflammation
…which also explains what it actually is, and some important nuances about it.
Back to the study…
They gave half the participants the supplement for a week and the other half placebo; had a week’s gap as a “washout”, then repeated it, switching the groups, taking blood samples before and after each stage.
What they found:
The group taking the supplement had lower inflammatory markers after a week of taking it, while the group taking the placebo had relatively higher inflammatory markers after a week of taking it; this trend was preserved across both groups (i.e., when they switched roles for the second half).
The results were very significant (p=0.01 or thereabouts), and yet at the same time, quite modest (i.e. the supplement made a very reliable, very small difference), probably because of the small dose (150mg) and small intervention period (1 week).
What the researchers concluded from this
The researchers concluded that this was a success; the study had been primarily to provide proof of principle, not to rock the world. Now they want the experiment to be repeated with larger sample sizes, greater heterogeneity, larger doses, and longer intervention periods.
This is all very reasonable and good science.
What we conclude from this
That ingredients list makes for a good shopping list!
Well, not the extracts they listed, necessarily, but rather those actual fruits, vegetables, etc.
If nine top scientists (anti-aging specialists, neurobiologists, pharmacologists, and at least one professor of applied statistics) came to the conclusion that to get the absolute most bang-for-buck possible, those are the plants to get the phytochemicals from, then we’re not going to ignore that.
So, take another list above and ask yourself: how many of those 16 foods do you eat regularly, and could you work the others in?
Want to make your Mediterranean diet even better?
While the Mediterranean diet is a top-tier catch-all, it can be tweaked for specific areas of health, for example giving it an extra focus on heart health, or brain health, or being anti-inflammatory, or being especially gut healthy:
Four Ways To Upgrade The Mediterranean
Enjoy!
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Cherries vs Cranberries – Which is Healthier?
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Our Verdict
When comparing cherries to cranberries, we picked the cherries.
Why?
In terms of macros, cherries have a little more protein (but it’s not much) while cranberries have a little more fiber. Despite this, cherries have the lower glycemic index—about half that of cranberries.
In the category of vitamins, cherries have a lot more of vitamins A, B1, B2, B3, B9, and a little more choline, while cranberries have more of vitamins B5, B6, C, E, and K. A modest win for cherries here.
When it comes to minerals, things are more divided: cherries have more calcium, copper, iron, magnesium, phosphorus, potassium, and zinc, while cranberries have more manganese. An easy win for cherries here.
This all adds up to a total win for cherries, but both of these fruits are great and both have their own beneficial properties (see our main features below!)
Want to learn more?
You might like to read:
- Cherries’ Very Healthy Wealth Of Benefits!
- Health Benefits Of Cranberries (But: You’d Better Watch Out)
Take care!
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A drug that can extend your life by 25%? Don’t hold your breath
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Every few weeks or months, the media reports on a new study that tantalisingly dangles the possibility of a new drug to give us longer, healthier lives.
The latest study centres around a drug involved in targeting interleukin-11, a protein involved in inflammation. Blocking this protein appeared to help mice stave off disease and extend their life by more than 20%.
If only defying the ravages of time could be achieved through such a simple and effort-free way – by taking a pill. But as is so often the case, the real-world significance of these findings falls a fair way short of the hype.
Halfpoint/Shutterstock The role of inflammation in disease and ageing
Chronic inflammation in the body plays a role in causing disease and accelerating ageing. In fact, a relatively new label has been coined to represent this: “inflammaging”.
While acute inflammation is an important response to infection or injury, if inflammation persists in the body, it can be very damaging.
A number of lifestyle, environmental and societal drivers contribute to chronic inflammation in the modern world. These are largely the factors we already know are associated with disease and ageing, including poor diet, lack of exercise, obesity, stress, lack of sleep, lack of social connection and pollution.
While addressing these issues directly is one of the keys to addressing chronic inflammation, disease and ageing, there are a number of research groups also exploring how to treat chronic inflammation with pharmaceuticals. Their goal is to target and modify the molecular and chemical pathways involved in the inflammatory process itself.
What the latest research shows
This new interleukin-11 research was conducted in mice and involved a number of separate components.
In one component of this research, interleukin-11 was genetically knocked out in mice. This means the gene for this chemical mediator was removed from these mice, resulting in the mice no longer being able to produce this mediator at all.
In this part of the study, the mice’s lives were extended by over 20%, on average.
Another component of this research involved treating older mice with a drug that blocks interleukin-11.
Injecting this drug into 75-week old mice (equivalent to 55-year-old humans) was found to extend the life of mice by 22-25%.
These treated mice were less likely to get cancer and had lower cholesterol levels, lower body weight and improved muscle strength and metabolism.
From these combined results, the authors concluded, quite reasonably, that blocking interleukin-11 may potentially be a key to mitigating age-related health effects and improving lifespan in both mice and humans.
Why you shouldn’t be getting excited just yet
There are several reasons to be cautious of these findings.
First and most importantly, this was a study in mice. It may be stating the obvious, but mice are very different to humans. As such, this finding in a mouse model is a long way down the evidence hierarchy in terms of its weight.
Research shows only about 5% of promising findings in animals carry over to humans. Put another way, approximately 95% of promising findings in animals may not be translated to specific therapies for humans.
Second, this is only one study. Ideally, we would be looking to have these findings confirmed by other researchers before even considering moving on to the next stage in the knowledge discovery process and examining whether these findings may be true for humans.
We generally require a larger body of evidence before we get too excited about any new research findings and even consider the possibility of human trials.
Third, even if everything remains positive and follow-up studies support the findings of this current study, it can take decades for a new finding like this to be translated to successful therapies in humans.
Until then, we can focus on doing the things we already know make a huge difference to health and longevity: eating well, exercising, maintaining a healthy weight, reducing stress and nurturing social relationships.
Hassan Vally, Associate Professor, Epidemiology, Deakin University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Oh, Honey
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The Bee’s Knees?
If you’d like to pre-empt that runny nose, some say that local honey is the answer. The rationale is that bees visiting the local sources of pollen and making honey will introduce the same allergens to you in a non allergy-inducing fashion (the honey). The result? Inoculation against the allergens in question.
But does it work?
Researching this, we found a lot of articles saying there was no science to back it up.
And then! We found one solitary study from 2013, and the title was promising:
But we don’t stop at titles; that’s not the kind of newsletter we are. We pride ourselves on giving good information!
And it turned out, upon reading the method and the results, that:
- Both the control and test groups also took loratadine for the first 4 weeks of the study
- The test group additionally took 1g/kg bodyweight of honey, daily—so for example if you’re 165lb (75kg), that’s about 4 tablespoons per day
- The control group took the equivalent amount of honey-flavored syrup
- Both groups showed equal improvements by week 4
- The test group only showed continued improvements (over the control group) by week 8
The researchers concluded from this:
❝Honey ingestion at a high dose improves the overall and individual symptoms of AR, and it could serve as a complementary therapy for AR.❞
We at 10almonds concluded from this:
❝That’s a lot of honey to eat every day for months!❞
We couldn’t base an article on one study from a decade ago, though! Fortunately, we found a veritable honeypot of more recent research, in the form of this systematic review:
Read: The Potential Use Of Honey As A Remedy For Allergic Diseases
…which examines 13 key studies and 43 scientific papers over the course of 21 years. That’s more like it! This was the jumping-off point we needed into more useful knowledge.
We’re not going to cite all those here—we’re a health and productivity newsletter, not an academic journal of pharmacology, but we did sift through them so that you don’t have to, and:
The researchers (of that review) concluded:
❝Although there is limited evidence, some studies showed remarkable improvements against certain types of allergic illnesses and support that honey is an effective anti-allergic agent.❞
Our (10almonds team) further observations included:
- The research review notes that a lot of studies did not confirm which phytochemical compounds specifically are responsible for causing allergic reactions and/or alleviating such (so: didn’t always control for what we’d like to know, i.e. the mechanism of action)
- Some studies showed results radically different from the rest. The reviewers put this down to differences that were not controlled-for between studies, for example:
- Some studies used very different methods to others. There may be an important difference between a human eating a tablespoon of honey, and a rat having aerosolized honey shot up its nose, for instance. We put more weight to human studies than rat studies!
- Some kinds of honey (such as manuka) contain higher quantities of gallic acid which itself can relieve allergies by chemically inhibiting the release of histamine. In other words, never mind pollen-based inoculations… it’s literally an antihistamine.
- Certain honeys (such as tualang, manuka and gelam) contain higher quantities of quercetin. What’s quercetin? It’s a plant flavonoid that a recent study has shown significantly relieves symptoms of seasonal allergies. So again, it works, just not for the reason people say!
In summary:
The “inoculation by local honey” thing specifically may indeed remain “based on traditional use only” for now.
But! Honey as a remedy for allergies, especially manuka honey, has a growing body of scientific evidence behind it.
Bottom line:
If you like honey, go for it (manuka seems best)! It may well relieve your symptoms.
If you don’t, off-the-shelf antihistamines remain a perfectly respectable option.
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Common Sense Labs: Blood Labs Demystified – by Dr. Ken Berry & Kim Howerton
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Most people, if given their test results as a set of numbers, will have no idea what they mean.
And a doctor or nurse saying “this is good”, “this is a bit low”, “this is very high” etc isn’t that much more informative, as it doesn’t really give a true feel for the information.
Dr. Berry produced this book to bridge that knowledge gap, and in his words, “put the power of health back in the hands of the people”. The book also covers what blood tests to recommend annually (finding common recommendations insufficient), and how to go about asking for those if your doctor might be keen to brush you off.
This is a short book (weighing in at a lithe 78 pages), but the information contained therein is very dense, and very convenient to have it all in one place.
As one Amazon reviewer wrote,
❝Someone said you can find the information on the Internet, but I would say good luck with that. It will be many many many hours compiling the gold that is in this book.❞
Writer’s anecdote: indeed, I recently had 14 blood tests done as part of a regular checkup (I’m pleased to report I could not be in better health), and while interpreting the results, I had to look up a lot of things (which were often in the wrong units*), and if I’d had this book already, it would have been a breeze, as it covers everything I had done!
*On which note, this book does provide results in US and International units, so you won’t be left wondering how to convert mmol/mol into mmol/L or mg/dL or such.
Bottom line: if you are a person who has blood, this book will at some point be of immense value to you, if not immediately!
Click here to check out Common Sense Labs, and understand what your blood is saying!
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