A Planet of Viruses – by Carl Zimmer
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We’ve reviewed numerous books on the immune system before, and this one’s mostly not about that.
Instead, this one focuses on the viruses themselves, and the part they play in our world, for good and for ill. Popular awareness tends to focus on the ill, of course.
But, there’s a lot that viruses do for us too, including:
- Weak/harmless viruses that keep our immune systems on their toes and ready
- Bacteriophage viruses that kill and consume pathogens that, left unchecked, would do the same to us
- Endogenous retroviruses that have become symbiotic with the human organism, without which our species would quickly go extinct
He also talks about biological warfare, and how we cannot bury our heads in the sand by avoiding research on those grounds, because someone will always do it anyway, so (as the motto of the immune system itself might say), best to be prepared.
The author is a science journalist, by the way, and has no PhD, but does have a flock of Fellowships and assorted scientific awards and honors, so he appears to be doing good work so far as the scientific community is concerned.
Bottom line: if you’d like to know more about viruses than “they’re very small and can cause harm”, then this book will open a whole new world.
Click here to check out A Planet of Viruses, and upgrade your knowledge!
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The Meds That Impair Decision-Making
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Impairment to cognitive function is often comorbid with Parkinson’s disease. That is to say: it’s not a symptom of Parkinson’s, but it often occurs in the same people. This may seem natural: after all, both are strongly associated with aging.
However, recent (last month, at time of writing) research has brought to light a very specific way in which medication for Parkinson’s may impair the ability to make sound decisions.
Obviously, this is a big deal, because it can affect healthcare decisions, financial decisions, and more—greatly impacting quality of life.
See also: Age-related differences in financial decision-making and social influence
(in which older people were found more likely to be influenced by the impulsive financial preferences of others than their younger counterparts, when other factors are controlled for)
As for how this pans out when it comes to Parkinson’s meds…
Pramipexole (PPX)
This drug can, due to an overlap in molecular shape, mimic dopamine in the brains of people who don’t have enough—such as those with Parkinson’s disease. This (as you might expect) helps alleviate Parkinson’s symptoms.
However, researchers found that mice treated with PPX and given a touch-screen based gambling game picked the high-risk, high reward option much more often. In the hopes of winning strawberry milkshake (the reward), they got themselves subjected to a lot of blindingly-bright flashing lights (the risk, to which untreated mice were much more averse, as this is very stressful for a mouse).
You may be wondering: did the mice have Parkinson’s?
The answer: kind of; they had been subjected to injections with 6-hydroxydopamine, which damages dopamine-producing neurons similarly to Parkinson’s.
This result was somewhat surprising, because one would expect that a mouse whose depleted dopamine was being mimicked by a stand-in (thus, doing much of the job of dopamine) would be less swayed by the allure of gambling (a high-dopamine activity), since gambling is typically most attractive to those who are desperate to find a crumb of dopamine somewhere.
They did find out why this happened, by the way, the PPX hyperactivated the external globus pallidus (also called GPe, and notwithstanding the name, this is located deep inside the brain). Chemically inhibiting this area of the brain reduced the risk-taking activity of the mice.
This has important implications for Parkinson’s patients, because:
- on an individual level, it means this is a side effect of PPX to be aware of
- on a research-and-development level, it means drugs need to be developed that specifically target the GPe, to avoid/mitigate this side effect.
You can read the study in full here:
Don’t want to get Parkinson’s in the first place?
While nothing is a magic bullet, there are things that can greatly increase or decrease Parkinson’s risk. Here’s a big one, as found recently (last week, at the time of writing):
Air Pollution and Parkinson’s Disease in a Population-Based Study
Also: knowing about its onset sooner rather than later is scary, but beneficial. So, with that in mind…
Recognize The Early Symptoms Of Parkinson’s Disease
Finally, because Parkinson’s disease is theorized to be caused by a dysfunction of alpha-synuclein clearance (much like the dysfunction of beta-amyloid clearance, in the case of Alzheimer’s disease), this means that having a healthy glymphatic system (glial cells doing the same clean-up job as the lymphatic system, but in the brain) is critical:
How To Clean Your Brain (Glymphatic Health Primer)
Take care!
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Hot And Sour Shiitake Soup
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This is a popular, easy, and delicious soup that nonetheless is not found in many western kitchens, despite being enjoyed in restaurants/take-out. Best of all, making it at home means that you know all the ingredients, can account for quality, and also can customize it per your preferences (i.e. how much heat/sourness you like).
You will need
- 3 cups shiitake mushrooms, sliced
- 3 cups bok choy, chopped
- 2 cups cherry tomatoes, quartered
- 1 cup carrot, grated
- 3 spring onions, chopped
- 2 shallots, sliced lengthways
- 2 serrano chilis (or similar), sliced thinly
- 2 tbsp apple cider vinegar
- 1 tbsp lemon juice
- 1 tbsp fresh ginger, sliced into 1″ strips
- 1 tsp black pepper, coarse ground
- ½ bulb garlic, crushed
- 6 cups low-sodium vegetable stock. Ideally you will have made it yourself from vegetable cuttings that you saved in the freezer until you had enough to make stock from, but if that’s not an option, then low-sodium vegetable stock cubes can be purchased and used.
- Garnish: ¼ cup (or 4 tbsp) cilantro, chopped, or if you have the soap gene, then this time we recommend chopped basil as the subsitution
Method
(we suggest you read everything at least once before doing anything)
1) Put the ginger in a big pot with the stock; cover and simmer for about 20 minutes (otherwise the ginger flavor will remain mostly concentrated in the ginger strips).
2) Bring it to a boil and add the bok choy, mushrooms, shallots, chili peppers, and the carrot; simmer for another 5 minutes
3) Add the remaining ingredients except for the garnish, and simmer for another 5 minutes
4) Serve, adding the garnish
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- The (Longevity) Magic of Mushrooms
- Our Top 5 Spices: How Much Is Enough For Benefits?
- An Apple (Cider Vinegar) A Day…
- Enjoy Bitter/Hot/Sour/Pungent Foods For Your Heart & Brain
- Brain Food? The Eyes Have It!
- Some Surprising Truths About Hunger And Satiety
Take care!
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Chromium Picolinate For Blood Sugar Control & Weight Loss
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First, a quick disambiguation:
- chromium found in food, trivalent chromium of various kinds, is safe (in the quantities usually consumed) and is sometimes considered an essential mineral, sometimes considered unnecessary but beneficial. It’s hard to know for sure, since it’s in a lot of foods (naturally, like many trace elements)
- chromium found in pollution, hexavalent chromium (so: twice as many cationic bonds, if this writer’s chemistry serves her correctly) is poisonous.
We’re going to be writing about the food kind, which is also possible to take as a supplement.
In this case, supplementing vs getting from food is quite a big difference, by the way, since (unlike for a lot of things, which are often the other way around) the bioavailability of chromium from food is very low (around 2.5%), whereas chromium picolinate, one of the most commonly-used supplement forms, boasts higher bioavailability.
Does it work for blood sugars?
Yes, it does! At least, it does in the case of people with type 2 diabetes. Rather than bombard you with many individual studies, here’s a systematic review and meta-analysis of 22 criteria-meeting randomized clinical trials that found:
❝The available evidence suggests favourable effects of chromium supplementation on glycaemic control in patients with diabetes.
Chromium monosupplement may additionally improve triglycerides and HDL-C levels.❞
Type 1 diabetes does not have anything like the same weight of evidence, and indeed,
we couldn’t find a single human study. It was beneficial for mice with artificially-induced T1D, thoughwait no, we have an update! We found literally a single human study:Chromium picolinate supplementation for diabetes mellitus
Literally, as in: it’s a case study of one person, and the results were a modest reduction in Hb A1c levels after 3 months of 600μg daily; the researchers concluded that ❝chromium picolinate continues to fall squarely within the scope of “alternative medicine,” with both unproven benefits and unknown risks❞.
As for people without diabetes, it may reduce the risk of diabetes:
Risk of Type 2 Diabetes Is Lower in US Adults Taking Chromium-Containing Supplements
However! This was an observational study, and correlation ≠ causation.
Furthermore, they said:
❝Over one-half the adult US population consumes nutritional supplements, and over one-quarter consumes supplemental chromium. The odds of having T2D were lower in those who, in the previous 30 d, had consumed supplements containing chromium❞
That “over one-quarter consumes supplemental chromium” brought our attention to the fact that this is not talking about specifically chromium “monosupplements” (definitely not quarter of the adult population take those), but rather, “multivitamin and mineral” supplements that also contain a tiny amount (often under 50μg) of chromium.
In other words, this ruins the data and honestly the benefit could have been from anything in the “multivitamin and mineral” supplement, or indeed, could just be “the kind of person who takes supplements is the kind of person who lives a lifestyle that is less conducive to becoming diabetic”.
Does it work for weight loss?
We’re running out of space here, so we’ll be brief:
No.
There are many papers that have concluded this, but here are two:
Chromium picolinate supplementation for overweight or obese adults
and
Is it safe?
Science’s current best answer is “we don’t know; it hasn’t been tested enough; we haven’t even established the tolerable upper limit, which is usually step 1 of establishing safety”.
Nor is there an estimated average requirement (if indeed there even is a requirement, which question is also not as yet answered conclusively by science), and science falls back to “here’s an average of what people consume in their diet, so that’s probably safe, we guess”.
(that average was reckoned as 25μg/day for young women and 25μg/day for young men, by the way; older ages not as yet reckoned)
You can read about this sorry state of affairs here.
Want to try some?
Notwithstanding the above lack of data for safety, it does have benefits for blood sugars, so if that’s a gamble you’re willing to make, then here’s an example product on Amazon.
Note: the dosage per capsule there (800μg) is half of the low end of the dose that was implicated in the serious kidney condition caused in this case study (1200–2400μg), so if you are going to try it, we strongly recommend not taking more than one per day.
Take care!
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Fast Diet, Fast Exercise, Fast Improvements
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Diet & Exercise, Optimized
This is Dr. Michael Mosley. He originally trained in medicine with the intention of becoming a psychiatrist, but he grew disillusioned with psychiatry as it was practised, and ended up pivoting completely into being a health educator, in which field he won the British Medical Association’s Medical Journalist of the Year Award.
He also died under tragic circumstances very recently (he and his wife were vacationing in Greece, he went missing while out for a short walk on the 5th of June, appears to have got lost, and his body was found 100 yards from a restaurant on the 9th). All strength and comfort to his family; we offer our small tribute here today in his honor.
The “weekend warrior” of fasting
Dr. Mosley was an enjoyer (and proponent) of intermittent fasting, which we’ve written about before:
Fasting Without Crashing? We Sort The Science From The Hype
However, while most attention is generally given to the 16:8 method of intermittent fasting (fast for 16 hours, eat during an 8 hour window, repeat), Dr. Mosley preferred the 5:2 method (which generally means: eat at will for 5 days, then eat a reduced calorie diet for the other 2 days).
Specifically, he advocated putting that cap at 800 kcal for each of the weekend days (doesn’t have to be specifically the weekend).
He also tweaked the “eat at will for 5 days” part, to “eat as much as you like of a low-carb Mediterranean diet for 5 days”:
❝The “New 5:2” approach involves restricting calories to 800 on fasting days, then eating a healthy lower carb, Mediterranean-style diet for the rest of the week.
The beauty of intermittent fasting means that as your insulin sensitivity returns, you will feel fuller for longer on smaller portions. This is why, on non-fasting days, you do not have to count calories, just eat sensible portions. By maintaining a Mediterranean-style diet, you will consume all of the healthy fats, protein, fibre and fresh plant-based food that your body needs.❞
Read more: The Fast 800 | The New 5:2
And about that tweaked Mediterranean Diet? You might also want to check out:
Four Ways To Upgrade The Mediterranean Diet
Knowledge is power
Dr. Mosley encouraged the use of genotyping tests for personal health, not just to know about risk factors, but also to know about things such as, for example, whether you have the gene that makes you unable to gain significant improvements in aerobic fitness by following endurance training programs:
The Real Benefit Of Genetic Testing
On which note, he himself was not a fan of exercise, but recognised its importance, and instead sought to minimize the amount of exercise he needed to do, by practising High Intensity Interval Training. We reviewed a book of his (teamed up with a sports scientist) not long back; here it is:
Fast Exercise: The Simple Secret of High Intensity Training – by Dr. Michael Mosley & Peta Bee
You can also read our own article on the topic, here:
How To Do HIIT (Without Wrecking Your Body)
Just One Thing…
As well as his many educational TV shows, Dr. Mosley was also known for his radio show, “Just One Thing”, and a little while ago we reviewed his book, effectively a compilation of these:
Just One Thing: How Simple Changes Can Transform Your Life – by Dr. Michael Mosley
Enjoy!
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Dioscorea Villosa: Hormones, Arthritis, & Skin
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On A Wild Yam Chase?
We recently came across a supplement blend that had wild yam extract as a minor ingredient. Our plucky (and usually very knowledgable) researcher had never heard of its use before, so she set about doing her thing. This is what she found…
What health claims are made?
Wild yam extract (Dioscorea villosa) is traditionally sold and used for:
- Balancing hormones
- Combating arthritis
- Anti-aging effects for the skin
Does it balance hormones?
First, as a quick catch-up, we’ll drop a previous article of ours for your convenience:
What Does “Balance Your Hormones” Even Mean?
We couldn’t find almost any studies into wild yam extract’s hormone-balancing effects, but we did find one study, and:
❝Symptom scores showed a minor effect of both placebo and active treatment on diurnal flushing number and severity and total non-flushing symptom scores, and on nocturnal sweating after placebo, but no statistical difference between placebo and active creams.
This study suggests that short-term treatment with topical wild yam extract in women suffering from menopausal symptoms is free of side-effects, but appears to have little effect on menopausal symptoms❞
…which is a very thorough, polite, sciencey way of saying “wow, this does so many different kinds of nothing”
On the one hand, this was a small study (n=23). On the other hand, it was also literally the only study we could find.
Does it combat arthritis?
Maybe! We again didn’t find much research into this but we did find two in vitro studies that suggests that diosgenin (which can be derived from wild yam extract) helps:
- Diosgenin inhibits IL-1β-induced expression of inflammatory mediators in human osteoarthritis chondrocytes
- Diosgenin, a plant steroid, induces apoptosis in human rheumatoid arthritis synoviocytes with cyclooxygenase-2 overexpression
And we also found a rodent study that found that wild yam extract specifically helped against “acetic acid-induced writhing and formalin-induced pain“, and put that down to anti-inflammatory properties:
So, none of these studies tell us much about whether it would be helpful for humans—with or without arthritis, and hopefully without “acetic acid-induced writhing and formalin-induced pain”.
However, they do suggest that it would be reasonable to test in humans next.
You might prefer:
- Tips For Avoiding/Managing Osteoarthritis
- Tips For Avoiding/Managing Rheumatoid Arthritis
- How to Prevent (or Reduce) Inflammation
Does it keep skin young?
Again, research is thin on the ground, but we did find some! A study with wild-yam-derived diosgenin found that it didn’t make anything worse, and otherwise performed a similar role to vitamin A:
Read: Novel effects of diosgenin on skin aging
That was on rats with breast cancer though, so its applicability to healthy humans may be tenuous (while in contrast, simply getting vitamin A instead is a known deal).
Summary
- Does it balance hormones? It probably does little to nothing in this regard
- Does it combat arthritis? It probably has anti-inflammatory effects, but we know of no studies in humans. There are much more well-established anti-inflammatories out there.
- Does it keep the skin young? We know that it performs a role similar to vitamin A for rats with breast cancer, and didn’t make anything worse for them. That’s the extent of what we know.
Where can I get some?
In the unlikely event that the above research review has inspired you with an urge to buy wild yam extract, here is an example product for your convenience.
Some final words…
If you are surprised that we’re really not making any effort to persuade you of its merits, please know that (outside of the clearly-marked sponsor section, which helps us keep the lights on, so please do visit those) we have no interest in selling you anything. We’re genuinely just here to inform 🙂
If you are wondering why we ran this article at all if the supplement has negligible merits, it’s because science is science, knowledge is knowledge, and knowing that something has negligible merit can be good knowledge to have!
Also, running articles like this from time to time helps you to know that when we do sing the praises of something, it’s with good reason
Take care!
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Tell Yourself a Better Lie – by Marissa Peer
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As humans, we generally lie to ourselves constantly. Or perhaps we really believe some of the things we tell ourselves, even if they’re not objectively necessarily true:
- I’ll always be poor
- I’m destined to be alone
- I don’t deserve good things
- Etc.
Superficially, it’s easy to flip those, and choose to tell oneself the opposite. But it feels hollow and fake, doesn’t it? That’s where Marissa Peer comes in.
Our stories that we tell ourselves don’t start where we are—they’re generally informed by things we learned along the way. Sometimes good lessons, sometimes bad ones. Sometimes things that were absolutely wrong and/or counterproductive.
Peer invites the reader to ask “What if…”, unravel how the unhelpful lessons got wired into our brains in the first place, and then set about untangling them.
“Tell yourself a better lie” does not mean self-deceit. It means that we’re the authors of our own stories, so we might as well make them work for us. Many things in life are genuinely fixed; others are open to interpretation.
Sorting one from the other, and then treating them correctly in a way that’s helpful to us? That’s how we can stop hurting ourselves, and instead bring our own stories around to uplift and fortify us.
Get Your Copy of “Tell Yourself A Better Lie” on Amazon Today!
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