The Cold Truth About Respiratory Infections
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The Pathogens That Came In From The Cold
Yesterday, we asked you about your climate-themed policy for avoiding respiratory infections, and got the above-depicted, below-described, set of answers:
- About 46% of respondents said “Temperature has no bearing on infection risk”
- About 31% of respondents said “It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens”
- About 22% of respondents said “It’s important to stay warm to avoid getting colds, flu, etc”
Some gave rationales, including…
For “stay warm”:
❝Childhood lessons❞
For “get cold, fresh air”:
❝I just feel that it’s healthy to get fresh air daily. Whether it kills germs, I don’t know❞
For “temperature has no bearing”:
❝If climate issue affected respiratory infections, would people in the tropics suffer more than those in colder climates? Pollutants may affect respiratory infections, but I doubt just temperature would do so.❞
So, what does the science say?
It’s important to stay warm to avoid getting colds, flu, etc: True or False?
False, simply. Cold weather does increase the infection risk, but for reasons that a hat and scarf won’t protect you from. More on this later, but for now, let’s lay to rest the idea that bodily chilling will promote infection by cold, flu, etc.
In a small-ish but statistically significant study (n=180), it was found that…
❝There was no evidence that chilling caused any acute change in symptom scores❞
Read more: Acute cooling of the feet and the onset of common cold symptoms
Note: they do mention in their conclusion that chilling the feet “causes the onset of cold symptoms in about 10% of subjects who are chilled”, but the data does not support that conclusion, and the only clear indicator is that people who are more prone to colds generally, were more prone to getting a cold after a cold water footbath.
In other words, people who were more prone to colds remained more prone to colds, just the same.
It’s important to get plenty of cold, fresh air, as this kills/inactivates pathogens: True or False?
Broadly False, though most pathogens do have an optimal operating temperature that (for obvious reasons) is around normal human body temperature.
However, given that they don’t generally have to survive outside of a host body for long to get passed on, the fact that the pathogens may be a little sluggish in the great outdoors will not change the fact that they will be delighted by the climate in your respiratory tract as soon as you get back into the warm.
With regard to the cold air not being a reliable killer/inactivator of pathogens, we call to the witness stand…
Polar Bear Dies From Bird Flu As H5N1 Spreads Across Globe
(it was found near Utqiagvik, one of the northernmost communities in Alaska)
Because pathogens like human body temperature, raising the body temperature is a way to kill/inactivate them: True or False?
True! Unfortunately, it’s also a way to kill us. Because we, too, cannot survive for long above our normal body temperature.
So, for example, bundling up warmly and cranking up the heating won’t necessarily help, because:
- if the temperature is comfortable for you, it’s comfortable for the pathogen
- if the temperature is dangerous to the pathogen, it’s dangerous to you too
This is why the fever response evolved, and/but why many people with fevers die anyway. It’s the body’s way of playing chicken with the pathogen, challenging “guess which of us can survive this for longer!”
Temperature has no bearing on infection risk: True or False?
True and/or False, circumstantially. This one’s a little complex, but let’s break it down to the essentials.
- Temperature has no direct effect, for the reasons we outlined above
- Temperature is often related to humidity, which does have an effect
- Temperature does tend to influence human behavior (more time spent in open spaces with good ventilation vs more time spent in closed quarters with poor ventilation and/or recycled air), which has an obvious effect on transmission rates
The first one we covered, and the third one is self-evident, so let’s look at the second one:
Temperature is often related to humidity, which does have an effect
When the environmental temperature is warmer, water droplets in the air will tend to be bigger, and thus drop to the ground much more quickly.
When the environmental temperature is colder, water droplets in the air will tend to be smaller, and thus stay in the air for longer (along with any pathogens those water droplets may be carrying).
Some papers on the impact of this:
- Cold temperature and low humidity are associated with increased occurrence of respiratory tract infections
- A Decrease in Temperature and Humidity Precedes Human Rhinovirus Infections in a Cold Climate
So whatever temperature you like to keep your environment, humidity is a protective factor against respiratory infections, and dry air is a risk factor.
So, for example:
- If the weather doesn’t suit having good ventilation, a humidifier is a good option
- Being in an airplane is one of the worst places to be for this, outside of a hospital
Don’t have a humidifier? Here’s an example product on Amazon, but by all means shop around.
A crock pot with hot water in and the lid off is also a very workable workaround too
Take care!
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Pistachios vs Peanuts – Which is Healthier?
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Our Verdict
When comparing pistachios to peanuts, we picked the peanuts.
Why?
The choice might be surprising; after all, peanuts are usually the cheapest and most readily available nuts, popularly associated with calories and not much else. However! This one was super-close, and peanuts won very marginally, as you’ll see.
In terms of macros, pistachios have slightly more fiber and nearly 2x the carbs, while peanuts have slightly more protein and fats. What we all as individuals might prioritize more there is subjective, but this could arguably be considered a tie. About the fiber and carbs: peanuts have the lower glycemic index, but not by much. And about those fats: yes, they are healthy, and the fat breakdown for each is almost identical: pistachios have 53% monounsaturated, 33% polyunsaturated, and 14% saturated, while peanuts have 53% monounsaturated, 34% polyunsaturated, and 14% saturated. Yes, that adds up to 101% in the case of peanuts, but that’s what happens with rounding things to integers. However, the point is clear: both of these nuts have almost identical fats.
In the category of vitamins, pistachios have more of vitamins A, B1, B2, B6, and C, while peanuts have more of vitamins B3, B5, B9, E, and choline, So, a 5:5 tie on vitamins.
When it comes to minerals, pistachios have more calcium, copper, phosphorus, and potassium, while peanuts have more iron, magnesium, manganese, selenium, and zinc. So, a marginal victory for peanuts (and yes, the margins of difference were similar in each case).
Adding up the tie, the other tie, and the marginal victory for peanuts, means a marginal victory for peanuts in total.
A quick note in closing though: this was comparing raw unsalted nuts in both cases, so do take that into account when buying nuts, and at the very least, skip the salted, unless you are deficient in sodium. Or if you’re using them for cooking, then buying salted nuts because they’re usually cheaper is fine; just soak and rinse them to remove the salt.
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
Take care!
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Why You Can’t Deep Squat (And the Benefits You’re Missing)
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Matt Hsu fought his own battle with chronic pain from the age of 16 in his feet, knees, hips, back, shoulders, elbows, forearms, wrists, hands, and head. Seeking answers, he’s spent a career in corrective exercise, posture alignment, structural integration, orthopedic exercise, sports medicine, and has more certifications than we care to list. In short, he knows his stuff.
Yes you can (with some work)
The deep squat, also called Asian squat, Slav squat, sitting squat, resting squat, primal squat, and various other names, is an important way of sitting that has implications for a lot of aspects of health.
Why it’s so important: it preserves the mobility of our hips, ankles, and everything in between, and maintaining especially the hip mobility makes a big difference not only to general health, but also to reducing the risk of injury. It also maintains lower body strength, making falls in older age less likely in the first place, and if falls do happen, makes injury less likely, and if injury does happen, makes the injury likely less severe.
An important misconception: there is a popular, but unfounded, belief that the ability or inability to do this is decided by genes—or if not outright decided, that at the very least Asians and Slavs have a genetic advantage. However, this is simply not true. Westerners and others can learn to do it just fine, and on the flipside, Asians and Slavs who grew up in the West may often struggle with it. The truth is, the deciding factor is lifestyle: if your culture involves sitting this way more often, you’ll be able to do it more comfortably and easily than if you’re just now trying it for the first time.
Factors that you can control: you can’t change where you grew up, but you can change how you sit down now. Achieving the squat requires repeated position practice, and the more frequently you do so (even if you just start with a few seconds and work your way up to longer periods), the better you’ll get at it. And, on the contrary, sitting in chairs weakens and shortens the muscles involved, so any time you spend sitting in chairs is working against you. There are many reasons it’s advisable to avoid sitting in chairs more than necessary, and this is one of them.
10almonds tip: a limiting factor for many people initially is ankle flexibility, which may result in one’s center of gravity being a bit far back, leading to a tendency to have to change something to avoid toppling over backwards. Rather than holding onto something immobile (e.g. furniture) in front of where you are sitting, consider simply holding an object in front of you in your hands. A book is a fine example; holding that in front of you (feel free to read the book) will shift your center of gravity forwards a bit, and will thus allow you to sit there a little longer, thus improving your strength and flexibility while you do, until you can do it without holding something in front of you. If you try with a book and you’re still prone to toppling backwards, try with something heavier, but do use the minimum weight necessary, because ultimately the counterbalance is just a crutch to get you to where you need to be.
For more visual advice on how to do it, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
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Keep Inflammation At Bay
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How to Prevent (or Reduce) Inflammation
You asked us to do a main feature on inflammation, so here we go!
Before we start, it’s worth noting an important difference between acute and chronic inflammation:
- Acute inflammation is generally when the body detects some invader, and goes to war against it. This (except in cases such as allergic responses) is usually helpful.
- Chronic inflammation is generally when the body does a civil war. This is almost never helpful.
We’ll be tackling the latter, which frees up your body’s resources to do better at the former.
First, the obvious…
These five things are as important for this as they are for most things:
- Get a good diet—the Mediterranean diet is once again a top-scorer
- Exercise—move and stretch your body; don’t overdo it, but do what you reasonably can, or the inflammation will get worse.
- Reduce (or ideally eliminate) alcohol consumption. When in pain, it’s easy to turn to the bottle, and say “isn’t this one of red wine’s benefits?” (it isn’t, functionally*). Alcohol will cause your inflammation to flare up like little else.
- Don’t smoke—it’s bad for everything, and that goes for inflammation too.
- Get good sleep. Obviously this can be difficult with chronic pain, but do take your sleep seriously. For example, invest in a good mattress, nice bedding, a good bedtime routine, etc.
*Resveratrol (which is a polyphenol, by the way), famously found in red wine, does have anti-inflammatory properties. However, to get enough resveratrol to be of benefit would require drinking far more wine than will be good for your inflammation or, indeed, the rest of you. So if you’d like resveratrol benefits, consider taking it as a supplement. Superficially it doesn’t seem as much fun as drinking red wine, but we assure you that the results will be much more fun than the inflammation flare-up after drinking.
About the Mediterranean Diet for this…
There are many causes of chronic inflammation, but here are some studies done with some of the most common ones:
- Beneficial effect of Mediterranean diet in systemic lupus erythematosus patients
- How the Mediterranean diet and some of its components modulate inflammatory pathways in arthritis
- The effects of the Mediterranean diet on biomarkers of vascular wall inflammation and plaque vulnerability in subjects with high risk for cardiovascular disease
- Adherence to Mediterranean diet and 10-year incidence of diabetes: correlations with inflammatory and oxidative stress biomarkers*
*Type 1 diabetes is a congenital autoimmune disorder, as the pancreas goes to war with itself. Type 2 diabetes is different, being a) acquired and b) primarily about insulin resistance, and/but this is related to chronic inflammation regardless. It is also possible to have T1D and go on to develop insulin resistance, and that’s very bad, and/but beyond the scope of today’s newsletter, in which we are focusing on the inflammation aspects.
Some specific foods to eat or avoid…
Eat these:
- Leafy greens
- Cruciferous vegetables
- Tomatoes
- Fruits in general (berries in particular)
- Healthy fats, e.g. olives and olive oil
- Almonds and other nuts
- Dark chocolate (choose high cocoa, low sugar)
Avoid these:
- Processed meats (absolute worst offenders are hot dogs, followed by sausages in general)
- Red meats
- Sugar (includes most fruit juices, but not most actual fruits—the difference with actual fruits is they still contain plenty of fiber, and in many cases, antioxidants/polyphenols that reduce inflammation)
- Dairy products (unless fermented, in which case it seems to be at worst neutral, sometimes even a benefit, in moderation)
- White flour (and white flour products, e.g. white bread, white pasta, etc)
- Processed vegetable oils
See also: 9 Best Drinks To Reduce Inflammation, Says Science
Supplements?
Some supplements that have been found to reduce inflammation include:
(links are to studies showing their efficacy)
Consider Intermittent Fasting
Remember when we talked about the difference between acute and chronic inflammation? It’s fair to wonder “if I reduce my inflammatory response, will I be weakening my immune system?”, and the answer is: generally, no.
Often, as with the above supplements and dietary considerations, reducing inflammation actually results in a better immune response when it’s actually needed! This is because your immune system works better when it hasn’t been working in overdrive constantly.
Here’s another good example: intermittent fasting reduces the number of circulating monocytes (a way of measuring inflammation) in healthy humans—but doesn‘t compromise antimicrobial (e.g. against bacteria and viruses) immune response.
See for yourself: Dietary Intake Regulates the Circulating Inflammatory Monocyte Pool ← the study is about the anti-inflammatory effects of fasting
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The Science and Technology of Growing Young – by Sergey Young
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There are a lot of very optimistic works out there that promise the scientific breakthroughs that will occur very soon. Even amongst the hyperoptimistic transhumanism community, there is the joke of “where’s my flying car?” Sometimes prefaced with “Hey Ray, quick question…” as a nod to (or sometimes, direct address to) Ray Kurzweil, the Google computer scientist and futurist.
So, how does this one measure up?
Our author, Sergey Young, is not a scientist, but an investor with fingers in many pies. Specifically, pies relating to preventative medicine and longevity. Does that make him an unreliable narrator? Not necessarily, but it means we need to at least bear that context in mind.
But, also, he’s investing in those fields because he believes in them, and wants to benefit from them himself. In essense, he’s putting his money where his mouth is. But, enough about the author. What of the book?
It’s a whirlwind tour of the main areas of reseach and development, in the recent past, the present, and the near future. He talks about problems, and compelling solutions to problems.
If the book has a weak point, it’s that it doesn’t really talk about the problems to those solutions—that is, what can still go wrong. He’s excited about what we can do, and it’s somebody else’s job to worry about pitfalls along the way.
As to the “and what you can do now?” We’ll summarize:
- Mediterranean diet, mostly plant-based
- Get moderate exercise daily
- Get good sleep
- Don’t drink or smoke
- Get your personal health genomics data
- Get regular medical check-ups
- Look after your mental health too
Bottom line: this is a great primer on the various avenues of current anti-aging research and development, with discussion ranging from the the technological to the sociological. It has some health tips too, but the real meat of the work is the insight into the workings of the longevity industry.
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The China Study – by Dr. T Colin Campbell and Dr. Thomas M. Campbell
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This is not the newest book we’ve reviewed (originally published 2005; this revised and expanded edition 2016), but it is a seminal one.
You’ve probably heard it referenced, and maybe you’ve wondered what the fuss is about. Now you can know!
The titular study itself was huge. We tend to think “oh there was one study” and look to discount it, but it literally looked at the population of China. That’s a large study.
And because China is relatively ethnically homogenous, especially per region, it was easier to isolate what dietary factors made what differences to health. Of course, that did also create a limitation: follow-up studies would be needed to see if the results were the same for non-Chinese people. But even for the rest of us (this reviewer is not Chinese), it already pointed science in the right direction. And sure enough, smaller follow-up studies elsewhere found the same.
But enough about the research; what about the book? This is a book review, not a research review, after all.
The book itself is easy for a lay reader to understand. It explains how the study was conducted (no small feat), and how the data was examined. It also discusses the results, and the conclusions drawn from those results.
In light of all this, it also offers simple actionable advices, on how to eat to avoid disease in general, and cancer in particular. In especially that latter case, one take-home conclusion was: get more of your protein from plants for a big reduction in cancer risk, for example.
Bottom line: this book is an incredible blend of “comprehensive” and “readable” that we don’t often find in the same book! It contains not just a lot of science, but also an insight into how the science works, on a research level. And, of course, its results and conclusions have strong implications for all our lives.
Click here to check out The China Study, to know more about it!
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Escape Self-Sabotage
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Stop Making The Same Mistakes
It’s easy to think that a self-destructive cycle is easy to avoid if you have no special will to self-destruction. However, the cycle is sneaky.
It’s sneaky because it can be passive, and/or omissions rather than actions, procrastinations rather than obvious acts of impulse, and so forth.
So, they’re often things that specifically aren’t there to see.
How to catch them
How often do you think “I wish I had [done xyz]” or “I wish I had [done yxz] sooner”?
Now, how often have you thought that about the same thing more than once? For example, “I should have kept up my exercise”.
For things like this, habit-trackers are a great way to, well, keep track of habits. If for example you planned to do a 10-minute exercise session daily but you’ve been postponing it since you got distracted on January the 2nd, then it’ll highlight that. See also:
How To Really Pick Up (And Keep!) Those Habits
Speaking of habits, this goes for other forms of procrastination, too. For example, if you are always slow to get medical check-ups, or renew your prescriptions, or get ready for some regularly-occurring thing in your schedule, then set a reminder in your preferred way (phone app, calendar on the wall, whatever) and when the appointed time arrives (to book the check-up, renew the prescription, do your taxes, whatever), do it on the day you set your reminder for, as a personal rule for you that you keep to, barring extreme calamity.
By “extreme calamity” we mean less “running late today” and more “house burned down”.
Digital traps
Bad habits can be insidious in other ways too, like getting sucked into social media scrolling (it is literally designed to do that to you; you are not immune modern programming hijacking evolutionary dopamine responses).
Setting a screentime limit (you can specify “just these apps” if you like) will help with this. On most devices, this feature includes a sticky notification in the notification bar, that’ll remind you “27 out of 30 minutes remaining” or whatever you set it for. That’ll remind you to do what you went there to do, instead of getting caught in the endless scroll (and if you went there to just browse, to do so briefly).
Here’s how to set that:
Instructions for iOS devices | Instructions for Android devices
Oh, and on the topic of social media? If you find yourself getting caught up in unproductive arguments on the Internet, try the three-response rule:
- You reply; they reply (no progress made)
- You reply; they reply (still no progress made)
- You reply; they reply (still yet no progress made)
You reply just one more time: “I have a personal rule that if I’m arguing on the Internet and no progress has been made after three replies, I don’t reply further—I find this is helpful to avoid a lot of time lost to pointless arguing that isn’t going anywhere. Best wishes.”
(and then stick to it, no matter how they try to provoke you; best is to just not look until at least the next day)
When “swept up in love” gets to one of those little whirlpools…
The same works in personal relationships, by the way. If for example you are arguing with a loved one and not making progress, it can be good if you both have a pre-arranged agreement that either of you can, up to once on any given day, invoke a “time-out” (e.g. 30 minutes, but you agree the time between you when you first make this standing policy) during which you will both keep out of the other’s way, and come back with a more productive head on (remembering that things go best when it’s you both vs the problem, rather than vs each other).
See also:
Seriously Useful Communication Skills: Conflict Resolution
What if the self-sabotaging cycle is active and apparent?
Well, that is less sneaky, but certainly no less serious, and sometimes moreso. An obvious example is drinking too much; this is often cyclical in nature. We wrote about this one previously:
That article’s alcohol-specific, but the same advices go for other harmful activities, including other substance abuse (which in turn includes binge-eating), as well psychological addictions (such as gambling, for example).
Finally…
If your destructive cycle is more of a rut you’ve got stuck in, a common advice is to change something, anything, to get out of the rut.
That can be very bad advice! Because sometimes the change you go for is absolutely not the change that was needed, and is rather just cracking under pressure and doing something impulsive.
Here’s one way to actively get out of a slump:
Behavioral Activation Against Depression & Anxiety
Note: you do not have to be depressed or anxious to do this. But the point is, it’s a tool you can use even if you are depressed and/or anxious, so it’s a good thing to try for getting out of most kinds of slumps.
And really finally, here’s a resource for, well, the title speaks for itself:
When You Know What You “Should” Do (But Knowing Isn’t The Problem)
Take care!
Don’t Forget…
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