I’m feeling run down. Why am I more likely to get sick? And how can I boost my immune system?
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It has been a long winter, filled with many viruses and cost-of-living pressures, on top of the usual mix of work, study, life admin and caring responsibilities.
Stress is an inevitable part of life. In short bursts, our stress response has evolved as a survival mechanism to help us be more alert in fight or flight situations.
But when stress is chronic, it weakens the immune system and makes us more vulnerable to illnesses such as the common cold, flu and COVID.
Stress makes it harder to fight off viruses
When the immune system starts to break down, a virus that would normally have been under control starts to flourish.
Once you begin to feel sick, the stress response rises, making it harder for the immune system to fight off the disease. You may be sick more often and for longer periods of time, without enough immune cells primed and ready to fight.
In the 1990s, American psychology professor Sheldon Cohen and his colleagues conducted a number of studies where healthy people were exposed to an upper respiratory infection, through drops of virus placed directly into their nose.
These participants were then quarantined in a hotel and monitored closely to determine who became ill.
One of the most important factors predicting who got sick was prolonged psychological stress.
Cortisol suppresses immunity
“Short-term stress” is stress that lasts for a period of minutes to hours, while “chronic stress” persists for several hours per day for weeks or months.
When faced with a perceived threat, psychological or physical, the hypothalamus region of the brain sets off an alarm system. This signals the release of a surge of hormones, including adrenaline and cortisol.
In a typical stress response, cortisol levels quickly increase when stress occurs, and then rapidly drop back to normal once the stress has subsided. In the short term, cortisol suppresses inflammation, to ensure the body has enough energy available to respond to an immediate threat.
But in the longer term, chronic stress can be harmful. A Harvard University study from 2022 showed that people suffering from psychological distress in the lead up to their COVID infection had a greater chance of experiencing long COVID. They classified this distress as depression, probable anxiety, perceived stress, worry about COVID and loneliness.
Those suffering distress had close to a 50% greater risk of long COVID compared to other participants. Cortisol has been shown to be high in the most severe cases of COVID.
Stress causes inflammation
Inflammation is a short-term reaction to an injury or infection. It is responsible for trafficking immune cells in your body so the right cells are present in the right locations at the right times and at the right levels.
The immune cells also store a memory of that threat to respond faster and more effectively the next time.
Initially, circulating immune cells detect and flock to the site of infection. Messenger proteins, known as pro-inflammatory cytokines, are released by immune cells, to signal the danger and recruit help, and our immune system responds to neutralise the threat.
During this response to the infection, if the immune system produces too much of these inflammatory chemicals, it can trigger symptoms such as nasal congestion and runny nose.
What about chronic stress?
Chronic stress causes persistently high cortisol secretion, which remains high even in the absence of an immediate stressor.
The immune system becomes desensitised and unresponsive to this cortisol suppression, increasing low-grade “silent” inflammation and the production of pro-inflammatory cytokines (the messenger proteins).
Immune cells become exhausted and start to malfunction. The body loses the ability to turn down the inflammatory response.
Over time, the immune system changes the way it responds by reprogramming to a “low surveillance mode”. The immune system misses early opportunities to destroy threats, and the process of recovery can take longer.
So how can you manage your stress?
We can actively strengthen our immunity and natural defences by managing our stress levels. Rather than letting stress build up, try to address it early and frequently by:
1) Getting enough sleep
Getting enough sleep reduces cortisol levels and inflammation. During sleep, the immune system releases cytokines, which help fight infections and inflammation.
2) Taking regular exercise
Exercising helps the lymphatic system (which balances bodily fluids as part of the immune system) circulate and allows immune cells to monitor for threats, while sweating flushes toxins. Physical activity also lowers stress hormone levels through the release of positive brain signals.
3) Eating a healthy diet
Ensuring your diet contains enough nutrients – such as the B vitamins, and the full breadth of minerals like magnesium, iron and zinc – during times of stress has a positive impact on overall stress levels. Staying hydrated helps the body to flush out toxins.
4) Socialising and practising meditation or mindfulness
These activities increase endorphins and serotonin, which improve mood and have anti-inflammatory effects. Breathing exercises and meditation stimulate the parasympathetic nervous system, which calms down our stress responses so we can “reset” and reduce cortisol levels.
Sathana Dushyanthen, Academic Specialist & Lecturer in Cancer Sciences & Digital Health| Superstar of STEM| Science Communicator, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Dangers Of Root Canals And Crowns, & What To Do Instead
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Dr. Michelle Jorgensen, a dentist, tells us that it’s a lot rarer than people think to actually need a crown or a root canal; there are ways of avoiding such:
The tooth, the whole tooth, and nothing but the tooth?
First, some of the problems with the treatments that are most popular, especially in the US:
Problems with root canals:
- Involves cleaning and filling the tooth’s main canal but leaves microtubules that can harbor dead tissue and attract bacteria.
- This can lead to infections, often undetected for a long time due to the nerve removal, potentially harming overall health and weakening the tooth.
- Root canals often result in brittle teeth that can break, necessitating crowns.
And then…
Problems with crowns:
- A crown requires significant removal of tooth structure (up to 1.5 mm of enamel), making the tooth more vulnerable and sensitive.
- Crowns can also lead to new cavities underneath due to weak bonding to dentin.
- The cycle often leads from a healthy tooth to fillings, crowns, root canals, and eventual extraction (and then, perhaps, an implant in its place). That’s great for the dentist, but not so great for you.
Biomimetic dentistry the exciting name currently being used for what has been more prosaically called “conservative restorative dentistry”, which in turn has also been known by other names in recent decades, and its goal is to strengthen and preserve natural teeth as much as possible.
Methods it uses:
- Treats affected but still living teeth with non-invasive procedures.
- Uses ozone treatment to kill bacteria in deep cavities, avoiding direct nerve exposure.
- Applies conservative partial restorations like onlays instead of full crowns.
Benefits of this approach:
- Preserves enamel, minimizes trauma, and reduces the risk of tooth death.
- Maintains long-term tooth structure and health.
- 95% success rate in saving affected teeth without resorting to root canals.
In short, Dr. Jorgensen says that 60–80% of traditional crowns and root canals can be avoided. Which is surely a good thing.
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like:
Tooth Remineralization: How To Heal Your Teeth Naturally
Take care!
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Sunflower Oil vs Canola Oil – Which is Healthier?
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Our Verdict
When comparing sunflower oil to canola oil, we picked the sunflower oil.
Why?
They’re both terrible! But canola oil is worse. Sunflower oil is marketed as being higher in polyunsaturated fats, which it is, albeit not by much.
Canola oil is very bad for the heart, and sunflower oil is only moderately bad for the heart, to the point that it can be heart-neutral if used sparingly.
As seed oils, they are both sources of vitamin E, but you’d need to drink a cup of oil to get your daily dose, so please just eat some seeds (or nuts, or fruit, or something) instead. It can even be sunflower seeds if you like! Rapeseed* itself (the seed that canola oil is made from) isn’t really sold as a foodstuff, so that one’s less of an option.
*Fun fact: if you’re N. American and wondering what this “rapeseed” is, know that most of the rest of the Anglosphere calls canola oil “rapeseed oil”, as it’s made from rapeseed, which comes from a plant called rape, whose name is unrelated to the crime of the same name, and comes from rāpa, the Latin word for turnip. Anyway, “canola” is a portmanteau of “Canadian” and “Ola” meaning oil, and is a trademark that has made its way into generic use throughout N. America, as a less alarming name.
Back to health matters: while sunflower seeds are healthy in moderation, the ultraprocessed and refined sunflower and canola oils are not.
Canola oil has also been found to be implicated in age-related cognitive decline, whereas sunflower oil has had mixed results in that regard.
In summary
Sunflower oil is relatively, and we stress relatively, healthier than canola oil. Please use a healthier oil than either if you can. Olive oil is good for most things, and if you need something with a higher smoke point (and/or less distinctive flavor), consider avocado oil, which is also very healthy and whose smoke point is even higher than the seed oils we’ve been discussing today.
Want to know more?
Check out:
Avocado Oil vs Olive Oil – Which is Healthier?
Enjoy!
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Why STIs Are On The Rise In Older Adults
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Three Little Words
Sexually Transmitted Infections (STIs) are often thought of as something that predominantly plagues younger people… The truth, however, is different:
❝Rising divorce rates, forgoing condoms as there is no risk of pregnancy, the availability of drugs for sexual dysfunction, the large number of older adults living together in retirement communities, and the increased use of dating apps are likely to have contributed to the growing incidence of STIs in the over-50s.
These data likely underestimate the true extent of the problem as limited access to sexual health services for the over 50s, and trying to avoid the stigma and embarrassment both on the part of older people and healthcare professionals, is leading to this age group not seeking help for STIs.❞
Read more: Managing The Rise In STIs Among Older Adults
That said, there is a gender gap when it comes to the increased risk, for example:
❝A retrospective study from the USA involving 420,790 couples aged 67 to 99 years, found that widowhood was associated with an increased risk of STIs in older men, but not women❞
~ US Dept of Health & Human Services
Source: CDC: | Sexually Transmitted Disease Surveillance
Is abstinence the best preventative, then?
It is inarguably the most effective, but not necessarily the best for everyone.
This is because for most adults, a healthy sex life is an important part of overall wellbeing.
See also: Mythbusting The Big O
Even in this case there is a gender gap in:
- the level of importance placed on frequency of sexual interactions
- what act(s) of sexuality are held to be most important:
❝Among sexually active men, frequent (≥2 times a month) sexual intercourse (P < .001) and frequent kissing, petting, or fondling (P < .001) were associated with greater enjoyment of life.
Among sexually active women, frequent kissing, petting, or fondling was also associated with greater enjoyment of life (P < .001), but there was no significant association with frequent intercourse (P = .101).
Concerns about one’s sex life and problems with sexual function were strongly associated with lower levels of enjoyment of life in men and to a lesser extent in women.❞
Source: Sexual Activity is Associated with Greater Enjoyment of Life in Older Adults
If you have the time to go into it much more deeply, this paper from the Journal of Gerontology is much more comprehensive, looking also at related lifestyle factors, religious/political backgrounds, views on monogamy or non-monogamy (of various kinds), hormonal considerations, the impact of dementia or other long-term disabilities that may affect things, widowhood, and many other elements:
The National Social Life, Health, and Aging Project: An Introduction
What’s the best preventative, then?
Regular health screening for yourself and your partner(s) is an important key to preventative health when it comes to STIs.
You can Google search for a local STI clinic, and worry not, they are invariably discreet and are well-used to everybody coming in. They’re just glad you’re being responsible about things. It’s also not their job to judge your sexual activities, even if it’s something you might have reason to wish to be secretive about, try to be honest there.
Secondly, most of the usual advice about safe sex still goes, even when there’s no risk of pregnancy. For example, if there’s at least one penis involved, then condoms remain the #1 barrier to all manner of potential infections (we know, almost nobody likes condoms, but sometimes the truth isn’t what we want to hear).
Lastly, if there’s at least one vagina involved, then please for the love of all that is holey, do not put anything there that could cause a yeast infection.
What can cause a yeast infection? Pretty much anything with sugar, which includes but is not limited to:
- Most kinds of food that Cosmo-style “liven things up in the bedroom” advice columns might suggest using (including fruit, honey, chocolate sauce, whipped cream, etc)
- Hands that are not clean (watch out for bacteria too)
- A mouth that has recently been eating or drinking anything with sugar in it, and that includes many kinds of alcohol, as well as milk or hot drinks that had milk in
Yeast infections are not nearly so serious as the STIs the other measures are there to avoid, but they’re not fun either, so some sensible policies in that regard are always good!
On a related note, see also: How To Avoid UTIs
Recap on the single most important part of this article:
At all ages, it remains a good health practice—unless one is absolutely celibate—to regularly get oneself and one’s partner(s) checked for STIs.
Take care!
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Science-Based Alternative Pain Relief
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When Painkillers Aren’t Helping, These Things Might
Maybe you want to avoid painkillers, or maybe you’ve already maxed out what you can have, and want more options as an extra help against the pain.
Today we’ll look at some science-backed alternative pain relief methods:
First: when should we try to relieve pain?
There is no such thing as “this pain is not too much”. The correct amount of pain is zero. Maybe your body won’t let you reach zero, but more than that is “too much” already.
You don’t have to be suffering off the scale to deserve relief from pain!
So: if it hurts, then if you can safely get relief from the pain, it’s already wise to do so.
A couple of things we covered previously
CBD and THC are technically drugs, but are generally considered “alternative” pain relief, so we’ll give a quick mention here:
Short version:
- CBD can treat some kinds of treatment-resistant pain well (others, not so much—try it and find out if it works for you)
- THC can offer some people respite not found from other methods—but beware, because there are many health risks to consider.
Acupuncture
Pain relief appears to be its strongest suit:
Pinpointing The Usefulness Of Acupuncture
Cloves
Yes, just like you can get from the supermarket.
In its medicinal uses, it’s most well-known as a toothache remedy, but it has a local analgesic effect wherever you put it (i.e., apply it topically to where the pain is), thanks to its eugenol content:
Boswellia (frankincense)
The resin of the Boswellia serrata tree, this substance has an assortment of medicinal properties, including pain relief, anti-inflammatory effect, and psychoactive (anxiolytic and antidepressant) effects:
Frankincense is psychoactive: new class of antidepressants might be right under our noses
And as for physical pain? Here’s how it faired against the pain of osteoarthritis (and other OA symptoms, but we’re focusing on pain today), for example:
Here’s an example product on Amazon, but feel free to shop around as there are many options, including for example this handy roll-on
Further reading
Intended for chronic pain, but in large part applicable to acute pain also:
Managing Chronic Pain (Realistically!)
Take care!
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The Plant-Based Athlete – by Matt Frazier and Robert Cheeke
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If you’re already a seasoned plant-based athlete yourself, you can probably skip this book; the 60 recipes at the end would still provide value, but there is the “No Meat Athlete Cookbook” that you could hop straight to, in any case.
For most readers, there will be plenty of value from start to finish. We get a quick ground-up tour of nutrition basics, before getting into restructuring diet to optimize it for performance.
There is less in the way of “Vegans struggle with…” and more in the way of “People think vegans struggle with…” and explanations of what vegan athletes actually eat. The book does include science, but isn’t too science-heavy, and relies more on modelling what plant-based superathletes enjoy on a daily basis.
To that end,if the book has a weak point, it’s perhaps that it could have stood to include more science. The book comes recommended by Dr. Michael Greger, whose nutritional approach is incredibly science-heavy and well-referenced, and this book is obviously compatible with that (so they could have!), but in this case Frazier and Cheeke leave us to take their word for it.
Nevertheless, the science is good whether they cite it or not, and this book is quite a comprehensive primer of plant-based athleticism.
Bottom line: if you’re wondering how to optimize the two goals of “eating plants” and “being a powerful athlete”, then this one’s the book for you.
Click here to check out The Plant-Based Athlete and upgrade your health and athletic performance!
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Body Language (In The Real World)
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Forget What You Think You Know About Body Language
…unless it’s about a specific person whose habits and mannerisms you know intimately, in which case, you probably have enough personal data stored up to actually recognize patterns à la “when my spouse does this, then…”, and probably do know what’s going on.
For everyone else… our body language can be as unique as our idiolect
What’s an idiolect? It’s any one given person’s way of speaking/writing, in their natural state (i.e. without having to adjust their style for some reason, for example in a public-facing role at work, where style often becomes much narrower and more consciously-chosen).
Extreme example first
To give an extreme example of how non-verbal communication can be very different than a person thinks, there’s an anecdote floating around the web of someone whose non-verbal autistic kid would, when he liked someone who was visiting the house, hide their shoes when they were about to leave, to cause them to stay longer. Then one day some relative visited and when she suggested that she “should be going sometime soon”, he hurried to bring her her shoes. She left, happy that the kid liked her (he did not).
The above misunderstanding happened because the visitor had the previous life experience of “a person who brings me things is being helpful, and if they do it of their own free will, it’s because they like me”.
In other words…
Generalizations are often sound… In general
…which does not help us when dealing with individuals, which as it turns out, everyone is.
Clenched fists = tense and angry… Except when it’s just what’s comfortable for someone, or they have circulation issues, or this, or that, or the other.
Pacing = agitated… Except when it’s just someone who finds the body in motion more comfortable
Relaxed arms and hands = at ease and unthreatening… Unless it’s a practitioner of various martial arts for whom that is their default ready-for-action state.
Folded arms = closed-off, cold, distant… Or it was just somewhere to put one’s hands.
Lack of eye contact = deceitful, hiding something… Unless it’s actually for any one of a wide number of reasons, which brings us to our next section:
A liar’s “tells”
Again, if you know someone intimately and know what signs are associated with deceit in them, then great, that’s a thing you know. But for people in general…
A lot of what is repeated about “how to know if someone is lying” has seeped into public consciousness from “what police use to justify their belief that someone is lying”.
This is why many of the traditional “this person is lying” signs are based around behaviors that show up when in fact “this person is afraid, under pressure, and talking to an authority figure who has the power to ruin their life”:
Research on Non-verbal Signs of Lies and Deceit: A Blind Alley
But what about eye-accessing cues? They have science to them, right?
For any unfamiliar: this is about the theory that when we are accessing different parts of our mind (such as memory or creativity, thus truthfulness or lying), our eyes move one way or another according to what faculty we’re accessing.
Does it work? No
But, if you carefully calibrate it for a specific person, such as by asking them questions along the lines of “describe your front door” or “describe your ideal holiday”, to see which ways they look for recall or creativity… Then also no:
The Eyes Don’t Have It: Lie Detection and Neuro-Linguistic Programming
How can we know what non-verbal communication means, then?
With strangers? We can’t, simply. It’s on us to be open-minded, with a healthy balance of optimism and wariness.
With people we know? We can build up a picture over time, learn the person’s patterns. Best of all, we can ask them. In the moment, and in general.
For more on optimizing interpersonal communication, check out:
Save Time With Better Communication
…and the flipside of that:
The Problem With Active Listening (And How To Do It Better)
Take care!
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