How Stress Affects Your Body
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Dr. Sharon Bergquist gives us a tour:
Stress, from the inside out
Stress is a natural physical and emotional response to challenges or being overwhelmed. It can be beneficial in short-term situations (e.g. escape from a tiger) but is harmful when prolonged or frequent (e.g. escape the rat-race).
Immediate physiological response: cortisol, adrenaline (epinephrine), and norepinephrine are released by the adrenal glands.
The effects this has (non-exhaustive list; we’re just citing what’s in the video here):
- Cortisol impairs blood vessel function, promoting atherosclerosis.
- Adrenaline increases heart rate and blood pressure, leading to hypertension.
- Stress disrupts the brain-gut connection, causing:
- Digestive issues like irritable bowel syndrome and heartburn.
- Changes in gut bacteria composition, potentially affecting overall health.
- Cortisol increases appetite and cravings for energy-dense “comfort foods”.
- This in turn promotes visceral fat storage, which raises the risk of heart disease and insulin resistance.
- Immune-specific effects:
- Stress hormones initially aid in healing and immune defense.
- Chronic stress weakens immune function (by over-working it constantly), increasing susceptibility to infections and slowing recovery.
- Other systemic effects:
- Chronic stress shortens telomeres, which protect chromosomes. Shortened telomeres accelerate cellular aging.
- Chronic stress can also cause acne, hair loss, sexual dysfunction, headaches, muscle tension, fatigue, irritability, and difficulty concentrating.
So, how to manage this? The video says that viewing stressful situations as controllable challenges, rather than insurmountable threats, leads to better short-term performance and long-term health.
Which would be wonderful, except that usually things are stressful precisely because they are not entirely within the field of our control, and the usual advice is to tend to what we can control, and accept what we can’t.
However… That paradigm still leaves out the very big set of “this might be somewhat within our control or it might not; we really don’t know yet; we can probably impact it but what if we don’t do enough, or take the wrong approach and do the wrong thing? And also we have 17 competing stressors, which ones should we prioritize tending to first, and…” and so on.
To that end, we suggest checking out the “Want to learn more?” link we drop below the video today, as it is about managing stress realistically, in a world that, if we’re honest about it, can sometimes be frankly unmanageable.
Meanwhile, enjoy:
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You might also like to read:
Heart Health vs Systemic Stress ← this is good in and of itself, and also links to other stress-related resources of ours
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Mimosa For Healing Your Body & Mind
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Today we’re looking at mimosa (no relation to the cocktail!), which is a name given to several related plant species that belong to the same genus or general clade, look similar, and have similar properties and behavior.
As a point of interest that’s not useful: mimosa is one of those plants whereby if you touch it, it’ll retract its leaves and shrink away from you. The leaves also droop at nighttime (perfectly healthily; they’re not wilting or anything; this too is just plant movement), and spring back up in the daytime.
So that’s what we mean when we say “and behavior” 😉
Antidepressant & anxiolytic
Mimosa bark and leaves have long been used in Traditional Chinese Medicine, as well as (albeit different species) in the North-East of Brazil, and (again, sometimes different species) in Mexico.
Animal studies, in vivo studies, and clinical practice in humans, have found this to be effective, for example:
❝[Mimosa pudica extract] has anti-anxiety, anti-depressant and memory enhancing activities that are mediated through multiple mechanisms❞
Source: Effects of Mimosa pudica L. leaves extract on anxiety, depression and memory
Research is ongoing with regard to how, exactly, mimosa does what it does. Here’s a paper about another species mimosa:
(notwithstanding the genus name, it’s still part of the mimosa clade)
Anti-inflammatory & analgesic
In this case, mimosa has traditionally been used as a topical tincture (for skin damage of many kinds, ranging from cuts and abrasions to burns to autoimmune conditions and more), so what does the science say about that?
❝In summary, the present study provided evidence that the [mimosa extract], its fractions and the isolated compound sakuranetin showed significant anti-inflammatory and antinociceptive activities❞
Wound healing
About those various skin damages, here’s another application, and a study showing that it doesn’t just make it feel better, it actually helps it to heal, too:
❝Therapeutic effectiveness occurred in all patients of the extract group; after the 8th treatment week, ulcer size was reduced by 92% as mean value in this group, whereas therapeutic effectiveness was observed only in one patient of the control group (chi(2), p=0.0001). No side effects were observed in any patient in either group.❞
Very compelling stats!
Read more: Therapeutic effectiveness of a Mimosa tenuiflora cortex extract in venous leg ulceration treatment
Is it safe?
Yes, for most people, with some caveats:
- this one comes with a clear “don’t take if pregnant or breastfeeding” warning, as for unknown reasons it has caused a high incidence of fetal abnormalities or fetal death in animal studies.
- while the stem bark (the kind used in most mimosa supplements and most readily found online) has negligible psychoactivity, as do many species of mimosa in general, the root of M. tenuiflora has psychedelic effects similar to ayahuasca if taken orally, for example as a decoction, if in the presence of a monoamine oxidase inhibitor (MAOI), as otherwise MAO would metabolize the psychoactive component in the gut before it can enter the bloodstream.
That’s several “ifs”, meaning that the chances of unwanted psychedelic effects are slim if you’re paying attention, but as ever, do check with your doctor/pharmacist to be sure.
Want to try some?
We don’t sell it, but here for your convenience is an example product on Amazon 😎
Enjoy!
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Nonverbal Epiphany – by Dr. Stephen Furlich
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The subtitle of this book, “Steps To Improve Your Nonverbal Communication” suggests that this is principally an instructional book—it’s not. Rather, it’s mostly informational, and it is left to the reader to interpret what to do with that information.
But, what a lot of information!
And well-sourced, too: this book has scientific paper citations at a rate of one or two per page, with many diagrams and infographics too. It is, in effect, a treasure trove of physiological, psychological, and sociological data when it comes to nonverbal communication and the various factors that influence it.
So, what can you hope to gain from this book? A lot of sorting out of science vs suppositions, mostly.
From digit ratios to crossed arms, from eye-contact to attire, do things really mean what we’ve been told they mean?
And if they don’t, will people perceive them that way anyway, or will textbook rules go out the window in a real conversation? How about in real nonverbal interactions?
(What’s a nonverbal interaction? It’s the behavior exhibited between strangers in the street, it’s the impression given and received by your profile picture, things like that).
Bottom line is that this book is data, data, and more data. If ever you wanted to sort the psychology from the pseudoscience, this is the book for you.
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How to Prepare for Your First Therapy Session
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Everyone (who ever has therapy, anyway) has a first therapy session. So, how to make best use of that, and get things going most effectively? Dr. Tori Olds has advice:
Things to prepare
Questions that you should consider, and prepare answers to beforehand, include:
- Why are you here? Not in any deep philosophical sense, but, what brought you to therapy?
- What would you like to focus on? Chances are, you are paying a hefty hourly rate—so having considered this will allow you to get your money’s worth.
- How will you know when you’ve met your goal? Note that this is really two questions in one, because first you need to identify your goal, and then you need to expand on it. If you woke up tomorrow and all your psychological problems were solved, how would you know? What would be different? What does it look like?
If you have a little time between now and your first session, journaling can help a lot.
Remember also that a first therapy session can also be like a mutual interview, to decide whether it’s a good match. Not every therapist is good at their job, and not every therapist will be good for you specifically. Sometimes, a therapist may be a mismatch through no fault of their own. Considering what those reasons might be can also be a good thing to think about in advance, to help find the best therapist for you in fewer tries!
For most on these ideas, enjoy:
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How & Why Non-Sleep Deep Rest Works (And What Activities Trigger The Same State)
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Stress is a natural response that evolved over thousands of years to help humans meet challenges by priming the body and mind for action. However, chronic stress is harmful, as it diverts energy away from essential processes like cell maintenance and repair, leading to deterioration of health (physical and mental).
Counteracting this requires intentional periods of deep rest… But how?
Parasympathetic Response
Practices as diverse as mindfulness meditation, yoga, prayer, tai chi, qigong, knitting, painting, gardening, and sound baths can help induce states of deep rest—these days often called “Non-Sleep Deep Rest” (NSDR), to differentiate it from deep sleep.
How it works: these activities send signals to the brain that the body is safe, initiating biological changes that…
- protect chromosomes from DNA damage
- promote cellular repair, and
- enhance mitochondrial function.
If we then (reasonably!) conclude from this: “so, we must embrace moments of stillness and mindfulness, and allow ourselves to experience the ease and safety of the present”, that may sound a little wishy-washy, but the neurology of it is clear, the consequences of that neurological response on every living cell in the body are also clear, so by doing NSDR (whether by yoga nidra or knitting or something else) we can significantly improve our overall well-being.
Note: the list of activities above is far from exhaustive, but do be aware that this doesn‘t mean any activity you enjoy and do to unwind will trigger NSDR. On the contrary, many activities you enjoy and do to unwind may trigger the opposite, a sympathetic nervous system response—watching television is a common example of this “wrong choice for NSDR”. Sure, it can be absorbing and a distraction from your daily stressors, but it also can be exciting (both cognitively and neurologically and thus also physiologically), which is the opposite of what we want.
For more on all of this, enjoy:
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Want to learn more?
You might also like to read:
Non-Sleep Deep Rest: A Neurobiologist’s Take
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Our Top 5 Spices: How Much Is Enough For Benefits?
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A spoonful of pepper makes the… Hang on, no, that’s not right…
We know that spices are the spice of life, and many have great health-giving qualities. But…
- How much is the right amount?
- What’s the minimum to get health benefits?
- What’s the maximum to avoid toxicity?
That last one always seems like a scary question, but please bear in mind: everything is toxic at a certain dose. Oxygen, water, you-name-it.
On the other hand, many things have a toxicity so low that one could not physically consume it sufficiently faster than the body eliminates it, to get a toxic build-up.
Consider, for example, the €50 banknote that was nearly withdrawn from circulation because one of the dyes used in it was found to be toxic. However, the note remained in circulation after scientists patiently explained that a person would have to eat many thousands of them to get a lethal dose.
So, let’s address these questions in reverse order:
What’s the maximum to avoid toxicity?
In the case of the spices we’ll look at today, the human body generally* has high tolerance for them if eaten at levels that we find comfortable eating.
*IMPORTANT NOTE: If you have (or may have) a medical condition that may be triggered by spices, go easier on them (or if appropriate, abstain completely) after you learn about that.
Check with your own physician if unsure, because not only are we not doctors, we’re specifically not your doctors, and cannot offer personalized health advice.
We’re going to be talking in averages and generalizations here. Caveat consumator.
For most people, unless you are taking the spice in such quantities that you are folding space and seeing the future, or eating them as the main constituents of your meal rather than an embellishment, you should be fine. Please don’t enter a chilli-eating contest and sue us.
What is the minimum to get health benefits and how much should we eat?
The science of physiology generally involves continuous rather than discrete data, so there’s not so much a hard threshold, as a point at which the benefits become significant. The usefulness of most nutrients we consume, be they macro- or micro-, will tend to have a bell curve.
In other words, a tiny amount won’t do much, the right amount will have a good result, and usefulness will tail off after that point. To that end, we’re going to look at the “sweet spot” of peaking on the graph.
Also note: the clinical dose is the dose of the compound, not the amount of the food that one will need to eat to get that dose. For example, food x containing compound y will not usually contain that compound at 100% rate and nothing else. We mention this so that you’re not surprised when we say “the recommended dose is 5mg of compound, so take a teaspoon of this spice”, for example.
Further note: we only have so much room here, so we’re going to list only the top benefits, and not delve into the science of them. You can see the related main features for more details, though!
The “big 5” health-giving spices, with their relevant active compound:
- Black pepper (piperine)
- Hot pepper* (capsaicin)
- Garlic (allicin)
- Ginger (gingerol)
- Turmeric (curcumin**)
*Cayenne pepper is very high in capsaicin; chilli peppers are also great
**not the same thing as cumin, which is a completely different plant. Cumin does have some health benefits of its own, but not in the same league as the spices above, and there’s only so much we have room to cover today.
Black pepper
- Benefits: antioxidant, anti-cancer, boosts bioavailability of other nutrients, aids digestion
- Dosage: 5–20mg for benefits
- Suggestion: ½ teaspoon of black pepper is sufficient for benefits. However, this writer’s kitchen dictum in this case is “if you can’t see the black pepper in/on the food, add more”—but that’s more about taste!
- Related main feature: Black Pepper’s Anti-Cancer Arsenal (And More)
Hot Pepper
- Benefits: anti-inflammatory, metabolism accelerator
- Dosage: 6mg gives benefits, 500mg is a common dose in capsules
- Suggestion: if not making a spicy dish, consider using a teaspoon of cayenne as part of the seasoning for rice or potatoes
- Related main feature: Capsaicin For Weight Loss And Against Inflammation
Garlic
- Benefits: heart health, blood sugar balancing, anti-cancer
- Dosage: 4–8µg for benefits
- Suggestion: 1–2 cloves daily is generally good. However, cooking reduces allicin content (and so does oxidation after cutting/crushing), so you may want to adjust accordingly if doing those things.
- Related main feature: The Many Health Benefits Of Garlic
Ginger
- Benefits: anti-inflammatory, antioxidant, anti-nausea
- Dosage: 3–4g for benefits
- Suggestion: 1 teaspoon grated raw ginger or ½ a teaspoon powdered ginger, can be used in baking or as part of the seasoning for a stir-fry
- Related main feature: Ginger Does A Lot More Than You Think
Turmeric
- Benefits: anti-inflammatory, anti-cancer
- Dosage: 500–2000mg for benefits
- Suggestion: ¼ teaspoon per day is sufficient for benefits; ½ teaspoon dropped into the water when cooking rice will infuse the rice with turmeric (which is very water-soluble), turn the rice a pretty golden color, and not affect the flavor. Throw in some black pepper as it increases the bioavailability of curcumin up to 2000%
- Related main feature: Why Curcumin (Turmeric) Is Worth Its Weight In Gold
Closing notes
The above five spices are very healthful for most people. Personal physiology can and will vary, so if in doubt, a) check with your doctor b) start at lowest doses and establish your tolerance (or lack thereof).
Enjoy, and stay well!
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Is stress turning my hair grey?
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When we start to go grey depends a lot on genetics.
Your first grey hairs usually appear anywhere between your twenties and fifties. For men, grey hairs normally start at the temples and sideburns. Women tend to start greying on the hairline, especially at the front.
The most rapid greying usually happens between ages 50 and 60. But does anything we do speed up the process? And is there anything we can do to slow it down?
You’ve probably heard that plucking, dyeing and stress can make your hair go grey – and that redheads don’t. Here’s what the science says.
Oksana Klymenko/Shutterstock What gives hair its colour?
Each strand of hair is produced by a hair follicle, a tunnel-like opening in your skin. Follicles contain two different kinds of stem cells:
- keratinocytes, which produce keratin, the protein that makes and regenerates hair strands
- melanocytes, which produce melanin, the pigment that colours your hair and skin.
There are two main types of melanin that determine hair colour. Eumelanin is a black-brown pigment and pheomelanin is a red-yellow pigment.
The amount of the different pigments determines hair colour. Black and brown hair has mostly eumelanin, red hair has the most pheomelanin, and blonde hair has just a small amount of both.
So what makes our hair turn grey?
As we age, it’s normal for cells to become less active. In the hair follicle, this means stem cells produce less melanin – turning our hair grey – and less keratin, causing hair thinning and loss.
As less melanin is produced, there is less pigment to give the hair its colour. Grey hair has very little melanin, while white hair has none left.
Unpigmented hair looks grey, white or silver because light reflects off the keratin, which is pale yellow.
Grey hair is thicker, coarser and stiffer than hair with pigment. This is because the shape of the hair follicle becomes irregular as the stem cells change with age.
Interestingly, grey hair also grows faster than pigmented hair, but it uses more energy in the process.
Can stress turn our hair grey?
Yes, stress can cause your hair to turn grey. This happens when oxidative stress damages hair follicles and stem cells and stops them producing melanin.
Oxidative stress is an imbalance of too many damaging free radical chemicals and not enough protective antioxidant chemicals in the body. It can be caused by psychological or emotional stress as well as autoimmune diseases.
Environmental factors such as exposure to UV and pollution, as well as smoking and some drugs, can also play a role.
Melanocytes are more susceptible to damage than keratinocytes because of the complex steps in melanin production. This explains why ageing and stress usually cause hair greying before hair loss.
Scientists have been able to link less pigmented sections of a hair strand to stressful events in a person’s life. In younger people, whose stems cells still produced melanin, colour returned to the hair after the stressful event passed.
4 popular ideas about grey hair – and what science says
1. Does plucking a grey hair make more grow back in its place?
No. When you pluck a hair, you might notice a small bulb at the end that was attached to your scalp. This is the root. It grows from the hair follicle.
Plucking a hair pulls the root out of the follicle. But the follicle itself is the opening in your skin and can’t be plucked out. Each hair follicle can only grow a single hair.
It’s possible frequent plucking could make your hair grey earlier, if the cells that produce melanin are damaged or exhausted from too much regrowth.
2. Can my hair can turn grey overnight?
Legend says Marie Antoinette’s hair went completely white the night before the French queen faced the guillotine – but this is a myth.
It is not possible for hair to turn grey overnight, as in the legend about Marie Antoinette. Yann Caradec/Wikimedia, CC BY-NC-SA Melanin in hair strands is chemically stable, meaning it can’t transform instantly.
Acute psychological stress does rapidly deplete melanocyte stem cells in mice. But the effect doesn’t show up immediately. Instead, grey hair becomes visible as the strand grows – at a rate of about 1 cm per month.
Not all hair is in the growing phase at any one time, meaning it can’t all go grey at the same time.
3. Will dyeing make my hair go grey faster?
This depends on the dye.
Temporary and semi-permanent dyes should not cause early greying because they just coat the hair strand without changing its structure. But permanent products cause a chemical reaction with the hair, using an oxidising agent such as hydrogen peroxide.
Accumulation of hydrogen peroxide and other hair dye chemicals in the hair follicle can damage melanocytes and keratinocytes, which can cause greying and hair loss.
4. Is it true redheads don’t go grey?
People with red hair also lose melanin as they age, but differently to those with black or brown hair.
This is because the red-yellow and black-brown pigments are chemically different.
Producing the brown-black pigment eumelanin is more complex and takes more energy, making it more susceptible to damage.
Producing the red-yellow pigment (pheomelanin) causes less oxidative stress, and is more simple. This means it is easier for stem cells to continue to produce pheomelanin, even as they reduce their activity with ageing.
With ageing, red hair tends to fade into strawberry blonde and silvery-white. Grey colour is due to less eumelanin activity, so is more common in those with black and brown hair.
Your genetics determine when you’ll start going grey. But you may be able to avoid premature greying by staying healthy, reducing stress and avoiding smoking, too much alcohol and UV exposure.
Eating a healthy diet may also help because vitamin B12, copper, iron, calcium and zinc all influence melanin production and hair pigmentation.
Theresa Larkin, Associate Professor of Medical Sciences, University of Wollongong
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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