The Lymphatic System Against Cancer & More
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Ask Not What Your Lymphatic System Can Do For You…
Just kidding; we’ll cover that first, as it’s definitely not talked about enough.
The lymphatic system is the system in the body that moves lymph around. It’s made of glands, nodes, and vessels:
- The glands (such as the tonsils and the adenoids) and nodes filter out bacteria and produce white blood cells. Specific functions may be, well, specialized—beyond the scope of today’s article—but that’s the broad function.
- The vessels are the tubes that allow those things to be moved around, suspended in lymph.
What’s lymph? It’s a colorless water-like liquid that transports immune cells, nutrients (and waste) around the body (through the lymphatic system).
Yes, it works alongside your vasculature; when white blood cells aren’t being deployed en masse into your bloodstream to deal with some threat, they’re waiting in the wings in the lymphatic system.
While your blood is pumped around by your heart, lymph moves based on a variety of factors, including contractions of small specialized lymphatic muscles, the pressure gradient created by the combination of those and gravity, and the movements of your body itself.
Here’s a larger article than we have room for, with diagrams we also don’t have room for:
Modelling the lymphatic system
To oversimplify it in few words for the sake of moving on: you can most of the time: think of it as an ancillary network supporting your circulatory system that unlike blood, doesn’t deal with oxygen or sugars, but does deal with a lot of other things, including:
- water and salt balance
- immune cells and other aspects of immune function
- transports fats (and any fat-soluble vitamins in them) into circulation
- cleans up stuff that gets stuck between cells
- general detoxification
There’s a lot that can go wrong if lymph isn’t flowing as it should
Too much to list here, but to give an idea:
- Arthritis and many autoimmune diseases
- Cardiovascular disease and metabolic syndrome
- Obesity, diabetes, and organ failure
- Alzheimer’s and other dementias
- Lymphadenitis, lymphangitis, and lymphedenopathy
- Lymphomas and Hodgkin’s disease (both are types of lymphatic cancer)
- Cancers of other kinds, because of things not being cleaned up where and when they should be
Yikes! That’s a lot of important things for a mostly-forgotten system to be taking care of protecting us from!
What you can do for your lymphatic system, to avoid those things!
Happily, there are easy things we can do to give our lymph some love, such as:
Massage therapy (and foam rolling)
This is the go-to that many people/publications recommend. It’s good! It’s certainly not the most important thing to do, but it’s good.
You can even use a simple gadget like this one to help move the lymph around, without needing to learn arcane massage techniques.
Exercise (move your body!)
This is a lot more important. The more we move our body, the more lymph moves around. The more lymph moves around today, the more easily it will move around tomorrow. A healthy constant movement of lymph throughout the lymphatic system is key to keeping everything running smoothly.
If you pick only one kind of exercise, make it High-Intensity Interval Training (HIIT):
How To Do HIIT (Without Wrecking Your Body)
If for some reason you really can’t do that, just spend as much of your waking time as reasonably possible, moving, per:
For ideas on how to do that, check out…
Get thee to a kitchen
This is about getting healthy food that gives your body’s clean-up crew (the lymphatic system) an easier time of it.
Rather than trying to “eat clean” which can be a very nebulous term and it’s often not at all clear (and/or hotly debated) what counts as “clean”, instead, stick to foods that constitute an anti-inflammatory diet:
Take care!
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How To Keep Your Mind From Wandering
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Whether your mind keeps wandering more as you get older, or you’re a young student whose super-active brain is more suited to TikTok than your assigned reading, sustained singular focus can be a challenge for everyone—and yet (alas!) it remains a required skill for so much in life.
Today’s edition of 10Almonds presents a nifty trick to get yourself through those tasks! We’ll also be taking some time to reply to your questions and comments, in our weekly interactive Q&A.
First of all though, we’ve a promise to make good on, so…
How To Stay On The Ball (Or The Tomato?) The Easy Way
For most of us, we face three main problems when it comes to tackling our to-dos:
- Where to start?
- The task seems intimidating in its size
- We get distracted and/or run out of energy
If you’re really not sure where to start, we recommended a powerful tool in last Friday’s newsletter!
For the rest, we love the Pomodoro Technique:
- Set a timer for 25 minutes, and begin your task.
- Keep going until the timer is done! No other tasks, just focus.
- Take a 5-minute break.
- Repeat
This approach has three clear benefits:
- No matter the size of the task, you are only committing to 25 minutes—everything is much less overwhelming when there’s an end in sight!
- Being only 25 minutes means we are much more likely to stay on track; it’s easier to defer other activities if we know that there will be a 5-minute break for that soon.
- Even without other tasks to distract us, it can be difficult to sustain attention for long periods; making it only 25 minutes at a time allows us to approach it with a (relatively!) fresh mind.
Have you heard that a human brain can sustain attention for only about 40 minutes before focus starts to decline rapidly?
While that’s been a popular rationale for school classroom lesson durations (and perhaps coincidentally ties in with Zoom’s 40-minute limit for free meetings), the truth is that focus starts dropping immediately, to the point that one-minute attention tests are considered sufficient to measure the ability to focus.
So a 25-minute Pomodoro is a more than fair compromise!
Why’s it called the “Pomodoro” technique?
And why is the 25-minute timed work period called a Pomodoro?
It’s because back in the 80s, university student Francesco Cirillo was struggling to focus and made a deal with himself to focus just for a short burst at a time—and he used a (now “retro” style) kitchen timer in the shape of a tomato, or “pomodoro”, in Italian.
If you don’t have a penchant for kitsch kitchenware, you can use this free, simple Online Pomodoro Timer!
(no registration/login/download necessary; it’s all right there on the web page)
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Body Scrubs: Benefits, Risks, and Guidance
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I was wondering whether I should be using a body scrub in the shower, rather than just soap. What should guide me in the choice of a body scrub, and are there any risks to be aware of?❞
Body scrubs are great for giving skin a healthy glow, but are best used sparingly—over-exfoliation leads to the opposite effect (unhappy skin, premature skin aging, etc).
As for contents:
- microplastics are now banned in most places, but you might want to check any products (and their containers!) are BPA-free, pthalate free, etc.
- fragrances in body scrubs are usually a bad idea, and many essential oils have been shown to be endocrine-disruptors, which you do not want:
About the microplastics, harmful artificial chemicals in general, and what constitutes “etc”:
About the fragrances’ (including “natural” essential oils’) endocrine-disrupting shenanigans:
Endocrine-disrupting chemicals: an Endocrine Society scientific statement
So, what might you want to use instead?
If you’re feeling adventurous, you might like to try treating yourself to a pineapple-based mask instead (a muslin cloth soaked in pineapple juice will work just fine; please don’t waterboard yourself though), as the bromelain enzymes (found very generously in pineapple juice) break down dead cells without the need for scrubbing.
Another option is a homemade salt- or sugar-scrub. Put your salt or sugar into a jar, add enough warm water to cover it, leave it for about a day, adding more water if it seems in danger of drying out, until it recrystallizes with a high water content keeping it malleable to the touch; congratulations, you now have a very simple scrub. This should still not be used more than, say, once per week, though.
Last but not least, you might consider investing in a konjac sponge; they gently remove dead skin without damaging living skin. Here’s an example product on Amazon, for your convenience
For more on gentle-yet-effective skincare, you might like to read:
Clean: The New Science of Skin and the Beauty of Doing Less
Enjoy!
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Getting Flexible, Starting As An Adult: How Long Does It Really Take?
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Aleks Brzezinska didn’t start stretching until she was 21, and here’s what she found:
We’ll not stretch the truth
A lot of stretching programs will claim “do the splits in 30 days” or similar, and while this may occasionally be true, usually it’ll take longer.
Brzezinska started stretching seriously when she was 21, and made significant flexibility gains between the ages of 21 and 23 with consistent practice. Since then, she’s just maintained her flexibility.
There are facts that affect progress significantly, such as:
- Anatomy: body structure, age, and joint flexibility do influence flexibility; starting younger and/or having hypermobile joints does make it easier.
- Consistency: regular practice (2–3 times a week) is crucial, but avoid overdoing it, especially when sore.
- Lifestyle: weightlifting, running, and similar activities can tighten muscles, making flexibility harder to achieve.
- Hydration: staying hydrated is important for muscle flexibility.
She also recommends incorporating a variety of different stretching types, rather than just one method, for example passive stretching, active stretching, Proprioceptive Neuromuscular Facilitation (PNF) stretching, and mobility work.
For more on each of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like:
Jasmine McDonald’s Ballet Stretching Routine
Take care!
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A short history of sunscreen, from basting like a chook to preventing skin cancer
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Australians have used commercial creams, lotions or gels to manage our skin’s sun exposure for nearly a century.
But why we do it, the preparations themselves, and whether they work, has changed over time.
In this short history of sunscreen in Australia, we look at how we’ve slathered, slopped and spritzed our skin for sometimes surprising reasons.
At first, suncreams helped you ‘tan with ease’
This early sunscreen claimed you could ‘tan with ease’.
Trove/NLASunscreens have been available in Australia since the 30s. Chemist Milton Blake made one of the first.
He used a kerosene heater to cook batches of “sunburn vanishing cream”, scented with French perfume.
His backyard business became H.A. Milton (Hamilton) Laboratories, which still makes sunscreens today.
Hamilton’s first cream claimed you could “
Sunbathe in Comfort and TAN with ease”. According to modern standards, it would have had an SPF (or sun protection factor) of 2.The mirage of ‘safe tanning’
A tan was considered a “modern complexion” and for most of the 20th century, you might put something on your skin to help gain one. That’s when “safe tanning” (without burning) was thought possible.
This 1967 Coppertone advertisement urged you to ‘tan, not burn’.
SenseiAlan/Flickr, CC BY-SASunburn was known to be caused by the UVB component of ultraviolet (UV) light. UVA, however, was thought not to be involved in burning; it was just thought to darken the skin pigment melanin. So, medical authorities advised that by using a sunscreen that filtered out UVB, you could “safely tan” without burning.
But that was wrong.
From the 70s, medical research suggested UVA penetrated damagingly deep into the skin, causing ageing effects such as sunspots and wrinkles. And both UVA and UVB could cause skin cancer.
Sunscreens from the 80s sought to be “broad spectrum” – they filtered both UVB and UVA.
Researchers consequently recommended sunscreens for all skin tones, including for preventing sun damage in people with dark skin.
Delaying burning … or encouraging it?
Up to the 80s, sun preparations ranged from something that claimed to delay burning, to preparations that actively encouraged it to get that desirable tan – think, baby oil or coconut oil. Sun-worshippers even raided the kitchen cabinet, slicking olive oil on their skin.
One manufacturer’s “sun lotion” might effectively filter UVB; another’s merely basted you like a roast chicken.
Since labelling laws before the 80s didn’t require manufacturers to list the ingredients, it was often hard for consumers to tell which was which.
At last, SPF arrives to guide consumers
In the 70s, two Queensland researchers, Gordon Groves and Don Robertson, developed tests for sunscreens – sometimes experimenting on students or colleagues. They printed their ranking in the newspaper, which the public could use to choose a product.
An Australian sunscreen manufacturer then asked the federal health department to regulate the industry. The company wanted standard definitions to market their products, backed up by consistent lab testing methods.
In 1986, after years of consultation with manufacturers, researchers and consumers, Australian Standard AS2604 gave a specified a testing method, based on the Queensland researchers’ work. We also had a way of expressing how well sunscreens worked – the sun protection factor or SPF.
This is the ratio of how long it takes a fair-skinned person to burn using the product compared with how long it takes to burn without it. So a cream that protects the skin sufficiently so it takes 40 minutes to burn instead of 20 minutes has an SPF of 2.
Manufacturers liked SPF because businesses that invested in clever chemistry could distinguish themselves in marketing. Consumers liked SPF because it was easy to understand – the higher the number, the better the protection.
Australians, encouraged from 1981 by the Slip! Slop! Slap! nationwide skin cancer campaign, could now “slop” on a sunscreen knowing the degree of protection it offered.
How about skin cancer?
It wasn’t until 1999 that research proved that using sunscreen prevents skin cancer. Again, we have Queensland to thank, specifically the residents of Nambour. They took part in a trial for nearly five years, carried out by a research team led by Adele Green of the Queensland Institute of Medical Research. Using sunscreen daily over that time reduced rates of squamous cell carcinoma (a common form of skin cancer) by about 60%.
Follow-up studies in 2011 and 2013 showed regular sunscreen use almost halved the rate of melanoma and slowed skin ageing. But there was no impact on rates of basal cell carcinoma, another common skin cancer.
By then, researchers had shown sunscreen stopped sunburn, and stopping sunburn would prevent at least some types of skin cancer.
What’s in sunscreen today?
An effective sunscreen uses one or more active ingredients in a cream, lotion or gel. The active ingredient either works:
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“chemically” by absorbing UV and converting it to heat. Examples include PABA (para-aminobenzoic acid) and benzyl salicylate, or
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“physically” by blocking the UV, such as zinc oxide or titanium dioxide.
Physical blockers at first had limited cosmetic appeal because they were opaque pastes. (Think cricketers with zinc smeared on their noses.)
With microfine particle technology from the 90s, sunscreen manufacturers could then use a combination of chemical absorbers and physical blockers to achieve high degrees of sun protection in a cosmetically acceptable formulation.
Where now?
Australians have embraced sunscreen, but they still don’t apply enough or reapply often enough.
Although some people are concerned sunscreen will block the skin’s ability to make vitamin D this is unlikely. That’s because even SPF50 sunscreen doesn’t filter out all UVB.
There’s also concern about the active ingredients in sunscreen getting into the environment and whether their absorption by our bodies is a problem.
Sunscreens have evolved from something that at best offered mild protection to effective, easy-to-use products that stave off the harmful effects of UV. They’ve evolved from something only people with fair skin used to a product for anyone.
Remember, slopping on sunscreen is just one part of sun protection. Don’t forget to also slip (protective clothing), slap (hat), seek (shade) and slide (sunglasses).
Laura Dawes, Research Fellow in Medico-Legal History, Australian National University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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What Harm Can One Sleepless Night Do?
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We’ll not bury the lede: a study found that just one night of 24-hour sleep deprivation can alter immune cell profiles in young, lean, healthy people to resemble those of people with obesity and chronic inflammation.
Chronic inflammation, in turn, causes very many other chronic diseases, and worsens most of the ones it doesn’t outright cause.
The reason this happens is because in principle, inflammation is supposed to be good for us—it’s our body’s defenses coming to the rescue. However, if we imagine our immune cells as firefighters, then compare:
- A team of firefighters who are in great shape and ready to deploy at a moment’s notice, are mostly allowed to rest, sometimes get training, and get called out to a fire from time time, just enough to keep them on their toes. Today, something in your house caught fire, and they showed up in 5 minutes and put it out safely.
- A team of firefighters who have been pulling 24-hour shifts every day for the past 20 years, getting called out constantly for lost cats, burned toast, wrong numbers, the neighbor’s music, a broken fridge, and even the occasional fire. Today, your printer got jammed so they broke down your door and also your windows just for good measure, and blasted your general desk area with a fire hose, which did not resolve the problem but now your computer itself is broken.
Which team would you rather have?
The former team is a healthy immune system; the latter is the immune system of someone with chronic inflammation.
But if it’s one night, it’s not chronic, right?
Contingently true. However, the problem is that because the immune profile was made to be like the bad team we described (imagine that chaos in your house, now remember that for this metaphor, it’s your body that that’s happening to), the immediate strong negative health impact will already have knock-on effects, which in turn make it more likely that you’ll struggle to get your sleep back on track quickly.
For example, the next night you may oversleep “to compensate”, but then the following day your sleep schedule is now slid back considerably; one thing leads to another, and a month later you’re thinking “I really must sort my sleep out”.
See also: How Regularity Of Sleep Can Be Even More Important Than Duration ← A recent, large (n=72,269) 8-year prospective* observational study of adults aged 40-79 found a strong association between irregular sleep and major cardiovascular events, to such an extent that it was worse than undersleeping.
*this means they started the study at a given point, and measured what happened for the next eight years—as opposed to a retrospective study, which would look at what had happened during the previous 8 years.
What about sleep fragmentation?
In other words: getting sleep, but heavily disrupted sleep.
The answer is: basically the same deal as with missed sleep.
Specifically, elevated proinflammatory cytokines (in this context, that’s bad) and an increase in nonclassical monocytes—as are typically seen in people with obesity and chronic inflammation.
Remember: these were young, lean, healthy participants going into the study, who signed up for a controlled sleep deprivation experiment.
This is important, because the unhealthy inflammatory profile means that people with such are a lot more likely to develop diabetes, heart disease, Alzheimer’s, and many more things besides. And, famously, most people in the industrialized world are not sleeping that well.
Even amongst 10almonds readers, a health-conscious demographic by nature, 62% of 10almonds readers do not regularly get the prescribed 7–9 hours sleep (i.e. they get under 7 hours).
You can see the data on this one, here: Why You Probably Need More Sleep ← yes, including if you are in the older age range; we bust that myth in the article too!*
*Unless you have a (rare!) mutated ADRB1 gene, which reduces that. But we also cover that in the article, and how to know whether you have it.
With regard to “most people in the industrialized world are not sleeping that well”, this means that most people in the industrialized world are subject to an unseen epidemic of sleep-deprivation-induced inflammation that is creating vulnerability to many other diseases. In short, the lifestyle of the industrialized world (especially: having to work certain hours) is making most of the working population sick.
Dr. Fatema Al-Rashed, lead researcher, concluded:
❝In the long term, we aim for this research to drive policies and strategies that recognize the critical role of sleep in public health.
We envision workplace reforms and educational campaigns promoting better sleep practices, particularly for populations at risk of sleep disruption due to technological and occupational demands.
Ultimately, this could help mitigate the burden of inflammatory diseases like obesity, diabetes, and cardiovascular diseases.❞
You can read the paper in full here: Impact of sleep deprivation on monocyte subclasses and function
What can we do about it?
With regard to sleep, we’ve written so much about this, but here are three key articles that contain a lot of valuable information:
- Get Better Sleep: Beyond The Basics
- Calculate (And Enjoy) The Perfect Night’s Sleep
- Safe Effective Sleep Aids For Seniors
…and with regard to inflammation, a good concise overview of how to dial it down is:
How To Prevent Or Reduce Inflammation
Take care!
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Beat The Heat, With Fat
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Surviving Summer
Summer is upon us, for those of us in the Northern Hemisphere anyway, and given that nowadays each year tends to be hotter than the one before, on average, it pays to be prepared.
We’ve talked about dealing with the heat before:
Sun, Sea, And Sudden Killers To Avoid
All the above advice stands this summer too, but today we’re going to speak a little extra on not having a “default body”.
For much of medical literature and common health advice, the default body is that of a slim and/or athletic white cis man aged 25–35 with no disabilities.
When it comes to “women’s health”, this is often confined to “the bikini zone” and everything else is commonly treated based on research conducted with men.
Today we’ll be looking at a particular challenge for a wide variety of people, when it comes to heat…
Beating the heat, with fat
If you are fat, and/or have a bit of a tummy, and/or have breasts, this one’s for you.
Fat acts as an insulator, which naturally does no favors in hot weather. Carrying the weight around is also extra exercise, which also becomes a problem in hot weather. Fat people usually sweat more than thin people do, as a result.
Sweat is great for cooling down the body, because it takes heat with it when it evaporates off. However, that only works if it can evaporate off, and it can’t evaporate off if it’s trapped in a skin fold / fat roll.
If you’re fat, you may have plenty of those; if you have a bit of a tummy (if you’re not fat generally, this might be a leftover from pregnancy, or weight loss, or something else; how it got there doesn’t matter for our purposes today), you’ll have at least one under it, and if you have breasts, unless they’re quite small, you’ll have one under each breast, and potentially your cleavage may become an issue too.
Note: if you are perhaps a man who has fat in the place where breasts go, then medically this goes for you too, except that there’s not a societal expectation that you wear bra. Use today’s information as you see fit.
Sweat-wicking hacks
We don’t want sweat to stay in those folds—both because then it’s not doing its cooling-down job, and also, because it can cause a rash, and even yeast infections and/or bacterial infections.
So, we want there to be some barrier there. You could use something like vaseline or baby powder, as to prevent chafing, but fat better (more effective, and less messy) is to have some kind of cloth there that can wick the sweat away.
There are made-for-purpose curved cotton bands that exist, called “tummy liners”; here’s an example product on Amazon, or you could make your own if you’re so inclined. They’re breathable, absorbent, and reduce friction too, making everything a lot more comfortable.
And for breasts? Same deal, there are made-for-purpose cotton bra-liners that exist; here’s an example product on Amazon, or again, you could make your own if you feel so inclined. The important part is that it makes things so much comfortable, because let’s face it: wearing a bra in the summer is not comfortable.
So with these, it can become more comfortable (and the cotton liners are flat, so they’re not visible if one’s wearing a t-shirt or similar-coverage garment). You could go braless, of course, but then you’re back to having sweaty folds, so if you’re doing something other than swimming or lying on your back, you might want something there.
Different hydration rules
“People should drink this much per day” and guess what, those guidelines were based on, drumroll please, not fat people.
Sweating more means needing to hydrate more, and even without breaking a sweat, having a larger body than average (be it muscle, fat, or both) means having more body to hydrate. That’s simple math.
So instead, a good general guideline is half an ounce of water per your weight in pounds, per day:
How much water do I need each day?
Another good general guideline is to simply drink “little and often”, that is to say, always have a (hydrating!) drink on the go.
Take care!
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