Tuna vs Catfish – Which is Healthier?
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Our Verdict
When comparing tuna to catfish, we picked the tuna.
Why?
Today in “that which is more expensive and/or harder to get is not necessarily healthier”…
Looking at their macros, tuna has more protein and less fat (and overall, less saturated fat, and also less cholesterol).
In the category of vitamins, both are good but tuna distinguishes itself: tuna has more of vitamins A, B1, B2, B3, B6, and D, while catfish has more of vitamins B5, B9, B12, E, and K. They are both approximately equal in choline, and as an extra note in tuna’s favor (already winning 6:5), tuna is a very good source of vitamin D, while catfish barely contains any. All in all: a moderate, but convincing, win for tuna.
When it comes to minerals, things are clearer still: tuna has more copper, iron, magnesium, phosphorus, potassium, and selenium, while catfish has more calcium, manganese, and zinc. Oh, and catfish is also higher in one other mineral: sodium, which most people in industrialized countries need less of, on average. So, a 6:3 win for tuna, before we even take into account the sodium content (which makes the win for tuna even stronger).
In short: tuna wins the day in every category!
Want to learn more?
You might like to read:
Farmed Fish vs Wild Caught (It Makes Quite A Difference)
Take care!
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What Mattress Is Best, By Science?
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The Foundations of Good Sleep
You probably know the importance of good sleep for good health. If not, here’s a quick refresher:
- Why You Probably Need More Sleep
- How Sleep-Deprived Are You, Really?
- The 6 Dimensions Of Sleep (And Why They Matter)
You should also definitely check out this quite famous book on the topic:
Why We Sleep – by Dr Matthew Walker
What helps, to get that good sleep
We’ve covered this a little before too, for example:
- Safe Effective Sleep Aids For Seniors
- Sleep Better With Better Air
- How To Nap Like A Pro (No More “Sleep Hangovers”!)
How to level-up from there
One of the biggest barriers to good sleep for many people is obstructive sleep apea:
Healthier, Natural Sleep Without Obstruction!
We covered (in the above article) a whole lot of ways of mitigating/managing obstructive sleep apnea. One of the things we mentioned as beneficial was avoiding sleeping on one’s back, and this is something Mayo Clinic’s Dr. Somers agreed with:
Back Sleeping, And Sleeping Differently After 50
“But side-sleeping is uncomfortable”
If this is you, then chances are you have the wrong mattress.
If your mattress is too firm, you can get around it by using this “five pillow” method:
Click Here If The Embedded Video Doesn’t Load Automatically
If your mattress is too soft, then sorry, you really just have to throw that thing out and start again.
The Goldilocks mattress
While different people will have different subjective preferences, the science is quite clear on what is actually best for people’s spines. As this review of 39 qualified scholarly articles concluded:
❝Results of this systematic review show that a medium-firm mattress promotes comfort, sleep quality and rachis alignment❞
~ Dr. Gianfilippo Caggiari et al.
Read in full: What type of mattress should be chosen to avoid back pain and improve sleep quality? Review of the literature
Note: to achieve “medium-firm” that remains “medium firm” has generally been assumed to require a memory-foam mattress.
How memory-foam works: memory-foam is a moderately thermosoftening material, designed to slightly soften at the touch of human body temperature, and be firmer at room temperature. This will result in it molding itself to the form of a human body, providing what amounts to personalized support for your personal shape and size, meaning your spine can stay exactly as it’s supposed to when you’re sleeping on your side, instead of (for example) your hips being wider meaning that your lumbar vertebrae are raised higher than your thoracic vertebrae, giving you the equivalent of a special nocturnal scoliosis.
It will, therefore, stop working if
- the ambient temperature is comparable to human body temperature (as happens in some places sometimes, and increasingly often these days)
- you die, and thus lose your body temperature (but in that case, your spinal alignment will be the least of your concerns)
Here’s a good explanation of the mechanics of memory foam from the Sleep Foundation:
Sleep Foundation | What is Memory Foam?
An alternative to memory foam?
If you don’t like memory foam (one criticism is that it doesn’t allow good ventilation underneath the body), there is an alterative, the grid mattress.
It’s very much “the new kid on the block” and the science is young for this, but for example this recent (April 2024) study that concluded:
❝The grid mattress is a simple, noninvasive, and nonpharmacological intervention that improved adults sleep quality and health. Controlled trials are encouraged to examine the effects of this mattress in a variety of populations and environments.❞
~ Dr. Heather Hausenblas et al.
Read in full: Effectiveness of a grid mattress on adults’ sleep quality and health: A quasi-experimental intervention study
However, that was a small (n=39) uncontrolled (i.e. there was no control group) study, and the conflict of interest statement is, well, interesting:
❝Heather A. Hausenblas, Stephanie L. Hooper, Martin Barragan, and Tarah Lynch declare no conflict of interest. Michael Breus served as a former consultant for Purple, LLC.❞
~ Ibid.
…which is a fabulous way of distracting from the mention in the “Acknowledgements” section to follow, that…
❝Purple, LLC, provided financial support for the study❞
~ Ibid.
Purple is the company that invented the mattress being tested. So while this doesn’t mean the study is necessarily dishonest and/or corrupt, it does at the very least raise a red flag for a potential instance of publication bias (because Purple may have funded multiple studies and then pulled funding of the ones that weren’t going their way).
If you are interested in Purple’s mattress and how it works, you can check it out here ← this is a link for your interest and information; not an advertisement or an endorsement. We look forward to seeing more science for this though, and echo their own call for randomized controlled trials!
Summary
Sleep is important, and while it’s a popular myth that we need less as we get older, the truth is that we merely get less on average, while still needing the same amount.
A medium-firm memory-foam mattress is a very good, well-evidenced way to support that (both figuratively and literally!).
A grid mattress is an interesting innovation, and/but we’d like to see more science for it.
Take care!
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The Hormone Therapy That Reduces Breast Cancer Risk & More
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The Hormone Balancing Act
We’ve written before about menopausal HRT:
What You Should Have Been Told About Menopause Beforehand
…and even specifically about the considerations when it comes to breast cancer risk:
Menopausal Hormone Replacement Therapy
this really does bear reading, by the way—scroll down to the bit about breast cancer risk, because it’s not a simple increased/decreased risk; it can go either way, and which way it goes will depend on various factors including your medical history and what HRT, if any, you are taking.
Hormone Modulating Therapy
Hormone modulating therapy, henceforth HMT, is something a little different.
Instead of replacing hormones, as hormone replacement therapy does, guess what hormone modulating therapy does instead? That’s right…
MHT can modulate hormones by various means, but the one we’re going to talk about today does it by blocking estrogen receptors,
Isn’t that the opposite of what we want?
You would think so, but since for many people with an increased breast cancer risk, the presence of estrogen increases that risk, which leaves menopausal (peri- or post) people in an unfortunate situation, having to choose between increased breast cancer risk (with estrogen), or osteoporosis and increased dementia risk, amongst other problems (without).
However, the key here (in fact, that’s a very good analogy) is in how the blocker works. Hormones and their receptors are like keys and locks, meaning that the wrong-shaped hormone won’t accidentally trigger it. And when the right-shaped hormone comes along, it gets activated and the message (in this case, “do estrogenic stuff here!” gets conveyed). A blocker is sufficiently similar to fit into the receptor, without being so similar as to otherwise act as the hormone.
In this case, it has been found that HMT blocking estrogen receptors was sufficient to alleviate the breast cancer risk, while also being associated with a 7% lower risk of developing Alzheimer’s disease or related dementias, with that risk reduction being even greater for some demographics depending on race and age. Black women in the 65–74 age bracket enjoyed a 24% relative risk reduction, with white women of the same age getting an 11% relative risk reduction. Black women enjoyed the same benefits after that age, whereas white women starting it at that age did not get the same benefits. The conclusion drawn from this is that it’s good to start this at 65 if relevant and practicable, especially if white, because the protective effect is strongest when gained aged 65–69.
Here’s a pop-science article that goes into the details more deeply than we have room for here:
Hormone therapy for breast cancer linked with lower dementia risk
And here’s the paper itself; we highly recommend reading at least the abstract, because it goes into the numbers in much more detail than we reasonably can here. It’s a huge cohort study of 18,808 women aged 65 years or older, so this is highly relevant data:
Want to learn more?
If you’d like a much deeper understanding of breast cancer risk management, including in the context of hormone therapy, you might like this excellent book that we reviewed recently:
The Smart Woman’s Guide to Breast Cancer – by Dr. Jenn Simmons
Take care!
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The Collagen Cure – by Dr. James DiNicolantonio
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Collagen is vital for, well, most of our bodies, really. Where me most tend to feel its deficiency is in our joints and skin, but it’s critical for bones and many other tissues too.
You may be wondering: why a 572-page book to say what surely must amount to “take collagen, duh”?
Dr. DiNicolantonio has a lot more of value to offer us than that. In this book, we learn about not just collagen synthesis and usage, different types of collagen, the metabolism of it in our diet (if we get it—vegans and vegetarians won’t). We also learn about the building blocks of collagen (vegans and vegetarians do get these, assuming a healthy balanced diet), with a special focus on glycine, the smallest amino acid which makes up about a third of the mass of collagen (a protein).
Not stopping there, we also learn about the interplay of other nutrients with our metabolism of glycine and, if applicable, collagen. Vitamin C and copper are star features, but there’s a lot more going on with other nutrients too, down to the level of “So take this 75 minutes before this but after that and/but definitely not with the other”, etc.
The style is incredibly clear and readable for something that’s also quite scientifically dense (over 1000 references and many diagrams).
Bottom line: if you’re serious about maintaining your body as you get older, and you’d like a book about collagen that’s a lot more helpful than “take collagen, duh”, then this is the book for you.
Click here to check out The Collagen Cure, and take care of yours!
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Cold Weather Health Risks
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Many Are Cold; Few Are Frozen
Many of those of us in the Northern Hemisphere are getting hit with a cold spell around now. How severe that may be depends on more precisely where we are, but it’s affecting a lot of people. So, with apologies to our readers in Australia, we’re going to do a special on that today.
Acute cold is, for most people, good for the health:
A Cold Shower A Day Keeps The Doctor Away?
Persistent cold, not so much. Let’s look at the risks, and what can be done about them…
Hypothermia
It kills. Don’t let it kill you or your loved ones.
And, this is really important: it doesn’t care whether you’re on a mountain or not.
In other words: a lot of people understand (correctly!) that hypothermia is a big risk to hikers, climbers, and the like. But if the heating goes out in your house and the temperature drops for long enough before the heating is fixed, you can get hypothermia there too just the same if you’re not careful.
How cold is too cold? It doesn’t even have to be sub-zero. According to the CDC, temperatures of 4℃ (40℉) can be low enough to cause hypothermia if other factors combine:
CDC | Prevent Hypothermia & Frostbite ← you can also see the list of symptoms to watch out for, there!
Skin health
Not generally an existential risk, but we may as well stay healthy as not!
Cold air often means dry air, so use a moisturizer with an oil base (if you don’t care for fancy beauty products, ordinary coconut oil is top-tier).
Bonus if you do it after a warming bath/shower!
Heart health
Cold has a vasconstricting effect; that is to say, it causes the body’s vasculature to shrink, increasing localized blood pressure. If it’s a cold shower as above, that can be very invigorating. If it’s a week of sub-zero temperatures, it can become a problem.
❝Shoveling a little snow off your sidewalk may not seem like hard work. However, […] combined with the fact that the exposure to cold air can constrict blood vessels throughout the body, you’re asking your heart to do a lot more work in conditions that are diminishing the heart’s ability to function at its best.❞
Source: Snow shoveling, cold temperatures combine for perfect storm of heart health hazards
If you have a heart condition, please do not shovel snow. Let someone else do it, or stay put.
And if you are normally able to exercise safely? Unless you’re sure your heart is in good order, exercising in the warmth, not the cold, seems to be the best bet.
See also: Heart Attack: His & Hers (Be Prepared!) ← can you remember which symptoms are for which sex? If not, now’s a good time to refresh that knowledge.
Immune health
We recently discussed how cold weather indirectly increases the risk of respiratory viral infection:
The Cold Truth About Respiratory Infections
So, now’s the time to be extra on-guard about that.
See also: Beyond Supplements: The Real Immune-Boosters!
Balance
Icy weather increases the risk of falling. If you think “having a fall” is something that happens to other/older people, please remember that there’s a first time for everything. Some tips:
- Walk across icy patches with small steps in a flat-footed fashion like a penguin.
- It may not be glamorous, but neither is going A-over-T and breaking (or even just spraining) things.
- Use a handrail if available, even if you don’t think you need to.
You can also check out our previous article about falling (avoiding falling, minimizing the damage of falling, etc):
Fall Special: Some Fall-Themed Advice
Take care!
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- Walk across icy patches with small steps in a flat-footed fashion like a penguin.
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Pistachios vs Almonds – Which is Healthier?
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Our Verdict
When comparing pistachios to almonds, we picked the almonds.
Why?
It was very close! And those who’ve been following our “This or That” comparisons might be aware that pistachios and almonds have both been winning their respective comparisons with other nuts so far, so today we put them head-to-head.
In terms of macros, almonds have a little more protein and a little more fiber—as well as slightly more fat, though the fats are healthy. Pistachios, meanwhile, are higher in carbs. A moderate win for almonds on the macro front.
When it comes to vitamins, pistachios have more of vitamins A, B1, and B6, while almonds have more of vitamins B2, B3, and E. We could claim a slight victory for pistachios, based on the larger margins, or else a slight victory for almonds, based on vitamin E being a more common nutritional deficiency than vitamin A, and therefore the more useful vitamin to have more of. We’re going to call this category a tie.
In the category of minerals, almonds lead with more calcium, magnesium, manganese, and zinc, while pistachios boast more copper, potassium, and selenium, though the margins are more modest for pistachios. A moderate win for almonds on minerals, therefore.
Adding up the sections gives a win for almonds, but of course, do enjoy both, because both are excellent in their own right.
Want to learn more?
You might like to read:
- Why You Should Diversify Your Nuts!
- Pistachios vs Walnuts – Which is Healthier?
- Almonds vs Cashews – Which is Healthier?
Take care!
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Pomegranate vs Cranberries – Which is Healthier?
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Our Verdict
When comparing pomegranate to cranberries, we picked the pomegranate.
Why?
Starting with the macros: pomegranate has nearly 4x the protein (actually quite a lot for a fruit, but this is not too surprising—it’s because we are eating the seeds!), and slightly more carbs and fiber. Their glycemic indices are comparable, both being low GI foods. While both of these fruits have excellent macro profiles, we say the pomegranate is slightly better, because of the protein, and when it comes to the carbs and fiber, since they balance each other out, we’ll go with the option that’s more nutritionally dense. We like foods that add more nutrients!
In the category of vitamins, pomegranate is higher in vitamins B1, B2, B3, B5, B6, B9, K, and choline, while cranberry is higher in vitamins A, C, and E. Both are very respectable profiles, but pomegranate wins on strength of numbers (and also some higher margins of difference).
When it comes to minerals, it is not close; pomegranate is higher in calcium, copper, iron, magnesium, phosphorus, potassium, selenium, and zinc, while cranberry is higher in manganese. An easy win for pomegranate here.
Both of these fruits have additional “special” properties, though it’s worth noting that:
- pomegranate’s bonus properties, which are too many to list here, but we link to an article below, are mostly in its peel (so dry it, and grind it into a powder supplement, that can be worked into foods, or used like an instant fruit tea, just without the sugar)
- cranberries’ bonus properties (including: famously very good at reducing UTI risk) come with some warnings, including that they may increase the risk of kidney stones if you are prone to such, and also that cranberries have anti-clotting effects, which are great for heart health but can be a risk of you’re on blood thinners or have a bleeding disorder.
You can read about both of these fruits’ special properties in more detail below:
Want to learn more?
You might like to read:
- Health Benefits Of Cranberries (But: You’d Better Watch Out)
- Pomegranate’s Health Gifts Are Mostly In Its Peel
Take care!
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