Gut Health 2.0
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Gene Expression & Gut Health
This is Dr. Tim Spector. After training in medicine and becoming a consultant rheumatologist, he’s turned his attention to medical research, and is these days a specialist in twin studies, genetics, epigenetics, microbiome, and diet.
What does he want us to know?
For one thing: epigenetics are for more than just getting your grandparents’ trauma.
More usefully: there are things we can do to improve epigenetic factors in our body
DNA is often seen as the script by which our body does whatever it’s going to do, but it’s only part of the story. Thinking of DNA as some kind of “magical immutable law of reality” overlooks (to labor the metaphor) script revisions, notes made in the margins, directorial choices, and ad-lib improvizations, as well as the quality of the audience’s hearing and comprehension.
Hence the premise of one of Dr. Spector’s older books, “Identically Different: Why We Can Change Our Genes”
(*in fact, it was his first, from all the way back in 2013, when he’d only been a doctor for 34 years)
Gene expression will trump genes every time, and gene expression is something that can often be changed without getting in there with CRISPR / a big pair of scissors and some craft glue.
How this happens on the micro level is beyond the scope of today’s article; part of it has to do with enzymes that get involved in the DNA transcription process, and those enzymes in turn are despatched or not depending on hormonal messaging—in the broadest sense of “hormonal”; all the body’s hormonal chemical messengers, not just the ones people think of as hormones.
However, hormonal messaging (of many kinds) is strongly influenced by something we can control relatively easily with a little good (science-based) knowledge: the gut.
The gut, the SAD, and the easy
In broad strokes: we know what is good for the gut. We’ve written about it before at 10almonds:
Making Friends With Your Gut (You Can Thank Us Later)
This is very much in contrast with what in scientific literature is often abbreviated “SAD”, the Standard American Diet, which is very bad for the gut.
However, Dr. Spector (while fully encouraging everyone to enjoy an evidence-based gut-healthy diet) wanted to do one better than just a sweeping one-size-fits-all advice, so he set up a big study with 15,000 identical twins; you can read about it here: TwinsUK
The information that came out of that was about a lot more than just gene expression and gut health, but it did provide the foundation for Dr. Spector’s next project, ZOE.
ZOE crowdsources huge amounts of data including individual metabolic responses to standardized meals in order to predict personalized food responses based on individual biology and unique microbiome profile.
In other words, it takes the guesswork out of a) knowing what your genes mean for your food responses b) tailoring your food choices with your genetic expression in mind, and c) ultimately creating a positive feedback loop to much better health on all levels.
Now, this is not an ad for ZOE, but if you so wish, you can…
- Get the free ZOE gut health guide (this is good, but generic, gut health information)
- Take the ZOE home gut health test (quiz followed by offers of lab tests)
- Browse the ZOE Health Academy, its education wing
Want to know more?
Dr. Spector has a bunch of books out, including some that we’ve reviewed previously:
- Spoon-Fed: Why Almost Everything We’ve Been Told About Food Is Wrong
- The Diet Myth: The Real Science Behind What We Eat
- Food for Life: The New Science of Eating Well
You can also check out our own previous main feature, which wasn’t about Dr. Spector’s work but was very adjacent:
The Brain-Gut Highway: A Two-Way Street
Enjoy!
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Healthy Habits for Managing & Reversing Prediabetes – by Dr. Marie Feldman
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The book doesn’t assume prior knowledge, and does explain the science of diabetes, prediabetes, the terms and the symptoms, what’s going on inside, etc—before getting onto the main meat of the book, the tips.
The promised 100 tips are varied in their application; they range from diet and exercise, to matters of sleep, stress, and even love.
There are bonus tips too! For example, an appendix covers “tips for healthier eating out” (i.e. in restaurants etc) and a grocery list to ensure your pantry is good for defending you against prediabetes.
The writing style is very accessible pop-science; this isn’t like reading some dry academic paper—though it does cite its sources for claims, which we always love to see.
Bottom line: if you’d like to proof yourself against prediabetes, and are looking for “small things that add up” habits to get into to achieve that, this book is an excellent first choice.
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Longevity for the Lazy – by Dr. Richard Malish
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There are some people who devote all their resources to longevity, which can become a full-time occupation, not to mention a very expensive endeavor. This book’s for those who want to get the best possible “bang for buck” by doing the things that have the most favorable cost:worth ratio.
Dr. Malish covers what can be done easily for personal longevity, as well as what technological advances can be enjoyed that those before us didn’t have as options. He also discusses the diseases that are most likely to kill us, and how to avoid those.
He preaches a proactive approach, but one that is simple and consistent and based in good science, and good statistics. Indeed, while he’s served 20 years as an army doctor and a cardiologist, he now works as a healthcare policy consultant, so he is well-placed to advise.
The style of the book is halfway between regular pop-science and a textbook; you can either read it cover-to-cover, or skim first though the key points, highlight boxes, summaries, and the like. He also provides a time-phased task list, for those who like things to be laid out like that.
Bottom line: this is a very good, methodical guide to living longer without making it a full-time occupation.
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Overdone It? How To Speed Up Recovery After Exercise
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How To Speed Up Recovery After A Workout (According To Actual Science)
Has your enthusiasm ever been greater than your ability, when it comes to exercise?
Perhaps you leapt excitedly into a new kind of exercise, or maybe you made a reprise of something you used to do, and found out the hard way you’re not in the same condition you used to be?
If you’ve ever done an exercise session and then spent the next three days recovering, this one’s for you. And if you’ve never done that? Well, prevention is better than cure!
Post-exercise stretching probably won’t do much to help
If you like to stretch after a workout, great, don’t let us stop you. Stretching is, generally speaking, good.
But: don’t rely on it to hasten recovery. Here’s what scientists Afonso et al. had to say recently, after doing a big review of a lot of available data:
❝There wasn’t sufficient statistical evidence to reject the null hypothesis that stretching and passive recovery have equivalent influence on recovery.
Data is scarce, heterogeneous, and confidence in cumulative evidence is very low. Future research should address the limitations highlighted in our review, to allow for more informed recommendations.
For now, evidence-based recommendations on whether post-exercise stretching should be applied for the purposes of recovery should be avoided, as the (insufficient) data that is available does not support related claims.❞
…and breath! What a title.
Hot and Cold
Contrast bath therapy (alternating hot and cold, which notwithstanding the name, can also be done in a shower) can help reduce muscle soreness after workout, because of how the change in temperature stimulates vasodilation and vasoconstriction, reducing inflammation while speeding up healing:
Contrast Water Therapy and Exercise Induced Muscle Damage: A Systematic Review and Meta-Analysis
If doing this in the shower isn’t practical for you, and you (like most people) have only one bathtub, then cold is the way to go for the most evidence-based benefits:
Whole-Body Cryotherapy in Athletes: From Therapy to Stimulation. An Updated Review of the Literature
Eat protein whenever, carbs after
Eating protein before a workout can boost muscle protein synthesis. Be aware that even if you’re not bodybuilding, your body will still need to do cell replacement and repair, including in any muscle tissue that got damaged* during the workout
If you don’t like eating before a workout, eating protein after is fine too:
Pre- versus post-exercise protein intake has similar effects on muscular adaptations
*Note: muscle tissue is supposed to get damaged (slightly!) during many kinds of workout.
From lactic acid (that “burn” you feel when exercising) to microtears, the body’s post-workout job is to make the muscle stronger than before, and to do that, it needs you to have found the weak spots for it.
That’s what exercise-to-exhaustion does.
Eating carbs after a workout helps replace lost muscle glycogen.
For a lot more details on optimal nutrition timing in the context of exercise (carbs, proteins, micronutrients, different kinds of exercise, etc), check out this very clear guide:
International society of sports nutrition position stand: nutrient timing
Alcohol is not the post-workout carb you want
Shocking, right? But of course, it’s very common for casual sportspeople to hit the bar for a social drink after their activity of choice.
However, consuming alcohol after exercise doesn’t merely fail to help, it actively inhibits glycogen replacement and protein synthesis:
Also, if you’re tempted to take alcohol “to relax”, please be aware that alcohol only feels relaxing because of what it does to the brain; to the rest of the body, it is anything but, and also raises blood pressure and cortisol levels.
As to what to drink instead…
Hydrate, and consider creatine and tart cherry supplementation
Hydration is a no-brainer, but when you’re dehydrated, it’s easy to forget!
Creatine is a very well-studied supplement, that helps recovery from intense exercise:
Tart cherry juice has been found to reduce muscle damage, soreness, and inflammation after exercise:
Wondering where you can get tart cherry powder? We don’t sell it (or anything else), but here’s an example product on Amazon.
And of course, actually rest
That includes good sleep, please. Otherwise…
Effects of Sleep Deprivation on Acute Skeletal Muscle Recovery after Exercise
Rest well!
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Sesame Oil vs Almond Oil – Which is Healthier?
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Our Verdict
When comparing sesame oil to almond oil, we picked the almond.
Why?
We were curious about this one! Were you, or were you confident? You see, almonds tend to blow away all the other nuts with their nutritional density, but they’re far from the oiliest of nuts, and their greatest strengths include their big dose of protein and fiber (which don’t make it into the oil), vitamins (most of which don’t make it into the oil) and minerals (which don’t make it into the oil). So, a lot will come down to the fat profile!
On which note, looking at the macros first, it’s 100% fat in both cases, but sesame oil has more saturated fat and polyunsaturated fat, while almond oil has more monounsaturated fat. Since the mono- and poly-unsaturated fats are both healthy and each oil has more of one or the other, the deciding factor here is which has the least saturated fat—and that’s the almond oil, which has close to half the saturated fat of sesame oil. As an aside, neither of them are a source of omega-3 fatty acids.
In terms of vitamins, there’s not a lot to say here, but “not a lot” is not nothing: sesame oil has nearly 2x the vitamin K, while almond oil has 28x the vitamin E*, and 2x the choline. So, another win for almond oil.
*which is worth noting, not least of all because seeds are more widely associated with vitamin E in popular culture, but it’s the almond oil that provide much more here. Not to get too distracted into looking at the values of the actual seeds and nuts, almonds themselves do have over 102x the vitamin E compared to sesame seeds.
Now, back to the oils:
In the category of minerals, there actually is nothing to say here, except you can’t get more than the barest trace of any mineral from either of these two oils. So it’s a tie on this one.
Adding up the categories makes for a clear win for almond oil!
Want to learn more?
You might like to read:
Avocado Oil vs Olive Oil – Which is Healthier?
Take care!
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Cancer is increasingly survivable – but it shouldn’t depend on your ability to ‘wrangle’ the health system
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One in three of us will develop cancer at some point in our lives. But survival rates have improved to the point that two-thirds of those diagnosed live more than five years.
This extraordinary shift over the past few decades introduces new challenges. A large and growing proportion of people diagnosed with cancer are living with it, rather than dying of it.
In our recently published research we examined the cancer experiences of 81 New Zealanders (23 Māori and 58 non-Māori).
We found survivorship not only entailed managing the disease, but also “wrangling” a complex health system.
Surviving disease or surviving the system
Our research focused on those who had lived longer than expected (four to 32 years since first diagnosis) with a life-limiting or terminal diagnosis of cancer.
Common to many survivors’ stories was the effort it took to wrangle the system or find others to advocate on their behalf, even to get a formal diagnosis and treatment.
By wrangling we refer to the practices required to traverse complex and sometimes unwelcoming systems. This is an often unnoticed but very real struggle that comes on top of managing the disease itself.
The common focus of the healthcare system is on symptoms, side effects of treatment and other biological aspects of cancer. But formal and informal care often falls by the wayside, despite being key to people’s everyday experiences.
The inequities of cancer survivorship are well known. Analyses show postcodes and socioeconomic status play a strong role in the prevalence of cancer and survival.
Less well known, but illustrated in our research, is that survival is also linked to people’s capacity to manage the entire healthcare system. That includes accessing a diagnosis or treatment, or identifying and accessing alternative treatments.
Survivorship is strongly related to material resources, social connections, and understandings of how the health system works and what is available. For instance, one participant who was contemplating travelling overseas to get surgery not available in New Zealand said:
We don’t trust the public system. So thankfully we had private health insurance […] But if we went overseas, health insurance only paid out to $30,000 and I think the surgery was going to be a couple of hundred thousand. I remember Dad saying and crying and just being like, I’ll sell my business […] we’ll all put in money. It was really amazing.
Assets of survivorship
In New Zealand, the government agency Pharmac determines which medications are subsidised. Yet many participants were advised by oncologists or others to “find ways” of taking costly, unsubsidised medicines.
This often meant finding tens of thousands of dollars with no guarantees. Some had the means, but for others it meant drawing on family savings, retirement funds or extending mortgages. This disproportionately favours those with access to assets and influences who survives.
But access to economic capital is only one advantage. People also have cultural resources – often described as cultural capital.
In one case, a participant realised a drug company was likely to apply to have a medicine approved. They asked their private oncologist to lobby on their behalf to obtain the drug through a compassionate access scheme, without having to pay for it.
Others gained community support through fundraising from clubs they belonged to. But some worried about where they would find the money, or did not want to burden their community.
I had my doctor friend and some others that wanted to do some public fundraising. But at the time I said, “Look, most of the people that will be contributing are people from my community who are poor already, so I’m not going to do that option”.
Accessing alternative therapies, almost exclusively self-funded, was another layer of inequity. Some felt forced to negotiate the black market to access substances such as marijuana to treat their cancer or alleviate the side effects of orthodox cancer treatment.
Cultural capital is not a replacement for access to assets, however. Māori survivorship was greatly assisted by accessing cultural resources, but often limited by lack of material assets.
Persistence pays
The last thing we need when faced with the possibility of cancer is to have to push for formal diagnosis and care. Yet this was a common experience.
One participant was told nothing could be found to explain their abdominal pain – only to find later they had pancreatic cancer. Another was told their concerns about breathing problems were a result of anxiety related to a prior mental health history, only to learn later their earlier breast cancer had spread to their lungs.
Persistence is another layer of wrangling and it often causes distress.
Once a diagnosis was given, for many people the public health system kicked in and delivered appropriate treatment. However, experiences were patchy and variable across New Zealand.
Issues included proximity to hospitals, varying degrees of specialisation available, and the requirement of extensive periods away from home and whānau. This reflects an ongoing unevenness and lack of fairness in the current system.
When facing a terminal or life-limiting diagnosis, the capacity to wrangle the system makes a difference. We shouldn’t have to wrangle, but facing this reality is an important first step.
We must ensure it doesn’t become a continuing form of inequity, whereby people with access to material resources and social and cultural connections can survive longer.
Kevin Dew, Professor of Sociology, Te Herenga Waka — Victoria University of Wellington; Alex Broom, Professor of Sociology & Director, Sydney Centre for Healthy Societies, University of Sydney; Chris Cunningham, Professor of Maori & Public Health, Massey University; Elizabeth Dennett, Associate Professor in Surgery, University of Otago; Kerry Chamberlain, Professor of Social and Health Psychology, Massey University, and Richard Egan, Associate Professor in Health Promotion, University of Otago
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Fatty Acids For The Eyes & Brain: The Good And The Bad
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Good For The Eyes; Good For The Brain
We’ve written before about omega-3 fatty acids, covering the basics and some lesser-known things:
What Omega-3 Fatty Acids Really Do For Us
…and while we discussed its well-established benefits against cognitive decline (which is to be expected, because omega-3 is good against inflammation, and a large part of age-related neurodegeneration is heavily related to neuroinflammation), there’s a part of the brain we didn’t talk about in that article: the eyes.
We did, however, talk in another article about supplements that benefit the eyes and [the rest of the] brain, and the important links between the two, to the point that an examination of the levels of lutein in the retina can inform clinicians about the levels of lutein in the brain as a whole, and strongly predict Alzheimer’s disease (because Alzheimer’s patients have significantly less lutein), here:
Now, let’s tie these two ideas together
In a recent (June 2024) meta-analysis of high-quality observational studies from the US and around the world, involving nearly a quarter of a million people over 40 (n=241,151), researchers found that a higher intake of omega-3 is significantly linked to a lower risk of macular degeneration.
To put it in numbers, the highest intake of omega-3s was associated with an 18% reduced risk of early stage macular degeneration.
They also looked at a breakdown of what kinds of omega-3, and found that taking a blend DHA and EPA worked best of all, although of people who only took one kind, DHA was the best “single type” option.
You can read the paper in full, here:
Association between fatty acid intake and age-related macular degeneration: a meta-analysis
A word about trans-fatty acids (TFAs)
It was another feature of the same study that, while looking at fatty acids in general, they also found that higher consumption of trans-fatty acids was associated with a higher risk of advanced age-related macular degeneration.
Specifically, the highest intake of TFAs was associated with a more than 2x increased risk.
There are two main dietary sources of trans-fatty acids:
- Processed foods that were made with TFAs; these have now been banned in a lot of places, but only quite recently, and the ban is on the processing, not the sale, so if you buy processed foods that contain ingredients that were processed before 2021 (not uncommon, given the long life of many processed foods), the chances of them having TFAs is higher.
- Most animal products. Most notably from mammals and their milk, so beef, pork, lamb, milk, cheese, and yes even yogurt. Poultry and fish technically do also contain TFAs in most cases, but the levels are much lower.
Back to the omega-3 fatty acids…
If you’re wondering where to get good quality omega-3, well, we listed some of the best dietary sources in our main omega-3 article (linked at the top of today’s).
However, if you want to supplement, here’s an example product on Amazon that’s high in DHA and EPA, following the science of what we shared today 😎
Take care!
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