Fasting Without Crashing?

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Intermittent Fasting: What’s the truth?

Before we get to facts and fictions, let’s quickly cover:

What is Intermittent Fasting?

Intermittent Fasting (IF) is an umbrella term for various kinds of time-restricted fasting, based on a schedule. Types include:

Time-restricted IF, for example:

  • 16:8—Fast for 16 hours, eat during an 8-hour window
  • 18:6–Fast for 18 hours, eat during a 6-hour window
  • 20:4—Fast for 20 hours, eat during a 4-hour window

24hr fasting, including:

  • Eat Stop Eat—basically, take a day off from eating once a week
  • Alternate Day Fasting—a more extreme version of the above; it is what it sounds like; eat one day, fast the next, repeat

Non-fast fasting, e.g:

  • 5:2—Eat normally for 5 days, have a very reduced calorie intake (⅓ of normal intake) for the other 2 days
  • Fruit Fasting—have a small amount of fruit on “fast” days, but no other food
  • The Warrior Diet—as above, but include a small amount of non-starchy vegetables

Why IF?

While IF is perhaps most commonly undertaken as a means of fat loss or fat management (i.e., keeping fat down when it is already low), others cite different reasons, such as short term cognitive performance or long-term longevity.

But… Does it work?

Here we get into the myth-busting bit!

“IF promotes weight loss”

Mix of True and False. It can! But it also doesn’t have to. If you’re a bodybuilder who downs 4,000 calories in your 4hr eating window, you’re probably not going to lose weight! For such people, this is of course “a feature, not a bug” of IF—especially as it has been found that, in an acute study, IF did not adversely impact muscle protein synthesis.

“IF promotes fat loss, without eating less”

Broadly True. IF was found to be potentially equal to, but not necessarily better than, eating less.

“IF provides metabolic benefits for general health”

Broadly True. IF (perhaps counterintuitively) decreases the risk of insulin resistance, and also has anti-inflammatory effects, benefits a healthy gut microbiome, and promotes healthy autophagy (which as we noted in a previous edition of 10almonds, is important against both aging and cancer)

However, results vary according to which protocol you’re observing…

For what it’s worth, 16:8 is perhaps the most-studied protocol. Because such studies tend to have the eating window from midday to 8pm, this means that—going against popular wisdom—part of the advice here is basically “skip breakfast”.

“Unlike caloric restriction, IF is sustainable and healthy as a long-term protocol”

Broadly True. Of course, there’s a slight loophole here in that IF is loosely defined—technically everyone fasts while they’re sleeping, at the very least!

However, for the most commonly-studied IF method (16:8), this is generally very sustainable and healthy and for most people.

On the other hand, a more extreme method such as Alternate Day Fasting, may be trickier to sustain (even if it remains healthy to do so), because it’s been found that hunger does not decrease on fasting days—ie, the body does not “get used to it”.

The American Journal of Clinical Nutrition wrote:

❝Alternate-day fasting was feasible in nonobese subjects, and fat oxidation increased. However, hunger on fasting days did not decrease, perhaps indicating the unlikelihood of continuing this diet for extended periods of time. Adding one small meal on a fasting day may make this approach to dietary restriction more acceptable.❞

American Journal of Clinical Nutrition

“IF improves mood and cognition”

Mix of True and False (plus an honest “We Don’t Know” from researchers).

Many studies have found benefits to both mood and cognition, but in the short-term, fasting can make people “hangry” (or: “experience irritability due to low blood sugar levels”, as the scientists put it), and in the long term, it can worsen symptoms of depression for those who already experience such—although some studies have found it can help alleviate depressive symptoms.

Basically this is one where researchers typically append the words “more research is needed” to their summaries.

“Anyone can do IF”

Definitely False, unless going by the absolute broadest possible interpretation of what constitutes “Intermittent Fasting” to the point of disingenuity.

For example, if you are Type 1 Diabetic, and your blood sugars are hypo, and you wait until tomorrow to correct that, you will stand a good chance of going into a coma instead. So please don’t.

(On the other hand, IF may help achieve remission of type 2 diabetes)

Lastly, IF is broadly not recommend to children and adolescents, anyone pregnant or breastfeeding, and certain underlying health conditions not mentioned above (we’re not going to try to give an exhaustive list here, but basically, if you have a chronic health condition, we recommend you check with your doctor first).

WHICH APP?

Choosing a fasting app

Thinking of giving IF a try and would like a little extra help? We’ve got you covered!

Check out: Livewire’s 7 Best Intermittent Fasting Apps of 2023

Prefer to just trust us with a recommendation?

We like BodyFast—it’s #2 on Lifewire’s list, but it has an array of pre-set plans to choose from (unlike Lifewire’s #1, Zero), and plenty of clear tracking, scheduling help, and motivational features.

Both are available on both iOS and Android:

See the BodyFast App / See the Zero App

Don’t Forget…

Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!

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Learn to Age Gracefully

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  • Remember – by Dr. Lisa Genova

    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.

    Memory is often viewed as one thing—either you have a good memory, or you don’t. At best, a lot of people have a vague idea of selective memory. But, the reality is much more complex—and much more interesting.

    Dr. Genova lays out clearly and simply the various different kinds of memory, how they work, and how they fail. Some of these kinds of memory operate on completely different principles than others, and/or in different parts of the brain. And, it’s not just “a memory for faces” or a “memory for names”, nor even “short term vs long term”. There’s working memory, explicit and implicit memory, semantic memory, episodic memory, muscle memory, and more.

    However, this is not just an interesting book—it’s also a useful one. Dr. Genova also looks at how we can guard against failing memory in later years, and how we can expand and grow the kinds of memory that are most important to us.

    The style of the book is very conversational, and not at all textbook-like. It’s certainly very accessible, and pleasant to read too.

    Bottom line: memory is a weird and wonderful thing, and this book shines a clear light on many aspects of it—including how to improve the various different kinds of memory.

    Click here to check out Remember (we recommend to do it now before you forget!

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  • Saunas: Health Benefits (& Caveats)

    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.

    The Heat Is On

    In Tuesday’s newsletter, we asked you your (health-related) opinion on saunas, and got the above-depicted, below-described, set of responses:

    • About 53% said it is “a healthful activity with many benefits”
    • About 25% said it is “best avoided; I feel like I’m dying in there”
    • About 12% said “it feels good and therefore can’t be all bad”

    So what does the science say?

    The heat of saunas carries a health risk: True or False?

    False, generally speaking, for any practical purposes. Of course, anything in life comes with a health risk, but statistically speaking, your shower at home is a lot more dangerous than a sauna (risk of slipping with no help at hand).

    It took a bit of effort to find a paper on the health risks of saunas, because all the papers on PubMed etc coming up for those keywords were initially papers with “reduces the risk of…”, i.e. ways in which the sauna is healthy.

    However, we did find one:

    ❝Contraindications to sauna bathing include unstable angina pectoris, recent myocardial infarction, and severe aortic stenosis.

    Sauna bathing is safe, however, for most people with coronary heart disease with stable angina pectoris or old myocardial infarction.

    Very few acute myocardial infarctions and sudden deaths occur in saunas, but alcohol consumption during sauna bathing increases the risk of hypotension, arrhythmia, and sudden death, and should be avoided. ❞

    ~ Dr. Matti Hannuksela & Dr. Samer Ellahham

    Source: Benefits and risks of sauna bathing

    So, very safe for most people, safe even for most people with heart disease, but there are exceptions so check with your own doctor of course.

    And drinking alcohol anywhere is bad for the health, but in a sauna it’s a truly terrible idea. As an aside, please don’t drink alcohol in the shower, either (risk of slipping with no help at hand, and this time, broken glass too).

    On the topic of it being safe for most people’s hearts, see also:

    Beneficial effects of sauna bathing for heart failure patients

    As an additional note, those who have a particular sensitivity to the heat, may (again please check with your own doctor, as your case may vary) actually benefit from moderate sauna use, to reduce the cardiovascular strain that your body experiences during heatwaves (remember, you can get out of a sauna more easily than you can get out of a heatwave, so for many people it’s a lot easier to do moderation and improve thermoregulatory responses):

    Passive heat therapy: a promising preventive measure for people at risk of adverse health outcomes during heat extremes

    Sauna usage can bring many health benefits: True or False?

    True! Again, at least for most people. As well as the above-discussed items, here’s one for mortality rates in healthy Finnish men:

    Sauna bathing and mortality risk: unraveling the interaction with systolic blood pressure in a cohort of Finnish men

    Not only that, also…

    ❝The Finnish saunas have the most consistent and robust evidence regarding health benefits and they have been shown to decrease the risk of health outcomes such as hypertension, cardiovascular disease, thromboembolism, dementia, and respiratory conditions; may improve the severity of musculoskeletal disorders, COVID-19, headache and flu, while also improving mental well-being, sleep, and longevity.

    Finnish saunas may also augment the beneficial effects of other protective lifestyle factors such as physical activity.

    The beneficial effects of passive heat therapies may be linked to their anti-inflammatory, cytoprotective and anti-oxidant properties and synergistic effects on neuroendocrine, circulatory, cardiovascular and immune function.

    Passive heat therapies, notably Finnish saunas, are emerging as potentially powerful and holistic strategies to promoting health and extending the healthspan in all populations. ❞

    ~ Dr. Jari Laukkanen & Dr. Setor Kunutsor

    Source: The multifaceted benefits of passive heat therapies for extending the healthspan: A comprehensive review with a focus on Finnish sauna

    (the repeated clarification of “Finnish sauna” is not a matter of fervent nationalism, by the way, but rather a matter of disambiguating it from Swedish sauna, which has some differences, most notably a lack of steam)

    That reminds us: in Scandinavia, it is usual to use a sauna naked, and in Finland in particular, it is a common social activity amongst friends, coworkers, etc. In the US, many people are not so comfortable with nudity, and indeed, many places that provide saunas, may require the wearing of swimwear. But…

    Just one problem: if you’re wearing swimwear because you’ve just been swimming in a pool, you now have chlorinated water soaked into your swimwear, which in the sauna, will become steam + chlorine gas. That’s not so good for your health (and is one reason, beyond tradition and simple normalization, for why swimwear is usually not permitted in Finnish saunas).

    Want to read more?

    You might like our previous main feature,

    Turning Up The Heat Against Diabetes & Alzheimer’s ← you guessed it, sauna may be beneficial against these too

    Take care!

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  • Red-dy For Anything Polyphenol Salad

    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.

    So, you’ve enjoyed your Supergreen Superfood Salad Slaw, and now you’re ready for another slice of the rainbow. Pigments in food aren’t just for decoration—they each contain unique benefits! Today’s focus is on some red foods that, combined, make a deliciously refreshing salad that’s great for the gut, heart, and brain.

    You will need

    • 1 cup crème fraîche or sour cream (if vegan, use our Plant-Based Healthy Cream Cheese recipe, and add the juice of 1 lime)
    • ½ small red cabbage, thinly sliced
    • 1 red apple, cored and finely chopped
    • 1 red onion, thinly sliced
    • 10 oz red seedless grapes, halved
    • 10 oz red pomegranate seeds
    • 1 tsp red chili flakes

    Method

    (we suggest you read everything at least once before doing anything)

    1) Combine all the red ingredients in a big bowl.

    2) Add the crème fraîche and mix gently but thoroughly.

    3) If you have time, let it sit in the fridge for 48 hours before enjoying, as its colors will intensify and its polyphenols will become more bioavailable. But if you want/need, you can serve immediately; that’s fine too.

    Enjoy!

    Want to learn more?

    For those interested in some of the science of what we have going on today:

    Take care!

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Related Posts

  • The Dopamine Myth
  • Intuitive Eating Might Not Be What You Think

    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.

    In our recent Expert Insights main features, we’ve looked at two fairly opposing schools of thought when it comes to managing what we eat.

    First we looked at:

    What Flexible Dieting Really Means

    …and the notion of doing things imperfectly for greater sustainability, and reducing the cognitive load of dieting by measuring only the things that are necessary.

    And then in opposition to that,

    What Are The “Bright Lines” Of Bright Line Eating?

    …and the notion of doing things perfectly so as to not go astray, and reducing the cognitive load of dieting by having hard-and-fast rules that one does not second-guess or reconsider later when hungry.

    Today we’re going to look at Intuitive Eating, and what it does and doesn’t mean.

    Intuitive Eating does mean paying attention to hunger signals (each way)

    Intuitive Eating means listening to one’s body, and responding to hunger signals, whether those signals are saying “time to eat” or “time to stop”.

    A common recommendation is to “check in” with one’s body several times per meal, reflecting on such questions as:

    • Do I have hunger pangs? Would I seek food now if I weren’t already at the table?
    • If I hadn’t made more food than I’ve already eaten so far, would that have been enough, or would I have to look for something else to eat?
    • Am I craving any of the foods that are still before me? Which one(s)?
    • How much “room” do I feel I still have, really? Am I still in the comfort zone, and/or am I about to pass into having overeaten?
    • Am I eating for pleasure only at this point? (This is not inherently bad, by the way—it’s ok to have a little more just for pleasure! But it is good to note that this is the reason we’re eating, and take it as a cue to slow down and remember to eat mindfully, and enjoy every bite)
    • Have I, in fact, passed the point of pleasure, and I’m just eating because it’s in front of me, or so as to “not be wasteful”?

    See also: Interoception: Improving Our Awareness Of Body Cues

    And for that matter: Mindful Eating: How To Get More Out Of What’s On Your Plate

    Intuitive Eating is not “80:20”

    When it comes to food, the 80:20 rule is the idea of having 80% of one’s diet healthy, and the other 20% “free”, not necessarily unhealthy, but certainly not moderated either.

    Do you know what else the 80:20 food rule is?

    A food rule.

    Intuitive Eating doesn’t do those.

    The problem with food rules is that they can get us into the sorts of problems described in the studies showing how flexible dieting generally works better than rigid dieting.

    Suddenly, what should have been our free-eating 20% becomes “wait, is this still 20%, or have I now eaten so much compared to the healthy food, that I’m at 110% for my overall food consumption today?”

    Then one gets into “Well, I’ve already failed to do 80:20 today, so I’ll try again tomorrow [and binge meanwhile, since today is already written off]”

    See also: Eating Disorders: More Varied (And Prevalent) Than People Think

    It’s not “eat anything, anytime”, either

    Intuitive Eating is about listening to your body, and your brain is also part of your body.

    • If your body is saying “give me sugar”, your brain might add the information “fruit is healthier than candy”.
    • If your body is saying “give me fat”, your brain might add the information “nuts are healthier than fried food”
    • If your body is saying “give me salt”, your brain might add the information “kimchi is healthier than potato chips”

    That doesn’t mean you have to swear off candy, fried food, or potato chips.

    But it does mean that you might try satisfying your craving with the healthier option first, giving yourself permission to have the less healthy option afterwards if you still want it (you probably won’t).

    See also:

    I want to eat healthily. So why do I crave sugar, salt and carbs?

    Want to know more about Intuitive Eating?

    You might like this book that we reviewed previously:

    Intuitive Eating – by Evelyn Tribole and Elyse Resch

    Enjoy!

    Don’t Forget…

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    Learn to Age Gracefully

    Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:

  • Yoga Therapy for Arthritis – by Dr. Steffany Moonaz & Erin Byron

    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.

    Two quick notes to start with:

    • One of the problems with arthritis and exercise is that arthritis can often impede exercise.
    • Another of the problems with arthritis and exercise is that some kinds of exercise can exacerbate arthritis.

    This book deals with both of those issues, by providing yoga specifically tailored to living with arthritis. Indeed, the first-listed author’s PhD in public health was the result of 8 years of study developing an evidence-based yoga program for people with arthritis, including osteoarthritis and rheumatoid arthritis.

    The authors take the view that arthritis is a whole-person disease (i.e. it affects all parts of you), and so addressing it requires a whole-person approach, which is what this book delivers.

    As such, this is not just a book of asana (yoga postures). It does provide that, of course (as well as breathing exercises), but also its 328 pages additionally cover a lot of conscious work from the inside out, including attention to the brain, energy levels, pain, and so forth, and that the practice of yoga should not merely directly improve the joints via gentle physical exercise, but also should help to heal the whole person, including reducing stress levels, reducing physical tension, and with those two things, reducing inflammation also—and also, due to both that and the asana side of practice, better-functioning organs, which is always a bonus.

    The style is interesting, as it refers to both science (8 pages of hard-science bibliography) and yogic principles (enough esoterica to put off, say, James Randi or Penn & Teller). This reviewer is very comfortable with both, and so if you, dear reader, are comfortable with both too, then you will surely enjoy this book.

    Bottom line: if you or a loved one has arthritis, you’ll wish you got this book sooner.

    Click here to check out Yoga Therapy For Arthritis, and live better!

    Don’t Forget…

    Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!

    Learn to Age Gracefully

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  • Cottage Cheese vs Ricotta – Which is Healthier?

    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.

    Our Verdict

    When comparing cottage cheese to ricotta, we picked the ricotta.

    Why?

    Cottage cheese is a famous health food, mostly for being a low-fat, low-carb, source of protein. And yet, ricotta beats it in most respects.

    Looking at the macros first, cottage cheese has more carbs, while ricotta has more protein and fat. The fat profile is pretty much the same, and in both cases it’s two thirds saturated fat, which isn’t good in either case, but cottage cheese has less overall fat which means less saturated fat in total even if the percentage is the same. Because the difference in carbs and protein is not large, while ricotta has considerably more fat, we’ll call this category a win for cottage cheese.

    In terms of vitamins, cottage cheese has more of vitamins B1, B5, and B12, while ricotta has more of vitamins A, B2, B3, B9, D, E, and K, so this one’s a win for ricotta.

    In the category of minerals, cottage cheese has slightly more copper, while ricotta has much more calcium, iron, magnesium, manganese, potassium, selenium, and zinc. In particular, 2.5x more calcium, and 5x more iron! An easy and clear win for ricotta here.

    Taking everything into account: yes, cottage cheese has less fat (and thus, in total, less saturated fat, although the percentage is the same), but that doesn’t make up for ricotta winning in pretty much every other respect. Still, enjoy either or both (in moderation!) if you be so inclined.

    Want to learn more?

    You might like to read:

    Is Dairy Scary?

    Take care!

    Don’t Forget…

    Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!

    Learn to Age Gracefully

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