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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The Truth About Handwashing
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Washing Our Hands Of It
In Tuesdays’s newsletter, we asked you how often you wash your hands, and got the above-depicted, below-described, set of self-reported answers:
- About 54% said “More times per day than [the other options]”
- About 38% said “Whenever using the bathroom or kitchen
- About 5% said “Once or twice per day”
- Two (2) said “Only when visibly dirty”
- Two (2) said “I prefer to just use sanitizer gel”
What does the science have to say about this?
People lie about their handwashing habits: True or False?
True and False (since some people lie and some don’t), but there’s science to this too. Here’s a great study from 2021 that used various levels of confidentiality in questioning (i.e., there were ways of asking that made it either obvious or impossible to know who answered how), and found…
❝We analysed data of 1434 participants. In the direct questioning group 94.5% of the participants claimed to practice proper hand hygiene; in the indirect questioning group a significantly lower estimate of only 78.1% was observed.❞
Note: the abstract alone doesn’t make it clear how the anonymization worked (it is explained later in the paper), and it was noted as a limitation of the study that the participants may not have understood how it works well enough to have confidence in it, meaning that the 78.1% is probably also inflated, just not as much as the 94.5% in the direct questioning group.
Here’s a pop-science article that cites a collection of studies, finding such things as for example…
❝With the use of wireless devices to record how many people entered the restroom and used the pumps of the soap dispensers, researchers were able to collect data on almost 200,000 restroom trips over a three-month period.
The found that only 31% of men and 65% of women washed their hands with soap.❞
Source: Study: Men Wash Their Hands Much Less Often Than Women (And People Lie About Washing Their Hands)
Sanitizer gel does the job of washing one’s hands with soap: True or False?
False, though it’s still not a bad option for when soap and water aren’t available or practical. Here’s an educational article about the science of why this is so:
UCI Health | Soap vs. Hand Sanitizer
There’s also some consideration of lab results vs real-world results, because while in principle the alcohol gel is very good at killing most bacteria / inactivating most viruses, it can take up to 4 minutes of alcohol gel contact to do so, as in this study with flu viruses:
In contrast, 20 seconds of handwashing with soap will generally do the job.
Antibacterial soap is better than other soap: True or False?
False, because the main way that soap protects us is not in its antibacterial properties (although it does also destroy the surface membrane of some bacteria and for that matter viruses too, killing/inactivating them, respectively), but rather in how it causes pathogens to simply slide off during washing.
Here’s a study that found that handwashing with soap reduced disease incidence by 50–53%, and…
❝Incidence of disease did not differ significantly between households given plain soap compared with those given antibacterial soap.❞
Read more: Effect of handwashing on child health: a randomised controlled trial
Want to wash your hands more than you do?
There have been many studies into motivating people to wash their hands more (often with education and/or disgust-based shaming), but an effective method you can use for yourself at home is to simply buy more luxurious hand soap, and generally do what you can to make handwashing a more pleasant experience (taking a moment to let the water run warm is another good thing to do if that’s more comfortable for you).
Take care!
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‘Naked carbs’ and ‘net carbs’ – what are they and should you count them?
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According to social media, carbs come in various guises: naked carbs, net carbs, complex carbs and more.
You might be wondering what these terms mean or if all carbs are really the same. If you are into “carb counting” or “cutting carbs”, it’s important to make informed decisions about what you eat.
What are carbs?
Carbohydrates, or “carbs” for short, are one of the main sources of energy we need for brain function, muscle movement, digestion and pretty much everything our bodies do.
There are two classifications of carbs, simple and complex. Simple carbs have one or two sugar molecules, while complex carbs are three or more sugar molecules joined together. For example, table sugar is a simple carb, but starch in potatoes is a complex carb.
All carbs need to be broken down into individual molecules by our digestive enzymes to be absorbed. Digestion of complex carbs is a much slower process than simple carbs, leading to a more gradual blood sugar increase.
Fibre is also considered a complex carb, but it has a structure our body is not capable of digesting. This means we don’t absorb it, but it helps with the movement of our stool and prevents constipation. Our good gut bacteria also love fibre as they can digest it and use it for energy – important for a healthy gut.
What about ‘naked carbs’?
“Naked carbs” is a popular term usually used to refer to foods that are mostly simple carbs, without fibre or accompanying protein or fat. White bread, sugary drinks, jams, sweets, white rice, white flour, crackers and fruit juice are examples of these foods. Ultra-processed foods, where the grains are stripped of their outer layers (including fibre and most nutrients) leaving “refined carbs”, also fall into this category.
One of the problems with naked carbs or refined carbs is they digest and absorb quickly, causing an immediate rise in blood sugar. This is followed by a rapid spike in insulin (a hormone that signals cells to remove sugar from blood) and then a drop in blood sugar. This can lead to hunger and cravings – a vicious cycle that only gets worse with eating more of the same foods.
Naked carbs can make blood sugars spike then crash.
Pexels/Alexander GreyWhat about ‘net carbs’?
This is another popular term tossed around in dieting discussions. Net carbs refer to the part of the carb food that we actually absorb.
Again, fibre is not easily digestible. And some carb-rich foods contain sugar alcohols, such as sweeteners (like xylitol and sorbitol) that have limited absorption and little to no effect on blood sugar. Deducting the value of fibre and sugar alcohols from the total carbohydrate content of a food gives what’s considered its net carb value.
For example, canned pear in juice has around 12.3g of “total carbohydrates” per 100g, including 1.7g carb + 1.7g fibre + 1.9g sugar alcohol. So its net carb is 12.3g – 1.7g – 1.9g = 8.7g. This means 8.7g of the 12.3g total carbs impacts blood sugar.
The nutrition labels on packaged foods in Australia and New Zealand usually list fibre separately to carbohydrates, so the net carbs have already been calculated. This is not the case in other countries, where “total carbohydrates” are listed.
Does it matter though?
Whether or not you should care about net or naked carbs depends on your dietary preferences, health goals, food accessibility and overall nutritional needs. Generally speaking, we should try to limit our consumption of simple and refined carbs.
The latest World Health Organization guidelines recommend our carbohydrate intake should ideally come primarily from whole grains, vegetables, fruits and pulses, which are rich in complex carbs and fibre. This can have significant health benefits (to regulate hunger, improve cholesterol or help with weight management) and reduce the risk of conditions such as heart disease, obesity and colon cancer.
In moderation, naked carbs aren’t necessarily bad. But pairing them with fats, protein or fibre can slow down the digestion and absorption of sugar. This can help to stabilise blood sugar levels, prevent spikes and crashes and support personal weight management goals. If you’re managing diabetes or insulin resistance, paying attention to the composition of your meals, and the quality of your carbohydrate sources is essential.
A ketogenic (high fat, low carb) diet typically restricts carb intake to between 20 and 50g each day. But this carb amount refers to net carbs – so it is possible to eat more carbs from high-fibre sources.
Choose complex carbohydrates with lots of fibre.
ShutterstockSome tips to try
Some simple strategies can help you get the most out of your carb intake:
reduce your intake of naked carbs and foods high in sugar and white flour, such as white bread, table sugar, honey, lollies, maple syrup, jam, and fruit juice
opt for protein- and fibre-rich carbs. These include oats, sweet potatoes, nuts, avocados, beans, whole grains and broccoli
if you are eating naked carbs, dress them up with some protein, fat and fibre. For example, top white bread with a nut butter rather than jam
if you are trying to reduce the carb content in your diet, be wary of any symptoms of low blood glucose, including headaches, nausea, and dizziness
- working with a health-care professional such as an accredited practising dietitian or your GP can help develop an individualised diet plan that meets your specific needs and goals.
Correction: this article has been updated to indicate how carbohydrates are listed on food nutrition labels in Australia and New Zealand.
Saman Khalesi, Senior Lecturer and Discipline Lead in Nutrition, School of Health, Medical and Applied Sciences, CQUniversity Australia; Anna Balzer, Lecturer, Medical Science School of Health, Medical and Applied Sciences, CQUniversity Australia; Charlotte Gupta, Postdoctoral research fellow, CQUniversity Australia; Chris Irwin, Senior Lecturer in Nutrition and Dietetics, School of Health Sciences & Social Work, Griffith University, and Grace Vincent, Senior Lecturer, Appleton Institute, CQUniversity Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Rushing Woman’s Syndrome – by Dr. Libby Weaver
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It’s well-known that very many women suffer from “the triple burden” of professional work, housework, and childcare. And it’s not even necessarily that we resent any of those things or feel like they’re a burden; we (hopefully) love our professions, homes, children. But, here’s the thing: no amount of love will add extra hours to the day!
On the psychological level, a lot is about making more conscious decisions and fewer automatic reactions. For example, everyone wants everything from us right now, if not by yesterday, but when do they need it? And, is it even our responsibility? Not everything is, and many of us take on more than we should in our effort to be “enough”.
On the physical level, she covers hormones, including the menstrual/menopausal and the metabolic, as well as liver health, digestive issues, and sleep.
The style is direct and friendly, making frequent references to science but not getting deep into it.
It’s worth noting that while she acknowledges other demographics exist, she’s writing mainly for an audience of otherwise healthy straight white women with children and at least moderate financial resources, so if you fall outside of those things, there may be things that society will penalize you for and expect more from you in return for less, so that is a limitation of the book.
Bottom line: if the above describes you, you will probably get value out of this book.
Click here to check out Rushing Woman’s Syndrome, and take care of yourself too!
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Serotonin vs Dopamine (Know The Differences)
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Of the various neurotransmitters that people confuse with each other, serotonin and dopamine are the two highest on the list (with oxytocin coming third as people often attribute its effects to serotonin). But, for all they are both “happiness molecules”, serotonin and dopamine are quite different, and are even opposites in some ways:
More than just happiness
Let’s break it down:
Similarities:
- Both are neurotransmitters, neuromodulators, and monoamines.
- Both impact cognition, mood, energy, behavior, memory, and learning.
- Both influence social behavior, though in different ways.
Differences (settle in; there are many):
- Chemical structure:
- Dopamine: catecholamine (derived from phenylalanine and tyrosine)
- Serotonin: indoleamine (derived from tryptophan)
- Derivatives:
- Dopamine → noradrenaline and adrenaline (stress and alertness)
- Serotonin → melatonin (sleep and circadian rhythm)
- Effects on mental state:
- Dopamine: drives action, motivation, and impulsivity.
- Serotonin: promotes calmness, behavioral inhibition, and cooperation.
- Role in memory and learning:
- Dopamine: key in attention and working memory
- Serotonin: crucial for hippocampus activation and long-term memory
Symptoms of imbalance:
- Low dopamine:
- Loss of motivation, focus, emotion, and activity
- Linked to Parkinson’s disease and ADHD
- Low serotonin:
- Sadness, irritability, poor sleep, and digestive issues
- Linked to PTSD, anxiety, and OCD
- High dopamine:
- Excessive drive, impulsivity, addictions, psychosis
- High serotonin:
- Nervousness, nausea, and in extreme cases, serotonin syndrome (which can be fatal)
Brain networks:
- Dopamine: four pathways controlling movement, attention, executive function, and hormones.
- Serotonin: widely distributed across the cortex, partially overlapping with dopamine systems.
Speed of production:
- Dopamine: can spike and deplete quickly; fatigues faster with overuse.
- Serotonin: more stable, releasing steadily over longer periods.
Illustrative examples:
- Coffee boosts dopamine but loses its effect with repeated use.
- Sunlight helps maintain serotonin levels over time.
If you remember nothing else, remember this:
- Dopamine: action, motivation, and alertness.
- Serotonin: contentment, happiness, and calmness.
For more on all of the above, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
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What Are “Adaptogens” Anyway? (And Other Questions Answered)
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It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
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 tried to use your calculator for heart health, and was unable to enter in my height or weight. Is there another way to calculate? Why will that field not populate?❞
(this is in reference to yesterday’s main feature “How Are You, Really? And How Old Is Your Heart?“)
How strange! We tested it in several desktop browsers and several mobile browsers, and were unable to find any version that didn’t work. That includes switching between metric and imperial units, per preference; both appear to work fine. Do be aware that it’ll only take numerical imput, though.
Did anyone else have this problem? Let us know! (You can reply to this email, or use the handy feedback widget at the bototm)
❝I may have missed it, but how much black pepper provides benefits?❞
So, for any new subscribers joining us today, this is about two recent main features:
As for a daily dosage of black pepper, it varies depending on the benefit you’re looking for, but:
- 5–20mg of piperine is the dosage range used in most scientific studies we looked at
- 10mg is a very common dosage found in many popular supplements
- That’s the mass of piperine though, so if taking it as actual black pepper rather than as an extract, ½ teaspoon is considered sufficient to enjoy benefits.
❝I loved the health benefits of pepper. I do not like pepper. Where can I get it as a supplement?❞
You can simply buy whole black peppercorns and take a few with water as though they were tablets. Your stomach acid will do the rest. Black pepper is also good for digestion, so taking it with a meal is best.
You can buy piperine (black pepper extract) by itself as a supplement in powder form, but if you don’t like black pepper, you will probably not like this powder either. We couldn’t find it readily in capsule form.
You can buy piperine (black pepper extract) as an adjunct to other supplements, with perhaps the most common/popular being turmeric capsules that also contain 10mg (or more) piperine per capsule. Shop around if you like, but here’s one that has 15mg piperine* per capsule, for example.
*They call it “Bioperine®” but that is literally just piperine. Same goes if you see “Absorbagen™”, it’s still just piperine.
❝What do you mean when you say that something is adaptogenic?❞
Simple version: it means it helps the body adapt to stress, by adjusting the body’s natural responses. Thus, adaptogenic supplements can be contrasted with tranquilizing drugs that mask stress by brute force, for example.
Technical version: adaptogenic activity refers to improving physiological stress resilience, such as by moderating and modulating hypothalamic–pituitary–adrenal axis signaling, and/or by regulating levels of endogenic compounds involved in the cellular stress response.
Read more (technical version):
Read more (simple version):
European Medicines Agency’s Reflection Paper On The Adaptogenic Concept
Enjoy!
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Take Care Of Your “Unwanted” Parts Too!
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Meet The Family…
If you’ve heard talk of “healing your inner child” or similar ideas, then today’s featured type of therapy takes that to several extra levels, in a way that helps many people.
It’s called Internal Family Systems therapy, often “IFS” for short.
Here’s a quick overview:
Psychology Today | Internal Family Systems Therapy
Note: if you are delusional, paranoid, schizophrenic, or have some other related disorder*, then IFS would probably be a bad idea for you as it could worsen your symptoms, and/or play into them badly.
*but bipolar disorder, in its various forms, is not usually a problem for IFS. Do check with your own relevant healthcare provider(s), of course, to be sure.
What is IFS?
The main premise of IFS is that your “self” can be modelled as a system, and its constituent parts can be examined, questioned, given what they need, and integrated into a healthy whole.
For example…
- Exile is the name given to parts that could be, for example, the “inner child” referenced in a lot of pop-psychology, but it could also be some other ignored and pushed-down part of oneself, often from some kind of trauma. The defining characteristic of an exile is that it’s a part of ourself that we don’t consciously allow ourselves to see as a current part of ourself.
- Protector is the name given to a part of us that looks to keep us safe, and can do this in an adaptive (healthy) or maladaptive (unhealthy) way, for example:
- Firefighter is the name given to a part of us that will do whatever is necessary in the moment to deal with an exile that is otherwise coming to the surface—sometimes with drastic actions/reactions that may not be great for us.
- Manager is the name given to a part of us that has a more nurturing protective role, keeping us from harm in what’s often a more prophylactic manner.
To give a simple illustration…
A person was criticized a lot as a child, told she was useless, and treated as a disappointment. Consequently, as an adult she now has an exile “the useless child”, something she strives to leave well behind in her past, because it was a painful experience for her. However, sometimes when someone questions and/or advises her, she will get defensive as her firefighter “the hero” will vigorously speak up for her competence, like nobody did when she was a child. This vigor, however, manifests as rude abrasiveness and overcompensation. Finally, she has a manager, “the advocate”, who will do the same job, but in a more quietly confident fashion.
This person’s therapy will look at transferring the protector job from the firefighter to the manager, which will involve examining, questioning, and addressing all three parts.
The above example is fictional and created for simplicity and clarity; here’s a real-world case study if you’d like a more in-depth overview of how it can work:
How it all fits together in practice
IFS looks to make sure all the parts’ needs are met, even the “bad” ones, because they all have their functions.
Good IFS therapy, however, can make sure a part is heard, and then reassure that part in a way that effectively allows that part to “retire”, safe and secure in the knowledge that it has done what it needed to, and/or the job is being done by another part now.
That can involve, for example, thanking the firefighter for looking after our exile for all these years, but that our exile is safe and in good hands now, so it can put that fire-axe away.
See also: On Being Reactive vs Being Responsive
Questions you might ask yourself
While IFS therapy is best given by a skilled practitioner, we can take some of the ideas of it for self-therapy too. For example…
- What is a secret about yourself that you will take to the grave? And now, why did that part of you (now an exile) come to exist?
- What does that exile need, that it didn’t get? What parts of us try to give it that nowadays?
- What could we do, with all that information in mind, to assign the “protection” job to the part of us best-suited to healthy integration?
Want to know more?
We’ve only had the space of a small article to give a brief introduction to Family Systems therapy, so check out the “resources” tab at:
IFS Institute | What Is Internal Family Systems Therapy?
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