What Size Breakfast Is Best, By Science?
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“Breakfast is the most important meal of the day”, the popular wisdom goes. But, what should it consist of, and how much should we be eating for breakfast?
It has been previously established that it is good if breakfast is the largest meal of the day:
…with meals getting progressively smaller thereafter.
Of course, very many people do the inverse: small (or skipped) breakfast, moderate lunch, larger dinner. This, however, is probably more a result of when eating fits around the modern industrialized workday (and thus gets normalized), rather than actual health considerations.
So, what’s the latest science?
A plucky band of researchers led by Dr. Karla-Alejandra Pérez-Vega investigated the importance of breakfast in the context of heart health. This research was done as part of a larger study into the effects of the Mediterranean Diet on cardiovascular health, so if anyone wants a quick recap before we carry on, then:
The Mediterranean Diet: What Is It Good For? ← the answer, by the way, is “pretty much everything”
…and there are also different versions that each use the Mediterranean Diet as the core, while focussing extra on a different area of health, including one to make it extra heart-healthy:
Four Ways To Upgrade The Mediterranean ← most anti-inflammatory / gut-healthiest / heart-healthiest / brain-healthiest
What they found
In their sample population (n=383) of Spanish adults aged 55–75 with pre-diagnosed metabolic syndrome who, as part of the intervention of this 36-month interventional study, had now for the past 36 months been on a Mediterranean diet but without specific guidance on portion sizes:
- Participants with insufficient breakfast energy intake had the highest adiposity (which is a measure of body fat expressed as a percentage of total mass)
- Participants with low or high (but not moderate) breakfast energy intake had the larger BMI and waist circumference over time
- Participants with low or high (but not moderate) breakfast energy intake had higher triglyceride and lower HDL (good) cholesterol levels
- Participants who consumed 20–30% of their daily calories at breakfast enjoyed the greatest improvements in lipid profiles, with lower triglycerides and higher HDL (good) cholesterol levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had higher blood pressure levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had higher blood sugar levels
- Participants with lower breakfast quality (lower adherence to Mediterranean Diet) had lower estimated glomerular filtration rate (which is an indicator of kidney function)
- Participants with higher breakfast quality (higher adherence to Mediterranean Diet) had lower waist circumference, higher HDL cholesterol, and better kidney function
You can see the paper itself here in the Journal of Nutrition, Health, and Aging:
What this means
According to this research, the heart-healthiest breakfast is:
- not skipped
- Mediterranean Diet adherent
- within the range of of 20–30% of the total calories for the day
Want to make it even better?
Consider:
Before You Eat Breakfast: 3 Surprising Facts About Intermittent Fasting
Enjoy!
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Cardiac Failure Explained – by Dr. Warrick Bishop
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The cover of this book makes it look like it’ll be a flashy semi-celebrity doctor keen to sell his personalized protocol, along with eleventy-three other books, but actually, what’s inside this one is very different:
We (hopefully) all know the basics of heart health, but this book takes it a lot further. Starting with the basics, then the things that it’s easy to feel like you should know but actually most people don’t, then into much more depth.
The format is much more like a university textbook than most pop-science books, and everything about the way it’s written is geared for maximum learning. The one thing it does keep in common with pop-science books as a genre is heavy use of anecdotes to illustrate points—but he’s just as likely to use tables, diagrams, callout boxes, emboldening of key points, recap sections, and so forth. And for the most part, this book is very information-dense.
Dr. Bishop also doesn’t just stick to what’s average, and talks a lot about aberrations from the norm, what they mean and what they do and yes, what to do about them.
On the one hand, it’s more information dense than the average reader can reasonably expect to need… On the other hand, isn’t it great to finish reading a book feeling like you just did a semester at medical school? No longer will you be baffled by what is going on in your (or perhaps a loved one’s) cardiac health.
Bottom line: if you’d like to know cardiac health inside out, this book is an excellent place to start.
Click here to check out Cardiac Failure Explained, and get to the heart of things!
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How To Grow New Brain Cells (At Any Age)
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How To Grow New Brain Cells (At Any Age)
It was long believed that brain growth could not occur later in life, due to expending our innate stock of pluripotent stem cells. However, this was mostly based on rodent studies.
Rodent studies are often used for brain research, because it’s difficult to find human volunteers willing to have their brains sliced thinly (so that the cells can be viewed under a microscope) at the end of the study.
However, neurobiologist Dr. Maura Boldrini led a team that did a lot of research by means of autopsies on the hippocampi of (previously) healthy individuals ranging in age from 14 to 79.
What she found is that while indeed the younger subjects did predictably have more young brain cells (neural progenitors and immature neurons), even the oldest subject, at the age of 79, had been producing new brain cells up until death.
Read her landmark study: Human Hippocampal Neurogenesis Persists throughout Aging
There was briefly a flurry of news articles about a study by Dr. Shawn Sorrels that refuted this, however, it later came to light that Dr. Sorrels had accidentally destroyed his own evidence during the cell-fixing process—these things happen; it’s just unfortunate the mistake was not picked up until after publication.
A later study by a Dr. Elena Moreno-Jiménez fixed this flaw by using a shorter fixation time for the cell samples they wanted to look at, and found that there were tens of thousands of newly-made brain cells in samples from adults ranging from 43 to 87.
Now, there was still a difference: the samples from the youngest adult had 30% more newly-made braincells than the 87-year-old, but given that previous science thought brain cell generation stopped in childhood, the fact that an 87-year-old was generating new brain cells 30% less quickly than a 43-year-old is hardly much of a criticism!
As an aside: samples from patients with Alzheimer’s also had a 30% reduction in new braincell generation, compared to samples from patients of the same age without Alzheimer’s. But again… Even patients with Alzheimer’s were still growing some new brain cells.
Read it for yourself: Adult hippocampal neurogenesis is abundant in neurologically healthy subjects and drops sharply in patients with Alzheimer’s disease
Practical advice based on this information
Since we can do neurogenesis at any age, but the rate does drop with age (and drops sharply in the case of Alzheimer’s disease), we need to:
Feed your brain. The brain is the most calorie-consuming organ we have, by far, and it’s also made mostly of fat* and water. So, get plenty of healthy fats, and get plenty of water.
*Fun fact: while depictions in fiction (and/or chemically preserved brains) may lead many to believe the brain has a rubbery consistency, the untreated brain being made of mostly fat and water gives it more of a blancmange-like consistency in reality. That thing is delicate and spatters easily. There’s a reason it’s kept cushioned inside the strongest structure of our body, far more protected than anything in our torso.
Exercise. Specifically, exercise that gets your blood pumping. This (as our earlier-featured video today referenced) is one of the biggest things we can do to boost Brain-Derived Neurotrophic Factor, or BDNF.
Here be science: Brain-Derived Neurotrophic Factor, Depression, and Physical Activity: Making the Neuroplastic Connection
However, that’s not the only way to increase BDNF; another is to enjoy a diet rich in polyphenols. These can be found in, for example, berries, tea, coffee, and chocolate. Technically those last two are also botanically berries, but given how we usually consume them, and given how rich they are in polyphenols, they merit a special mention.
See for example: Effects of nutritional interventions on BDNF concentrations in humans: a systematic review
Some supplements can help neuron (re)growth too, so if you haven’t already, you might want to check out our previous main feature on lion’s mane mushroom, a supplement which does exactly that.
For those who like videos, you may also enjoy this TED talk by neuroscientist Dr. Sandrine Thuret:
Prefer text? Click here to read the transcript
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Common Hospital Blood Pressure Mistake (Don’t Let This Happen To You Or A Loved One)
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There’s a major issue in healthcare, Dr. Suneel Dhand tells us, pertaining to the overtreatment of hypertension in hospitals. Here’s how to watch out for it and know when to question it:
Under pressure
When patients, particularly from older generations, are admitted to the hospital, their blood pressure often fluctuates due to illness, dehydration, and other factors. Despite this, they are often continued on their usual blood pressure medications, which can lead to dangerously low blood pressure.
Why does this happen? The problem arises from rigid protocols that dictate stopping blood pressure medication only if systolic pressure is below a certain threshold, often 100. However, Dr. Dhand argues that 100 is already low*, and administering medication when blood pressure is close to this can cause it to drop dangerously lower
*10almonds note: low for an adult, anyway, and especially for an older adult. To be clear: it’s not a bad thing! That is the average systolic blood pressure of a healthy teenager and it’s usually the opposite of a problem if we have that when older (indeed, this very healthy writer’s blood pressure averages 100/70, and suffice it to say, it’s been a long time since I was a teenager). But it does mean that we definitely don’t want to take medications to artificially lower it from there.
Low blood pressure from overtreatment can lead to severe consequences, requiring emergency interventions to stabilize the patient.
Dr. Dhand’s advice for patients and families is:
- Ensure medication accuracy: make sure the medical team knows the correct blood pressure medications and dosages for you or your loved one.
- Monitor vital signs: actively check blood pressure readings, especially if they are in the low 100s or even 110s, and discuss any medication concerns with the medical team.
- Watch for symptoms of low blood pressure: be alert for symptoms like dizziness or weakness, which could indicate dangerously low blood pressure.
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
The Insider’s Guide To Making Hospital As Comfortable As Possible
Take care!
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Yes, blue light from your phone can harm your skin. A dermatologist explains
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Social media is full of claims that everyday habits can harm your skin. It’s also full of recommendations or advertisements for products that can protect you.
Now social media has blue light from our devices in its sights.
So can scrolling on our phones really damage your skin? And will applying creams or lotions help?
Here’s what the evidence says and what we should really be focusing on.
Max kegfire/Shutterstock Remind me, what actually is blue light?
Blue light is part of the visible light spectrum. Sunlight is the strongest source. But our electronic devices – such as our phones, laptops and TVs – also emit it, albeit at levels 100-1,000 times lower.
Seeing as we spend so much time using these devices, there has been some concern about the impact of blue light on our health, including on our eyes and sleep.
Now, we’re learning more about the impact of blue light on our skin.
How does blue light affect the skin?
The evidence for blue light’s impact on skin is still emerging. But there are some interesting findings.
1. Blue light can increase pigmentation
Studies suggest exposure to blue light can stimulate production of melanin, the natural skin pigment that gives skin its colour.
So too much blue light can potentially worsen hyperpigmentation – overproduction of melanin leading to dark spots on the skin – especially in people with darker skin.
Blue light can worsen dark spots on the skin caused by overproduction of melanin. DUANGJAN J/Shutterstock 2. Blue light can give you wrinkles
Some research suggests blue light might damage collagen, a protein essential for skin structure, potentially accelerating the formation of wrinkles.
A laboratory study suggests this can happen if you hold your device one centimetre from your skin for as little as an hour.
However, for most people, if you hold your device more than 10cm away from your skin, that would reduce your exposure 100-fold. So this is much less likely to be significant.
3. Blue light can disrupt your sleep, affecting your skin
If the skin around your eyes looks dull or puffy, it’s easy to blame this directly on blue light. But as we know blue light affects sleep, what you’re probably seeing are some of the visible signs of sleep deprivation.
We know blue light is particularly good at suppressing production of melatonin. This natural hormone normally signals to our bodies when it’s time for sleep and helps regulate our sleep-wake cycle.
By suppressing melatonin, blue light exposure before bed disrupts this natural process, making it harder to fall asleep and potentially reducing the quality of your sleep.
The stimulating nature of screen content further disrupts sleep. Social media feeds, news articles, video games, or even work emails can keep our brains active and alert, hindering the transition into a sleep state.
Long-term sleep problems can also worsen existing skin conditions, such as acne, eczema and rosacea.
Sleep deprivation can elevate cortisol levels, a stress hormone that breaks down collagen, the protein responsible for skin’s firmness. Lack of sleep can also weaken the skin’s natural barrier, making it more susceptible to environmental damage and dryness.
Can skincare protect me?
The beauty industry has capitalised on concerns about blue light and offers a range of protective products such as mists, serums and lip glosses.
From a practical perspective, probably only those with the more troublesome hyperpigmentation known as melasma need to be concerned about blue light from devices.
This condition requires the skin to be well protected from all visible light at all times. The only products that are totally effective are those that block all light, namely mineral-based suncreens or some cosmetics. If you can’t see the skin through them they are going to be effective.
But there is a lack of rigorous testing for non-opaque products outside laboratories. This makes it difficult to assess if they work and if it’s worth adding them to your skincare routine.
What can I do to minimise blue light then?
Here are some simple steps you can take to minimise your exposure to blue light, especially at night when it can disrupt your sleep:
- use the “night mode” setting on your device or use a blue-light filter app to reduce your exposure to blue light in the evening
- minimise screen time before bed and create a relaxing bedtime routine to avoid the types of sleep disturbances that can affect the health of your skin
- hold your phone or device away from your skin to minimise exposure to blue light
- use sunscreen. Mineral and physical sunscreens containing titanium dioxide and iron oxides offer broad protection, including from blue light.
In a nutshell
Blue light exposure has been linked with some skin concerns, particularly pigmentation for people with darker skin. However, research is ongoing.
While skincare to protect against blue light shows promise, more testing is needed to determine if it works.
For now, prioritise good sun protection with a broad-spectrum sunscreen, which not only protects against UV, but also light.
Michael Freeman, Associate Professor of Dermatology, Bond University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Inflammation Spectrum – by Dr. Will Cole
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We’ve previously reviewed Dr. Cole’s other book “Gut Feelings”, and now he’s back, this time to tackle inflammation.
The focus here is on understanding what things trigger inflammation in your body—personally yours, not someone else’s—by something close to the usual elimination process yes, but he offers a way of sliding into it gently instead of simply quitting all the things and gradually adding everything back in.
The next step he takes the reader through is eating not just to avoid triggering inflammation, but to actively combat it. From there, it should be possible for the reader to build an anti-inflammatory cookbook, that’s not only one’s own personal repertoire of cooking, but also specifically tailored to one’s own personal responses to different ingredients.
The style of this book is very pop-science, helpful, walking-the-reader-by-the-hand through the processes involved. Dr. Cole wants to make everything as easy as possible.
Bottom line: if your diet could use an anti-inflammatory revamp, this is a top-tier guidebook for doing just that.
Click here to check out The Inflammation Spectrum, find your food triggers and reset your system!
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Watermelon vs Cucumber – Which is Healthier?
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Our Verdict
When comparing watermelon to cucumber, we picked the cucumber.
Why?
Both are good! But in the battle of the “this is mostly water” salad items, cucumber wins out.
In terms of macros they both are, as we say, mostly water. However, watermelon contains more sugar for the same amount of fiber, contributing to cucumber having the lower glycemic index.
When it comes to vitamins, watermelon does a little better; watermelon has more of vitamins A, B1, B3, B6, C, and E, while cucumber has more of vitamins B2, B5, B9, K, and choline. So, a modest 6:5 win for watermelon.
In the category of minerals, it’s a different story; watermelon has more selenium, while cucumber has more calcium, iron, magnesium, manganese, phosphorus, potassium, and zinc.
Both contain an array of polyphenols; mostly different ones from each other.
As ever, enjoy both. However, adding up the sections, we say cucumber enjoys a marginal win here.
Want to learn more?
You might like to read:
Take care!
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