Matcha is having a moment. What are the health benefits of this green tea drink?
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Matcha has experienced a surge in popularity in recent months, leading to reports of global shortages and price increases.
If you haven’t been caught up in the craze, matcha is a powdered version of green tea. On a cafe menu you might see a hot or iced matcha latte, or even a matcha-flavoured cake or pastry. A quick google brings up countless recipes incorporating matcha, both sweet and savoury.
Retailers and cafe owners have suggested the main reasons for matcha’s popularity include its “instagrammable” looks and its purported health benefits.
But what are the health benefits of matcha? Here’s what the evidence says.
First, what is matcha?
Matcha is a finely ground powder of green tea leaves, which come from the plant Camellia sinensis. This is the same plant used to make green and black tea. However, the production process differentiates matcha from green and black tea.
For matcha, the tea plant is grown in shade. Once the leaves are harvested, they’re steamed and dried and the stems are removed. Then the leaves are carefully ground at controlled temperatures to form the powder.
The production process for green tea is simpler. The leaves are picked from the unshaded plants, heated and then dried. We then steep the dried leaves in hot water to get tea (whereas with matcha the whole leaf is consumed).
With black tea, after the leaves are picked they’re exposed to air, which leads to oxidation. This makes the leaves black and gives the tea a different flavour.
A source of phytonutrients
Phytonutrients are chemical compounds found in plants which have a range of benefits for human health. Matcha contains several.
Chlorophyll gives plants such as Camellia sinensis their green colour. There’s some evidence chlorophyll may have health benefits – including anti-inflammatory, anti-cancer and anti-obesity effects – due to its antioxidant properties. Antioxidants neutralise free radicals, which are unstable molecules that harm our cells.
Theanine has been shown to improve sleep and reduce stress and anxiety. The only other known dietary source of theanine is mushrooms.
Caffeine is a phytonutrient we know well. Aside from increasing alertness, caffeine has also demonstrated antioxidant effects and some protection against a range of chronic and neurodegenerative diseases. However, too much caffeine can have negative side effects.
Interestingly, shading the plants while growing appears to change the nutritional composition of the leaf and may lead to higher levels of these phytonutrients in matcha compared to green tea.
Another compound worth mentioning is called catechins, of which there are several different types. Matcha powder similarly has more catechins than green tea. They are strong antioxidants, which have been shown to have protective effects against bacteria, viruses, allergies, inflammation and cancer. Catechins are also found in apples, blueberries and strawberries.
What are the actual health benefits?
So we know matcha contains a variety of phytonutrients, but does this translate to noticeable health benefits?
A review published in 2023 identified only five experimental studies that have given matcha to people. These studies gave participants about 2–4g of matcha per day (equivalent to 1–2 teaspoons of matcha powder), compared to a placebo, as either a capsule, in tea or in foods. Matcha decreased stress and anxiety, and improved memory and cognitive function. There was no effect on mood.
A more recent study showed 2g of matcha in older people aged 60 to 85 improved sleep quality. However, in younger people aged 27 to 64 in another study, matcha had little effect on sleep.
A study in people with obesity found no difference in the weight loss observed between the matcha group and the control group. This study did not randomise participants, and people knew which group they had been placed in.
It could be hypothesised that given you consume all of the leaf, and given levels of some phytonutrients may be higher due to the growing conditions, matcha may have more nutritional benefits than green tea. But to my knowledge there has been no direct comparison of health outcomes from green tea compared to matcha.
There’s lots of evidence for green tea
While to date a limited number of studies have looked at matcha, and none compared matcha and green tea, there’s quite a bit of research on the health benefits of drinking green tea.
A systematic review of 21 studies on green tea has shown similar benefits to matcha for improvements in memory, plus evidence for mood improvement.
There’s also evidence green tea provides other health benefits. Systematic reviews have shown green tea leads to weight loss in people with obesity, lower levels of certain types of cholesterol, and reduced blood pressure. Green tea may also lower the risk of certain types of cancer.
So, if you can’t get your hands on matcha at the moment, drinking green tea may be a good way to get your caffeine hit.
Although the evidence on green tea provides us with some hints about the health benefits of matcha, we can’t be certain they would be the same. Nonetheless, if your local coffee shop has a good supply of matcha, there’s nothing to suggest you shouldn’t keep enjoying matcha drinks.
However, it may be best to leave the matcha croissant or cronut for special occasions. When matcha is added to foods with high levels of added sugar, salt and saturated fat, any health benefits that could be attributed to the matcha may be negated.
Evangeline Mantzioris, Program Director of Nutrition and Food Sciences, Accredited Practising Dietitian, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Meditation That You’ll Actually Enjoy
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Meditation That You’ll Actually Enjoy
We previously wrote about…
No-Frills, Evidence-Based Mindfulness
this is a great primer, by the way, for the science and simplicity of mindfulness, along with the simplest mindfulness meditation to get you going.
Today, we’re going to have some fun with meditation.
First: The Problem
Once the usefulness and health benefits of meditation have been established, often people want to meditate, but complain they don’t have the time.
But that’s not the real reason, though, is it?
Let’s face it, a basic meditation can give benefits within two minutes. Or within two breaths, for that matter. So, it’s not really for a lack of time.
The real reason is because it doesn’t feel productive, and it’s not fun. For us to feel motivated to do a thing, usually we need at least one or the other. And even if we know it really is productive, it not feeling that way will hobble us.
So instead, let us make things a little more fun, with…
Meditation games!
As it turns out, there are good kinds of meditation with which one can have a little fun.
Catch the next thought
A common feature of many meditative practices is the experience of having fewer, or ideally no, thoughts.
But it’s hard to enact a negative, and thoughts keep coming.
So instead, make yourself comfortable, settle in, and lie in wait for thoughts. When one comes along, pounce on it in your mind. And then release it, and wait for the next.
At first, your thoughts may be coming thick and fast, but soon, you’ll find the pauses between them lengthening, and you have moments of contented not-knowing of what the next thought will be before it comes along.
This state of relaxed, ready alertness, calm and receptive, is exactly what we’re hoping to find here. But don’t worry about that while you’re busy lying in wait for the next wild thought to come along
Counting breaths
Many meditative practices involve focus on one’s breath. But it’s easy for attention to wander!
This game is a simple one. Count your breaths, not trying to change your rate of breathing at all, just letting it be, and see how high you can get before you lose count.
Breathing in and out, once, counts as one breath, by the way.
You may find that your rate of breathing naturally slows while you’re doing this. That’s fine; let it. It’ll add to the challenge of the game, because before long there will be lengthy pauses between each number.
If you lose count, just start again, and see if you can beat your high score.
This meditation game is an excellent exercise to build for sustained focus, while also improving the quality of breathing (as a side-effect of merely paying attention to it).
Hot spot, cold spot
The above two meditation games were drawn from Japanese and Chinese meditative practices, zen and qigong respectively; this one’s from an Indian meditative practice, yoga nidra. But for now, just approach it with a sense of playful curiosity, for best results.
Make yourself comfortable, lying on your back, arms by your sides.
Take a moment first to pay attention to each part of your body from head to toe, and release any tension that you may be holding along the way.
First part: mentally scan your body for where it feels warmest, or most active, or most wanting of attention (for example if there is pain, or an itch, or some other sensation); that’s your “hot spot” for the moment.
Second part: mentally scan your body for where it feels coolest, or most inert, or almost like it’s not a part of your body at all; that’s your “cold spot” for the moment.
Now, see if you can flip them. Whether you can or can’t, notice if your “hot spot” or “cold spot” moves, or if you can move them consciously.
This meditation game is a great exercise to strengthen interoception and somatic awareness in general—essential for being able to “listen to your body”!
Closing thoughts
All three practices above have very serious reasons and great benefits, but make sure you don’t skip enjoyment of the fun aspects!
Being “young at heart” is, in part, to do with the ability to enjoy—literally, to take joy in—the little things in life.
With that in mind, all we have left to say here is…
Enjoy!
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Nudge – by Richard Thaler & Cass Sunstein
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How often in life do we make a suboptimal decision that ends up plaguing us for a long time afterwards? Sometimes, a single good or bad decision can even directly change the rest of our life.
So, it really is important that we try to optimize the decisions we do make.
Professors Richard Thaler and Cass Sunstein look at all kinds of decision-making in this book. Their goal, as per the subtitle, is “improving decisions about health, wealth, and happiness”.
For the most part, the book concentrates on “nudges”. Small factors that influence our decisions one way or another.
Most importantly: that some of them are very good reasons to be nudged; others, very bad ones. And they often look similar.
Where this book excels is in highlighting the many ways we make decisions without even thinking about it… or we think about it, but only down a prescribed, foreseen track, to an externally expected conclusion (for example, an insurance company offering three packages, but two of them exist only to direct you to the “correct” choice).
A weakness of the book is that in some aspects it’s a little inconsistent. The authors describe their economic philosophy as “libertarian paternalism”, and as libertarians they’re against mandates, except when as paternalists they’re for them. But, if we take away their labels, this boils down to “some mandates can be good and some can be bad”, which would not be so inconsistent after all.
Bottom line: if you’d like to better understand your own decision-making processes through the eyes of policy-setting economists (especially Sunstein, who worked for the White House Office of Information & Regulatory Affairs) whose job it is to make sure you make the “right” decisions, then this is a very enlightening book.
Click here to check out Nudge and improve your decision-making clarity!
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Avoiding Razor Burn, Ingrown Hairs & Other Shaving Irritation
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How Does The Video Help?
Dr. Simi Adedeji’s incredibly friendly persona makes this video (below) on avoiding skin irritation, ingrown hairs, and razor burn after shaving a pleasure to watch.
To keep things simple, she breaks down her guide into 10 simple tips.
What Are The 10 Simple Tips?
Tip 1: Prioritize Hydration. Shaving dry hair can lead to increased skin irritation, so Dr. Simi recommends moistening the hair by showering or using a warm, wet towel for 2-4 minutes before getting the razor out.
Tip 2: Avoid Dry Shaving. Dry shaving not only removes hair but can also remove the protective upper layer of skin, which contributes to razor burn. To prevent this, simply use some shaving gel or cream.
Tip 3: Keep Blades New and Sharp. This one’s simple: dull blades can cause skin irritation, whilst a sharp blade ensures a smoother and more comfortable shaving experience.
Tip 4: Avoid Shaving the Same Area Repeatedly. Multiple passes over the same area can remove skin layers, leading to cuts and irritation. Aim to shave each area only once for safer results.
Tip 5: Consider Hair Growth Direction. Shaving in the direction of hair growth results in less irritation, although it may not provide the closest shave.
Tip 6: Apply Gentle Pressure While Shaving. Excessive pressure can lead to cuts and nicks. Use a gentle touch to reduce these risks.
Tip 7: Incorporate Exfoliation into Your Routine. Exfoliating helps release trapped hairs and reduces the risk of ingrown hairs. For those with sensitive skin, it’s recommended to exfoliate either two days before or after shaving.
Tip 8: Avoid Excessive Skin Stretching. Over-stretching the skin during shaving can cause hairs to become ingrown.
Tip 9: Moisturize After Shaving. Shaving can compromise the skin barrier, leading to dryness. Using a moisturizer can be a simple fix.
Tip 10: Regularly Rinse Your Blade. Make sure that, during the shaving process, you are rinsing your blade frequently to remove hair and skin debris. This keeps it sharp during your shave.
If this summary doesn’t do it for you, then you can watch the full video here:
How did you find that video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!
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The Wandering Mind – by Dr. Michael Corballis
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Our mind’s tendency to wander can be a disability, but could it also be a superpower? Dr. Corballis makes the case for such.
While many authors focus on, well, how to focus, Dr. Corballis argues in this book that our wandering imagination can be more effective at problem-solving and creative tasks, than a focused, blinkered mind.
The book’s a quick read (184 pages of quite light reading), and yet still quite dense with content. He takes us on a tour of the brain, theory of mind, the Default Mode Network (where a lot of the brain’s general ongoing organization occurs), learning, memory, forgetting, and creativity.
Furthermore, he cites (and explains) studies showing what kinds of “breaks” from mental work allow the wandering mind to do its thing at peak efficiency, and what kinds of breaks are counterproductive. Certainly this has practical applications for all of us!
Bottom line: if you’d like to be less frustrated by your mind’s tendency to wander, this is a fine book to show how to leverage that trait to your benefit.
Click here to check out The Wandering Mind, and set yours onto more useful tracks!
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Addiction Myths That Are Hard To Quit
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Which Addiction-Quitting Methods Work Best?
In Tuesday’s newsletter we asked you what, in your opinion, is the best way to cure an addiction. We got the above-depicted, below-described, interesting distribution of responses:
- About 29% said: “Addiction cannot be cured; once an addict, always an addict”
- About 26% said “Cold turkey (stop 100% and don’t look back)”
- About 17% said “Gradually reduce usage over an extended period of time”
- About 11% said “A healthier, but somewhat like-for-like, substitution”
- About 9% said “Therapy (whether mainstream, like CBT, or alternative, like hypnosis)”
- About 6% said “Peer support programs and/or community efforts (e.g. church etc)”
- About 3% said “Another method (mention it in the comment field)” and then did not mention it in the comment field
So what does the science say?
Addiction cannot be cured; once an addict, always an addict: True or False?
False, which some of the people who voted for it seemed to know, as some went on to add in the comment field what they thought was the best way to overcome the addiction.
The widespread belief that “once an addict, always an addict” is a “popular truism” in the same sense as “once a cheater, always a cheater”. It’s an observation of behavioral probability phrased as a strong generalization, but it’s not actually any kind of special unbreakable law of the universe.
And, certainly the notion that one cannot be cured keeps membership in many 12-step programs and similar going—because if you’re never cured, then you need to stick around.
However…
❝What is the definition of addiction?
Addiction is a treatable, chronic medical disease involving complex interactions among brain circuits, genetics, the environment, and an individual’s life experiences. People with addiction use substances or engage in behaviors that become compulsive and often continue despite harmful consequences.
Prevention efforts and treatment approaches for addiction are generally as successful as those for other chronic diseases.❞
~ American Society of Addiction Medicine
Or if we want peer-reviewed source science, rather than appeal to mere authority as above, then:
❝What is drug addiction?
Addiction is defined as a chronic, relapsing disorder characterized by compulsive drug seeking and use despite adverse consequences. It is considered a brain disorder, because it involves functional changes to brain circuits involved in reward, stress, and self-control. Those changes may last a long time after a person has stopped taking drugs.
Addiction is a lot like other diseases, such as heart disease. Both disrupt the normal, healthy functioning of an organ in the body, both have serious harmful effects, and both are, in many cases, preventable and treatable.❞
~ Nora D. Volkow (Director, National Institute of Drug Abuse)
Read more: Drugs, Brains, and Behavior: The Science of Addiction
In short: part of the definition of addiction is the continued use; if the effects of the substance are no longer active in your physiology, and you are no longer using, then you are not addicted.
Just because you would probably become addicted again if you used again does not make you addicted when neither the substance nor its after-effects are remaining in your body. Otherwise, we could define all people as addicted to all things based on “well if they use in the future they will probably become addicted”.
This means: the effects of addiction can and often will last for long after cessation of use, but ultimately, addiction can be treated and cured.
(yes, you should still abstain from the thing to which you were formerly addicted though, or you indeed most probably will become addicted again)
Cold turkey is best: True or False?
True if and only if certain conditions are met, and then only for certain addictions. For all other situations… False.
To decide whether cold turkey is a safe approach (before even considering “effective”), the first thing to check is how dangerous the withdrawal symptoms are. In some cases (e.g. alcohol, cocaine, heroin, and others), the withdrawal symptoms can kill.
That doesn’t mean they will kill, so knowing (or being!) someone who quit this way does not refute this science by counterexample. The mortality rates that we saw while researching varied from 8% to 37%, so most people did not die, but do you really want (yourself or a loved one) to play those odds unnecessarily?
See also: Detoxification and Substance Abuse Treatment
Even in those cases where it is considered completely safe for most people to quit cold turkey, such as smoking, it is only effective when the quitter has appropriate reliable medical support, e.g.
- Without support: 3–5% success rate
- With support: 22% success rate
And yes, that 22% was for the “abrupt cessation” group; the “gradual cessation” group had a success rate of 15.5%. On which note…
Gradual reduction is the best approach: True or False?
False based on the above data, in the case of addictions where abrupt cessation is safe. True in other cases where abrupt cessation is not safe.
Because if you quit abruptly and then die from the withdrawal symptoms, then well, technically you did stay off the substance for the rest of your life, but we can’t really claim that as a success!
A healthier, but somewhat like-for-like substitution is best: True or False?
True where such is possible!
This is why, for example, medical institutions recommend the use of buprenorphine (e.g. Naloxone) in the case of opioid addiction. It’s a partial opioid receptor agonist, meaning it does some of the job of opioids, while being less dangerous:
It’s also why vaping—despite itself being a health hazard—is recommended as a method of quitting smoking:
Similarly, “zero alcohol drinks that seem like alcohol” are a popular way to stop drinking alcohol, alongside other methods:
This is also why it’s recommended that if you have multiple addictions, to quit one thing at a time, unless for example multiple doctors are telling you otherwise for some specific-to-your-situation reason.
Take care!
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Mindsight – by Dr. Daniel Siegel
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A lot of books these days bear the subtitle “The New Science Of…”, but usually it’s not new, and often it’s not even science. So how does this one measure up?
- Is it new? The core ideas are mostly very old, but some of the interventions are new in presentation—and backed by relatively recent research—so we can give him this one on a technicality at least
- It is science? Yes! The author is a clinician (a psychatric clinician, specifically) and there’s nothing here that doesn’t have its foundations in robust science.
So, what’s this “mindsight”, then? Dr. Siegel wants to express to us a concept “for which no word currently exists”, so he had to make one up, to convey the idea of having a conscious awareness of what is going on in our brain, on an experiential basis. In other words: “mindfulness”. There was totally already a word for this, which he goes on to lampshade not very far into the book.
Nevertheless, we’ll forgive him a little copywriting swizzle with the title, because the content here is genuinely top-tier.
In the book, many ideas from many other pop-psychology books are covered, in useful, practical, no-nonsense fashion, laying out tools and interventions to strengthen various parts of our brain and our relationship with same.
Bottom line: this is the most comprehensive, science-centric, book on mindfulness that this reviewer has read.
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