Olive oil is healthy. Turns out olive leaf extract may be good for us too
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Olive oil is synonymous with the Mediterranean diet, and the health benefits of both are well documented.
Olive oil reduces the risk of heart disease, cancer, diabetes and premature death. Olives also contain numerous healthy nutrients.
Now evidence is mounting about the health benefits of olive leaves, including from studies in a recent review.
Here’s what’s in olive leaves and who might benefit from taking olive leaf extract.
What’s in olive leaves?
Olive leaves have traditionally been brewed as a tea in the Mediterranean and drunk to treat fever and malaria.
The leaves contain high levels of a type of antioxidant called oleuropein. Olives and olive oil contain this too, but at lower levels.
Generally, the greener the leaf (the less yellowish) the more oleuropein it contains. Leaves picked in spring also have higher levels compared to ones picked in autumn, indicating levels of oleuropein reduce as the leaves get older.
Olive leaves also contain other antioxidants such as hydroxytyrosol, luteolin, apigenin and verbascoside.
Antioxidants work by reducing the oxidative stress in the body. Oxidative stress causes damage to our DNA, cell membranes and tissues, which can lead to chronic diseases such as cancer and heart disease.
Are olive leaves healthy?
One review and analysis combined data from 12 experimental studies with 819 participants in total. Overall, olive leaf extract improved risk factors for heart disease. This included healthier blood lipids (fats) and lowering blood pressure.
The effect was greater for people who already had high blood pressure.
Most studies in this review gave olive leaf extract as a capsule, with daily doses of 500 milligrams to 5 grams for six to 48 weeks.
Another review and analysis published late last year looked at data from 12 experimental studies, with a total of 703 people. Some of these studies involved people with high blood lipids, people with high blood pressure, people who were overweight or obese, and some involved healthy people.
Daily doses were 250-1,000mg taken as tablets or baked into bread.
Individual studies in the review showed significant benefits in improving blood glucose (sugar) control, blood lipid levels and reducing blood pressure. But when all the data was combined, there were no significant health effects. We’ll explain why this may be the case shortly.
Another review looked at people who took oleuropein and hydroxytyrosol (the antioxidants in olive leaves). This found significant improvement in body weight, blood lipid profiles, glucose metabolism and improvements in bones, joints and cognitive function.
The individual studies included tested either the two antioxidants or olive leaf incorporated into foods such as bread and cooking oils (but not olive oil). The doses were 6-500mg per day of olive leaf extract.
So what can we make of these studies overall? They show olive leaf extract may help reduce blood pressure, improve blood lipids and help our bodies handle glucose.
But these studies show inconsistent results. This is likely due to differences in the way people took olive leaf extract, how much they took and how long for. This type of inconsistency normally tells us we need some more research to clarify the health effects of olive leaves.
Can you eat olive leaves?
Olive leaves can be brewed into a tea, or the leaves added to salads. Others report grinding olive leaves into smoothies.
However the leaves are bitter, because of the antioxidants, which can make them hard to eat, or the tea unpalatable.
Olive leaf extract has also been added to bread and other baked goods. Researchers find this improves the level of antioxidants in these products and people say the foods tasted better.
Is olive leaf extract toxic?
No, there seem to be no reported toxic effects of eating or drinking olive leaf extract.
It appears safe up to 1g a day, according to studies that have used olive leaf extract. However, there are no official guidelines about how much is safe to consume.
There have been reports of potential toxicity if taken over 85mg/kg of body weight per day. For an 80kg adult, this would mean 6.8g a day, well above the dose used in the studies mentioned in this article.
Pregnant and breastfeeding women are recommended not to consume it as we don’t know if it’s safe for them.
What should I do?
If you have high blood pressure, diabetes or raised blood lipids you may see some benefit from taking olive leaf extract. But it is important you discuss this with your doctor first and not change any medications or start taking olive leaf extract until you have spoken to them.
But there are plenty of antioxidants in all plant foods, and you should try to eat a wide variety of different coloured plant foods. This will allow you to get a range of nutrients and antioxidants.
Olive leaf and its extract is not going to be a panacea for your health if you’re not eating a healthy diet and following other health advice.
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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Cognitive Enhancement Without Drugs
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Cognitive Enhancement Without Drugs
This is Elizabeth Ricker. She’s a Harvard-and-MIT-trained neuroscientist and researcher, who now runs the “Citizen Science” DIY-neurohacking organization, NeuroEducate.
Sounds fun! What’s it about?
The philosophy that spurs on her research and practice can be summed up as follows:
❝I’m not going to leave my brain up to my doctor or [anyone else]… My brain is my own responsibility, and I’m going to do the best that I can to optimize it❞
Her goal is not just to optimize her own brain though; she wants to make the science accessible to everyone.
What’s this about Citizen Science?
“Citizen Science” is the idea that while there’s definitely an important role in society for career academics, science itself should be accessible to all. And, not just the conclusions, but the process too.
This can take the form of huge experiments, often facilitated these days by apps where we opt-in to allow our health metrics (for example) to be collated with many thousands of others, for science. It can also involve such things as we talked about recently, getting our own raw genetic data and “running the numbers” at home to get far more comprehensive and direct information than the genetic testing company would ever provide us.
For Ricker, her focus is on the neuroscience side of biohacking, thus, neurohacking.
I’m ready to hack my brain! Do I need a drill?
Happily not! Although… Bone drills for the skull are very convenient instruments that make it quite hard to go wrong even with minimal training. The drill bit has a little step/ledge partway down, which means you can only drill through the thickness of the skull itself, before the bone meeting the wider part of the bit stops you from accidentally drilling into the brain. Still, please don’t do this at home.
What you can do at home is a different kind of self-experimentation…
If you want to consider which things are genuinely resulting in cognitive enhancement and which things are not, you need to approach the matter like a scientist. That means going about it in an organized fashion, and recording results.
There are several ways cognitive enhancement can be measured, including:
- Learning and memory
- Executive function
- Emotional regulation
- Creative intelligence
Let’s look at each of them, and what can be done. We don’t have a lot of room here; we’re a newsletter not a book, but we’ll cover one of Ricker’s approaches for each:
Learning and memory
This one’s easy. We’re going to leverage neuroplasticity (neurons that fire together, wire together!) by simple practice, and introduce an extra element to go alongside your recall. Perhaps a scent, or a certain item of clothing. Tell yourself that clinical studies have shown that this will boost your recall. It’s true, but that’s not what’s important; what’s important is that you believe it, and bring the placebo effect to bear on your endeavors.
You can test your memory with word lists, generated randomly by AI, such as this one:
You’ll soon find your memory improving—but don’t take our word for it!
Executive function
Executive function is the aspect of your brain that tells the other parts how to work, when to work, and when to stop working. If you’ve ever spent 30 minutes thinking “I need to get up” but you were stuck in scrolling social media, that was executive dysfunction.
This can be trained using the Stroop Color and Word Test, which shows you words, specifically the names of colors, which will themselves be colored, but not necessarily in the color the word pertains to. So for example, you might be shown the word “red”, colored green. Your task is to declare either the color of the word only, ignoring the word itself, or the meaning of the word only, ignoring its appearance. It can be quite challenging, but you’ll get better quite quickly:
The Stroop Test: Online Version
Emotional Regulation
This is the ability to not blow up angrily at the person with whom you need to be diplomatic, or to refrain from laughing when you thought of something funny in a sombre situation.
It’s an important part of cognitive function, and success or failure can have quite far-reaching consequences in life. And, it can be trained too.
There’s no online widget for this one, but: when and if you’re in a position to safely* do so, think about something that normally triggers a strong unwanted emotional reaction. It doesn’t have to be something life-shattering, but just something that you feel in some way bad about. Hold this in your mind, sit with it, and practice mindfulness. The idea is to be able to hold the unpleasant idea in your mind, without becoming reactive to it, or escaping to more pleasant distractions. Build this up.
*if you perchance have PTSD, C-PTSD, or an emotional regulation disorder, you might want to talk this one through with a qualified professional first.
Creative Intelligence
Another important cognitive skill, and again, one that can be cultivated and grown.
The trick here is volume. A good, repeatable test is to think of a common object (e.g. a rock, a towel, a banana) and, within a time constraint (such as 15 minutes) list how many uses you can think of for that item.
Writer’s storytime: once upon a time, I was sorting through an inventory of medical equipment with a colleague, and suggested throwing out our old arterial clamps, as we had newer, better ones—in abundance. My colleague didn’t want to part with them, so I challenged him “Give me one use for these, something we could in some possible world use them for that the new clamps don’t do better, and we’ll keep them”. He said “Thumbscrews”, and I threw my hands up in defeat, saying “Fine!”, as he had technically fulfilled my condition.
What’s the hack to improve this one? Just more volume. Creativity, as it turns out, isn’t something we can expend—like a muscle, it grows the more we use it. And because the above test is repeatable (with different objects), you can track your progress.
And if you feel like using your grown creative muscle to write/paint/compose/etc your magnum opus, great! Or if you just want to apply it to the problem-solving of everyday life, also great!
In summary…
Our brain is a wonderful organ with many functions. Society expects us to lose these as we get older, but the simple, scientific truth is that we can not only maintain our cognitive function, but also enhance and grow it as we go.
Want to know more from today’s featured expert?
You might enjoy her book, “Smarter Tomorrow”, which we reviewed back in March
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The Brain As A Work-In-Progress
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And The Brain Goes Marching On!
In Tuesday’s newsletter, we asked you “when does the human brain stop developing?” and got the above-depicted, below-described, set of responses:
- About 64% of people said “Never”
- About 16% of people said “25 years”
- About 9% of people said “65 years”
- About 5% of people said “13 years”
- About 3% of people said “18 years”
- About 3% of people said “45 years”
Some thoughts, before we get into the science:
An alternative wording for the original question was “when does the human brain finish developing”; the meaning is the same but the feeling is slightly different:
- “When does the human brain stop developing?” focuses attention on the idea of cessation, and will skew responses to later ages
- When does the human brain finish developing?” focuses on attention on a kind of “is it done yet?” and will skew responses to earlier ages
Ultimately, since we had to chose one word or another, we picked the shortest one, but it would have been interesting if we could have done an A/B test, and asked half one way, and half the other way!
Why we picked those ages
We picked those ages as poll options for reasons people might be drawn to them:
- 13 years: in English-speaking cultures, an important milestone of entering adolescence (note that the concept of a “teenager” is not precisely universal as most languages do not have “-teen” numbers in the same way; the concept of “adolescent” may thus be tied to other milestones)
- 18 years: age of legal majority in N. America and many other places
- 25 years: age popularly believed to be when the brain is finished developing, due to a study that we’ll talk about shortly (we guess that’s why there’s a spike in our results for this, too!)
- 45 years: age where many midlife hormonal changes occur, and many professionals are considered to have peaked in competence and start looking towards retirement
- 65 years: age considered “senior” in much of N. America and many other places, as well as the cut-off and/or starting point for a lot of medical research
Notice, therefore, how a lot of things are coming from places they really shouldn’t. For example, because there are many studies saying “n% of people over 65 get Alzheimer’s” or “n% of people over 65 get age-related cognitive decline”, etc, 65 becomes the age where we start expecting this—because of an arbitrary human choice of where to draw the cut-off for the study enrollment!
Similarly, we may look at common ages of legal majority, or retirement pensions, and assume “well it must be for a good reason”, and dear reader, those reasons are more often economically motivated than they are biologically reasoned.
So, what does the science say?
Our brains are never finished developing: True or False?
True! If we define “finished developing” as “we cease doing neurogenesis and neuroplasticity is no longer in effect”.
Glossary:
- Neurogenesis: the process of creating new brain cells
- Neuroplasticity: the process of the brain adapting to changes by essentially rebuilding itself to suit our perceived current needs
We say “perceived” because sometimes neuroplasticity can do very unhelpful things to us (e.g: psychological trauma, or even just bad habits), but on a biological level, it is always doing its best to serve our overall success as an organism.
For a long time it was thought that we don’t do neurogenesis at all as adults, but this was found to be untrue:
How To Grow New Brain Cells (At Any Age)
Summary of conclusions of the above: we’re all growing new brain cells at every age, even if we be in our 80s and with Alzheimer’s disease, but there are things we can do to enhance our neurogenic potential along the way.
Neuroplasticity will always be somewhat enhanced by neurogenesis (after all, new neurons get given jobs to do), and we reviewed a great book about the marvels of neuroplasticity including in older age:
Our brains are still developing up to the age of 25: True or False?
True! And then it keeps on developing after that, too. Now this is abundantly obvious considering what we just talked about, but see what a difference the phrasing makes? Now it makes it sound like it stops at 25, which this statement doesn’t claim at all—it only speaks for the time up to that age.
A lot of the popular press about “the brain isn’t fully mature until the age of 25” stems from a 2006 study that found:
❝For instance, frontal gray matter volume peaks at about age 11.0 years in girls and 12.1 years in boys, whereas temporal gray matter volume peaks at about age at 16.7 years in girls and 16.2 years in boys. The dorsal lateral prefrontal cortex, important for controlling impulses, is among the latest brain regions to mature without reaching adult dimensions until the early 20s.❞
Source: Structural Magnetic Resonance Imaging of the Adolescent Brain
There are several things to note here:
- The above statement is talking about the physical size of the brain growing
- Nowhere does he say “and stops developing at 25”
However… The study only looked at brains up to the age of 25. After that, they stopped looking, because the study was about “the adolescent brain” so there has to be a cut-off somewhere, and that was the cut-off they chose.
This is the equivalent of saying “it didn’t stop raining until four o’clock” when the reality is that four o’clock is simply when you gave up on checking.
The study didn’t misrepresent this, by the way, but the popular press did!
Another 2012 study looked at various metrics of brain development, and found:
- Synapse overproduction into the teens
- Cortex pruning into the late 20s
- Prefrontal pruning into middle age at least (they stopped looking)
- Myelination beyond middle age (they stopped looking)
Source: Experience and the developing prefrontal cortex ← check out figure 1, and make sure you’re looking at the human data not the rat data
So how’s the most recent research looking?
Here’s a 2022 study that looked at 123,984 brain scans spanning the age range from mid-gestation to 100 postnatal years, and as you can see from its own figure 1… Most (if not all) brain-things keep growing for life, even though most slow down at some point, they don’t stop:
Brain charts for the human lifespan ← check out figure 1; don’t get too excited about the ventricular volume column as that is basically “brain that isn’t being a brain”. Do get excited about the rest, though!
Want to know how not to get caught out by science being misrepresented by the popular press? Check out:
How Science News Outlets Can Lie To You (Yes, Even If They Cite Studies!)
Take care!
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How Much Does A Vegan Diet Affect Biological Aging?
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Slow Your Aging, One Meal At A Time
This one’s a straightforward one today, and the ““life hack” can be summed up:
Enjoy a vegan diet to enjoy younger biological age.
First, what is biological age?
Biological age is not one number, but a collection of numbers, as per different biomarkers of aging, including:
- Visual markers of aging (e.g. wrinkles, graying hair)
- Performative markers of aging (e.g. mobility tests)
- Internal functional markers of aging (e.g. tests for cognitive decline, eyesight, hearing, etc)
- Cellular markers of aging (e.g. telomere length)
We wrote more about this here:
Age & Aging: What Can (And Can’t) We Do About It?
A vegan diet may well impact multiple of those categories of aging, but today we’re highlighting a study (hot off the press; published only a few days ago!) that looks at its effect on that last category: cellular markers of aging.
There’s an interesting paradox here, because this category is:
- the most easily ignorable; because we all feel it if our knees are giving out or our skin is losing elasticity, but who notices if telomeres’ T/S ratio changed by 0.0407? ← the researchers, that’s who, as this difference is very significant
- the most far-reaching in its impact, because cellular aging in turn has an effect on all the other markers of aging
Second, how much difference does it make, and how do we know?
The study was an eight-week interventional identical twin study. This means several things, to start with:
- Eight weeks is a rather short period of time to accumulate cellular aging, let alone for an intervention to accumulate a significant difference in cellular aging—but it did. So, just imagine what difference it might make in a year or ten!
- Doing an interventional study with identical twin pairs already controlled for a lot of factors, that are usually confounding variables in population / cohort / longitudinal / observational studies.
Factors that weren’t controlled for by default by using identical twins, were controlled for in the experiment design. For example, twin pairs were rejected if one or more twin in a given pair already had medical conditions that could affect the outcome:
❝Inclusion criteria involved participants aged ≥18, part of a willing twin pair, with BMI <40, and LDL-C <190 mg/dL. Exclusions included uncontrolled hypertension, metabolic disease, diabetes, cancer, heart/renal/liver disease, pregnancy, lactation, and medication use affecting body weight or energy.
Eligibility was determined via online screening, followed by an orientation meeting and in-person clinic visit. Randomization occurred only after completing baseline visits, dietary recalls, and questionnaires for both twins❞
~ Dr. Varun Dwaraka et al. ← there’s a lot of “et al.” to this one; the paper had 16 collaborating authors!
As to the difference it made over the course of the 8 weeks…
❝Various measures of epigenetic age acceleration (PC GrimAge, PC PhenoAge, DunedinPACE) were assessed, along with system-specific effects (Inflammation, Heart, Hormone, Liver, and Metabolic).
Distinct responses were observed, with the vegan cohort exhibiting significant decreases in overall epigenetic age acceleration, aligning with anti-aging effects of plant-based diets. Diet-specific shifts were noted in the analysis of methylation surrogates, demonstrating the influence of diet on complex trait prediction through DNA methylation markers.❞
~ Ibid.
You can read the whole paper here (it goes into a lot more detail than we have room to here, and also gives infographics, charts, numbers, the works):
Were they just eating more healthily, though?
Well, arguably yes, as the results show, but to be clear:
The omnivorous diet compared to the vegan diet in this study was also controlled; both groups were given a healthy meal plan for their respective diet. So this wasn’t a case of “any omnivorous diet vs healthy vegan diet”, but rather “healthy omnivorous diet vs healthy vegan diet”.
Again, the paper itself has the full details—a short version is that it involved a healthy meal kit delivery service, followed by ongoing dietician involvement in an equal and carefully-controlled fashion.
So, aside from that one group had an omnivorous meal plan and the other vegan, both groups received the same level of “healthy eating” support, guidance, and oversight.
But isn’t [insert your preferred animal product here] healthy?
Quite possibly! For general health, general scientific consensus is that eating at least mostly plants is best, red meat is bad, poultry is neutral in moderation, fish is good in moderation, dairy is good in moderation if fermented, eggs are good in moderation if not fried.
This study looked at the various biomarkers of aging that we listed, and not every possible aspect of health—there’s more science yet to be done, and the researchers themselves are calling for it.
It also bears mentioning that for some (relatively few, but not insignificantly few) people, extant health conditions may make a vegan diet unhealthy or otherwise untenable. Do speak with your own doctor and/or dietician if unsure.
See also: Do We Need Animal Products To Be Healthy?
We would hypothesize, by the way, that the anti-aging benefits of a vegan diet are probably proportional to abstention from animal products—meaning that even if you simply have some “vegan days”, while still consuming animal products other days, you’ll still get benefit for the days you abstained. That’s just our hypothesis though.
Take care!
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Can I Eat That? – by Jenefer Roberts
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The answer to the question in the title is: you can eat pretty much anything, if you’re prepared for the consequences!
This book looks to give you the information to make your own decisions in that regard. There’s a large section on the science of glucose metabolism in the context of food (other aspects of glucose metabolism aren’t covered), so you will not simply be told “raw carrots are good; mashed potatoes are bad”, you’ll understand many factors that affect it, e.g:
- Macronutrient profiles of food and resultant base glycemic indices
- How the glycemic index changes if you cut something, crush it, mash it, juice it, etc
- How the glycemic index changes if you chill something, heat it, fry it, boil it, etc
- The many “this food works differently in the presence of this other food” factors
- How your relative level of insulin resistance affects things itself
…and much more.
The style is simple and explanatory, without deep science, but with good science and comprehensive advice.
There are also the promised recipes; they’re in an appendix at the back and aren’t the main meat of the book, though.
Bottom line: if you’ve ever found it confusing working out what works how in the mysterious world of diabetes nutrition, this book is a top tier demystifier.
Click here to check out Can I Eat That?, and gain confidence in your food choices!
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What’s So Special About Alpha-Lipoic Acid?
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The Access-All-Areas Antioxidant
Alpha-Lipoic Acid (ALA) is one of the most bioavailable antioxidants in existence. A bold claim, but most antioxidants are only water-soluble or fat-soluble, whereas ALA is both. This has far-reaching implications—and we mean that literally, because its “go everywhere” status means that it can access (and operate in) all living cells of the human body.
We make it inside our body, and we can also get it in our diet, or take it as a supplement.
What foods contain it?
The richest food sources are:
- For the meat-eaters: organ meats
- For everyone: broccoli, tomatoes, & spinach
However, supplements are more efficient at delivering it, by several orders of magnitude:
Read more: Lipoic acid – biological activity and therapeutic potential
What are its benefits?
Most of its benefits are the usual benefits you would expect from any antioxidant, just, more of it. In particular, reduced inflammation and slowed skin aging are common reasons that people take ALA as a supplement.
Does it really reduce inflammation?
Yes, it does. This one’s not at all controversial, as this systematic review of studies shows:
(C-reactive protein is a marker of inflammation)
Does it really reduce skin aging?
Again yes—which again is not surprising for such a potent antioxidant; remember that oxidative stress is one of the main agonists of cellular aging:
As a special feature, ALA shows particular strength against sun-related skin aging, because of how it protects against UV radiation and increases levels of gluthianone, which also helps:
- Photochemical stability of lipoic acid and its impact on skin ageing
- Modern approach to topical treatment of aging skin
Where can I get some?
We don’t sell it, but here for your convenience is an example product on Amazon
Enjoy!
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Is TikTok right? Can adding a teaspoon of cinnamon to your coffee help you burn fat?
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Cinnamon has been long used around the world in both sweet and savoury dishes and drinks.
But a new TikTok trend claims adding a teaspoon of cinnamon to your daily coffee (and some cocoa to make it more palatable) for one week can help you burn fat. Is there any truth to this?
Evannovostro/Shutterstock Not all cinnamon is the same
There are two types of cinnamon, both of which come from grinding the bark of the cinnamomum tree and may include several naturally occurring active ingredients.
Cassia cinnamon is the most common type available in grocery stores. It has a bitter taste and contains higher levels of one of the active ingredient cinnamaldehyde, a compound that gives cinnamon its flavour and odour. About 95% of cassia cinnamon is cinnamaldehyde.
The other is Ceylon cinnamon, which tastes sweeter. It contains about 50-60% cinnamaldehyde.
Does cinnamon burn fat? What does the research say?
A review of 35 studies examined whether consuming cinnamon could affect waist circumference, which is linked to increased body fat levels. It found cinnamon doses below 1.5 grams per day (around half a teaspoon) decreased waist circumference by 1.68cm. However, consuming more than 1.5g/day did not have a significant effect.
A meta-analysis of 21 clinical trials with 1,480 total participants found cinnamon also reduced body mass index (BMI) by 0.40kg/m² and body weight by 0.92kg. But it did not change the participants’ composition of fat or lean mass.
Another umbrella review, which included all the meta-analyses, found a small effect of cinnamon on weight loss. Participants lost an average of 0.67kg and reduced their BMI by 0.45kg/m².
The effect appears small. Radu Sebastian/Shutterstock So overall, the weight loss we see from these high-quality studies is very small, ranging anywhere from two to six months and mostly with no change in body composition.
The studies included people with different diseases, and most were from the Middle East and/or the Indian subcontinent. So we can’t be certain we would see this effect in people with other health profiles and in other countries. They were also conducted over different lengths of time from two to six months.
The supplements were different, depending on the study. Some had the active ingredient extracted from cinnamon, others used cinnamon powder. Doses varied from 0.36g to 10g per day.
They also used the two different types of cinnamon – but none of the studies used cinnamon from the grocery store.
How could cinnamon result in small amounts of weight loss?
There are several possible mechanisms.
It appears to allow blood glucose (sugar) to enter the body’s cells more quickly. This lowers blood glucose levels and can make insulin work more effectively.
It also seems to improve the way we break down fat when we need it for energy.
Finally, it may make us feel fuller for longer by slowing down how quickly the food is released from our stomach into the small intestine.
What are the risks?
Cinnamon is generally regarded as safe when used as a spice in cooking and food.
However, in recent months the United States and Australia have issued health alerts about the level of lead and other heavy metals in some cinnamon preparations.
Lead enters as a contaminant during growth (from the environment) and in harvesting. In some cases, it has been suggested there may have been intentional contamination.
Some people can have side effects from cinnamon, including gastrointestinal pain and allergic reactions.
One of the active ingredients, coumarin, can be toxic for some people’s livers. This has prompted the European Food Authority to set a limit of 0.1mg/kg of body weight.
Cassia cinnamon contains up to 1% of coumarin, and the Ceylon variety contains much less, 0.004%. So for people weighing above 60kg, 2 teaspoons (6g) of cassia cinnamon would bring them over the safe limit.
What about the coffee and cocoa?
Many people may think coffee can also help us lose weight. However there isn’t good evidence to support this yet.
An observational study found drinking one cup of regular coffee was linked to a reduction in weight that is gained over four years, but by a very small amount: an average of 0.12kg.
Good-quality cocoa and dark chocolate have also been shown to reduce weight. But again, the weight loss was small (between 0.2 and 0.4kg) and only after consuming it for four to eight weeks.
So what does this all mean?
Using cinnamon may have a very small effect on weight, but it’s unlikely to deliver meaningful weight loss without other lifestyle adjustments.
We also need to remember these trials used products that differ from the cinnamon we buy in the shops. How we store and how long we keep cinnamon might also impact or degrade the active ingredients.
And consuming more isn’t going to provide additional benefit. In fact, it could increase your risk of side effects.
So if you enjoy the taste of cinnamon in your coffee, continue to add it, but given its strong taste, you’re likely to only want to add a little.
And no matter how much we’d like this to be true, we certainly won’t gain any fat-loss benefits by consuming cinnamon on doughnuts or in buns, due to their high kilojoule count.
If you want to lose weight, there are evidence-backed approaches that won’t spoil your morning coffee.
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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