If you’re worried about inflammation, stop stressing about seed oils and focus on the basics
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You’ve probably seen recent claims online seed oils are “toxic” and cause inflammation, cancer, diabetes and heart disease. But what does the research say?
Overall, if you’re worried about inflammation, cancer, diabetes and heart disease there are probably more important things to worry about than seed oils.
They may or may not play a role in inflammation (the research picture is mixed). What we do know, however, is that a high-quality diet rich in unprocessed whole foods (fruits, vegetables, nuts, seeds, grains and lean meats) is the number one thing you can to do reduce inflammation and your risk of developing diseases.
Rather than focusing on seed oils specifically, reduce your intake of processed foods more broadly and focus on eating fresh foods. So don’t stress out too much about using a bit of seed oils in your cooking if you are generally focused on all the right things.
What are seed oils?
Seed oils are made from whole seeds, such as sunflower seeds, flax seeds, chia seeds and sesame seeds. These seeds are processed to extract oil.
The most common seed oils found at grocery stores include sesame oil, canola oil, sunflower oil, flaxseed oil, corn oil, grapeseed oil and soybean oil.
Seed oils are generally affordable, easy to find and suitable for many dishes and cuisines as they often have a high smoke point.
However, most people consume seed oils in larger amounts through processed foods such as biscuits, cakes, chips, muesli bars, muffins, dipping sauces, deep-fried foods, salad dressings and margarines.
These processed foods are “discretionary”, meaning they’re OK to have occasionally. But they are not considered necessary for a healthy diet, nor recommended in our national dietary guidelines, the Australian Guide for Healthy Eating.
Gleb Usovich/Shutterstock
I’ve heard people say seed oils ‘promote inflammation’. Is that true?
There are two essential types of omega fatty acids: omega-3 and omega-6. These are crucial for bodily functions, and we must get them through our diet since our bodies cannot produce them.
While all oils contain varying levels of fatty acids, some argue an excessive intake of a specific omega-6 fatty acid in seed oils called “linoleic acid” may contribute to inflammation in the body.
There is some evidence linoleic acid can be converted to arachidonic acid in the body and this may play a role in inflammation. However, other research doesn’t support the idea reducing dietary linoleic acid affects the amount of arachidonic acid in your body. The research picture is not clear cut.
But if you’re keen to reduce inflammation, the best thing you can do is aim for a healthy diet that is:
- high in antioxidants (found in fruits and vegetables)
- high in “healthy”, unsaturated fatty acids (found in fatty fish, some nuts and olive oil, for example)
high in fibre (found in carrots, cauliflower, broccoli and leafy greens) and prebiotics (found in onions, leeks, asparagus, garlic and legumes)
low in processed foods.
If reducing inflammation is your goal, it’s probably more meaningful to focus on these basics than on occasional use of seed oils.
Kiian Oksana/Shutterstock
What about seed oils and heart disease, cancer or diabetes risk?
Some popular arguments against seed oils come from data from single studies on this topic. Often these are observational studies where researchers do not make changes to people’s diet or lifestyle.
To get a clearer picture, we should look at meta-analyses, where scientists combine all the data available on a topic. This helps us get a better overall view of what’s going on.
A 2022 meta-analysis of randomised controlled trials investigated the relationship between supplementation with omega-6 fatty acid (often found in seed oils) and cardiovascular disease risk (meaning disease relating to the heart and blood vessels).
The researchers found omega-6 intake did not affect the risk for cardiovascular disease or death but that further research is needed for firm conclusions. Similar findings were observed in a 2019 review on this topic.
The World Health Organization published a review and meta-analysis in 2022 of observational studies (considered lower quality evidence compared to randomised controlled trials) on this topic.
They looked at omega-6 intake and risk of death, cardiovascular disease, breast cancer, mental health conditions and type 2 diabetes. The findings show both advantages and disadvantages of consuming omega-6.
The findings reported that, overall, higher intakes of omega-6 were associated with a 9% reduced risk of dying (data from nine studies) but a 31% increased risk of postmenopausal breast cancer (data from six studies).
One of the key findings from this review was about the ratio of omega-3 fatty acids to omega-6 fatty acids. A higher omega 6:3 ratio was associated with a greater risk of cognitive decline and ulcerative colitis (an inflammatory bowel condition).
A higher omega 3:6 ratio was linked to a 26% reduced risk of depression. These mixed outcomes may be a cause of confusion among health-conscious consumers about the health impact of seed oils.
Overall, the evidence suggests that a high intake of omega-6 fatty acids from seed oils is unlikely to increase your risk of death and disease.
However, more high-quality intervention research is needed.
The importance of increasing your omega-3 fatty acids
On top of the mixed outcomes, there is clear evidence increasing the intake of omega-3 fatty acids (often found in foods such as fatty fish and walnuts) is beneficial for health.
While some seed oils contain small amounts of omega-3s, they are not typically considered rich sources.
Flaxseed oil is an exception and is one of the few seed oils that is notably high in alpha-linolenic acid (sometimes shortened to ALA), an omega-3 fatty acid.
If you are looking to increase your omega-3 intake, it’s better to focus on other sources such as fatty fish (salmon, mackerel, sardines), chia seeds, hemp seeds, walnuts, and algae-based supplements. These foods are known for their higher omega-3 content compared to seed oils.
The bottom line
At the end of the day, it’s probably OK to include small quantities of seed oils in your diet, as long as you are mostly focused on eating fresh, unprocessed foods.
The best way to reduce your risk of inflammation, heart disease, cancer or diabetes is not to focus so much on seed oils but rather on doing your best to follow the Australian Guide for Healthy Eating. 
Lauren Ball, Professor of Community Health and Wellbeing, The University of Queensland and Emily Burch, Lecturer, Southern Cross University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Lost Art of Silence – by Sarah Anderson
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From “A Room Of One’s Own” to “Silent Mondays”, from spiritual retreats to noise-cancelling headphones, this book covers the many benefits of silence—and a couple of downsides too.
In an age where most things are available at the touch of a button, a little peaceful solitude can come at quite a premium, but what it offers can effect all manner of physical changes, from reduced stress responses to increased neurogenesis (growing new brain cells).
The tone throughout is a combination of personal and pop-science, and it’s very motivating to find a little more space-between-the-things in life.
The book is best enjoyed in a quiet room.
Bottom line: if you get the feeling sometimes that you could rest and recover fully and properly if you could just find the downtime, this book will help you find exactly that.
Click here to check out the Lost Art of Silence, and find peace and strength in it!
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Saunas: Health Benefits (& Caveats)
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The Heat Is On
In Tuesday’s newsletter, we asked you your (health-related) opinion on saunas, and got the above-depicted, below-described, set of responses:
- About 53% said it is “a healthful activity with many benefits”
- About 25% said it is “best avoided; I feel like I’m dying in there”
- About 12% said “it feels good and therefore can’t be all bad”
So what does the science say?
The heat of saunas carries a health risk: True or False?
False, generally speaking, for any practical purposes. Of course, anything in life comes with a health risk, but statistically speaking, your shower at home is a lot more dangerous than a sauna (risk of slipping with no help at hand).
It took a bit of effort to find a paper on the health risks of saunas, because all the papers on PubMed etc coming up for those keywords were initially papers with “reduces the risk of…”, i.e. ways in which the sauna is healthy.
However, we did find one:
❝Contraindications to sauna bathing include unstable angina pectoris, recent myocardial infarction, and severe aortic stenosis.
Sauna bathing is safe, however, for most people with coronary heart disease with stable angina pectoris or old myocardial infarction.
Very few acute myocardial infarctions and sudden deaths occur in saunas, but alcohol consumption during sauna bathing increases the risk of hypotension, arrhythmia, and sudden death, and should be avoided. ❞
~ Dr. Matti Hannuksela & Dr. Samer Ellahham
Source: Benefits and risks of sauna bathing
So, very safe for most people, safe even for most people with heart disease, but there are exceptions so check with your own doctor of course.
And drinking alcohol anywhere is bad for the health, but in a sauna it’s a truly terrible idea. As an aside, please don’t drink alcohol in the shower, either (risk of slipping with no help at hand, and this time, broken glass too).
On the topic of it being safe for most people’s hearts, see also:
Beneficial effects of sauna bathing for heart failure patients
As an additional note, those who have a particular sensitivity to the heat, may (again please check with your own doctor, as your case may vary) actually benefit from moderate sauna use, to reduce the cardiovascular strain that your body experiences during heatwaves (remember, you can get out of a sauna more easily than you can get out of a heatwave, so for many people it’s a lot easier to do moderation and improve thermoregulatory responses):
Sauna usage can bring many health benefits: True or False?
True! Again, at least for most people. As well as the above-discussed items, here’s one for mortality rates in healthy Finnish men:
Not only that, also…
❝The Finnish saunas have the most consistent and robust evidence regarding health benefits and they have been shown to decrease the risk of health outcomes such as hypertension, cardiovascular disease, thromboembolism, dementia, and respiratory conditions; may improve the severity of musculoskeletal disorders, COVID-19, headache and flu, while also improving mental well-being, sleep, and longevity.
Finnish saunas may also augment the beneficial effects of other protective lifestyle factors such as physical activity.
The beneficial effects of passive heat therapies may be linked to their anti-inflammatory, cytoprotective and anti-oxidant properties and synergistic effects on neuroendocrine, circulatory, cardiovascular and immune function.
Passive heat therapies, notably Finnish saunas, are emerging as potentially powerful and holistic strategies to promoting health and extending the healthspan in all populations. ❞
~ Dr. Jari Laukkanen & Dr. Setor Kunutsor
(the repeated clarification of “Finnish sauna” is not a matter of fervent nationalism, by the way, but rather a matter of disambiguating it from Swedish sauna, which has some differences, most notably a lack of steam)
That reminds us: in Scandinavia, it is usual to use a sauna naked, and in Finland in particular, it is a common social activity amongst friends, coworkers, etc. In the US, many people are not so comfortable with nudity, and indeed, many places that provide saunas, may require the wearing of swimwear. But…
Just one problem: if you’re wearing swimwear because you’ve just been swimming in a pool, you now have chlorinated water soaked into your swimwear, which in the sauna, will become steam + chlorine gas. That’s not so good for your health (and is one reason, beyond tradition and simple normalization, for why swimwear is usually not permitted in Finnish saunas).
Want to read more?
You might like our previous main feature,
Turning Up The Heat Against Diabetes & Alzheimer’s ← you guessed it, sauna may be beneficial against these too
Take care!
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Gut-Positive Pot Noodles
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Everything we consume either improves our health a little or worsens it. Pot noodles aren’t generally the healthiest foods, but these ones sure are! There’s quite a range of fiber in this, including the soluble fiber of the noodles themselves (which are, in fact, mostly fiber and water). As a bonus, the glucomannan in the noodles promotes feelings of fullness, notwithstanding its negligible carb count. Of course, the protein in the edamame beans also counts for satiety!
You will need
- ½ cup konjac noodles (also called shirataki), tossed in 1 tsp avocado oil (or sesame oil, if you don’t have avocado)
- 2 oz mangetout, thinly sliced
- 1 oz edamame beans
- ¼ carrot, grated
- 2 baby sweetcorn, cut in half lengthways
- 1 scallion, finely diced
- 1 heaped tsp crunchy peanut butter (omit if allergic)
- 1 tsp miso paste
- 1 tsp chili oil
- 1 tsp black pepper, coarse ground
- 1 tsp peeled-and-grated ginger
Method
(we suggest you read everything at least once before doing anything)
1) Layer a heat-resistant jar (mason jars are usually quite resistant to temperature changes) with the noodles and vegetables.
2) Combine the peanut butter, miso paste, and chili oil, black pepper, and ginger in a small bowl. Pour this dressing over the layered vegetables and noodles, and screw the lid on. Refrigerate until needed.
3) Add hot water to the jar and stir, to serve. If you prefer the vegetables to be more cooked, you can microwave (without the lid!) for a minute or two.
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- Making Friends With Your Gut (You Can Thank Us Later)
- Why You’re Probably Not Getting Enough Fiber (And How To Fix It)
- 10 Ways To Balance Blood Sugars ← today’s recipe makes a perfect high-fiber, low-carb starter, per the hacks here
- Capsaicin For Weight Loss And Against Inflammation
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
- Ginger Does A Lot More Than You Think
Take care!
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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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5 ways to naturally boost the “Ozempic Effect”
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Dr. Jason Fung is perhaps most well-known for his work in functional medicine for reversing diabetes, and he’s once again giving us sound advice about metabolic hormone-hacking with dietary tweaks:
All about incretin
As you may gather from the thumbnail, this video is about incretin, a hormone group (the most well-known of which is GLP-1, as in GLP-1 agonists like semaglutide drugs such as Ozempic, Wegovy, etc) that slows down stomach emptying, which means a gentler blood sugar curve and feeling fuller for longer. It also acts on the hypothalmus, controlling appetite via the brain too (signalling fullness and reducing hunger).
Dr. Fung recommends 5 ways to increase incretin levels:
- Enjoy dietary fat: this increases incretin levels more than carbs
- Enjoy protein: again, prompts higher incretin levels of promotes satiety
- Enjoy fiber: this is more about slowing digestion, but when it’s fermented in the gut into short-chain fatty acids, those too increase incretin secretion
- Enjoy bitter foods: these don’t actually affect incretin levels, but they can bind to incretin receptors, making the body “believe” that you got more incretin (think of it like a skeleton key that fits the lock that was designed to be opened by a different key)
- Enjoy turmeric: for its curcumin content, which increases GLP-1 levels specifically
For more information on each of these, here’s Dr. Fung himself:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- Semaglutide for Weight Loss?
- Ozempic vs Five Natural Supplements
- How To Prevent And Reverse Type 2 Diabetes ← this was our “Expert Insights” feature on Dr. Fung’s work
Take care!
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Kidney Beans or Black Beans – Which is Healthier?
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Our Verdict
When comparing kidney beans to black beans, we picked the black beans.
Why?
First, do note that black beans are also known as turtle beans, or if one wants to hedge one’s bets, black turtle beans. It’s all the same bean. As a small linguistic note, kidney beans are known as “red beans” in many languages, so we could have called this “red beans vs black beans”, but that wouldn’t have landed so well with our largely anglophone readership. So, kidney beans vs black beans it is!
They’re certainly both great, and this is a close one today…
In terms of macros, they’re equal on protein and black beans have more carbs and/but also more fiber. So far, so equal—or rather, if one pulls ahead of the other here, it’s a matter of subjective priorities.
In the category of vitamins, they’re equal on vitamins B2, B3, and choline, while kidney beans have more of vitamins B6, B9, C, and K, and black beans have more of vitamins A, B1, B5, and E. In other words, the two beans are still tied with a 4:4 split, unless we want to take into account that that vitamin E difference is that black beans have 29x more vitamin E, in which case, black beans move ahead.
When it comes to minerals, finally the winner becomes apparent; while kidney beans have a little more manganese and zinc, on the other hand black beans have more calcium, copper, iron, magnesium, phosphorus, potassium, and selenium. However, it should be noted that honestly, the margins aren’t huge here and kidney beans are almost as good for all of these minerals.
In short, black beans win the day, but kidney beans are very close behind, so enjoy whichever you prefer, or better yet, both! They go great together in tacos, burritos, or similar, by the way.
Want to learn more?
You might like to read:
- Kidney Beans vs Fava Beans – Which is Healthier?
- Chickpeas vs Black Beans – Which is Healthier?
- Bold Beans – by Amelia Christie-Miller ← this is a recipe book; if you’re looking to incorporate more beans into your diet and want to make it good, this cookbook can lead the way!
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
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