Can kimchi really help you lose weight? Hold your pickle. The evidence isn’t looking great
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Fermented foods have become popular in recent years, partly due to their perceived health benefits.
For instance, there is some evidence eating or drinking fermented foods can improve blood glucose control in people with diabetes. They can lower blood lipid (fats) levels and blood pressure in people with diabetes or obesity. Fermented foods can also improve diarrhoea symptoms.
But can they help you lose weight, as a recent study suggests? Let’s look at the evidence.
Remind me, what are fermented foods?
Fermented foods are ones prepared when microbes (bacteria and/or yeast) ferment (or digest) food components to form new foods. Examples include yoghurt, cheese, kefir, kombucha, wine, beer, sauerkraut and kimchi.
As a result of fermentation, the food becomes acidic, extending its shelf life (food-spoilage microbes are less likely to grow under these conditions). This makes fermentation one of the earliest forms of food processing.
Fermentation also leads to new nutrients being made. Beneficial microbes (probiotics) digest nutrients and components in the food to produce new bioactive components (postbiotics). These postbiotics are thought to contribute to the health benefits of the fermented foods, alongside the health benefits of the bacteria themselves.
What does the evidence say?
A study published last week has provided some preliminary evidence eating kimchi – the popular Korean fermented food – is associated with a lower risk of obesity in some instances. But there were mixed results.
The South Korean study involved 115,726 men and women aged 40-69 who reported how much kimchi they’d eaten over the previous year. The study was funded by the World Institute of Kimchi, which specialises in researching the country’s national dish.
Eating one to three servings of any type of kimchi a day was associated with a lower risk of obesity in men.
Men who ate more than three serves a day of cabbage kimchi (baechu) were less likely to have obesity and abdominal obesity (excess fat deposits around their middle). And women who ate two to three serves a day of baechu were less likely to have obesity and abdominal obesity.
Eating more radish kimchi (kkakdugi) was associated with less abdominal obesity in both men and women.
However, people who ate five or more serves of any type of kimchi weighed more, had a larger waist sizes and were more likely to be obese.
The study had limitations. The authors acknowledged the questionnaire they used may make it difficult to say exactly how much kimchi people actually ate.
The study also relied on people to report past eating habits. This may make it hard for them to accurately recall what they ate.
This study design can also only tell us if something is linked (kimchi and obesity), not if one thing causes another (if kimchi causes weight loss). So it is important to look at experimental studies where researchers make changes to people’s diets then look at the results.
How about evidence from experimental trials?
There have been several experimental studies looking at how much weight people lose after eating various types of fermented foods. Other studies looked at markers or measures of appetite, but not weight loss.
One study showed the stomach of men who drank 1.4 litres of fermented milk during a meal took longer to empty (compared to those who drank the same quantity of whole milk). This is related to feeling fuller for longer, potentially having less appetite for more food.
Another study showed drinking 200 millilitres of kefir (a small glass) reduced participants’ appetite after the meal, but only when the meal contained quickly-digested foods likely to make blood glucose levels rise rapidly. This study did not measure changes in weight.
Ildi Papp/Shutterstock
Another study looked at Indonesian young women with obesity. Eating tempeh (a fermented soybean product) led to changes in an appetite hormone. But this did not impact their appetite or whether they felt full. Weight was not measured in this study.
A study in South Korea asked people to eat about 70g a day of chungkookjang (fermented soybean). There were improvements in some measures of obesity, including percentage body fat, lean body mass, waist-to-hip ratio and waist circumference in women. However there were no changes in weight for men or women.
A systematic review of all studies that looked at the impact of fermented foods on satiety (feeling full) showed no effect.
What should I do?
The evidence so far is very weak to support or recommend fermented foods for weight loss. These experimental studies have been short in length, and many did not report weight changes.
To date, most of the studies have used different fermented foods, so it is difficult to generalise across them all.
Nevertheless, fermented foods are still useful as part of a healthy, varied and balanced diet, particularly if you enjoy them. They are rich in healthy bacteria, and nutrients.
Are there downsides?
Some fermented foods, such as kimchi and sauerkraut, have added salt. The latest kimchi study said the average amount of kimchi South Koreans eat provides about 490mg of salt a day. For an Australian, this would represent about 50% of the suggested dietary target for optimal health.
Eating too much salt increases your risk of high blood pressure, heart disease and stroke. 
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.
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
Avocado vs Blueberries – Which is Healthier?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Our Verdict
When comparing avocado to blueberries, we picked the avocado.
Why?
These two fruits aren’t as similar as some of the comparisons we’ve made—we often go for “can be used in the same way culinarily” comparisons. But! They are both popularly in the “superfood” category, so it’s interesting to consider:
In terms of macros, avocado has more protein, (healthy!) fat, and fiber, while blueberries have more carbs. An easy win for avocado here, unless you’re on a calorie-controlled diet perhaps, since avocado is also higher in those. About that fat; it’s mostly monounsaturated, with some polyunsaturated and saturated, and is famously a good source of omega-3 in the form of ALA.
In the category of vitamins, avocado has more of vitamins A, B1, B2, B3, B5, B6, B7, B9, C, E, K, and choline, while blueberries are not higher in any vitamins. So, not a tricky decision here.
When it comes to minerals, avocado has more calcium, copper, iron, magnesium, phosphorus, potassium, selenium, and zinc, while blueberries are higher in manganese. Another win for avocados.
There is one other category that’s important to consider in this case, and that’s polyphenols. We’d be here all day if we listed them all, but in total, blueberries have about 1193x the polyphenol content that avocados do. Blueberries got the reputation for antioxidant properties for a reason; it is well-deserved!
So, out of the two, we declare avocado the overall more nutritious of the two, but blueberries absolutely deserve the acclaim they get also.
Want to learn more?
You might like to read:
Give Us This Day Our Daily Dozen
Take care!
Share This Post
-
Is ADHD Being Over-Diagnosed For Cash?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Is ADHD Being Systematically Overdiagnosed?
The BBC’s investigative “Panorama” program all so recently did a documentary in which one of their journalists—who does not have ADHD—went to three private clinics and got an ADHD diagnosis from each of them:
- The BBC documentary: Private ADHD Clinics Exposed (28 mins)
- Their “5 Minutes” version: ADHD Undercover: How I Was Misdiagnosed (6 mins)
So… Is it really a case of show up, pay up, and get a shiny new diagnosis?
The BBC Panorama producers cherry-picked 3 private providers, and during those clinical assessments, their journalist provided answers that would certainly lead to a diagnosis.
This was contrasted against a three-hour assessment with an NHS psychiatrist—something that rarely happens in the NHS. Which prompts the question…
How did he walk into a 3-hour psychiatrist assessment, when most people have to wait in long waiting lists for a much more cursory appointment first with assorted gatekeepers, before going on another long waiting list, for an also-much-shorter appointment with a psychiatrist?
That would be because the NHS psychiatrist was given advance notification that this was part of an investigation and would be filmed (the private clinics were not gifted the same transparency)
So, maybe just a tad unequal treatment!
In case you’re wondering, here’s what that very NHS psychiatrist had to say on the topic:
Is it really too easy to be diagnosed with ADHD?
(we’ll give you a hint—remember Betteridge’s Law!)
❝Since the documentary aired, I have heard from people concerned that GPs could now be more likely to question legitimate diagnoses.
But as an NHS psychiatrist it is clear to me that the root of this issue is not overdiagnosis.
Instead, we are facing the combined challenges of remedying decades of underdiagnosis and NHS services that were set up when there was little awareness of ADHD.❞
~ Dr. Mike Smith, Psychiatrist
The ADHD foundation, meanwhile, has issued its own response, saying:
❝We are disappointed that BBC Panorama has opted to broadcast a poorly researched, sensationalist piece of television journalism.❞
Share This Post
-
Fluoride Toothpaste vs Non-Fluoride Toothpaste – Which is Healthier?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Our Verdict
When comparing fluoride toothpaste to non-fluoride toothpaste, we picked the fluoride.
Why?
Fluoride is indeed toxic; that’s why it’s in toothpaste (to kill things; namely, bacteria whose waste products would harm our teeth). However, we are much bigger than those bacteria.
Given the amount of fluoride in toothpaste (usually under 1mg per strip of toothpaste to cover a toothbrush head), the amount that people swallow unintentionally (about 1/20th of that, so about 0.1mg daily if brushing teeth twice daily), and the toxicity level of fluoride (32–64mg/kg), then even if we take the most dangerous ends of all those numbers (and an average body size), to suffer ill effects from fluoride due to brushing your teeth, would require that you brush your teeth more than 23,000 times per day.
Alternatively, if you were to ravenously eat the toothpaste instead of spitting it out, you’d only need to brush your teeth a little over 1,000 times per day.
All the same, please don’t eat toothpaste; that’s not the message here.
However! In head-to-head tests, fluoride toothpaste has almost always beaten non-fluoride toothpaste.
Almost? Yes, almost: hydroxyapatite performed equally in one study, but that’s not usually an option on as many supermarket shelves.
We found some on Amazon, though, which is the one we used for today’s head-to-head. Here it is:
However, before you rush to buy it, do be aware that the toxicity of hydroxyapatite appears to be about twice that of fluoride:
Scientific Committee on Consumer Safety Opinion On Hydroxyapatite (Nano)
…which is still very safe (you’d need to brush your teeth, and eat all the toothpaste, about 500 times per day, to get to toxic levels, if we run with the same numbers we discussed before. Again, please do not do that, though).
But, since the science so far suggests it’s about twice as toxic as fluoride, then regardless of that still being very safe, the fluoride is obviously (by the same metric) twice as safe, hence picking the fluoride.
Want more options?
Check out our previous main feature:
Less Common Oral Hygiene Options
(the above article also links back to our discussion of different toothpastes and mouthwashes, by the way)
Take care!
Share This Post
Related Posts
-
An Accessible New Development Against Alzheimer’s
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
Dopamine vs Alzheimer’s
One of the key hallmarks of Alzheimer’s disease is the formation of hardened beta-amyloid plaques around neurons. The beta-amyloid peptides themselves are supposed to be in the brain, but the hardened pieces of them that form the plaques are not.
While the full nature of the relationship between those plaques and Alzheimer’s disease is not known for sure (there are likely other factors involved, and “the amyloid hypothesis” is at this stage nominally just that, a hypothesis), one thing that has been observed is that increasing or reducing the plaques increases or reduces (respectively) Alzheimer’s symptoms such as memory loss.
Neprilysin
There is an enzyme, neprilysin, that can break down those plaques.
Neprilysin is made naturally in the brain, and/but we cannot take it as a supplement or medication, because it’s too big to pass through the blood-brain barrier.
A team of researchers led by Dr. Takaomi Saido genetically manipulated mice to produce more neprilysin, and those mice resultantly experienced fewer beta-amyloid plaques and better memory in their old age.
However wonderful for the mice (and a great proof of principle) the above approach is not useful as a treatment for humans whose genomes weren’t modified at our conception in a lab.
Since (as mentioned before) we also can’t take it as a medication/supplement, that leaves one remaining option: find a way to make our already-existing brains produce more of it.
The team’s previous research allowed them to narrow this down to “there is probably a hormone made in the hypothalamus that modulates this”, so they began experimenting with making the mice produce more hormones there.
The DREADD switch
DREADDs, or Designer Receptors Exclusively Activated by Designer Drugs, were the next tool in the toolbox. The scientists attached these designer receptors to dopamine-producing neurons in the mice, so that they could be activated by the appropriate designer drugs—basically, allowing for a “make more dopamine” button, without having to literally wire up the brains with electrodes. The “button” gets triggered instead by a chemical trigger, the designer drug. You can read more about them here:
DREADDs for Neuroscientists: A Primer
The result was positive; when the mice made more dopamine, the result was that they also made more neprilysin. So far, the hypothesis is that the presence of dopamine upregulates the production of neprilysin. In other words, the increased neprilysin levels were caused by the increased dopamine levels (the alternatives would have been: they were both caused by the same thing—in this case that’d be the DREADD activation—or the increase was caused by something else entirely that hadn’t been controlled for).
As to how the causal relationship was determined…
“But I don’t have (or want) a DREADD switch in my head”
Happily for us (and probably happily for the mice too, because dopamine causes feelings of happiness), the experiments continued.
This time, instead of using the DREADD system, they tried simply supplementing the mouse food with l-dopa, a dopamine precursor. L-dopa is often used in the treatment of Parkinson’s disease, because the molecules are small enough to pass through the blood-brain barrier, and can be converted to full dopamine inside the brain itself. So, taking l-dopa normally raises dopamine levels.
The results? The mice who were given l-dopa enjoyed:
- higher dopamine levels
- higher neprilysin levels
- lower beta-amyloid plaque levels
- better memory in tests
The next step for the researchers is to investigate how exactly dopamine regulates neprilysin in the brain, but for now, the relationship between l-dopa consumption and the reduction of Alzheimer’s symptoms seems clear.
You can read about the study here:
The dopaminergic system promotes neprilysin-mediated degradation of amyloid-β in the brain
Is there a catch?
L-dopa has common side effects that are not pleasant; the list begins with nausea and vomiting, and continues with things that one might expect from having “too much of a good thing” when it comes to dopamine, such as dyskinesia (extra movements) and hallucinations.
You can read about it more here at the Parkinson’s Foundation:
Parkinson’s Foundation | Levodopa
However! All is not lost. Rather than reaching for the heavy guns by taking l-dopa unnecessarily, there are other dopamine precursors that don’t have those side effects (and are consequently less restricted, to the point they can be purchased as supplements, or indeed, enjoyed where they occur naturally in some foods).
Top of the list of such safe* and readily-available dopamine precursors is…
N-Acetyl L-Tyrosine (NALT): The Dopamine Precursor & More
If you’d like to try that, here’s an example product on Amazon… Or you could eat fish, white beans, tofu, natto, or pumpkin seeds 😉
*Quick note on safety: “safe” is a relative term and may vary from person to person. Please speak with your own doctor to be sure, check with your pharmacist in case of any meds interactions, and be especially careful taking anything that increases dopamine levels if you have bipolar disorder or are otherwise prone to psychosis of any kind. For most people, this shouldn’t be an issue as our brains have a built-in mechanism for scrubbing excess dopamine and ensuring we don’t end up with too much, but for some people whose dopamine regulation is not so good in that regard, it can cause problems. So again, speak with your doctor to be sure, because we are not doctors, let alone your doctor.
Lastly…
If you’d like an entirely drug-free approach, that’s skipping even the “nutraceuticals”, you might enjoy:
Short On Dopamine? Science Has The Answer
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
3 Health Things A Lot Of People Are Getting Wrong (Don’t Make These Mistakes)
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
It’s time for our weekly health news roundup, and this week we’re putting the spotlight on…
Don’t Dabble In dubious diabetes Drugs
Diabetes drugs are in hot demand, both for actual diabetics and also for people who want to lose weight and/or generally improve their metabolic health. However, there are a lot of claims out there for products that simply do not work and/or are outright fakes, as well as claims for supplements that are known to have a real hypoglycemic effect (such as berberine) but the supplements in question are not regulated, so it can be hard to control for quality, to ensure you are really getting what it says on the label.
As for the prescription drugs specifically (such as metformin, or GLP-1 RAs): there are online black market and gray market pharmacies who offer to sell you prescription drugs either…
- no questions asked (black market), or
- basic questions asked (e.g. “are you diabetic?”), and a doctor with flexible morals will rubber-stamp the prescription on the basis of your answers (gray market).
The problem with these is that once again they may be fakes and there is practically no accountability (these sorts of online pharmacies come and go as quickly as street vendors). Furthermore, even if they are real, self-medicating in this fashion without the requisite expert knowledge can result in messing up dosages, which can cause all sorts of issues, not least of all, death.
Read in full: The dangers of fraudulent diabetes products and how to avoid them
Related: Metformin For Weight-Loss & More
There is no “just the flu”
It’s easy, and very socially normal, to dismiss flu—which has killed millions—as “just the flu”.
However, flu deaths have surpassed COVID deaths all so recently this year (you are mindful that COVID is still out and killing people, yes? Governments declaring the crisis over doesn’t make the virus pack up and retire), and because it’s peaking a little late (it had seemed to be peaking just after new year, which would be normal, but it’s enjoying a second larger surge now), people are letting their guard down more.
Thus, getting the current flu vaccination is good, if available (we know it’s not fun, but neither is being hospitalized by flu), and either way, taking care of all the usual disease-avoidance and immune-boosting strategies (see our “related” link for those).
Read in full: Report indicates this flu season is the worst in a decade
Related: Why Some People Get Sick More (And How To Not Be One Of Them)
The hospital washbasins that give you extra bugs
First they came for the hand-dryer machines, and we did not speak up because those things are so noisy.
But more seriously: just like hand-dryer machines are now fairly well-known to incubate and spread germs at impressive rates, washbasins have come under scrutiny because the process goes:
- Person A has germs on their hands, and washes them (yay)
- The germs are now in the washbasin (soap causes them to slide off, but doesn’t usually kill them)
- Person B has germs on their hands, and washes them
- The splashback from the water hitting the washbasin distributes person A’s germs onto person B
- Not just their hands, which would be less of a problem (they are getting washed right now, after all), but also their face, because yes, even with flow restrictors, the splashback produces respirable-sized bioaerosols that travel far and easily
In other words: it’s not just the visible/tangible splashback you need to be aware of, but also, that which you can’t see or feel, too.
Read in full: Researchers warn about germ splashback from washbasins
Related: The Truth About Handwashing
Take care!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
-
100 Hikes of a Lifetime – by Kate Siber
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
This is published by National Geographic, so you can imagine the quality of the photos throughout.
Inside, and after a general introduction and guide to gear and packing appropriately, it’s divided into continents, with a diverse array of “trips of a lifetime” for anyone who enjoys hiking.
It’s not a narrative book, rather, it is a guide, a little in the style of “Lonely Planet”, with many “know before you go” tips, information about the best time to go, difficult level, alternative routes if you want to get most of the enjoyment while having an easier time of it (or, conversely, if you want to see some extra sights along the way), and what to expect at all points.
Where the book really excels is in balancing inspiration with information. There are some books that make you imagine being in a place, but you’ll never actually go there. There are other books that are technical manuals but not very encouraging. This one does both; it provides the motivation and the “yes, you really can, here’s how” information that, between them, can actually get you packing and on your way.
Bottom line: if you yearn for breathtaking views and time in the great outdoors, but aren’t sure where to start, this will give you an incredible menu to choose from, and give you the tools to go about doing it.
Click here to check out 100 Hikes Of A Lifetime, and live it!
Don’t Forget…
Did you arrive here from our newsletter? Don’t forget to return to the email to continue learning!
Learn to Age Gracefully
Join the 98k+ American women taking control of their health & aging with our 100% free (and fun!) daily emails:
