Can kimchi really help you lose weight? Hold your pickle. The evidence isn’t looking great
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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.
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HRT Side Effects & Troubleshooting
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This is Dr. Heather Hirsch. She’s a board-certified internist, and her clinical expertise focuses on women’s health, particularly in midlife and menopause, and its intersection with chronic diseases (ranging from things associated with sexual health, to things like osteoporosis and heart disease).
So, what does she want us to know?
HRT can be life-changingly positive, but it can be a shaky start
Hormone Replacement Therapy (HRT), and in this context she’s talking specifically about the most common kind, Menopausal Hormone Therapy (MHT), involves taking hormones that our body isn’t producing enough of.
If these are “bioidentical hormones” as used in most of the industrialized world and increasingly also in N. America, then this is by definition a supplement rather than a drug, for what it’s worth, whereas some non-bioidentical hormones (or hormone analogs, which by definition function similarly to hormones but aren’t the same thing) can function more like drugs.
We wrote a little about his previously:
Hormone Replacement Therapy: A Tale Of Two Approaches
For most people most of the time, bioidentical hormones are very much the best way to go, as they are not only more effective, but also have fewer side effects.
That said, even bioidentical hormones can have some undesired effects, so, how to deal with those?
Don’t worry; bleed happy
A reprise of (usually quite light) menstrual bleeding is the most common side effect of menopausal HRT.
This happens because estrogen affects* the uterus, leading to a build-up and shedding of the uterine lining.
*if you do not have a uterus, estrogen can effect uterine tissue. That’s not a typo—here we mean the verb “effect”, as in “cause to be”. It will not grow a new uterus, but it can cause some clumps of uterine tissue to appear; this means that it becomes possible to get endometriosis without having a uterus. This information should not be too shocking, as endometriosis is a matter of uterine tissue growing inconveniently, often in places where it shouldn’t, and sometimes quite far from the uterus (if present, or its usual location, if absent). However, the risk of this happening is far lower than if you actually have a uterus:
What you need to know about endometriosis
Back to “you have a uterus and it’s making you wish you didn’t”:
This bleeding should, however, be light. It’ll probably be oriented around a 28-day cycle even if you are taking your hormones at the same dose every day of the month, and the bleeding will probably taper off after about 6 months of this.
If the bleeding is heavier, all the time, or persists longer than 6 months, then speak to your gynecologist about it. Any of those three; it doesn’t have to be all three!
Bleeding outside of one’s normal cycle can be caused by anything from fibroids to cancer; statistically speaking it’s probably nothing too dire,but when your safety is in question, don’t bet on “probably”, and do get it checked out:
When A Period Is Very Late (i.e., Post-Menopause)
Dr. Hirsch recommends, as possible remedies to try (preferably under your gynecologist’s supervision):
- lowering your estrogen dose
- increasing your progesterone dose
- taking progesterone continuously instead of cyclically
And if you’re not taking progesterone, here’s why you might want to consider taking this important hormone that works with estrogen to do good things, and against estrogen to rein in some of estrogen’s less convenient things:
Progesterone Menopausal HRT: When, Why, And How To Benefit
(the above link contains, as well as textual information, an explanatory video from Dr. Hirsch herself)
Get the best of the breast
Calm your tits. Soothe your boobs. Destress your breasts. Hakuna your tatas. Undo the calamity beleaguering your mammaries.
Ok, more seriously…
Breast tenderness is another very common symptom when starting to take estrogen. It can worry a lot of people (à la “aagh, what is this and is it cancer!?”), but is usually nothing to worry about. But just to be sure, do also check out:
Keeping Abreast Of Your Cancer Risk: How To Triple Your Breast Cancer Survival Chances
Estrogen can cause feelings of breast fullness, soreness, nipple irritation, and sometimes lactation, but this later will be minimal—we’re talking a drop or two now and again, not anything that would feed a baby.
Basically, it happens when your body hasn’t been so accustomed to normal estrogen levels in a while, and suddenly wakes up with a jolt, saying to itself “Wait what are we doing puberty again now? I thought we did menopause? Are we pregnant? What’s going on? Ok, checking all systems!” and then may calm down not too long afterwards when it notes that everything is more or less as it should be already.
If this persists or is more than a minor inconvenience though, Dr. Hirsch recommends looking at the likely remedies of:
- Adjust estrogen (usually the cause)
- Adjust progesterone (less common)
- If it’s progesterone, changing the route of administration can ameliorate things
What if it’s not working? Is it just me?
Dr. Hirsch advises the most common reasons are simply:
- wrong formulation (e.g. animal-derived estrogen or hormone analog, instead of bioidentical)
- wrong dose (e.g. too low)
- wrong route of administration (e.g. oral vs transdermal; usually transdermal estradiol is most effective but many people do fine on oral; progesterone meanwhile is usually best as a pessary/suppository, but many people do fine on oral)
Writer’s example: in 2022 there was an estrogen shortage in my country, and while I had been on transdermal estradiol hemihydrate gel, I had to go onto oral estradiol valerate tablets for a few months, because that’s what was available. And the tablets simply did not work for me at all. I felt terrible and I have a good enough intuitive sense of my hormones to know when “something wrong is not right”, and a good enough knowledge of the pharmacology & physiology to know what’s probably happening (or not happening). And sure enough, when I got my blood test results, it was as though I’d been taking nothing. It was such a relief to get back on the gel once it became available again!
So, if something doesn’t seem to be working for you, speak up and get it fixed if at all possible.
See also: What You Should Have Been Told About Menopause Beforehand
Want to know more from Dr. Hirsch?
You might like this book of hers, which we haven’t reviewed yet, but present here for your interest:
Enjoy!
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You’re Not Forgetful: How To Remember Everything
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Elizabeth Filips, medical student busy learning a lot of information, explains how in today’s video:
Active processing
An important thing to keep in mind is that forgetting is an active process, not passive as once believed. It has its own neurotransmitters and pathways, and as such, to improve memory, it’s essential to understand and manage forgetting.
So, how does forgetting occur? Memories are stored with cues or tags, which help retrieve information. However, overloading cues with too much information can cause “transient forgetting”—that is to say, the information is still in there somewhere; you just don’t have the filing system required to retrieve the data. This is the kind of thing that you will try hard to remember at some point in the day when you need it, fail, and then wake up at 3am with an “Aha!” because your brain finally found what you were looking for. So, to avoid that, use unique and strong cues to help improve recall (mnemonics are good for this, as are conceptual anchors).
While memory does not appear to actually be finite, there is some practical truth in the “finite storage” model insofar as learning new information can overwrite previous knowledge, iff your brain mistakes it for an update rather than addition. So for that reason, it’s good to periodically go over old information—in psychology this is called rehearsal, which may conjure theatrical images, but it can be as simple as mentally repeating a phone number, a mnemonic, or visually remembering a route one used to take to go somewhere.
Self-perception affects memory performance. Negative beliefs about one’s memory can worsen performance (so don’t say “I have a bad memory”, even to yourself, and in contrast, find more positive affirmations to make about your memory), and mental health in general plays a significant role in memory. For example, if you have ever had an extended period of depression, then chances are good you have some huge gaps in your memory for that time in your life.
A lot of what we learned in school was wrong—especially what we learned about learning. Traditional (vertical) learning is harder to retain, whereas horizontal learning (connecting topics through shared characteristics) creates stronger, interconnected memories. In short, your memories should tell contextual stories, not be isolated points of data.
Embarking on a new course of study? Yes? (If not, then why not? Pick something!)
It may be difficult at first, but experts memorize things more quickly due to built-up intuition in their field. For example a chess master can glance at a chess board for about 5 seconds and memorize the position—but only if the position is one that could reasonably arise in a game; if the pieces are just placed at random, then their memorization ability plummets to that of the average person, because their expertise has been nullified.
What this means in practical terms: building a “skeleton” framework before learning can enhance memorization through logical connections. For this reason, if embarking on a serious course of study, getting a good initial overview when you start is critical, so that you have a context for the rest of what you learn to go into. For example, let’s say you want to learn a language; if you first quickly do a very basic bare-bones course, such as from Duolingo or similar, then even though you’ll have a very small vocabulary and a modest grasp of grammar and make many mistakes and have a lot of holes in your knowledge, you now have somewhere to “fit” every new word or idea you learn. Same goes for other fields of study; for example, a doctor can be told about a new drug and remember everything about it immediately, because they understand the systems it interacts with, understand how it does what it does, and can compare it mentally to similar drugs, and they thus have a “place” in that overall system for the drug information to reside. But for someone who knows nothing about medicine, it’s just a lot of big words with no meaning. So: framework first, details later.
For more on all this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
How To Boost Your Memory Immediately (Without Supplements)
Take care!
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Finish What You Start – by Peter Hollins
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For some people, getting started is the problem. For others of us, getting started is the easy part! We just need a little help not dropping things we started.
There are summaries at the starts and ends of sections, and many “quick tips” to get you back on track.
As a taster: one of these is “temptation bundling“, combining unpleasant things with pleasant. A kind of “spoonful of sugar” approach.
Hollins also discusses hyperbolic discounting (the way we tend to value rewards according to how near they are, and procrastinate accordingly). He offers a tool to overcome this, too, the “10–10–10 rule“.
Also dealt with is “the preparation trap“, and how to know when you have enough information to press on.
For a lot of us, the places we’re most likely to drop a project is 20% in (initial enthusiasm wore off) or 80% in (“it’s nearly done; no need to worry about it”). Those are the times when the advices in this book can be particularly handy!
All in all, a great book for seeing a lot of things to completion.
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5 Surprising Benefits Of Exercise After 50 (More Than Just Fitness)
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It’s easy to want to do less as we get older, but the benefits of continuing to actively exercise, pushing oneself even just a little, can be far-reaching.
Direct and indirect benefits
As well as the obvious fitness benefits, keeping up good levels of exercise can also offer:
Healthy Skin
Exercise improves circulation, bringing growth factors (thus: regeneration, because it’s replacing cells), oxygen, and nutrients to the skin. Accordingly, it can lead to healthier, more youthful-looking skin as a low-cost alternative to a lot of skincare products. That said, it also encourages good skin habits, like daily sunscreen use.
Bone Health
Weight-bearing and resistance exercises (which between them, encompasses most forms of exercise) improve bone density. This is because physical stress signals bones to strengthen, reducing the risk of fractures. This includes activities like walking, hiking, and using resistance bands or weights. Note however that it is on a “per bone” basis. So for example, hiking will improve your lower body and spine, but do nothing for your arms. On the other hand, doing a daily groceries trip on foot, if local geography makes that practicable, can do the whole body, if one is then carrying groceries home (this writer lives about 2 miles from where she buys groceries, and does this pretty much daily).
Mental Health
Exercise, especially outdoors, has well-established positive effects on mental well-being, and can relieve stress and improve mood. As a bonus, community engagement and shared experiences can enhance mental health benefits for many people—but if you prefer it as peaceful time for yourself, that’s beneficial in its own way too!
Better Sleep
Physical activity helps promote better sleep quality, which is important for so many aspects of health—because fatiguing the body through exercise can lead to a more restful night, which is often harder to achieve with age.
Visibility and Confidence
Staying active and taking on challenges (e.g. training for some event) can boost visibility in social and family settings, countering “invisibility” often felt from midlife onwards. And even if one doesn’t do those things, exercise fosters confidence and helps people carry themselves with more self-assurance, which has a lot of knock-on benefits too.
For more on all of these things, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Are There Any Sensible Age Limits To Exercise?
Take care!
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10 Oft-Ignored Symptoms Of Diabetes
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Due in part to its prevalence and manageability, diabetes is often viewed as more of an inconvenience than an existential threat. While very few people in countries with decent healthcare die of diabetes directly (such as by diabetic ketoacidosis, which is very unpleasant, and happens disproportionately in the US where insulin is sold with a 500%–3000% markup in price compared to other countries), many more die of complications arising from comorbidities, and as for what comorbidities come with diabetes, well, it increases your risk for almost everything.
So, while for most people diabetes is by no means a death sentence, it is something that means you’ll now have to watch out for pretty much everything else too. On which note, Dr. Siobhan Deshauer is here with things to be aware of:
More than your waistline
Some of these are early symptoms (even appearing in the prediabetic stage, so can be considered an early warning for diabetes), some are later risks (it’s unlikely you’ll lose your feet from diabetic neuropathy complications before noticing that you are diabetic), but all and any of them are good reason to speak with your doctor sooner rather than later:
- Polyuria: waking up multiple times at night to urinate due to excess glucose spilling into the urine.
- Increased thirst: dehydration from frequent urination leads to excessive thirst, creating a cycle.
- Acanthosis nigricans: dark, velvety patches on areas like the neck, armpits, or groin, signalling insulin resistance.
- Skin tags: multiple skin tags in areas of friction may indicate insulin resistance.
- Recurrent Infections: high blood sugar weakens the immune system, making skin infections, UTIs, and yeast infections more common.
- Diabetic stiff hand syndrome: stiffness in hands, limited movement, or a “positive prayer sign” caused by sugar binding to skin and tendon proteins.
- Frozen shoulder and trigger finger: pain and limited movement in the shoulder or fingers, with a snapping sensation when moving inflamed tendons.
- Neuropathy: numbness, tingling, or pain in hands and feet due to nerve and blood vessel damage, often leading to foot deformities like Charcot foot.
- Diabetic foot infections: poor sensation, weakened immune response, and slow healing can result in severe infections and potential amputations.
- Gastroparesis: damage to stomach nerves causes delayed digestion, leading to bloating, nausea, and erratic blood sugar levels.
For more on all of these, plus some visuals of the things like what exactly is a “positive prayer sign”, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Cost of Insulin by Country 2024 ← after the US, the next most expensive country is Chile, at around 1/5 of the price; the cheapest listed is Turkey, at around 1/33 of the price.
Take care!
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Optimal Black Pepper Dosage and Supplement
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It’s Q&A Day at 10almonds!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I may have missed it, but how much black pepper provides benefits?❞
So, for any new subscribers joining us today, this is about two recent main features:
As for a daily dosage of black pepper, it varies depending on the benefit you’re looking for, but:
- 5–20mg of piperine is the dosage range used in most scientific studies we looked at
- 10mg is a very common dosage found in many popular supplements
- That’s the mass of piperine though, so if taking it as actual black pepper rather than as an extract, ½ teaspoon is considered sufficient to enjoy benefits.
❝I loved the health benefits of pepper. I do not like pepper. Where can I get it as a supplement?❞
You can simply buy whole black peppercorns and take a few with water as though they were tablets. Your stomach acid will do the rest. Black pepper is also good for digestion, so taking it with a meal is best.
You can buy piperine (black pepper extract) by itself as a supplement in powder form, but if you don’t like black pepper, you will probably not like this powder either. We couldn’t find it readily in capsule form.
You can buy piperine (black pepper extract) as an adjunct to other supplements, with perhaps the most common/popular being turmeric capsules that also contain 10mg (or more) piperine per capsule. Shop around if you like, but here’s one that has 15mg piperine* per capsule, for example.
*They call it “Bioperine®” but that is literally just piperine. Same go
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