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.
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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Chicken or Fish – Which is Healthier?
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Our Verdict
When comparing chicken to fish, we picked the fish.
Why?
To understand the choice, we have to start a bit earlier on the decision tree. For most people most of the time, when it comes to a diet high in plants or high in animals, the plant-centric diet will generally be best:
Do We Need Animal Products To Be Healthy?
When it comes to animal meats, red meat is a fairly uncontroversial first thing to strike off the list:
…with pork and some other meats not being much better.
But chicken? Poultry in general appears to be quite health-neutral. The jury is out and the science has mixed results, but the data is leaning towards “it’s probably fine”.
See for example this huge (n=29,682) study:
this same paper shows that…
❝higher intake of processed meat, unprocessed red meat, or poultry, but not fish, was significantly associated with a small increased risk of incident CVD, whereas higher intake of processed meat or unprocessed red meat, but not poultry or fish, was significantly associated with a small increased risk of all-cause mortality❞
So, since poultry isn’t significantly increasing all-cause mortality, and fish isn’t significantly increasing all-cause mortality or cardiovascular disease, fish comes out as the hands-down (fins-down?) winner.
One more (this time, easy) choice to make, though!
While fish in general (please, not fried, though!) is generally considered quite healthy, there is a big difference (more than you might think, and for reasons that are quite alarming), between…
Health Risks & Nutrition: Farmed Fish vs Wild-Caught
Enjoy, and take care!
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Capsaicin For Weight Loss And Against Inflammation
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Capsaicin’s Hot Benefits
Capsaicin, the compound in hot peppers that makes them spicy, is a chemical irritant and a neurotoxin. However, humans being humans, we decided to eat them for fun.
In contrast to many other ways in which humans recreationally enjoy things that are objectively poisonous, consuming capsaicin (in moderation) is considered to have health benefits, such as aiding weight loss (by boosting metabolism) and reducing inflammation.
Let’s see what the science says…
First: is it safe?
Capsaicin is classified as “Generally Recognized As Safe”. That said, the same mechanism that causes them to boost metabolism, does increase blood pressure:
Mechanisms underlying the hypertensive response induced by capsaicin
If you are in good cardiovascular health, this increase should be slight and not pose any threat, unless for example you enter a chili-eating contest when not acclimated to such:
Capsaicin and arterial hypertensive crisis
As ever, if unsure, do check with your doctor first, especially if you are taking any blood pressure medications, or otherwise have known blood pressure issues.
Does it really boost metabolism?
It certainly does; it works by increasing oxygen consumption and raising body temperature, both of which mean more calories will be burned for the same amount of work:
Dietary capsaicin and its anti-obesity potency: from mechanism to clinical implications
This means, of course, that chili peppers enjoy the status of being functionally a “negative calorie” food, and a top-tier one at that:
Chili pepper as a body weight-loss food
Here’s a good quality study that showed a statistically significant* fat loss improvement over placebo:
*To put it in numbers, the benefit was:
- 5.91 percentage points lower body fat percentage than placebo
- 6.68 percentage points greater change in body fat mass than placebo
See also: Difference between percentages and percentage points
For those who prefer big reviews than single studies, we’ve got you covered:
Does it really reduce inflammation?
Counterintuitive as it may seem, yes. By means of reducing oxidative stress. Given that things that reduce oxidative stress tend to reduce inflammation, and in turn tend to reduce assorted disease risks (from diabetes to cancer to Alzheimer’s), this probably has more knock-on benefits too, but we don’t have room to explore all of those today.
Fresh peppers are best for this, but dried peppers (such as when purchased as a ground spice in the supermarket, or when purchased as a capsule-based supplement) still have a very respectable anti-inflammatory effect:
- Capsaicinoids, Polyphenols and Antioxidant Activities of Capsicum annuum: Comparative Study of the Effect of Ripening Stage and Cooking Methods
- A Review on the Effect of Drying on Antioxidant Potential of Fruits and Vegetables
How much should we take?
It’s recommended to start at a low dose and gradually increase it, but 2–6mg of capsaicin per day is the standard range used in studies.
If you’re getting this from peppers, then for example cayenne pepper (a good source of capsaicin) contains around 2.5mg of capsaicin per 1 gram of cayenne.
In the case of capsules, if for example you don’t like eating hot pepper, this will usually mean taking 2–6 capsules per day, depending on dosage.
Make sure to take it with plenty of water!
Where can we get it?
Fresh peppers or ground spice from your local grocery store is fine. Your local health food store probably sells the supplements, too.
If you’d like to buy it online, here is an example product on Amazon.
Note: options on Amazon were more limited than usual, so this product is not vegan, and probably not halal or kosher, as the capsule contains an unspecified gelatin.
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Can We Drink To Good Health?
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Can we drink to good health?
We asked you for your thoughts on alcohol and heart health, and we got quite an even spread of results!
If perchance that’s too tiny to read, the figures were:
- 32% voted for “Alcohol is a relaxant, reduces stress, and can contain resveratrol too. It’s good for the heart!”
- 32% voted for: “Moderate alcohol consumption can be at least neutral for the health, if not positive ⚖️”
- 36% voted for: “Alcohol is bad for pretty much everything, including heart health ✋”
One subscriber who voted for “Alcohol is a relaxant, reduces stress, and can contain resveratrol too. It’s good for the heart!” added the following thoughts:
❝While it isn’t necessary to consume alcohol, moderate amounts can be beneficial and contribute to well-being through social activity, celebrations, etc.❞
That’s an interesting point, and definitely many people do see alcohol that way! Of course, that does not mean that one will find no social activities, celebrations, etc, in parts of the world where alcohol consumption is uncommon. Indeed, in India, wedding parties where no alcohol is consumed can go on for days!
But, “we live in a society” and all that, and while we’re a health newsletter not a social issues newsletter, it’d be remiss of us to not acknowledge the importance of socialization for good mental health—and thus the rest of our health too.
So, if indeed all our friends and family drink alcohol, it can certainly make abstaining more of a challenge.
On that note, let’s take a moment to consider “The French Paradox” (an observation of a low prevalence of ischemic heart disease despite high intakes of saturated fat, a phenomenon accredited to the consumption of red wine).
As it happens, a comprehensive review in “Circulation”, a cardiovascular health journal, has suggested the French Paradox may not be so paradoxical after all.
Research suggests it has more to do with other lifestyle factors (and historic under-reporting of cardiovascular disease by French doctors), which would explain why Japan has lower rates of heart disease, despite drinking little wine, and more beer and spirits.
So, our subscriber’s note may not be completely without reason! It’s just about the party, not the alcohol.
One subscriber who voted for “Moderate alcohol consumption can be at least neutral for the health, if not positive ⚖️” wrote:
❝Keeping in mind, moderate means one glass of wine for women a day and two for men. Hard alcohol doesn’t have the same heart benefits as wine❞
That is indeed the guideline according to some health bodies!
In other places with different guiding advisory bodies, that’s been dropped down to one a day for everyone (the science may be universal, but how government institutions interpret that is not).
About that wine… Specifically, red wine, for its resveratrol content:
While there are polyphenols such as resveratrol in red wine that could boost heart health, there’s so little per glass that you may need 100–1000 glasses to get the dosage that provides benefits in mouse studies. If you’re not a mouse, you might even need more.
To this end, many people prefer resveratrol supplementation. ← link is to an example product, but there are plenty more so feel free to shop around
A subscriber who voted for “Alcohol is bad for pretty much everything, including heart health ✋” says:
❝New guidelines suggest 1 to 2 drinks a week are okay but the less the better.❞
If you haven’t heard these new guidelines, we’ll mention again: every government has its own official bodies and guidelines so perhaps your local guidelines differ, but for example here’s what that World Health Organization has to say (as of January this year):
WHO: No level of alcohol consumption is safe for our health
So, whom to believe? The governments who hopefully consider the welfare of their citizenry more important than the tax dollars from alcohol sales, or the World Health Organization?
It’s a tough one, but we’ll always err on the side of the science.
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Syringe Exchange Fears Hobble Fight Against West Virginia HIV Outbreak
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CHARLESTON, http://w.va/. — More than three years have passed since federal health officials arrived in central Appalachia to assess an alarming outbreak of HIV spread mostly between people who inject opioids or methamphetamine.
Infectious disease experts from the Centers for Disease Control and Prevention made a list of recommendations following their visit, including one to launch syringe service programs to stop the spread at its source. But those who’ve spent years striving to protect people who use drugs from overdose and illness say the situation likely hasn’t improved, in part because of politicians who contend that such programs encourage illegal drug use.
Joe Solomon is a Charleston City Council member and co-director of SOAR WV, a group that works to address the health needs of people who use drugs. He’s proud of how his close-knit community has risen to this challenge but frustrated with the restraints on its efforts.
“You see a city and a county willing to get to work at a scale that’s bigger than ever before,” Solomon said, “but we still have one hand tied behind our back.”
The hand he references is easier access to clean syringes.
In April 2021, the CDC came to Charleston — the seat of Kanawha County and the state capital, tucked into the confluence of the Kanawha and Elk rivers — to investigate dozens of newly detected HIV infections. The CDC’s HIV intervention chief called it “the most concerning HIV outbreak in the United States” and warned that the number of reported diagnoses could be just “the tip of the iceberg.”
Now, despite attention and resources directed toward the outbreak, researchers and health workers say HIV continues to spread. In large part, they say, the outbreak lingers because of restrictions state and local policymakers have placed on syringe exchange efforts.
Research indicates that syringe service programs are associated with an estimated 50% reduction in HIV and hepatitis C, and the CDC issued recommendations to steer a response to the outbreak that emphasized the need for improved access to those services.
That advice has thus far gone unheeded by local officials.
In late 2015, the Kanawha-Charleston Health Department launched a syringe service program but shuttered it in 2018 under pressure, with then-Mayor Danny Jones calling it a “mini-mall for junkies and drug dealers.”
SOAR stepped in, hosting health fairs at which it distributed naloxone, an opioid overdose reversal drug; offered treatment and referrals; provided HIV testing; and exchanged clean syringes for used ones.
But in April 2021, the state legislature passed a bill limiting the number of syringes people could exchange and made it mandatory to present a West Virginia ID. The Charleston City Council subsequently added guidelines of its own, including requiring individual labeling of syringes.
As a result of these restrictions, SOAR ceased exchanging syringes. West Virginia Health Right now operates an exchange program in the city under the restrictions.
Robin Pollini is a West Virginia University epidemiologist who conducts community-based research on injection drug use. “Anyone I’ve talked to who’s used that program only used it once,” she said. “And the numbers they report to the state bear that out.”
A syringe exchange run by the health department in nearby Cabell County — home to Huntington, the state’s largest city after Charleston — isn’t so constrained. As Solomon notes, that program exchanges more than 200 syringes for every one exchanged in Kanawha.
A common complaint about syringe programs is that they result in discarded syringes in public spaces. Jan Rader, director of Huntington’s Mayor’s Office of Public Health and Drug Control Policy, is regularly out on the streets and said she seldom encounters discarded syringes, pointing out that it’s necessary to exchange a used syringe for a new one.
In August 2023, the Charleston City Council voted down a proposal from the Women’s Health Center of West Virginia to operate a syringe exchange in the city’s West Side community, with opponents expressing fears of an increase in drug use and crime.
Pollini said it’s difficult to estimate the number of people in West Virginia with HIV because there’s no coordinated strategy for testing; all efforts are localized.
“You would think that in a state that had the worst HIV outbreak in the country,” she said, “by this time we would have a statewide testing strategy.”
In addition to the testing SOAR conducted in 2021 at its health fairs, there was extensive testing during the CDC’s investigation. Since then, the reported number of HIV cases in Kanawha County has dropped, Pollini said, but it’s difficult to know if that’s the result of getting the problem under control or the result of limited testing in high-risk groups.
“My inclination is the latter,” she said, “because never in history has there been an outbreak of injection-related HIV among people who use drugs that was solved without expanding syringe services programs.”
“If you go out and look for infections,” Pollini said, “you will find them.”
Solomon and Pollini praised the ongoing outreach efforts — through riverside encampments, in abandoned houses, down county roads — of the Ryan White HIV/AIDS Program to test those at highest risk: people known to be injecting drugs.
“It’s miracle-level work,” Solomon said.
But Christine Teague, Ryan White Program director at the Charleston Area Medical Center, acknowledged it hasn’t been enough. In addition to HIV, her concerns include the high incidence of hepatitis C and endocarditis, a life-threatening inflammation of the lining of the heart’s chambers and valves, and the cost of hospital resources needed to address them.
“We’ve presented that data to the legislature,” she said, “that it’s not just HIV, it’s all these other lengthy hospital admissions that, essentially, Medicaid is paying for. And nothing seems to penetrate.”
Frank Annie is a researcher at CAMC specializing in cardiovascular diseases, a member of the Charleston City Council, and a proponent of syringe service programs. Research he co-authored found 462 cases of endocarditis in southern West Virginia associated with injection drug use, at a cost to federal, state, and private insurers of more than $17 million, of which less than $4 million was recovered.
Teague is further concerned for West Virginia’s rural counties, most of which don’t have a syringe service program.
Tasha Withrow, a harm reduction advocate in bordering rural Putnam County, said her sense is that HIV numbers aren’t alarmingly high there but said that, with little testing and heightened stigma in a rural community, it’s difficult to know.
In a January 2022 follow-up report, the CDC recommended increasing access to harm reduction services such as syringe service programs through expansion of mobile services, street outreach, and telehealth, using “patient-trusted” individuals, to improve the delivery of essential services to people who use drugs.
Teague would like every rural county to have a mobile unit, like the one operated by her organization, offering harm reduction supplies, medication, behavioral health care, counseling, referrals, and more. That’s an expensive undertaking. She suggested opioid settlement money through the West Virginia First Foundation could pay for it.
Pollini said she hopes state and local officials allow the experts to do their jobs.
“I would like to see them allow us to follow the science and operate these programs the way they’re supposed to be run, and in a broader geography,” she said. “Which means that it shouldn’t be a political decision; it should be a public health decision.”
KFF Health News is a national newsroom that produces in-depth journalism about health issues and is one of the core operating programs at KFF—an independent source of health policy research, polling, and journalism. Learn more about KFF.
Subscribe to KFF Health News’ free Morning Briefing.
This article first appeared on KFF Health News and is republished here under a Creative Commons license.
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How Ibogaine Can Beat Buprenorphine For Beating Addictions
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
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
❝Questions?❞
It seems that this week, everyone was so satisfied with our information, that we received no questions! (If you sent one and we somehow missed it, please accept our apologies and do bring our attention to it)
However, we did receive some expert feedback that we wanted to share because it’s so informative:
❝I work at a detox rehab in Mexico, where we can use methods not legal in the United States. Therefore, while much of the linked articles had useful information, I’m in the “trenches” every day, and there’s some information I’d like to share that you may wish to share, with additional information:
- Buprenorphine is widely used and ineffective for addiction because it’s synthetic and has many adverse side effects. For heavy drug users it isn’t enough and they still hit the streets for more opioid, resulting in fentanyl deaths. Depending on length of usage and dose, it can take WEEKS to get off of, and it’s extremely difficult.
- Ibogaine is the medicine we use to detox people off opiates, alcohol, meth as well as my own specialty, bulimia. It’s psychoactive and it temporarily “resets” the brain to a pre-addictive state. Supplemented by behavior and lifestyle changes, as well as addressing the traumas that led to the addiction is extremely effective.
Our results are about 50%, meaning the client is free of the substance or behavior 1 year later. Ibogaine isn’t a “magic pill” or cure, it’s an opening tool that makes the difficult work of reclaiming one’s life easier.
Ibogaine is not something that should be done outside a medical setting. It requires an EKG to ensure the heart is healthy and doesn’t have prolonged QT intervals; also blood testing to ensure organs are functioning (especially the liver) and mineral levels such as magnetic and potassium are where they should be. It is important that this treatment be conducted by experienced doctors or practitioners, and monitoring vital signs constantly is imperative.
I’m taking time to compose this information because it needs to be shared that there is an option available most people have not heard about.❞
~ 10almonds reader (slightly edited for formatting and privacy)
Thank you for that! Definitely valuable information for people to know, and (if applicable for oneself or perhaps a loved one) ask about when it comes to local options.
We see it’s also being studied for its potential against other neurological conditions, too:
❝The combination of ibogaine and antidepressants produces a synergistic effect in reducing symptoms of psychiatric disorders such as bipolar disorder, depression, schizophrenia, paranoia, anxiety, panic disorder, mania, post-traumatic stress disorder (PTSD), and obsessive–compulsive disorder. Though ibogaine and the antidepressant act in different pathways, together they provide highly efficient therapeutic responses compared to when each of the active agents is used alone.❞
Read more: Ibogaine and Their Analogs as Therapeutics for Neurological and Psychiatric Disorders
For those who missed it, today’s information about ibogaine was in response to our article:
Let’s Get Letting Go (Of These Three Things)
…which in turn referenced our previous main feature:
Which Addiction-Quitting Methods Work Best?
Take care!
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Hardwiring Happiness – by Dr. Rick Hanson
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Publishers are very excitable about “the new science of…”, and it’s almost never actually a new science of. But what about in this case?
No, it isn’t. It’s the very well established science of! And that’s a good thing, because it means this book is able to draw on quite a lot of research and established understanding of how neuroplasticity works, to leverage that and provide useful guidance.
A particular strength of this book is that while it polarizes the idea that some people have “happy amygdalae” and some people have “sad amygdalae”, it acknowledges that it’s not just a fated disposition and is rather the result of the lives people have led… And then provides advice on upgrading from sad to happy, based on the assumption that the reader is quite possibly coming from a non-ideal starting point.
The bookdoes an excellent job of straddling neuroscience and psychology, which sounds like not much of a straddle (the two are surely very connected, after all, right?) but this does mean that we’re hearing about the chemical structure of DNA inside the nuclei of the neurons of the insula, not long after reading an extended gardening metaphor about growth, choices, and vulnerabilities.
Bottom line: if you’d like a guide to changing your brain for the better (happier) that’s not just “ask yourself: what if it goes well?” and similar CBTisms, then this is a fine book for you.
Click here to check out Hardwiring Happiness, and indeed hardwire happiness!
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