The Brain-Gut Highway: A Two-Way Street
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The Brain-Gut Two-Way Highway
This is Dr. Emeran Mayer. He has the rather niche dual specialty of being a gastroenterologist and a neurologist. He has published over 353 peer reviewed scientific articles, and he’s a professor in the Departments of Medicine, Physiology, and Psychiatry at UCLA. Much of his work has been pioneering medical research into gut-brain interactions.
We know the brain and gut are connected. What else does he want us to know?
First, that it is a two-way interaction. It’s about 90% “gut tells the brain things”, but it’s also 10% “brain tells the gut things”, and that 10% can make more like a 20% difference, if for example we look at the swing between “brain using that 10% communication to tell gut to do things worse” or “brain using that 10% communication to tell gut to do things better”, vs the midpoint null hypothesis of “what the gut would be doing with no direction from the brain”.
For example, if we are experiencing unmanaged chronic stress, that is going to tell our gut to do things that had an evolutionary advantage 20,000–200,000 years ago. Those things will not help us now. We do not need cortisol highs and adrenal dumping because we ate a piece of bread while stressed.
Read more (by Dr. Mayer): The Stress That Evolution Has Not Prepared Us For
With this in mind, if we want to look after our gut, then we can start before we even put anything in our mouths. Dr. Mayer recommends managing stress, anxiety, and depression from the head downwards as well as from the gut upwards.
Here’s what we at 10almonds have written previously on how to manage those things:
- No-Frills, Evidence-Based Mindfulness
- How To Set Anxiety Aside
- The Mental Health First-Aid You’ll Hopefully Never Need
Do eat for gut health! Yes, even if…
Unsurprisingly, Dr. Mayer advocates for a gut-friendly, anti-inflammatory diet. We’ve written about these things before:
…but there’s just one problem:
For some people, such as with IBS, Crohn’s, and colitis, the Mediterranean diet that we (10almonds and Dr. Mayer) generally advocate for, is inaccessible. If you (if you have those conditions) eat as we describe, a combination of the fiber in many vegetables and the FODMAPs* in many fruits, will give you a very bad time indeed.
*Fermentable Oligo-, Di-, Monosaccharides And Polyols
Dr. Mayer has the answer to this riddle, and he’s not just guessing; he and his team did science to it. In a study with hundreds of participants, he measured what happened with adherence (or not) to the Mediterranean diet (or modified Mediterranean diet) (or not), in participants with IBS (or not).
The results and conclusions from that study included:
❝Among IBS participants, a higher consumption of fruits, vegetables, sugar, and butter was associated with a greater severity of IBS symptoms. Multivariate analysis identified several Mediterranean Diet foods to be associated with increased IBS symptoms.
A higher adherence to symptom-modified Mediterranean Diet was associated with a lower abundance of potentially harmful Faecalitalea, Streptococcus, and Intestinibacter, and higher abundance of potentially beneficial Holdemanella from the Firmicutes phylum.
A standard Mediterranean Diet was not associated with IBS symptom severity, although certain Mediterranean Diet foods were associated with increased IBS symptoms. Our study suggests that standard Mediterranean Diet may not be suitable for all patients with IBS and likely needs to be personalized in those with increased symptoms.❞
In graphical form:
And if you’d like to read more about this (along with more details on which specific foods to include or exclude to get these results), you can do so…
- The study itself (full article): The Association Between a Mediterranean Diet and Symptoms of Irritable Bowel Syndrome
- Dr. Mayer’s blog (lay explanation): The Benefits of a Modified Mediterranean Diet for Irritable Bowel Syndrome
Want to know more?
Dr. Mayer offers many resources, including a blog, books, recipes, podcasts, and even a YouTube channel:
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Why is pain so exhausting?
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One of the most common feelings associated with persisting pain is fatigue and this fatigue can become overwhelming. People with chronic pain can report being drained of energy and motivation to engage with others or the world around them.
In fact, a study from the United Kingdom on people with long-term health conditions found pain and fatigue are the two biggest barriers to an active and meaningful life.
But why is long-term pain so exhausting? One clue is the nature of pain and its powerful effect on our thoughts and behaviours.
Short-term pain can protect you
Modern ways of thinking about pain emphasise its protective effect – the way it grabs your attention and compels you to change your behaviour to keep a body part safe.
Try this. Slowly pinch your skin. As you increase the pressure, you’ll notice the feeling changes until, at some point, it becomes painful. It is the pain that stops you squeezing harder, right? In this way, pain protects us.
When we are injured, tissue damage or inflammation makes our pain system become more sensitive. This pain stops us from mechanically loading the damaged tissue while it heals. For instance, the pain of a broken leg or a cut under our foot means we avoid walking on it.
The concept that “pain protects us and promotes healing” is one of the most important things people who were in chronic pain tell us they learned that helped them recover.
But long-term pain can overprotect you
In the short term, pain does a terrific job of protecting us and the longer our pain system is active, the more protective it becomes.
But persistent pain can overprotect us and prevent recovery. People in pain have called this “pain system hypersensitivity”. Think of this as your pain system being on red alert. And this is where exhaustion comes in.
When pain becomes a daily experience, triggered or amplified by a widening range of activities, contexts and cues, it becomes a constant drain on one’s resources. Going about life with pain requires substantial and constant effort, and this makes us fatigued.
About 80% of us are lucky enough to not know what it is like to have pain, day in day out, for months or years. But take a moment to imagine what it would be like.
Imagine having to concentrate hard, to muster energy and use distraction techniques, just to go about your everyday tasks, let alone to complete work, caring or other duties.
Whenever you are in pain, you are faced with a choice of whether, and how, to act on it. Constantly making this choice requires thought, effort and strategy.
Mentioning your pain, or explaining its impact on each moment, task or activity, is also tiring and difficult to get across when no-one else can see or feel your pain. For those who do listen, it can become tedious, draining or worrying.
No wonder pain is exhausting
In chronic pain, it’s not just the pain system on red alert. Increased inflammation throughout the body (the immune system on red alert), disrupted output of the hormone cortisol (the endocrine system on red alert), and stiff and guarded movements (the motor system on red alert) also go hand in hand with chronic pain.
Each of these adds to fatigue and exhaustion. So learning how to manage and resolve chronic pain often includes learning how to best manage the over-activation of these systems.
Loss of sleep is also a factor in both fatigue and pain. Pain causes disruptions to sleep, and loss of sleep contributes to pain.
In other words, chronic pain is seldom “just” pain. No wonder being in long-term pain can become all-consuming and exhausting.
What actually works?
People with chronic pain are stigmatised, dismissed and misunderstood, which can lead to them not getting the care they need. Ongoing pain may prevent people working, limit their socialising and impact their relationships. This can lead to a descending spiral of social, personal and economic disadvantage.
So we need better access to evidence-based care, with high-quality education for people with chronic pain.
There is good news here though. Modern care for chronic pain, which is grounded in first gaining a modern understanding of the underlying biology of chronic pain, helps.
The key seems to be recognising, and accepting, that a hypersensitive pain system is a key player in chronic pain. This makes a quick fix highly unlikely but a program of gradual change – perhaps over months or even years – promising.
Understanding how pain works, how persisting pain becomes overprotective, how our brains and bodies adapt to training, and then learning new skills and strategies to gradually retrain both brain and body, offers scientifically based hope; there’s strong supportive evidence from clinical trials.
Every bit of support helps
The best treatments we have for chronic pain take effort, patience, persistence, courage and often a good coach. All that is a pretty overwhelming proposition for someone already exhausted.
So, if you are in the 80% of the population without chronic pain, spare a thought for what’s required and support your colleague, friend, partner, child or parent as they take on the journey.
More information about chronic pain is available from Pain Revolution.
Michael Henry, Physiotherapist and PhD candidate, Body in Mind Research Group, University of South Australia and Lorimer Moseley, Professor of Clinical Neurosciences and Foundation Chair in Physiotherapy, University of South Australia
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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International Women’s Day (and what it can mean for you, really)
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How to not just #EmbraceEquity, but actually grow it, this International Women’s Day!
It’s International Women’s Day, and there’s a lot going on beyond the hashtagging! So, what’s happening, and how could you get involved in more than a “token” way in your workplace, business, or general life?
Well, that depends on your own environment and circumstances, but for example…
A feminist policy for productivity in the food sector?
We tend to think that in this modern world, we all have equal standing when it comes to productivity, food, and health. And yet…
❝If women do 70 per cent of the work in agriculture worldwide, but the land is mainly owned by men, then we don’t have equity yet. If in Germany, only one-tenth of female farmers manage the farm on which they work on, while they also manage the household, then there is no equity yet❞
~ Lea Leimann, Germany
What to do about it, though? It turns out there’s a worldwide organization dedicated to fixing this! It’s called Slow Food.
Their mission is to make food…
- GOOD: quality, flavorsome and healthy food
- CLEAN: production that does not harm the environment
- FAIR: accessible prices for consumers and fair conditions and pay for producers
…and yes, that explicitly includes feminism-attentive food policy:
Read all about it: Slow Food women forge change in the food system
Do you work in the food system?
If so, you can have an impact. Your knee-jerk reaction might be “I don’t”, but there are a LOT of steps from farm-to-table, so, are you sure?
Story time: me, I’m a writer (you’d never have guessed, right?) and wouldn’t immediately think of myself as working “in the food system”.
But! Not long back I (a woman) was contracted by a marketing agent (a woman) to write marketing materials for a small business (owned by a woman) selling pickles and chutneys across the Australian market, based on the recipes she learned from her mother, in India. The result?
I made an impact in the food chain the other side of the planet from me, without leaving my desk.
Furthermore, the way I went about my work empowered—at the very least—myself and the end client (the lady making and selling the pickles and chutneys).
Sometimes we can’t change the world by ourselves… but we don’t have to.
If we all just nudge things in the right direction, we’ll end up with a healthier, better-fed, more productive system for all!
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If You’re Poor, Fertility Treatment Can Be Out of Reach
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Mary Delgado’s first pregnancy went according to plan, but when she tried to get pregnant again seven years later, nothing happened. After 10 months, Delgado, now 34, and her partner, Joaquin Rodriguez, went to see an OB-GYN. Tests showed she had endometriosis, which was interfering with conception. Delgado’s only option, the doctor said, was in vitro fertilization.
“When she told me that, she broke me inside,” Delgado said, “because I knew it was so expensive.”
Delgado, who lives in New York City, is enrolled in Medicaid, the federal-state health program for low-income and disabled people. The roughly $20,000 price tag for a round of IVF would be a financial stretch for lots of people, but for someone on Medicaid — for which the maximum annual income for a two-person household in New York is just over $26,000 — the treatment can be unattainable.
Expansions of work-based insurance plans to cover fertility treatments, including free egg freezing and unlimited IVF cycles, are often touted by large companies as a boon for their employees. But people with lower incomes, often minorities, are more likely to be covered by Medicaid or skimpier commercial plans with no such coverage. That raises the question of whether medical assistance to create a family is only for the well-to-do or people with generous benefit packages.
“In American health care, they don’t want the poor people to reproduce,” Delgado said. She was caring full-time for their son, who was born with a rare genetic disorder that required several surgeries before he was 5. Her partner, who works for a company that maintains the city’s yellow cabs, has an individual plan through the state insurance marketplace, but it does not include fertility coverage.
Some medical experts whose patients have faced these issues say they can understand why people in Delgado’s situation think the system is stacked against them.
“It feels a little like that,” said Elizabeth Ginsburg, a professor of obstetrics and gynecology at Harvard Medical School who is president-elect of the American Society for Reproductive Medicine, a research and advocacy group.
Whether or not it’s intended, many say the inequity reflects poorly on the U.S.
“This is really sort of standing out as a sore thumb in a nation that would like to claim that it cares for the less fortunate and it seeks to do anything it can for them,” said Eli Adashi, a professor of medical science at Brown University and former president of the Society for Reproductive Endocrinologists.
Yet efforts to add coverage for fertility care to Medicaid face a lot of pushback, Ginsburg said.
Over the years, Barbara Collura, president and CEO of the advocacy group Resolve: The National Infertility Association, has heard many explanations for why it doesn’t make sense to cover fertility treatment for Medicaid recipients. Legislators have asked, “If they can’t pay for fertility treatment, do they have any idea how much it costs to raise a child?” she said.
“So right there, as a country we’re making judgments about who gets to have children,” Collura said.
The legacy of the eugenics movement of the early 20th century, when states passed laws that permitted poor, nonwhite, and disabled people to be sterilized against their will, lingers as well.
“As a reproductive justice person, I believe it’s a human right to have a child, and it’s a larger ethical issue to provide support,” said Regina Davis Moss, president and CEO of In Our Own Voice: National Black Women’s Reproductive Justice Agenda, an advocacy group.
But such coverage decisions — especially when the health care safety net is involved — sometimes require difficult choices, because resources are limited.
Even if state Medicaid programs wanted to cover fertility treatment, for instance, they would have to weigh the benefit against investing in other types of care, including maternity care, said Kate McEvoy, executive director of the National Association of Medicaid Directors. “There is a recognition about the primacy and urgency of maternity care,” she said.
Medicaid pays for about 40% of births in the United States. And since 2022, 46 states and the District of Columbia have elected to extend Medicaid postpartum coverage to 12 months, up from 60 days.
Fertility problems are relatively common, affecting roughly 10% of women and men of childbearing age, according to the National Institute of Child Health and Human Development.
Traditionally, a couple is considered infertile if they’ve been trying to get pregnant unsuccessfully for 12 months. Last year, the ASRM broadened the definition of infertility to incorporate would-be parents beyond heterosexual couples, including people who can’t get pregnant for medical, sexual, or other reasons, as well as those who need medical interventions such as donor eggs or sperm to get pregnant.
The World Health Organization defined infertility as a disease of the reproductive system characterized by failing to get pregnant after a year of unprotected intercourse. It terms the high cost of fertility treatment a major equity issue and has called for better policies and public financing to improve access.
No matter how the condition is defined, private health plans often decline to cover fertility treatments because they don’t consider them “medically necessary.” Twenty states and Washington, D.C., have laws requiring health plans to provide some fertility coverage, but those laws vary greatly and apply only to companies whose plans are regulated by the state.
In recent years, many companies have begun offering fertility treatment in a bid to recruit and retain top-notch talent. In 2023, 45% of companies with 500 or more workers covered IVF and/or drug therapy, according to the benefits consultant Mercer.
But that doesn’t help people on Medicaid. Only two states’ Medicaid programs provide any fertility treatment: New York covers some oral ovulation-enhancing medications, and Illinois covers costs for fertility preservation, to freeze the eggs or sperm of people who need medical treatment that will likely make them infertile, such as for cancer. Several other states also are considering adding fertility preservation services.
In Delgado’s case, Medicaid covered the tests to diagnose her endometriosis, but nothing more. She was searching the internet for fertility treatment options when she came upon a clinic group called CNY Fertility that seemed significantly less expensive than other clinics, and also offered in-house financing. Based in Syracuse, New York, the company has a handful of clinics in upstate New York cities and four other U.S. locations.
Though Delgado and her partner had to travel more than 300 miles round trip to Albany for the procedures, the savings made it worthwhile. They were able do an entire IVF cycle, including medications, egg retrieval, genetic testing, and transferring the egg to her uterus, for $14,000. To pay for it, they took $7,000 of the cash they’d been saving to buy a home and financed the other half through the fertility clinic.
She got pregnant on the first try, and their daughter, Emiliana, is now almost a year old.
Delgado doesn’t resent people with more resources or better insurance coverage, but she wishes the system were more equitable.
“I have a medical problem,” she said. “It’s not like I did IVF because I wanted to choose the gender.”
One reason CNY is less expensive than other clinics is simply that the privately owned company chooses to charge less, said William Kiltz, its vice president of marketing and business development. Since the company’s beginning in 1997, it has become a large practice with a large volume of IVF cycles, which helps keep prices low.
At this point, more than half its clients come from out of state, and many earn significantly less than a typical patient at another clinic. Twenty percent earn less than $50,000, and “we treat a good number who are on Medicaid,” Kiltz said.
Now that their son, Joaquin, is settled in a good school, Delgado has started working for an agency that provides home health services. After putting in 30 hours a week for 90 days, she’ll be eligible for health insurance.
One of the benefits: fertility coverage.
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.
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Heart Health vs Systemic Stress
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At The Heart Of Good Health
This is Dr. Michelle Albert. She’s a cardiologist with a decades-long impressive career, recently including a term as the president of the American Heart Association. She’s the current Admissions Dean at UCSF Medical School. She’s accumulated enough awards and honors that if we list them, this email will not fit in your inbox without getting clipped.
What does she want us to know?
First, lifestyle
Although Dr. Albert is also known for her work with statins (which found that pravastatin may have anti-inflammatory effects in addition to lipid-lowering effects, which is especially good news for women, for whom the lipid-lowering effects may be less useful than for men), she is keen to emphasize that they should not be anyone’s first port-of-call unless “first” here means “didn’t see the risk until it was too late and now LDL levels are already ≥190 mg/dL”.
Instead, she recommends taking seriously the guidelines on:
- getting plenty of fruit, vegetables, whole grains, lean protein
- avoiding red meat, processed meats, refined carbohydrates, and sweetened beverages
- getting your 150 minutes per week of moderate exercise
- avoiding alcohol, and definitely abstaining from smoking
See also: These Top Five Things Make The Biggest Difference To Health
Next, get your house in order
No, not your home gym—though sure, that too!
But rather: after the “Top Five Things” we linked just above, the sixth on the list would be “reduce stress”. Indeed, as Dr. Albert says:
❝Heart health is not just about the physical heart but also about emotional well-being. Stress management is crucial for a healthy heart❞
~ Dr. Michelle Albert
This is where a lot of people would advise mindfulness meditation, CBT, somatic therapies, and the like. And these things are useful! See for example:
No-Frills, Evidence-Based Mindfulness
…and:
However, Dr. Albert also advocates for awareness of what some professionals have called “Shit Life Syndrome”.
This is more about socioeconomic factors. There are many of those that can’t be controlled by the individual, for example:
❝Adverse maternal experiences such as depression, economic issues and low social status can lead to poor cognitive outcomes as well as cardiovascular disease.
Many jarring statistics illuminate a marked wealth gap by race and ethnicity… You might be thinking education could help bridge that gap. But it is not that simple.
While education does increase wealth, the returns are not the same for everyone. Black persons need a post-graduate degree just to attain similar wealth as white individuals with a high school degree.❞
~ Dr. Michelle Albert
Read in full: AHA president: The connection between economic adversity and cardiovascular health
What this means in practical terms (besides advocating for structural change to tackle the things such as the racism that has been baked into a lot of systems for generations) is:
Be aware not just of your obvious health risk factors, but also your socioeconomic risk factors, if you want to have good general health outcomes.
So for example, let’s say that you, dear reader, are wealthy and white, in which case you have some very big things in your favor, but are you also a woman? Because if so…
Women and Minorities Bear the Brunt of Medical Misdiagnosis
See also, relevant for some: Obesity Discrimination In Healthcare Settings ← you’ll need to scroll to the penultimate section for this one.
In other words… If you are one of the majority of people who is a woman and/or some kind of minority, things are already stacked against you, and not only will this have its own direct harmful effect, but also, it’s going to make your life harder and that stress increases CVD risk more than salt.
In short…
This means: tackle not just your stress, but also the things that cause that. Look after your finances, gather social support, know your rights and be prepared to self-advocate / have someone advocate for you, and go into medical appointments with calm well-prepared confidence.
Take care!
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Tranquility by Tuesday?
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I Know How She Does It: How Successful Women Make The Most of Their Time
This is Laura Vanderkam, author of “Tranquility By Tuesday” (amongst other books). Her “thing” is spending more time on what’s important, and less on what isn’t. Sounds simple, but she’s made a career out of it, so condensed here for you are…
Laura’s 7 Keys To Productivity
Key One: Plan your weeks on Fridays
You don’t want your Monday morning to be a “James Bond intro” (where everything is already in action and you’re just along for the ride, trying to figure out what’s going on). So, take some time last thing each Friday, to plan ahead for the following week!
Key Two: Measure what matters
Whatever that means to you. Laura tracks her use of time in half-hour blocks, and likes keeping track of streaks. For her, that means running daily and keeping a log of it. She also keeps track of the books she reads. For someone else it could be music practice, or a Duolingo streak, or eating fruit each day.
On which note…
“Dr. Greger’s Daily Dozen” is simpler than most nutrition trackers (where you must search for everything you eat, or scan barcodes for all ingredients).
Instead, it keeps track of whether you are having certain key health-giving foods often enough to maintain good health.
We might feature his method in a future edition of 10almonds, but for now, check the app out for yourself here:
Get Dr. Greger’s Daily Dozen on iOS / Get Dr. Greger’s Daily Dozen on Android
Dr. Greger’s Daily Dozen @ Nutrition Facts
Key Three: Figure out 2–3 “anchor” events for the weekend
Otherwise, it can become a bit of a haze and on Monday you find yourself thinking “where did the weekend go?”. So, plan some stuff! It doesn’t have to be anything out-of-this-world, just something that you can look forward to in advance and remember afterwards. It could be a meal out with your family, or a session doing some gardening, or a romantic night in with your partner. Whatever makes your life “living” and not passing you by!
Key Four: Tackle the toughest work first
You’ve probably heard about “swallowing frogs”. If not, there are various versions, usually attributed to Mark Twain.
Here’s one:
“If it’s your job to eat a frog, it’s best to do it first thing in the morning. And if it’s your job to eat two frogs, it’s best to eat the biggest one first.”
Top Productivity App “ToDoist” has an option for this, by the way!
Laura’s key advice here is: get the hard stuff done now! Before you get distracted or tired and postpone it to tomorrow (and then lather rinse repeat, so it never gets done)
10almonds Tip:
“But what if something’s really important but not as pressing as some less important, but more urgent tasks?”
Simple!
Set a timer (we love the Pomodoro method, by the way) and do one burst of the important-but-not-urgent task first. Then you can get to the more urgent stuff.
Repeat each day until the important-but-not-urgent task is done!
The 10almonds Team
Key Five: Use bits of time well
If, like many of us, you’ve a neverending “to read” list, use the 5–10 minute breaks that get enforced upon us periodically through the day!
- Use those few minutes before a meeting/phonecall!
- Use the time you spend waiting for public transport or riding on it!
- Use the time you spent waiting for a family member to finish doing a thing!
All those 5–10 minute bits soon add up… You might as well spend that time reading something you know will add value to your life, rather than browsing social media, for example.
Key Six: Make very short daily to-do lists
By “short”, Laura considers this “under 10 items”. Do this as the last part of your working day, ready for tomorrow. Not at bedtime! Bedtime is for winding down, not winding up
Key Seven: Have a bedtime
Laura shoots for 10:30pm, but whatever works for you and your morning responsibilities. Your morning responsibilities aren’t tied to a specific time? Lucky you, but try to keep a bedtime anyway. Otherwise, your daily rhythm can end up sliding around the clock, especially if you work from home!
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Stevia vs Acesulfame Potassium – Which is Healthier?
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Our Verdict
When comparing stevia to acesulfame potassium, we picked the stevia.
Why?
You may be wondering: is acesulfame potassium a good source of potassium?
And the answer is: no, it is not. Obviously, it does contain potassium, but let’s do some math here:
- Acesulfame potassium is 200x sweeter than sugar
- Therefore replacing a 15g teaspoon of sugar = 75mg acesulfame potassium
- Acesulfame potassium’s full name is “potassium 6-methyl-2,2-dioxo-2H-1,2λ6,3-oxathiazin-4-olate”
- That’s just one potassium atom in there with a lot of other stuff
- Acesulfame potassium has a molar mass of 201.042 g/mol
- Potassium itself has a molar mass of 39.098 g/mol
- Therefore acesulfame potassium is 100(39.098/201.042) = 19.45% potassium by mass
- So that 75mg of acesulfame potassium contains just under 15mg of potassium, which is less than 0.5% of your recommended daily amount of potassium. Please consider eating a fruit instead.
So, that’s that, and the rest of the nutritional values of both sweeteners are just a lot of zeros.
What puts stevia ahead? Simply, based on studies available so far, moderate consumption of stevia improves gut microdiversity, whereas acesulfame potassium harms gut microdiversity:
- The Effects of Stevia Consumption on Gut Bacteria: Friend or Foe?
- The Artificial Sweetener Acesulfame Potassium Affects the Gut Microbiome
Want to give stevia a try?
Here’s an example product on Amazon
Enjoy!
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