Glucomannan For Weight Loss, Gut Health, & More
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Glucomannan is a water-soluble dietary fiber found in the root of the konjac plant.
If you’ve had konjac noodles, also called shirataki, that’s what those are mostly made of, and it’s why they have next-to-no calories.
You may be wondering: if it’s water-soluble, how do the noodles not dissolve in water? And the answer is that the noodle-making process involves making a gel out of the fiber and water, which is then extruded into noodle shapes. In this gelatinous form, they’re fairly stable (it’s one of the most viscous dietary fibers), but yes, if you were to boil them for a long time, they would indeed turn the entire liquid contents of the saucepan into gel.
How it works for weight loss
Because of its viscosity, adding even a small amount of powdered* glucomannan to a glass of water will turn the whole thing into gel in seconds. This means that if you take glucomannan capsules with a glass of water, then so far as your stomach is concerned, you just ate a cup of gel, and the water is now processed as food, staying longer in the stomach than it otherwise would, and promoting feelings of fullness.
*i.e. dry powder, not in a gelatinous form like the noodles
As for its efficacy in weight loss, see for example:
❝Glucomannan was well-tolerated and resulted in significant weight loss in overweight and obese individuals❞
Read more: Glucomannan and obesity: a critical review
So, that covers the basic requirements, but may be wondering: does it have other benefits? And the answer is yes, it does:
❝Glucomannan appears to beneficially affect total cholesterol, LDL cholesterol, triglycerides, body weight, and fasting blood glucose❞
To further corroborate that and comment on safety…
❝Results showed a significant mean weight loss using glucomannan over an eight-week period. Serum cholesterol and low-density lipoprotein cholesterol were significantly reduced in the glucomannan treated group. No adverse reactions to glucomannan were reported.❞
Read more: Effect of glucomannan on obese patients: a clinical study
As to whether other gel-making agents work the same way, the answer is no, they don’t seem to:
❝Glucomannan induced body weight reduction in healthy overweight subjects, whereas the addition of guar gum and alginate did not seem to cause additional loss of weight❞
Read more: Experiences with three different fiber supplements in weight reduction
How it works for gut health
In the words of Dr. Yu Li et al.,
❝Konjaku flour can achieve positive effects on treating obesity, which manifest on reducing BMI, fat mass, blood glucose, and blood lipid, improving hepatic function, and also regulating intestinal microfloral structure.
Therefore, changes in gut microbiota may explain in part the effects of konjaku flour.❞
Read in full: Effects of Konjaku Flour on the Gut Microbiota of Obese Patients
This has extra positive knock-on effects too:
Want to try some?
We don’t sell it, but here for your convenience are example products on Amazon:
Konjac noodles | Glucomannan capsules
Enjoy!
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Are You Eating AGEs?
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The Trouble of the AGEs
Advanced Glycation End-Products (AGEs) are the result of the chemical process of glycation, which can occur in your body in response to certain foods you ate, or you can consume them directly, if you eat animal products that contained them (because we’re not special and other animals glycate too, especially mammals such as pigs, cows, and sheep).
As a double-whammy, if you cook animal products (especially without water, such as by roasting or frying), extra AGEs will form during cooking.
When proteinous and/or fatty food turns yellow/golden/brown during cooking, that’s generally glycation.
If there’s starch present, some or all of that yellow/golden/brown stuff will be a Maillard Reaction Product (MRP), such as acrylamide. That’s not exactly a health food, but it’s nowhere near being even in the same ballpark of badness.
In short, during cooking:
- Proteinous/fatty food turns yellow/golden/brown = probably an AGE
- Starchy food turns yellow/golden/brown = probably a MRP
The AGEs are far worse.
What’s so bad about AGEs?
Let’s do a quick tour of some studies:
- The role of advanced glycation end-products in retinal ageing and disease
- Advanced glycation end-products and their circulating receptors predict cardiovascular disease mortality in older women
- Elevated serum advanced glycation end-products in obese indicate risk for the metabolic syndrome: a link between healthy and unhealthy obesity?
- Increased levels of serum advanced glycation end-products in women with polycystic ovary syndrome
- Advanced glycation end-products and their involvement in liver disease
- Effects of advanced glycation end-products on renal fibrosis and oxidative stress
- Role of advanced glycation end-products and oxidative stress in vascular complications in diabetes
- Cancer malignancy is enhanced by advanced glycation end-products
- Advanced glycation end-products in the pathogenesis of Alzheimer’s disease
We could keep going, but you probably get the picture!
What should we do about it?
There are three main ways to reduce serum AGE levels:
Reduce or eliminate consumption of animal products
Especially mammalian animal products, such as from pigs, cows, and sheep, especially their meat. Processed versions are even worse! So, steak is bad, but bacon and sausages are literally top-tier bad.
Cook wet
Dry cooking (which includes frying, and especially includes deep fat frying, which is worse than shallow frying which is worse than air frying) produces far more AGEs than cooking with methods that involve water (boiling, steaming, slow-cooking, etc).
As a bonus, adding acidic ingredients (e.g. vinegar, lemon juice, tomato juice) can halve the amount of AGEs produced.
Consume antioxidants
Our body does have some ability to deal with AGEs, but that ability has its limits, and our body can be easily overwhelmed if we consume foods that are bad for it. So hopefully you’ll tend towards a plant-based diet, but whether you do or don’t:
You can give your body a hand by consuming antioxidant foods and drinks (such as berries, tea/coffee, and chocolate), and/or taking supplements.
Want to know more about the science of this?
Check out…
Advanced Glycation End-Products in Foods and a Practical Guide to Their Reduction in the Diet
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Zucchini & Oatmeal Koftas
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These vegetarian (and with one tweak, vegan) koftas are delicious as a snack, light lunch, or side to a larger meal. Healthwise, they contain the healthiest kind of fiber, as well as omega-3 fatty acids, and beneficial herbs and spices.
You will need
- ¼ cup oatmeal
- 1 large zucchini, grated
- 1 small carrot, grated
- ¼ cup cheese (your preference; vegan is also fine)
- 2 tbsp ground flaxseed
- 2 tbsp nutritional yeast
- ¼ bulb garlic, minced
- 2 tsp black pepper, coarse ground
- ½ tsp MSG or 1 tsp low-sodium salt
- Small handful fresh parsley, chopped
- Extra virgin olive oil, for frying
Method
(we suggest you read everything at least once before doing anything)
1) Soak the flaxseed in 2 oz hot water for at least 5 minutes
2) Combine all of the ingredients except the olive oil (and including the water that the flax has been soaking in) in a big bowl, mixing thoroughly
3) Shape into small balls, patties, or sausage shapes, and fry until the color is golden and the structural integrity is good. If doing patties, you’ll need to gently flip them to cook both sides; otherwise, rolling them to get all sides is fine.
4) Serve! Traditional is with some kind of yogurt dip, but we’re not the boss of you, so enjoy them how you like:
Enjoy!
Want to learn more?
For those interested in some of the science of what we have going on today:
- The Best Kind Of Fiber For Overall Health? ← it’s β-glucan, as found in oats
- What Omega-3 Fatty Acids Really Do For Us ← as in the flax
- The Many Health Benefits Of Garlic
- Black Pepper’s Impressive Anti-Cancer Arsenal (And More)
- Monosodium Glutamate: Sinless Flavor-Enhancer Or Terrible Health Risk? ← it’s healthier than table salt
Take care!
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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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Zucchini vs Okra – Which is Healthier?
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Our Verdict
When comparing zucchini to okra, we picked the okra.
Why?
Looking at the macros first, okra has nearly 2x the protein and more than 3x the fiber (for about 2x the carbs).
In terms of vitamins, things are also quite one-sided; zucchini has a little more vitamin B2, while okra has a lot more of vitamins A, B1, B3, B5, B6, B9, C, E, K, and choline.
Nor does the mineral situation make any compelling counterargument; zucchini is higher only in sodium, while okra has a lot more calcium, copper, iron, magnesium, manganese, phosphorus, potassium*, selenium, and zinc.
*Actually it’s only a little more potassium. But the rest are with big margins of difference.
Both of these on-the-cusp-of-being-pungent vegetables have beneficial antioxidant polyphenols (especially various forms of quercetin), but okra has more.
In short: enjoy both, of course, but there’s a clear winner here and it’s okra.
Want to learn more?
You might like to read:
Enjoy Bitter/Astringent/Pungent Foods For Your Heart & Brain
Take care!
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One More Resource Against Osteoporosis!
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Your Bones Were Made For Moving Too!
We know that to look after bone health, resistance training is generally what’s indicated. Indeed, we mentioned it yesterday, and we’ve talked about it before:
Resistance Is Useful! (Especially As We Get Older)
We also know that if you have osteoporosis already, some exercises are a better or worse idea than others:
Osteoporosis & Exercises: Which To Do (And Which To Avoid)
However! New research suggests that also getting in your recommended 150 minutes per week of moderate exercise slows bone density loss.
The study by Dr. Tiina Savikangas et al. looked at 299 people in their 70s (just over half being women) and found that, over the course of a year, bone mineral density loss was inversely correlated with moderate exercise as recorded by an accelerometer (as found in most fitness-tracking wearables and smartphones).
In other words: those who got more minutes of exercise, kept more bone mineral density.
As well as monitoring bone mineral density, the study also looked at cross-sectional area, but that remained stable throughout.
As for how much is needed:
❝Even short bursts of activity can be significant for the skeleton, so we also looked at movement in terms of the number and intensity of individual impacts. For example, walking and running cause impacts of different intensities.
We found that impacts that were comparable to at least brisk walking were associated with better preservation of bone mineral density.❞
Read more: Impacts during everyday physical activity can slow bone loss ← pop-science source, interviewing the lead researcher
On which note, we’ve a small bone to pick…
As a small correction, the pop-science source says that the subjects’ ages ranged from 70 to 85 years; the paper, meanwhile, clearly shows that the age-range was 74.4±3.9 years (shown in the “Results” table), rounded to 74.4 ± 4 years, in the abstract. So, certainly no participant was older than 78 years and four months.
Why this matters: the age range itself may be critical or it might not, but what is important is that this highlights how we shouldn’t just believe figures cited in pop-science articles, and it’s always good to click through to the source!
This paper is a particularly fascinating read if you have time, because—unlike a lot of studies—they really took great care to note what exactly can and cannot be inferred from the data, and how and why.
Especially noteworthy was the diligence with which they either controlled for, or recognized that they could not control for, far more variables than most studies even bother to mention.
This kind of transparency is critical for good science, and we’d love to see more of it!
Want to apply this to your life?
Tracking minutes-of-movement is one of the things that fitness trackers are best at, so connect your favourite app (one of these days we’ll do a fitness tracker comparison article) and get moving!
And as for the other things that fitness trackers do? As it turns out, they do have their strengths and weaknesses, which are good to bear in mind:
Take care!
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The Mind-Gut Connection – by Dr. Emeran Mayer
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We’ve reviewed books about the mind-gut connection before, so what makes this one stand out?
Firstly, it’s a lot more comprehensive than the usual “please, we’re begging you, eat some fiber”.
And yes, of course that’s part of it. Prebiotics, probiotics, reduce fried and processed foods, reduce sugar/alcohol, reduce meat, and again, eat some greenery.
But where this book really comes into its own is looking more thoroughly at the gut microbiota and their function. Dr. Mayer goes well beyond “there are good and bad bacteria” and looks at the relationship each of them have with the body’s many hormones, and especially neurotransmitters like serotonin and dopamine.
He also looks at the two-way connection between brain and gut. Yes, our gut gives us “gut feelings”, but 10% of communication between the brain and gut is in the other direction; he explores what that means for us, too.
Finally, he does give a lot of practical advice, not just dietary but also behavioral, to make the most of our mind-gut connection and make it work for our health, rather than against it.
Bottom line: this is the best book on the brain-gut connection that this reviewer has read so far, and certainly the most useful if you already know about gut-healthy nutrition, and are looking to take your understanding to the next level.
Click here to check out The Mind-Gut Connection, and start making yours work for your benefit!
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