Colloidal Gold’s Impressive Claims
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All That Glitters…
Today we’ll be examining colloidal gold supplementation.
This issue of 10almonds brought to you by the writer suddenly getting lots of advertisements for this supplement. It’s not a new thing though, and has been around in one form or another since pretty much forever.
Colloidal gold is…
- Gold, as in the yellow metal
- Colloidal, as in “very tiny insoluble particles dispersed though another substance (such as water)”
What are the claims made for it?
Honestly, just about everything is claimed for it. But to go with some popular claims:
- Reduces inflammation
- Supports skin health
- Boosts immune function
- Combats aging
- Improves cognitive function
So, what does the science say?
Does it do those things?
The short and oversimplified answer is: no
However, there is a little bit of tangential merit, so we’re going to talk about the science of it, and how the leap gets made between what the science says and what the advertisements say.
First… What makes gold so special, in general? Historically, three things:
- It’s quite rare
- It’s quite shiny
- It’s quite unreactive
- The first is about supply and demand, so that’s not very important to us in this article.
- The second is an aesthetic quality, which actually will have a little bit of relevance, but not much.
- The third has been important historically (because it meant that shiny gold stayed shiny, because it didn’t tarnish), and now also important industrially too, as gold can be used in many processes where we basically need for nothing to happen (i.e., a very inert component is needed)
That third quality—its unreactivity—has become important in medicine.
When scientists need a way to deliver something (without the delivering object getting eaten by the body’s “eat everything” tendencies), or otherwise not interact chemically with anything around, gold is an excellent choice.
Hence gold teeth, and gold fillings, by the way. They’re not just for the bling factor; they were developed because of their unreactivity and thus safety.
So, what about those health claims we mentioned above?
Here be science (creative interpretations not included)
The most-backed-by-science claim from that list is “reduces inflammation”.
Websites selling colloidal gold cite studies such as:
Gold nanoparticles reduce inflammation in cerebral microvessels of mice with sepsis
A promising title!The results of the study showed:
❝20 nm cit-AuNP treatment reduced leukocyte and platelet adhesion to cerebral blood vessels, prevented BBB failure, reduced TNF- concentration in brain, and ICAM-1 expression both in circulating polymorphonuclear (PMN) leukocytes and cerebral blood vessels of mice with sepsis. Furthermore, 20 nm cit-AuNP did not interfere with the antibiotic effect on the survival rate of mice with sepsis.❞
That “20 nm cit-AuNP” means “20 nm citrate-covered gold nanoparticles”
So it is not so much the antioxidant powers of gold being tested here, as the antioxidant powers of citrate, a known antioxidant. The gold was the carrying agent, whose mass and unreactivity allowed it to get where it needed to be.
The paper does say the words “Gold nanoparticles have been demonstrated to own important anti-inflammatory properties“ in the abstract, but does not elaborate on that, reference it, or indicate how.
Websites selling colloidal gold also cite papers such as:
Anti-inflammatory effect of gold nanoparticles supported on metal oxides
Another promising title! However the abstract mentions:
❝The effect was dependent on the MOx NPs chemical nature
[…]
The effect of Au/TiO2 NPs was not related to Au NPs size❞
MOx NPs = mineral oxide nanoparticles. In this case, the gold was a little more than a carrying agent, though, because the gold is described and explained as being a catalytic agent (i.e., its presence helps the attached mineral oxides react more quickly).
We said that was the most-backed claim, and as you can see, it has some basis but is rather tenuous since the gold by itself won’t do anything; it just helps the mineral oxides.
Next best-backed claim builds from that, which is “supports skin health”.
Sometimes colloidal gold is sold as a facial tonic. By itself it’ll distribute (inert) gold nanoparticles across your skin, and may “give you a healthy glow”, because that’s what happens when you put shiny wet stuff on your face.
Healthwise, if the facial tonic also contains some of the minerals we mentioned above, then it may have an antioxidant effect. But again, no minerals, no effect.
The claim that it “combats aging” is really a tag-on to the “antioxidant” claim.
As for the “supports immune health” claim… Websites selling colloid gold cite studies such as:
To keep things brief: gold can fight infectious diseases in much the same way that forks can fight hunger. It’s an inert carrying agent.
As for “improves cognitive function”? The only paper we could find cited was that mouse sepsis study again, this time with the website saying “researchers found that rats treated with colloidal gold showed improved spatial memory and learning ability“ whereas the paper cited absolutely did not claim that, not remotely, not even anything close to that. It wasn’t even rats, it was mice, and they did not test their memory or learning.
Is it safe?
Colloidal gold supplementation is considered very safe, precisely because gold is one of the least chemically reactive substances you could possibly consume. It is special precisely because it so rarely does anything.
However, impurities could be introduced in the production process, and the production process often involves incredibly harsh reagents to get the gold ions, and if any of those reagents are left in the solution, well, gold is safe but sodium borohydride and chloroauric acid aren’t!
Where can I get some?
In the unlikely event that our research review has given you an urge to try it, here’s an example product on Amazon
Take care!
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Grapes vs Strawberries – Which is Healthier?
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Our Verdict
When comparing strawberries to grapes, we picked the strawberries.
Why?
In terms of macros, grapes have more than 2x the carbs while strawberries have more than 2x the fiber, making this category an easy win for strawberries.
In the category of vitamins, grapes have more of vitamins A, B1, B2, B6, and K, while strawberries have more of vitamins B3, B5, B9, C, and E, making for a 5:5 tie with comparable margins of difference.
Looking at minerals, grapes have more potassium and manganese, while strawberries have more calcium, copper, iron, magnesium, phosphorus, selenium, and zinc. A clear win for strawberries here.
When it comes to polyphenols, both of these fruits are abundant in many polyphenols, but it might interest you to know that strawberries have slightly more resveratrol than red/black grapes! Still, it’s close, and there are many other polyphenols in both, and honestly we’re calling this category a tie.
Adding up the sections makes for a compelling overall win for strawberries, but by all means enjoy either or both; diversity is good!
Want to learn more?
You might like:
Can We Drink To Good Health? ← while there are polyphenols such as resveratrol in red wine that per se would boost heart health, there’s so little per glass that you may need 100–1000 glasses per day to get the dosage that provides benefits in mouse studies.
If you’re not a mouse, you might even need more than that!
To this end, many people prefer resveratrol supplementation ← link is to an example product on Amazon, but there are plenty more so feel free to shop around 😎
Enjoy!
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I want to eat healthily. So why do I crave sugar, salt and carbs?
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We all want to eat healthily, especially as we reset our health goals at the start of a new year. But sometimes these plans are sabotaged by powerful cravings for sweet, salty or carb-heavy foods.
So why do you crave these foods when you’re trying to improve your diet or lose weight? And what can you do about it?
There are many reasons for craving specific foods, but let’s focus on four common ones:
1. Blood sugar crashes
Sugar is a key energy source for all animals, and its taste is one of the most basic sensory experiences. Even without specific sweet taste receptors on the tongue, a strong preference for sugar can develop, indicating a mechanism beyond taste alone.
Neurons responding to sugar are activated when sugar is delivered to the gut. This can increase appetite and make you want to consume more. Giving into cravings also drives an appetite for more sugar.
In the long term, research suggests a high-sugar diet can affect mood, digestion and inflammation in the gut.
While there’s a lot of variation between individuals, regularly eating sugary and high-carb foods can lead to rapid spikes and crashes in blood sugar levels. When your blood sugar drops, your body can respond by craving quick sources of energy, often in the form of sugar and carbs because these deliver the fastest, most easily accessible form of energy.
2. Drops in dopamine and serotonin
Certain neurotransmitters, such as dopamine, are involved in the reward and pleasure centres of the brain. Eating sugary and carb-rich foods can trigger the release of dopamine, creating a pleasurable experience and reinforcing the craving.
Serotonin, the feel-good hormone, suppresses appetite. Natural changes in serotonin can influence daily fluctuations in mood, energy levels and attention. It’s also associated with eating more carb-rich snacks in the afternoon.
Do you get 3pm sugar cravings? Serotonin could play a role.
Marcus Aurelius/PexelsLow carb diets may reduce serotonin and lower mood. However, a recent systematic review suggests little association between these diets and risk for anxiety and depression.
Compared to men, women tend to crave more carb rich foods. Feeling irritable, tired, depressed or experiencing carb cravings are part of premenstrual symptoms and could be linked to reduced serotonin levels.
3. Loss of fluids and drops in blood sugar and salt
Sometimes our bodies crave the things they’re missing, such as hydration or even salt. A low-carb diet, for example, depletes insulin levels, decreasing sodium and water retention.
Very low-carb diets, like ketogenic diets, induce “ketosis”, a metabolic state where the body switches to using fat as its primary energy source, moving away from the usual dependence on carbohydrates.
Ketosis is often associated with increased urine production, further contributing to potential fluid loss, electrolyte imbalances and salt cravings.
4. High levels of stress or emotional turmoil
Stress, boredom and emotional turmoil can lead to cravings for comfort foods. This is because stress-related hormones can impact our appetite, satiety (feeling full) and food preferences.
The stress hormone cortisol, in particular, can drive cravings for sweet comfort foods.
A 2001 study of 59 premenopausal women subjected to stress revealed that the stress led to higher calorie consumption.
A more recent study found chronic stress, when paired with high-calorie diet, increases food intake and a preference for sweet foods. This shows the importance of a healthy diet during stress to prevent weight gain.
What can you do about cravings?
Here are four tips to curb cravings:
1) don’t cut out whole food groups. Aim for a well-balanced diet and make sure you include:
- sufficient protein in your meals to help you feel full and reduce the urge to snack on sugary and carb-rich foods. Older adults should aim for 20–40g protein per meal with a particular focus on breakfast and lunch and an overall daily protein intake of at least 0.8g per kg of body weight for muscle health
- fibre-rich foods, such as vegetables and whole grains. These make you feel full and stabilise your blood sugar levels. Examples include broccoli, quinoa, brown rice, oats, beans, lentils and bran cereals. Substitute refined carbs high in sugar like processed snack bars, soft drink or baked goods for more complex ones like whole grain bread or wholewheat muffins, or nut and seed bars or energy bites made with chia seeds and oats
2) manage your stress levels. Practise stress-reduction techniques like meditation, deep breathing, or yoga to manage emotional triggers for cravings. Practising mindful eating, by eating slowly and tuning into bodily sensations, can also reduce daily calorie intake and curb cravings and stress-driven eating
3) get enough sleep. Aim for seven to eight hours of quality sleep per night, with a minimum of seven hours. Lack of sleep can disrupt hormones that regulate hunger and cravings
4) control your portions. If you decide to indulge in a treat, control your portion size to avoid overindulging.
Overcoming cravings for sugar, salt and carbs when trying to eat healthily or lose weight is undoubtedly a formidable challenge. Remember, it’s a journey, and setbacks may occur. Be patient with yourself – your success is not defined by occasional cravings but by your ability to manage and overcome them.
Hayley O’Neill, Assistant Professor, Faculty of Health Sciences and Medicine, Bond University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Lost Art of Silence – by Sarah Anderson
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From “A Room Of One’s Own” to “Silent Mondays”, from spiritual retreats to noise-cancelling headphones, this book covers the many benefits of silence—and a couple of downsides too.
In an age where most things are available at the touch of a button, a little peaceful solitude can come at quite a premium, but what it offers can effect all manner of physical changes, from reduced stress responses to increased neurogenesis (growing new brain cells).
The tone throughout is a combination of personal and pop-science, and it’s very motivating to find a little more space-between-the-things in life.
The book is best enjoyed in a quiet room.
Bottom line: if you get the feeling sometimes that you could rest and recover fully and properly if you could just find the downtime, this book will help you find exactly that.
Click here to check out the Lost Art of Silence, and find peace and strength in it!
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How to Eat 30 Plants a Week – by Hugh Fearnley-Whittingstall
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If you’re used to eating the same two fruits and three vegetables in rotation, the “gold standard” evidence-based advice to “eat 30 different plants per week” can seem a little daunting.
Where this book excels is in reminding the reader to use a lot of diverse plants that are readily available in any well-stocked supermarket, but often get forgotten just because “we don’t buy that”, so it becomes invisible on the shelf.
It’s not just a recipe book (though yes, there are plenty of recipes here); it’s also advice about stocking up and maintaining that stock, advice on reframing certain choices to inject a little diversity into every meal without it become onerous, meal-planning rotation advice, and a lot of recipes that are easy but plant-rich, for example “this soup that has these six plants in it”, etc.
He also gives, for those eager to get started, “10 x 3 recipes per week to guarantee your 30”, in other words, 10 sets of 3 recipes, wherein each set of 3 recipes uses >30 different plants between them, such that if we have each of these set-of-three meals over the course of the week, then what we do in the other 4–18 meals (depending on how many meals per day you like to have) is all just a bonus.
The latter is what makes this book an incredibly stress-free approach to more plant-diverse eating for life.
Bottom line: if you want to be able to answer “do you get your five-a-day?” with “you mean breakfast?” because you’ve already hit five by breakfast each day, then this is the book for you.
Click here to check out How To Eat 30 Plants A Week, and indeed eat 30+ different plants per week!
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We’re only using a fraction of health workers’ skills. This needs to change
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Roles of health professionals are still unfortunately often stuck in the past. That is, before the shift of education of nurses and other health professionals into universities in the 1980s. So many are still not working to their full scope of practice.
There has been some expansion of roles in recent years – including pharmacists prescribing (under limited circumstances) and administering a wider range of vaccinations.
But the recently released paper from an independent Commonwealth review on health workers’ “scope of practice” identifies the myriad of barriers preventing Australians from fully benefiting from health professionals’ skills.
These include workforce design (who does what, where and how roles interact), legislation and regulation (which often differs according to jurisdiction), and how health workers are funded and paid.
There is no simple quick fix for this type of reform. But we now have a sensible pathway to improve access to care, using all health professionals appropriately.
A new vision for general practice
I recently had a COVID booster. To do this, I logged onto my general practice’s website, answered the question about what I wanted, booked an appointment with the practice nurse that afternoon, got jabbed, was bulk-billed, sat down for a while, and then went home. Nothing remarkable at all about that.
But that interaction required a host of facilitating factors. The Victorian government regulates whether nurses can provide vaccinations, and what additional training the nurse requires. The Commonwealth government has allowed the practice to be paid by Medicare for the nurse’s work. The venture capitalist practice owner has done the sums and decided allocating a room to a practice nurse is economically rational.
The future of primary care is one involving more use of the range of health professionals, in addition to GPs.
It would be good if my general practice also had a physiotherapist, who I could see if I had back pain without seeing the GP, but there is no Medicare rebate for this. This arrangement would need both health professionals to have access to my health record. There also needs to be trust and good communication between the two when the physio might think the GP needs to be alerted to any issues.
This vision is one of integrated primary care, with health professionals working in a team. The nurse should be able to do more than vaccination and checking vital signs. Do I really need to see the GP every time I need a prescription renewed for my regular medication? This is the nub of the “scope of practice” issue.
How about pharmacists?
An integrated future is not the only future on the table. Pharmacy owners especially have argued that pharmacists should be able to practise independently of GPs, prescribing a limited range of medications and dispensing them.
This will inevitably reduce continuity of care and potentially create risks if the GP is not aware of what other medications a patient is using.
But a greater role for pharmacists has benefits for patients. It is often easier and cheaper for the patient to see a pharmacist, especially as bulk billing rates fall, and this is one of the reasons why independent pharmacist prescribing is gaining traction.
It’s often easier for a patient to see a pharmacist than a GP. PeopleImages.com – Yuri A/Shutterstock Every five years or so the government negotiates an agreement with the Pharmacy Guild, the organisation of pharmacy owners, about how much pharmacies will be paid for dispensing medications and other services. These agreements are called “Community Pharmacy Agreements”. Paying pharmacists independent prescribing may be part of the next agreement, the details of which are currently being negotiated.
GPs don’t like competition from this new source, even though there will be plenty of work around for GPs into the foreseeable future. So their organisations highlight the risks of these changes, reopening centuries old turf wars dressed up as concerns about safety and risk.
Who pays for all this?
Funding is at the heart of disputes about scope of practice. As with many policy debates, there is merit on both sides.
Clearly the government must increase its support for comprehensive general practice. Existing funding of fee-for-service medical benefits payments must be redesigned and supplemented by payments that allow practices to engage a range of other health professionals to create health-care teams.
This should be the principal direction of primary care reform, and the final report of the scope of practice review should make that clear. It must focus on the overall goal of better primary care, rather than simply the aspirations of individual health professionals, and working to a professional’s full scope of practice in a team, not a professional silo.
In parallel, governments – state and federal – must ensure all health professionals are used to their best of their abilities. It is a waste to have highly educated professionals not using their skills fully. New funding arrangements should facilitate better access to care from all appropriately qualified health professionals.
In the case of prescribing, it is possible to reconcile the aspirations of pharmacists and the concerns of GPs. New arrangements could be that pharmacists can only renew medications if they have agreements with the GP and there is good communication between them. This may be easier in rural and suburban areas, where the pharmacists are better known to the GPs.
The second issues paper points to the complexity of achieving scope of practice reforms. However, it also sets out a sensible path to improve access to care using all health professionals appropriately.
Stephen Duckett, Honorary Enterprise Professor, School of Population and Global Health, and Department of General Practice and Primary Care, The University of Melbourne
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Here’s the latest you need to know about bird flu
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What you need to know
- Although bird flu continues to spread in wild birds, livestock, and humans, the risk to the public remains low.
- The majority of U.S. bird flu cases have been reported in farm workers who had direct contact with infected birds and cattle. Health officials are working to monitor the spread of the virus and improve protections for those most at risk.
- Recent data suggests that mutations in bird flu viruses could make them more dangerous to humans and potentially increase the risk of a pandemic.
- On January 6, Louisiana health officials confirmed the first U.S. death from bird flu.
Throughout 2024, dozens of human cases of H5N1 bird flu were detected as the virus spreads rapidly in livestock. The current risk to humans is low but not nonexistent. Here’s everything you need to know about the current status and future outlook of H5 bird flu in the United States.
Current U.S. bird flu status (as of January 6, 2025)
As of January 6, 66 human bird flu cases have been reported in eight states. Over half of all cases are in California. The state’s governor declared a state of emergency as a “proactive” action against bird flu on December 18.
On January 6, the Louisiana Department of Health reported the first U.S. bird flu death. The patient, a man over age 65, was previously confirmed to be the first severe bird flu case in the U.S. and the first case linked to backyard flocks. The department emphasized that the risk to the public is low and that no new cases or evidence of human transmission have been detected in the state.
All but two human bird flu cases this year were in farm workers who were exposed to infected livestock. The exposure source of the remaining cases—one in California and one in Missouri—is unknown.
The CDC reported on November 22 that a child in California tested positive for bird flu, the first known pediatric bird flu case in the U.S. However, it is unclear how the child contracted the virus, as they had no known contact with infected animals.
To date, there have been no reports of human transmission of bird flu during the current outbreak. Additionally, most human cases have not been severe, and no deaths have been reported. For these reasons, experts are confident that the bird flu risk to humans remains low.
“In the short term, there is very little threat,” Dr. Scott Roberts, an infectious diseases specialist with Yale Medicine said. “The risk for the general public is so low,” he emphasized to Yale Medicine.
How the U.S. is monitoring bird flu
The CDC continues to monitor the circulation of bird flu in humans as part of its year-round flu monitoring. The agency is also working to improve protections for farm workers, who are at the highest risk of contracting bird flu.
In November 2024, the CDC also announced expanded actions and updated guidance for farm workers, including improved access to and training for using personal protective equipment (such as N95 face masks), more rigorous testing procedures, and increased outreach. These updates followed a CDC report finding that 7 percent of participating dairy workers had signs of a recent bird flu infection. A second CDC study, also released in November, found inadequate use of personal protective equipment among dairy workers on farms with bird flu outbreaks.
After the H5N1 virus was found in raw milk being sold in California, the U.S. Department of Agriculture announced on December 6 that unpasteurized milk must be tested for bird flu. The USDA order also requires dairy farms with positive bird flu cases to cooperate with health officials in disease surveillance.
Is a bird flu pandemic possible?
In early November, a Canadian teen was hospitalized with bird flu caused by a virus that’s closely related to the H5N1 virus circulating in the U.S. The case has troubled experts for a few reasons.
First, it is Canada’s first human bird flu case where the patient was not infected while traveling, and the source of exposure is unknown. Second, the teen experienced severe symptoms and developed a lung infection requiring critical care, raising concern that bird flu infections may be more severe in younger people.
The final and biggest concern about the case is that genetic analysis revealed several changes in the virus’s DNA sequence, called mutations, that could potentially make the virus better able to infect humans. Researchers say that two of those mutations could make it easier for the virus to infect humans, and another one may make it easier for the virus to replicate after infecting a human. However, it’s unclear if the changes occurred before or after the teen was infected.
Scott Hensley, a professor of microbiology at the University of Pennsylvania, told Nature that “this should serve as a warning: this virus has the capacity to switch very quickly into a form that can cause severe disease.”
Notably, even in this more severe case, there is still no evidence of human transmission, which is necessary for a potential bird flu pandemic. However, the case underscores the risk of new and potentially dangerous mutations emerging as the H5N1 virus continues to spread and multiply.
A study published in Science on December 5 found that a genetic change on a protein on the surface of the virus could make it easier for the virus to attach to and infect human cells. But none of the mutations observed in the Canadian case are those identified in the study.
Importantly, the researchers stressed that the ability of the virus to attach to a specific part of human cells “is not the only [factor] required for human-to-human transmission of influenza viruses.”
How to stay safe
Most people are not at high risk of being exposed to bird flu. The virus is spreading between animals and from animals to humans through direct contact. The CDC recommends avoiding the consumption of raw milk products and direct contact with wild birds and potentially infected livestock.
“Pasteurization kills the bird flu virus and other harmful germs that can be found in raw milk,” says a November 24 California Department of Public Health press release. “CDPH advises consumers not to drink raw milk or eat raw milk products due to the risk of foodborne illnesses.”
Additionally, although the annual flu shot does not protect against bird flu, getting vaccinated helps prevent infection with seasonal flu and bird flu at the same time. In very rare instances, getting infected by two influenza viruses at the same time can result in a combination of genetic material that produces a new virus.
This phenomenon, known as antigenic shift, triggered the 2009 swine flu pandemic.
Learn more about how to protect yourself and your loved ones against bird flu.
For more information, talk to your health care provider.
This article first appeared on Public Good News and is republished here under a Creative Commons license.
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