Is cold water bad for you? The facts behind 5 water myths
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We know the importance of staying hydrated, especially in hot weather. But even for something as simple as a drink of water, conflicting advice and urban myths abound.
Is cold water really bad for your health? What about hot water from the tap? And what is “raw water”? Let’s dive in and find out.
Myth 1: Cold water is bad for you
Some recent TikToks have suggested cold water causes health problems by somehow “contracting blood vessels” and “restricting digestion”. There is little evidence for this.
While a 2001 study found 51 out of 669 women tested (7.6%) got a headache after drinking cold water, most of them already suffered from migraines and the work hasn’t been repeated since.
Cold drinks were shown to cause discomfort in people with achalasia (a rare swallowing disorder) in 2012 but the study only had 12 participants.
For most people, the temperature you drink your water is down to personal preference and circumstances. Cold water after exercise in summer or hot water to relax in winter won’t make any difference to your overall health.
Myth 2: You shouldn’t drink hot tap water
This belief has a grain of scientific truth behind it. Hot water is generally a better solvent than cold water, so may dissolve metals and minerals from pipes better. Hot water is also often stored in tanks and may be heated and cooled many times. Bacteria and other disease-causing microorganisms tend to grow better in warm water and can build up over time.
It’s better to fill your cup from the cold tap and get hot water for drinks from the kettle.
Myth 3: Bottled water is better
While bottled water might be safer in certain parts of the world due to pollution of source water, there is no real advantage to drinking bottled water in Australia and similar countries.
According to University of Queensland researchers, bottled water is not safer than tap water. It may even be tap water. Most people can’t tell the difference either. Bottled water usually costs (substantially) more than turning on the tap and is worse for the environment.
What about lead in tap water? This problem hit the headlines after a public health emergency in Flint, Michigan, in the United States. But Flint used lead pipes with a corrosion inhibitor (in this case orthophosphate) to keep lead from dissolving. Then the city switched water sources to one without a corrosion inhibitor. Lead levels rose and a public emergency was declared.
Fortunately, lead pipes haven’t been used in Australia since the 1930s. While lead might be present in some old plumbing products, it is unlikely to cause problems.
Myth 4: Raw water is naturally healthier
Some people bypass bottled and tap water, going straight to the source.
The “raw water” trend emerged a few years ago, encouraging people to drink from rivers, streams and lakes. There is even a website to help you find a local source.
Supporters say our ancestors drank spring water, so we should, too. However, our ancestors also often died from dysentery and cholera and their life expectancy was low.
While it is true even highly treated drinking water can contain low levels of things like microplastics, unless you live somewhere very remote, the risks of drinking untreated water are far higher as it is more likely to contain pollutants from the surrounding area.
Myth 5: It’s OK to drink directly from hoses
Tempting as it may be, it’s probably best not to drink from the hose when watering the plants. Water might have sat in there, in the warm sun for weeks or more potentially leading to bacterial buildup.
Similarly, while drinking water fountains are generally perfectly safe to use, they can contain a variety of bacteria. It’s useful (though not essential) to run them for a few seconds before you start to drink so as to get fresh water through the system rather than what might have been sat there for a while.
We are fortunate to be able to take safe drinking water for granted. Billions of people around the world are not so lucky.
So whether you like it hot or cold, or somewhere in between, feel free to enjoy a glass of water this summer.
Just don’t drink it from the hose.
Oliver A.H. Jones, Professor of chemistry, RMIT University
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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The Purple Parsnip’s Bioactive Brain Benefits (& more)
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This Root Might Be A Guardian Angel
Sometimes we go searching for supplements to research; sometimes supplements present themselves for examination! In this case, our attention was grabbed by a headline:
Angelica gigas extract emerges as a potential treatment for vascular disease
Angelica who?
Angelica gigas, also called the purple parsnip (amongst other names), is a flowering plant native to Korea. It has assorted medicinal properties, and in this case, it was its heart-healthy benefits that were making news:
❝Ultimately, this study presents clearly evidence that Angelica gigas extract is a promising natural product-based functional food/herbal medicine candidate for preventing or regulating hyperlipidemic cardiovascular complications❞
But it has a lot more to offer…
The root has various bioactive metabolites, but the compounds that most studies are most interested in are decursin and decursinol, for their neuroprotective and cognitive enhancement effects:
❝[C]rude extracts and isolated components from the root of A. gigas exhibited neuroprotective and cognitive enhancement effects.
Neuronal damage or death is the most important factor for many neurodegenerative diseases.
In addition, recent studies have clearly demonstrated the possible mechanisms behind the neuroprotective action of extracts/compounds from the root of A. gigas.❞
That middle paragraph there? That’s one of the main pathogenic processes of Alzheimer’s, Parkinson’s, Huntington’s, and Multiple Sclerosis.
Angelica gigas attenuates (reduces the force of) that process:
❝The published reports revealed that the extracts and isolated components from the root of A. gigas showed neuroprotective and cognitive enhancement properties through various mechanisms such as anti-apoptosis, antioxidative actions, inhibiting mRNA and protein expressions of inflammatory mediators and regulating a number of signaling pathways.
In conclusion, the A. gigas root can serve as an effective neuroprotective agent by modulating various pathophysiological processes❞
Read more: Neuroprotective and Cognitive Enhancement Potentials of Angelica gigas Nakai Root: A Review
Beyond neuroprotection & cognitive enhancement
…and also beyond its protection against vascular disease, which is what got our attention…
Angelica gigas also has antioxidant properties, anti-cancer properties, and general immune-boosting properties.
We’ve only so much room, so: those links above will take you to example studies for those things, but there are plenty more where they came from, so we’re quite confident in this one.
Of course, what has antioxidant properties is usually anti-inflammatory, anti-cancer, and anti-aging, because these things are reliant on many of the same processes as each other, with a lot of overlap.
Where can we get it?
We don’t sell it, but here’s an example product on Amazon, for your convenience
Enjoy!
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Pulse – by Jenny Chandler
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Beans, chickpeas, and lentils are well-established super-healthy foods, but they’re often not a lot of people’s favorite. And why? Usually because of unhappy associations with boring dishes that can barely be called dishes.
This book raises the bar for pulses of various kinds, and not only provides recipes (180 of them) but also guidelines on principles, tips and tricks, what works and what doesn’t, what makes things better or worse, perfect partners, sprouting, and more.
The recipes themselves are not all vegan, nor even all vegetarian, but the beans are the star throughout. For those who are vegan or vegetarian, it’s easy to make substitutions, not least of all because the author is generous with “try this instead of that” and “consider also” suggestions, to help us tailor each dish to our personal preferences, and even the desired vibe of a given meal.
The dishes are neither overly simplistic (it’s not a student survival cookbook, by any means) nor overly complicated; rather, enough is done to make each dish invitingly tasty, and nothing extraneous or pretentious is added for the sake of being fancy. This is about delicious home cooking, nothing more nor less.
If the book has a weakness, it’s that visual learners will feel the absence of pictures for many recipes. But, the text is clear, the instructions are easy to follow, and a photo for each dish would probably have doubled the cost of the book, at least, while halving the number of recipes.
Bottom line: if you’d like to get more beans and other pulses in your diet, but are unsure how to make it exciting, this is an excellent option.
Click here to check out Pulse, and expand your kitchen repertoire!
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Putting a Halt to Feeling Lost, Anxious, Stressed & Unhappy
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Starting From the Middle
Today’s video (below) dives straight into the heart of the issue, examining the victim mindset, with Dr. Gabor Maté immediately, and quite vulnerably, sharing his personal experiences conquering feelings of despair and anxiety.
As one of the comments on the video says, Dr. Maté is a “person who teaches about something because they experience it themselves”. And it shows through his approach.
With raw honesty, Dr. Maté empathizes with those grappling with inner turmoil, offering hope by emphasizing the power of healing in the present moment.
What is His Method?
Explained simply, Dr. Maté urges individuals to seek trauma-informed care and therapies that address underlying wounds; he emphasizes the pitfalls of relying solely on medication, and instead highlights the idea that triggers can be seen as opportunities for self-reflection and growth. He urges individuals to approach their triggers with compassionate curiosity rather than self-judgment.
In short, Dr Maté’s empathetic approach immediately calms the viewer, whilst providing knowledge crucial to self-improvement.
Let this video act as a reminder that we should take our mental health as seriously as our general health.
How was the video? If you’ve discovered any great videos yourself that you’d like to share with fellow 10almonds readers, then please do email them to us!
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Triple Life Threat – by Donald R. Lyman
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This book takes a similar approach to “How Not To Die” (which we featured previously), but focussed specifically on three things, per the title: chronic pulmonary obstructive disease (CPOD), diabetes (type 2), and Alzheimer’s disease.
Lyman strikes a great balance of being both information-dense and accessible; there’s a lot of reference material in here, and the reader is not assumed to have a lot of medical knowledge—but we’re not patronized either, and this is an informative manual, not a sensationalized scaremongering piece.
All in all… if you have known risk factors for one or more of three diseases this book covers, the information within could well be a lifesaver.
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Is Marine Collagen Worth Taking?
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Questions and Answers at 10almonds
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
This newsletter has been growing a lot lately, and so have the questions/requests, and we love that! In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
I wanted to ask if you think marine collagen is decent to take. I’ve heard a lot of bad press about it
We don’t know what you’ve heard, but generally speaking it’s been found to be very beneficial to bones, joints, and skin! We wrote about it quite recently on a “Research Review Monday”:
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How To Prevent And Reverse Type 2 Diabetes
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Turn back the clock on insulin resistance
This is Dr. Jason Fung. He’s a world-leading expert on intermittent fasting and low carbohydrate approaches to diet. He also co-founded the Intensive Dietary Management Program, later rebranded to the snappier title: The Fasting Method, a program to help people lose weight and reverse type 2 diabetes. Dr. Fung is certified with the Institute for Functional Medicine, for providing functional medicine certification along with educational programs directly accredited by the Accreditation Council for Continuing Medical Education (ACCME).
Why Intermittent Fasting?
Intermittent fasting is a well-established, well-evidenced, healthful practice for most people. In the case of diabetes, it becomes complicated, because if one’s blood sugars are too low during a fasting period, it will need correcting, thus breaking the fast.
Note: this is about preventing and reversing type 2 diabetes. Type 1 is very different, and sadly cannot be prevented or reversed in this fashion.
However, these ideas may still be useful if you have T1D, as you have an even greater need to avoid developing insulin resistance; you obviously don’t want your exogenous insulin to stop working.
Nevertheless, please do confer with your endocrinologist before changing your dietary habits, as they will know your personal physiology and circumstances in ways that we (and Dr. Fung) don’t.
In the case of having type 2 diabetes, again, please still check with your doctor, but the stakes are a lot lower for you, and you will probably be able to fast without incident, depending on your diet itself (more on this later).
Intermittent Fasting can be extra helpful for the body in the case of type 2 diabetes, as it helps give the body a rest from high insulin levels, thus allowing the body to become gradually re-sensitised to insulin.
Why low carbohydrate?
Carbohydrates, especially sugars, especially fructose*, cause excess sugar to be quickly processed by the liver and stored there. When the body’s ability to store glycogen is exceeded, the liver stores energy as fat instead. The resultant fatty liver is a major contributor to insulin resistance, when the liver can’t keep up with the demand; the blood becomes spiked full of unprocessed sugars, and the pancreas must work overtime to produce more and more insulin to deal with that—until the body starts becoming desensitized to insulin. In other words, type 2 diabetes.
There are other factors that affect whether we get type 2 diabetes, for example a genetic predisposition. But, our carb intake is something we can control, so it’s something that Dr. Fung focuses on.
*A word on fructose: actual fruits are usually diabetes-neutral or a net positive due to their fiber and polyphenols.
Fructose as an added ingredient, however, not so much. That stuff zips straight into your veins with nothing to slow it down and nothing to mitigate it.
The advice from Dr. Fung is simple here: cut the carbs. If you are already diabetic and do this with no preparation, you will probably simply suffer hypoglycemia, so instead:
- Enjoy a fibrous starter (a salad, some fruit, or perhaps some nuts)
- Load up with protein first, during your main meal—this will start to trigger your feelings of satedness
- Eat carbs last (preferably whole, unprocessed carbohydrates), and stop eating when 80% full.
Adapting Intermittent Fasting to diabetes
Dr. Fung advocates for starting small, and gradually increasing your fasting period, until, ideally, fasting 16 hours per day. You probably won’t be able to do this immediately, and that’s fine.
You also probably won’t be able to do this, if you don’t also make the dietary adjustments that help to give your liver a break, and thus by knock-on-effect, give your pancreas a break too.
With the dietary adjustments too, however, your insulin production-and-response will start to return to its pre-diabetic state, and finally its healthy state, after which, it’s just a matter of maintenance.
Want to hear more from Dr. Fung?
You may enjoy his blog, and for those who like videos, here is his YouTube channel:
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