Dealing with Thirst!
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Busting The Myth of “Eight Glasses Of Water A Day”
Everyone knows we must drink 8 glasses of water a day, or else we’re going to get a failing grade at being a healthy human—like not flossing, or not using adequate sunscreen.
But… Do we? And does tea count? How about (we dare but whisper it) coffee? And soda drinks are mostly water, right? But aren’t some drinks dehydrating? Are special electrolyte drinks really better? There are so many things to consider, so many differing advices, and it’s easy to give up, or just choose what to believe in as a leap of faith.
A quick brain-teaser for you first, though:
If coffee and soda don’t count because they’re dehydrating, then what if you were to take:
– A concentrated tiny cup of espresso, and then a glass of water, would the glass of water count?
– Or (we don’t relish the thought) what if you took a spoonful of soda syrup, and then a glass of water, would the glass of water count?
If your answer was “yes, it’s a glass of water”, then why would it not count if it were taken all at once (e.g. as an Americano coffee, or a regular soda)?
If your answer was “yes, but that water might only offset the dehydration caused by the coffee/syrup, so I might only be breaking even”, then you were thinking about this the right way:
How much water you need depends on many factors that can be affected by what else you are consuming and what else you are doing. Science loves averages, so eight glasses a day may be great if you are of average health, and average body size, in a temperate climate, doing moderate exercise, and so on and so on.
If you’re not the most average person of all time? You may need to take into account a lot of factors, ranging from what you ate for dinner to how much you perspired during your morning exercises. As you (probably) don’t live in laboratory conditions, this can become an impossible task—and if you missed (or guessed incorrectly) even one factor, the whole calculation will be thrown off. But is there any other way to know?
What of the infamous pee test? Drink enough to make your urine as clear as possible, and if it’s dark, you’re dehydrated, common wisdom says.
In reality, however, that tells you not what’s in your body, but rather, what got ejected from your body. If your urine is dark, it might mean you had too little water, but it also could just mean you had the right amount of water but too much sodium, for instance. A study of this was done on athletes, and found no correlation between urine color and actual bodily hydration when measured directly via a blood test.
So, if we can’t just have an app tell us “drink this many glasses of water”, and we can’t trust urine color, what can we do?
What we can do is trust that our body comes with (for free!) a wonderful homeostatic system and it will try to correct any imbalances. If you are thirsty, you’re dehydrated. Drink something with plenty of water in, if not plain water.
But what about special electrolyte drinks? If you need salts, you will crave them. Craving a salty snack? Go for it! Or if you prefer not to snack, do a salt lick test (just put a little salt on your finger, and taste it; if it tastes good, wait a minute or two, and then have a little more, and repeat until it doesn’t).
Bonus Tip:
- Make sure you always have a source of hydration (that you enjoy!) to hand. Maybe it’s chilled water, maybe it’s a pot of tea, maybe it’s a sports drink, it doesn’t matter too much. Even coffee is actually fine, by the way (but don’t overdo it).
- Make a personal rule: “I will always make time for hydration”. That means, if you’re thirsty, have something with water in it now. Not when you’ve finished what you’re doing (unless you really can’t stop, because you are a racecar driver mid-race, or a surgeon mid-operation, or something), but now. Do not postpone it until after you’ve done some other thing first; you will forget and it will keep getting postponed. Always make time for water.
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Health Hacks from 20 Doctors
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Doctor Mike’s Approach
You may be used to Tuesday’s expert insights column, where we break down the work or research of a medical expert. Doctor Mike, the creator of the video below, has put us to shame, interviewing 20 experts and condensing it into one, sub 12-minute video.
In short, Doctor Mike has interviewed medical professionals and asked them to share a unique piece of advice, specific to their field, that’s easy to incorporate into your daily routine. He calls them Health Hacks (hey, that sounds similar to our Life Hacks section).
We aren’t going to list out all 20—you’ll have to watch the video for that—but here are a few of our favourites
Toenail Fungus Treatment
Dr. Dana Brems, a podiatrist, reveals that Vicks VapoRub has antifungal properties, and thus can be used on toenails affected by fungus.
Water Intake Myth
Dr. Rena Malik, a urologist, debunks the myth that everyone needs to drink eight glasses of water daily, advising people to drink when thirsty and monitor urine color for hydration.
(You can see what we’ve written on this subject here, as well as here).
Natural Lip Plumper
Dr. Anthony Youn, a plastic surgeon, offers a simple recipe for plumping lips—add a drop or two of food-grade peppermint oil to your lip gloss.
Toothbrushing Technique:
Dr. Winters, an orthodontist, explains that brushing teeth at a 45-degree angle towards the gums is more effective than the common side-to-side method. See our thoughts on this here and here.
Want more tips? Watch them all in the video below:
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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Can Ginkgo Tea Be Made Safe? (And Other Questions)
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It’s Q&A Day 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!
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’d be interested in OTC prostrate medication safety and effectiveness.❞
Great idea! Sounds like a topic for a main feature one day soon, but while you’re waiting, you might like this previous main feature we did, about a supplement that performs equally to some prescription BPH meds:
❝Was very interested in the article on ginko bilboa as i moved into a home that has the tree growing in the backyard. Is there any way i can process the leaves to make a tea out of it.❞
Glad you enjoyed! First, for any who missed it, here was the article on Ginkgo biloba:
Ginkgo Biloba, For Memory And, Uh, What Else Again?
Now, as that article noted, Ginkgo biloba seeds and leaves are poisonous. However, there are differences:
The seeds, raw or roasted, contain dangerous levels of a variety of toxins, though roasting takes away some toxins and other methods of processing (boiling etc) take away more. However, the general consensus on the seeds is “do not consume; it will poison your liver, poison your kidneys, and possibly give you cancer”:
Ginkgo biloba L. seed; A comprehensive review of bioactives, toxicants, and processing effects
The leaves, meanwhile, are much less poisonous with their ginkgolic acids, and their other relevant poison is very closely related to that of poison ivy, involving long-chain alkylphenols that can be broken down by thermolysis, in other words, heat:
However, this very thorough examination of the potential health benefits and risks of ginkgo tea, comes to the general conclusion “this is not a good idea, and is especially worrying in elders, and/or if taking various medications”:
In summary:
- Be careful
- Avoid completely if you have a stronger-than-usual reaction to poison ivy
- If you do make tea from it, green leaves appear to be safer than yellow ones
- If you do make tea from it, boil and stew to excess to minimize toxins
- If you do make tea from it, doing a poison test is sensible (i.e. start with checking for a skin reaction to a topical application on the inside of the wrist, then repeat at least 6 hours later on the lips, then at least 6 hours later do a mouth swill, then at least 12 hours later drink a small amount, etc, and gradually build up to “this is safe to consume”)
For safety (and legal) purposes, let us be absolutely clear that we are not advising you that it is safe to consume a known poisonous plant, and nor are we advising you to do so.
But the hopefully only-ever theoretical knowledge of how to do a poison test is a good life skill, just in case
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Hawthorn For The Heart (& More)
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Hawthorn, The Heart-Healthy Helper
Hawthorn, a berry of the genus Crataegus (there are many species, but they seem to give more or less the same benefits), has been enjoyed for hundreds of years, if not thousands, as a herbal remedy for many ailments, mostly of the cardiovascular, digestive, and/or endocrine systems:
Crataegus pinnatifida: Chemical Constituents, Pharmacology, and Potential Applications
Antioxidant & Anti-inflammatory
Like most berries, it’s full of helpful polyphenols, with antioxidant and anti-inflammatory properties. Indeed, as Dr. Nabavi et al. wrote,
❝Crataegus monogyna Jacq. (hawthorn) is one of the most important edible plants of the Rosaceae family and is also used in traditional medicine.
Growing evidence has shown that this plant has various interesting physiological and pharmacological activities due to the presence of different bioactive natural compounds.
In addition, scientific evidence suggests that the toxicity of hawthorn is negligible. ❞
Read in full: Polyphenolic Composition of Crataegus monogyna Jacq.: From Chemistry to Medical Applications
While “the toxicity of hawthorn is negligible” may be reasonably considered a baseline for recommending an edible plant, it’s still important as just that: a baseline. It’s good to know that berries are safe, after all!
More positively, about those antioxidant and anti-inflammatory properties:
This one was a mouse study, but it’s important as it about modulating liver injury after being fed a high fructose diet.
In other words: it a) helps undo the biggest cause of non-alcoholic fatty liver disease, b) logically, likely guards against diabetes also (by the same mechanism)
Anti-Diabetes Potential
Curious about that latter point, we looked for studies, and found, for example:
- Hypoglycemic effect of hawthorn in type II diabetes mellitus rat model
- Molecular Mechanisms of Hawthorn Extracts in Multiple Organs Disorders in Underlying of Diabetes: A Review
- Modulation of GPC-4 and GPLD1 serum levels by improving glycemic indices in type 2 diabetes: Resistance training and hawthorn extract intervention
Noteworthily, those studies are from the past couple of years, which is probably why we’re not seeing many human trials for this yet—everything has to be done in order, and there’s a lengthy process between each.
We did find some human trials with hawthorn in diabetes patients, for example:
…but as you see, that’s testing not its antidiabetic potential, so far demonstrated only in mice and rats (so far as we could find), but rather its blood pressure lowering effects, using diabetic patients as a sample.
Blood pressure benefits
Hawthorn has been studied specifically for its hypotensive effect, for example:
As an extra bonus, did you notice in the conclusion,
❝Furthermore, a trend towards a reduction in anxiety (p = 0.094) was also observed in those taking hawthorn compared with the other groups.
These findings warrant further study, particularly in view of the low dose of hawthorn extract used.❞
…it seems that not a lot more study has been done yet, but that is promising too!
Other blood metrics
So, it has antidiabetic and antihypertensive benefits, what of blood lipids?
Hawthorn Fruit Extract Elevates Expression of Nrf2/HO-1 and Improves Lipid Profiles
And as for arterial plaque?
here it was tested alongside another herb, and performed well (also against placebo).
In summary…
Hawthorn (Crataegus sp.) is…
- a potent berry containing many polyphenols with good antioxidant and anti-inflammatory effects
- looking promising against diabetes, but research for this is still in early stages
- found to have other cardioprotective effects (antihypertensive, improves lipid profiles), too
- considered to have negligible toxicity
Where can I get it?
As ever, we don’t sell it, but here for your convenience is an example product on Amazon
Enjoy!
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Minimize Aging’s Metabolic Slump
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It’s Q&A Day at 10almonds!
Have a question or a request? We love to hear from you!
In cases where we’ve already covered something, we might link to what we wrote before, but will always be happy to revisit any of our topics again in the future too—there’s always more to say!
As ever: if the question/request can be answered briefly, we’ll do it here in our Q&A Thursday edition. If not, we’ll make a main feature of it shortly afterwards!
So, no question/request too big or small
❝I know that metabolism slows with age, are there any waypoints or things to look out for? I don’t know whether I should be eating less, or doing less, or taking some other approach entirely. What’s recommended?❞
Age and sex count for a lot with this one! As metabolism is in large part directed by hormones:
- For men, declining testosterone (often from around 45 onwards) can result in a metabolic slump
- For women, declining estrogen with the menopause does have an effect, but progesterone is the bigger factor for metabolism in the sense you are talking about.
In both cases, simply taking more of those hormones can often help, but please of course speak with an endocrinologist if that seems like a possible option for you, as your circumstances (and physiology) may vary.
If you’d like to go to that conversation well-armed with information, here are some good starting points, by the way:
- The Testosterone Drop, & Topping Up Testosterone
- Menopausal HRT: Bioidentical vs Animal (It Makes A Difference!)
And if you’re wondering about the natural vs pharmaceutical approaches…
- What Does “Balance Your Hormones” Even Mean?
- What You Should Have Been Told About The Menopause Beforehand
About your metabolic base rate
We tend to think of “fast metabolism good, slow metabolism bad”, and that’s a reasonable general premise… but it’s not necessarily always so.
After all, if you could double your metabolism and keep it there all the time, without changing anything else, well… You’ve heard the phrase “burning the candle at both ends”? So, having at least some downtime is important too.
See for example: Sleep Deprivation & Diabetes Risk
What’s critical, when it comes to base metabolic rate, is that your body must be capable of adequately processing what you are putting into it. Because if your body can’t keep up with the input, it’ll just start storing the excess chemical energy in the quickest and easiest way possible.
…which is a fast track to metabolic disorder in general and type 2 diabetes in particular. For more on the science and mechanics of this, see:
How To Prevent And Reverse Type 2 Diabetes
As for portion sizes…
Your body knows what you need, so listen to it. There is no external source of knowledge that can tell you how much food you need better than your own body itself can tell you.
You may be wondering “how exactly do I listen to my body, though?”, in which case, check out:
The Kitchen Doctor: Interoception & Mindful Eating
As for exercise…
When you exercise, your metabolic rate temporarily increases. After most kinds of exercise, your metabolism slumps again afterwards to compensate.
There are two ways to avoid this:
- Exercise Less, Move More ← it’s about maximizing time spent not sitting still
- High Intensity Interval Training ← a special kind of exercise, the only one known to keep the metabolism running high for a couple of hours afterwards, with no counter-slump
…which makes it pretty effective indeed
Would you like this section to be bigger? If so, send us more questions!
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What to Eat When – by Drs. Michael Roizen and Michael Crupain
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Here at 10almonds, we cover a lot of the “what to eat”, but tend to only sometimes touch on the “when”—and indeed, this is a reflection of a popular focus. But what if we were to pay a little more attention to that “when”; what would it get us?
According to Drs. Roizen and Crupain… Quite a bit!
In this work, they take into account the various factors affecting the benefit (or harm!) of what we eat when:
- in the context of our circadian rhythm
- in the context of our insulin responses
- in the context of intermittent fasting
The style throughout is very focused on practical actionable advice. For example, amongst other lifestyle-adjustment suggestions, the authors make the case for front-loading various kinds of food earlier in the day, and eating more attentively and mindfully when we do eat.
They also offer a lot of “quick tips” of the kind we love here at 10almonds! Ranging from “how about this breakfast idea” to “roasting chickpeas like this makes a great snack” to “this dessert is three healthy foods disguised as a sundae”
All in all, if you’d like a stack of small tweaks that can add up to a big difference in your overall health, this is a book for you.
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Is Dairy Scary?
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Is Dairy Scary?
Milk and milk products are popularly enjoyed as a good source of calcium and vitamin D.
In contrast, critics of dairy products (for medical reasons, rather than ethical, which is another matter entirely and beyond the scope of this article) point to risks of cancer, heart disease, and—counterintuitively—osteoporosis. We’ll focus more on the former, but touch on the latter two before closing.
Dairy & Cancer
Evidence is highly conflicting. There are so many studies with so many different results. This is partially explicable by noting that not only is cancer a many-headed beast that comes in more than a hundred different forms and all or any of them may be affected one way or another by a given dietary element, but also… Not all milk is created equal, either!
Joanna Lampe, of the Public Health Sciences division, Fred Hutchinson Cancer Research Center in Seattle, writes:
❝Dairy products are a complex group of foods and composition varies by region, which makes evaluation of their association with disease risk difficult. For most cancers, associations between cancer risk and intake of milk and dairy products have been examined only in a small number of cohort studies, and data are inconsistent or lacking❞
In her systematic review of studies, she noted, for example, that:
- Milk and dairy products contain micronutrients and several bioactive constituents that may influence cancer risk and progression
- There’s probable association between milk intake and lower risk of colorectal cancer
- There’s a probable association between diets high in calcium and increased risk of prostate cancer
- Some studies show an inverse association between intake of cultured dairy products and bladder cancer (i.e., if you eat yogurt you’re less likely to get bladder cancer)
Since that systemic review was undertaken, more research has been conducted, and the results are… Not conclusive, but converging towards a conclusion:
- Dairy products can increase or decrease cancer risk
- The increase in cancer risk seems strongest when milk is consumed in quantities that result in too much calcium. When it comes to calcium, you can absolutely have too much of a good thing—just ask your arteries!
- The decrease in cancer seems to be mostly, if not exclusively, from fermented dairy products. This usually means yogurts. The benefit here is not from the milk itself, but rather from the gut-friendly bacteria.
You may be wondering: “Hardened arteries, gut microbiome health? I thought we were talking about cancer?” and yes we are. No part of your health is an island unrelated to other parts of your health. One thing can lead to another. Sometimes we know how and why, sometimes we don’t, but it’s best to not ignore the data.
The bottom line on dairy products and cancer is:
- Consuming dairy products in general is probably fine
- Yogurt, specifically, is probably beneficial
Dairy and Heart Disease
The reason for the concern is clear enough: it’s largely assumed to be a matter of saturated fat intake.
The best combination of “large” and “recent” that we found was a three-cohort longitudinal study in 2019, which pretty much confirms what was found in smaller or less recent studies:
- There is some evidence to suggest that consumption of dairy can increase all-cause mortality in general, and death from (cancer and) cardiovascular disease in particular
- The evidence is not, however, overwhelming. It is marginal.
Dairy and Osteoporosis
Does dairy cause osteoporosis? Research here tends to fall into one of two categories when it comes to conclusions, so we’ll give an example of each:
- “Results are conflicting, saying yes/no/maybe, and basically we just don’t know”
- “Results are conflicting, but look: cross-sectional and case-control studies say yes; cohort studies say maybe or no; we prefer the cohort studies”
See them for yourself:
- Osteoporosis: Is milk a kindness or a curse?
- Consumption of milk and dairy products and risk of osteoporosis and hip fracture
Conclusion: really, the jury is very much still out on this one
Summary:
- Moderate consumption of dairy products is almost certainly fine
- More specifically: it probably has some (small) pros and some (small) cons
- Yogurt is almost certainly healthier than other dairy products, and is almost universally considered a healthy food (assuming not being full of added sugar etc, of course)
- If you’re going to have non-dairy alternatives to milk, choose wisely!
That’s all we have time for today, but perhaps in a future edition we’ll do a run-down of the pros and cons of various dairy alternatives!
Don’t Forget…
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