Should We Skip Shampoo?
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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 😎
❝What’s the science on “no poo”? Is it really better for hair? There are so many mixed reports out there.❞
First, for any unfamiliar: this is not about constipation; rather, it is about skipping shampoo, and either:
- Using an alternative cleaning agent, such as vinegar and/or sodium bicarbonate
- Using nothing at all, just conditioner when wet and brushing when dry
Let’s examine why the trend became a thing: the thinking went “shampoo does not exist in nature, and most of our body is more or less self-cleaning; shampoos remove oils from hair, and the body has to produce more sebum to compensate, resulting in a rapid cycle of dry and greasy hair”.
Now let’s fact-check each of those:
- shampoo does not exist in nature: true (except in the sense that everything that exists can be argued to exist in nature, since nature encompasses everything—but the point is that shampoo is a purely artificial human invention)
- most of our body is more or less self-cleaning: true, but our hair is not, for the same reason our nails are not: they’re not really a living part of the overall organism that is our body, so much as a keratinous protrusion of neatly stacked and hardened dead cells from our body. Dead things are not self-cleaning.
- shampoos remove oils from hair: true; that is what they were invented for and they do it well
- the body has to produce more sebum to compensate, resulting in a rapid cycle of dry and greasy hair: false; or at least, there is no evidence for this.
Our hair’s natural oils are great at protecting it, and also great at getting dirt stuck in it. For the former reason we want the oil there; for the latter reason, we don’t.
So the trick becomes: how to remove the oil (and thus the dirt stuck in it) and then put clean oil back (but not too much, because we don’t want it greasy, just, shiny and not dry)?
The popular answer is: shampoo to clean the hair, conditioner to put an appropriate amount of oil* back.
*these days, mostly not actually oil, but rather silicon-based substitutes, that do the same job of protecting hair and keeping it shiny and not brittle, without attracting so much dirt. Remember also that silicon is inert and very body safe; its molecules are simply too large to be absorbed, which is why it gets used in hair products, some skin products, and lube.
See also: Water-based Lubricant vs Silicon-based Lubricant – Which is Healthier?
If you go “no poo”, then what will happen is either you dry your hair out much worse by using vinegar or (even worse) bicarbonate of soda, or you just have oil (and any dirt stuck in it) in your hair for the life of the hair. As in, each individual strand of hair has a lifespan, and when it falls out, the dirt will go with it. But until that day, it’s staying with you, oil and dirt and all.
If you use a conditioner after using those “more natural” harsh cleaners* that aren’t shampoo, then you’ll undo a lot of the damage done, and you’ll probably be fine.
*in fact, if you’re going to skip shampoo, then instead of vinegar or bicarbonate of soda, dish soap from your kitchen may actually do less damage, because at least it’s pH-balanced. However, please don’t use that either.
If you’re going to err one way or the other with regard to pH though, erring on the side of slightly acidic is much better than slightly alkaline.
More on pH: Journal of Trichology | The Shampoo pH can Affect the Hair: Myth or Reality?
If you use nothing, then brushing a lot will mitigate some of the accumulation of dirt, but honestly, it’s never going to be clean until you clean it.
Our recommendation
When your hair seems dirty, and not before, wash it with a simple shampoo (most have far too many unnecessary ingredients; it just needs a simple detergent, and the rest is basically for marketing; to make it foam completely unnecessarily but people like foam, to make it thicker so it feels more substantial, to make it smell nice, to make it a color that gives us confidence it has ingredients in it, etc).
Then, after rinsing, enjoy a nice conditioner. Again there are usually a lot of unnecessary ingredients, but an argument can be made this time for some being more relevant as unlike with the shampoo, many ingredients are going to remain on your hair after rinsing.
Between washes, if you have long hair, consider putting some hair-friendly oil (such as argan oil or coconut oil) on the tips daily, to avoid split ends.
And if you have tight curly hair, then this advice goes double for you, because it takes a lot longer for natural oils to get from your scalp to the ends of your hair. For those of us with straight hair, it pretty much zips straight on down there within a day or two; not so if you have beautiful 4C curls to take care of!
For more on taking care of hair gently, check out:
Gentler Hair Care Options, According To Science
Take care!
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Macadamia Nuts vs Brazil Nuts – Which is Healthier?
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Our Verdict
When comparing macadamia nuts to Brazil nuts, we picked the Brazil nuts.
Why?
They’re a lot more nutrient dense! But watch out…
First, to do due diligence in terms of macros: Brazil nuts have twice as much protein and less fat, as well as being a little higher in fiber and slightly lower in carbs.
In terms of vitamins, Brazil nuts are about 10x higher in vitamin E, while macadamias are somewhat higher in several B-vitamins.
The category of minerals is where it gets interesting. Macadamia nuts are a little higher in iron and considerably higher in Manganese. But… Brazil nuts are a lot higher in calcium, copper, magnesium, phosphorus, potassium, selenium, and zinc.
About that selenium… Specifically, it’s more than 5,000x higher, and a cup of Brazil nuts would give nearly 10,000x the recommended daily amount of selenium. Now, selenium is an essential mineral (needed for thyroid hormone production, for example), and at the RDA it’s good for good health. Your hair will be luscious and shiny. However, go much above that, and selenium toxicity becomes a thing, you may get sick, and it can cause your (luscious and shiny) hair to fall out. For this reason, it’s recommended to eat no more than 3–4 Brazil nuts per day.
In short… Brazil nuts are much more nutrient dense in general, and thus come out on top here. But, they’re so nutrient dense in the case of selenium, that careful moderation is advised.
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
Take care!
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On This Bright Day – by Dr. Susan Thompson
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This book is principally aimed at those who have struggled with emotional/comfort eating, over-eating, and/or compulsive eating of some kind.
However, its advices go for the “little compulsions” too, the many small unhealthy choices that add up. Thus, this book has value for most if not all of us.
The format is: each day has a little quotation, followed by a short discussion of that, which is then underlined by an affirmation for the day.
The main thrust of the book is to promote mindful eating, and it does this well with daily reminders that are helpful without being preachy.
Bottom line: if you enjoy “daily reader” type books and would like a daily reminder to practice mindful eating, then this book is for you!
Click here to check out On This Bright Day, and enjoy your food mindfully, every day!
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Glucose Revolution – by Jessie Inchauspé
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While we all know that keeping balanced blood sugars is important for all us (be we diabetic, pre-diabetic, or not at all), it can be a mystifying topic!
Beyond a generic “sugar is bad”…
- What does it all mean and how does it all work?
- Should we go low-carb?
- What’s the deal with fruit?
- Carbs or protein for breakfast?
- Is “quick energy” ever a good thing?
- How do starches weigh in again?
It’s all so confusing!
Happily, Jessie Inchauspé has the incredible trifecta of qualifications to help us: she’s a biochemist, a keen cook, and a great educator. What we mean by this latter is:
Instead of dry textbook explanations, or “trust me” hand-waives, she explains biochemistry in a clear, simple, digestible (if you’ll pardon the pun) way with very helpful diagrams what things cause (or flatten) blood sugar spikes and how and why. If you read this book, you will understand, without guesswork or gaps, exactly what is happening on a physical level, and why and how her “10 hacks” work.
Her “10 hacks” are explained so thoroughly that each gets a chapter of its own, but we’ll not keep them a mystery from you meanwhile, they are:
- Eat foods in the right order
- Add a green starter to your meals
- Stop counting calories
- Flatten your breakfast curve
- Have any type of sugar you like—they’re all the same
- Pick dessert over a sweet snack
- Reach for the vinegar before you eat
- After you eat, move
- If you have to snack, go savoury
- Put some clothes on your carbs
She then finishes up with a collection of handy cheat-sheets and some of her own recipes.
Bottom line: this isn’t just a “how-to” book. It gives the how-to, yes, but it also gives such good explanations that you’ll never be confused again by what’s going on in your glucose-related health.
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Can You Repair Your Own Teeth At Home?
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
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 liked your article on tooth remineralization, I saw a “home tooth repair kit”, and wondered if it is as good as what dentists do, or at least will do the job well enough to save a dentist visit?❞
Firstly, for any wondering about the tooth remineralization, here you go:
Tooth Remineralization: How To Heal Your Teeth Naturally
Now, to answer your question, we presume you are talking about something like this kit available on Amazon. In which case, some things to bear in mind:
- This kind of thing is generally intended as a stop-gap measure until you see a dentist, because you cracked your tooth or lost a filling or something today, and will see the dentist next week, say.
- This kind of thing is not what Dr. Michelle Jorgensen was talking about in another video* that we wrote about; rather, it is using a polymer filler to rebuild what is missing. The key difference is: this is using plastic, which is not what your teeth are made of, so it will never “take” as part of the tooth, as some biomimetic dentistry options can do.
- Yes, this does also mean you are putting microplastics (because the powder is usually micronized polymer beads with zinc oxide, to which you add a liquid to create a paste that will set) in your mouth and quite possibly right next to an open blood supply depending on what’s damaged and whether capillaries were reaching it.
- Because of the different material and application method, the adhesion is nothing like professional fillings (be they metal or resin), and thus the chances of it coming out again or so high that it’s more a question of when, rather than if.
- If you have damage under there (as we presume you do in any scenario where you are using this), then if it’s not professionally cleaned before the filling goes in, then it can get infected, and (less dramatically, but still importantly) any extant decay can also get worse. We say “professionally”, because you will not be able to do an adequate job with your toothbrush, floss, etc at home, and even if you got dentist’s tools (which you can buy, by the way, but we don’t recommend), you will no more be able to do the same quality job as a dentist who has done that many times a day every day for the past 20 years, as buying expensive paintbrushes would make you able to restore a Renaissance painting without messing it up.
*See: Dangers Of Root Canals And Crowns, & What To Do Instead ← what she recommends instead is biomimetic dentistry, which is also more prosaically called “conservative restorative dentistry”, i.e. it tries to conserve as much as possible, replace lost material on a like-for-like basis, and generally end up with a result that’s as close to natural as possible.
In other words, the short answer to your question is “no, sorry, it isn’t and it won’t”
However! A just like it’s good to have a first aid kit in the house even if it won’t do the same job as an ambulance crew, it can be good to have a tooth repair kit (essentially, a tooth first-aid kit) in the house, precisely to use it just as a stop-gap measure in the event that you one day crack a tooth or lose a filling or such, and don’t want to leave it open to all things in the meantime.
(The results of this sort of kit are so not long-term in nature that it will be quick and easy for your dentist to remove it to do their own job once you get there)
If in doubt, always see your dentist as soon as possible, as many things are a lot less work to treat now, than to treat later. Just, make sure to advocate for yourself and what you actually want/need, and don’t let them upsell you on something you didn’t come in for while you’re sitting in their chair—that’s a conversation to be had in advance with a clear head and no pressure (and nobody’s hands in your mouth)!
See also: Dentists Are Pulling ‘Healthy’ and Treatable Teeth To Profit From Implants, Experts Warn
Take care!
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Do We Need Supplements, And Do They Work?
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Does our diet need a little help?
We asked you for your take on supplements, and got the above-illustrated, below-described set of results.
- The largest minority of respondents (a little over a third) voted for “I just take something very specific”
- The next most respondents voted for “I take so many supplements; every little helps!”
- Almost as many voted for “I just take a vitamin or two / a multivitamin”
- Fewest, about 8%, voted for “I get everything I need from my diet”
But what does the science say?
Food is less nutritious now than it used to be: True or False?
True or False depending on how you measure it.
An apple today and an apple from a hundred years ago are likely to contain the same amounts of micronutrients per apple, but a lower percentage of micronutrients per 100g of apple.
The reason for this is that apples (and many other food products; apples are just an arbitrary example) have been selectively bred (and in some cases, modified) for size, and because the soil mineral density has remained the same, the micronutrients per apple have not increased commensurate to the increase in carbohydrate weight and/or water weight. Thus, the resultant percentage will be lower, despite the quantity remaining the same.
We’re going to share some science on this, and/but would like to forewarn readers that the language of this paper is a bit biased, as it looks to “debunk” claims of nutritional values dropping while skimming over “yes, they really have dropped percentage-wise” in favor of “but look, the discrete mass values are still the same, so that’s just a mathematical illusion”.
The reality is, it’s no more a mathematical illusion than is the converse standpoint of saying the nutritional value is the same, despite the per-100g values dropping. After all, sometimes we eat an apple as-is; sometimes we buy a bag of frozen chopped fruit. That 500g bag of chopped fruit is going to contain less copper (for example) than one from decades past.
Here’s the paper, and you’ll see what we mean:
Supplements aren’t absorbed properly and thus are a waste of money: True or False?
True or False depending on the supplement (and your body, and the rest of your diet)
Many people are suffering from dietary deficiencies of vitamins and minerals, that could be easily correctable by supplementation:
However, as this study by Dr. Fang Fang Zhang shows, a lot of vitamin and mineral supplementation does not appear to have much of an effect on actual health outcomes, vis-à-vis specific diseases. She looks at:
- Cardiovascular disease
- Cancer
- Type 2 diabetes
- Osteoporosis
Her key take-aways from this study were:
- Randomised trial evidence does not support use of vitamin, mineral, and fish oil supplements to reduce the risk of non-communicable diseases
- People using supplements tend to be older, female, and have higher education, income, and healthier lifestyles than people who do not use them
- Use of supplements appreciably reduces the prevalence of inadequate intake for most nutrients but also increases the prevalence of excess intake for some nutrients
- Further research is needed to assess the long term effects of supplements on the health of the general population and in individuals with specific nutritional needs, including those from low and middle income countries
Read her damning report: Health effects of vitamin and mineral supplements
On the other hand…
This is almost entirely about blanket vitamin-and-mineral supplementation. With regard to fish oil supplementation, many commercial fish oil supplements break down in the stomach rather than the intestines, and don’t get absorbed well. Additionally, many people take them in forms that aren’t pleasant, and thus result in low adherence (i.e., they nominally take them, but in fact they just sit on the kitchen counter for a year).
One thing we can conclude from this is that it’s good to check the science for any given supplement before taking it, and know what it will and won’t help for. Our “Monday Research Review” editions of 10almonds do this a lot, although we tend to focus on herbal supplements rather than vitamins and minerals.
We can get everything we need from our diet: True or False?
Contingently True (but here be caveats)
In principle, if we eat the recommended guideline amounts of various macro- and micro-nutrients, we will indeed get all that we are generally considered to need. Obviously.
However, this may come with:
- Make sure to get enough protein… Without too much meat, and also without too much carbohydrate, such as from most plant sources of protein
- Make sure to get enough carbohydrates… But only the right kinds, and not too much, nor at the wrong time, and without eating things in the wrong order
- Make sure to get enough healthy fats… Without too much of the unhealthy fats that often exist in the same foods
- Make sure to get the right amount of vitamins and minerals… We hope you have your calculators out to get the delicate balance of calcium, magnesium, potassium, phosphorus, and vitamin D right.
That last one’s a real pain, by the way. Too much or too little of one or another and the whole set start causing problems, and several of them interact with several others, and/or compete for resources, and/or are needed for the others to do their job.
And, that’s hard enough to balance when you’re taking supplements with the mg/µg amount written on them, never mind when you’re juggling cabbages and sardines.
On the topic of those sardines, don’t forget to carefully balance your omega-3, -6, and -9, and even within omega-3, balancing ALA, EPA, and DHA, and we hope you’re juggling those HDL and LDL levels too.
So, when it comes to getting everything we need from our diet, for most of us (who aren’t living in food deserts and/or experiencing food poverty, or having a medical condition that restricts our diet), the biggest task is not “getting enough”, it’s “getting enough of the right things without simultaneously overdoing it on the others”.
With supplements, it’s a lot easier to control what we’re putting in our bodies.
And of course, unless our diet includes things that usually can’t be bought in supermarkets, we’re not going to get the benefits of taking, as a supplement, such things as:
Etc.
So, there definitely are supplements with strong science-backed benefits, that probably can’t be found on your plate!
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Quit Drinking – by Rebecca Dolton
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Many “quit drinking” books focus on tips you’ve heard already—cut down like this, rearrange your habits like that, make yourself accountable like so, add a reward element this way, etc.
Dolton takes a different approach.
She focuses instead on the underlying processes of addiction, so as to not merely understand them to fight them, but also to use them against the addiction itself.
This is not just a social or behavioral analysis, by the way, and goes into some detail into the physiological factors of the addiction—including such things as the little-talked about relationship between addiction and gut flora. Candida albans, found in most if not all humans to some extent, gets really out of control when given certain kinds of sugars (including those from alcohol); it grows, eventually puts roots through the intestinal walls (ouch!) and the more it grows, the more it demands the sugars it craves, so the more you feed it.
Quite a motivator to not listen to such cravings! It’s not even you that wants it, it’s the Candida!
Anyway, that’s just one example; there are many. The point here is that this is a well-researched, well-written book that sets itself apart from many of its genre.
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