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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Mediterranean Diet… In A Pill?
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Does It Come In A Pill?
For any as yet unfamiliar with the Mediterranean diet, you may be wondering what it involves, beyond a general expectation that it’s a diet popularly enjoyed in the Mediterranean. What image comes to mind?
We’re willing to bet that tomatoes feature (great source of lycopene, by the way, and if you’re not getting lycopene, you’re missing out), but what else?
- Salads, perhaps? Vegetables, olives? Olive oil, yea or nay?
- Bread? Pasta? Prosciutto, salami? Cheese?
- Pizza but only if it’s Romana style, not Chicago?
- Pan-seared liver, with some fava beans and a nice Chianti?
In fact, the Mediterranean diet is quite clear on all these questions, so to read about these and more (including a “this yes, that no” list), see:
What Is The Mediterranean Diet, And What Is It Good For?
So, how do we get that in a pill?
A plucky band of researchers, Dr. Chiara de Lucia et al. (quite a lot of “et al.”; nine listed authors on the study), wondered to what extent the benefits of the Mediterranean diet come from the fact that the Mediterranean diet is very rich in polyphenols, and set about testing that, by putting the same polyphenols in capsule form, and running a randomized, double-blind, placebo-controlled, crossover clinical intervention trial.
Now, polyphenols are not the only reason the Mediterranean diet is great; there are also other considerations, such as:
- a great macronutrient balance with lots of fiber, healthy fats, moderate carbs, and protein from select sources
- the absence or at least very low presence of a lot of harmful substances such as refined seed oils, added sugars, refined carbohydrates, and the like (“but pasta” yes pasta; in moderation and wholegrain and served with extra sources of fiber and healthy fats, all of which slow down the absorption of the carbs)
…but polyphenols are admittedly very important too; we wrote about some common aspects of them here:
Tasty Polyphenols: Enjoy Bitter Foods For Your Heart & Brain
As for what Dr. de Lucia et al. put into the capsule, behold…
The ingredients:
- Apple Extract 10.0%
- Pomegranate Extract 10.0%
- Tomato Powder 2.5%
- Beet, Spray Dried 2.5%
- Olive Extract 7.5%
- Rosemary Extract 7.5%
- Green Coffee Bean Extract (CA) 7.5%
- Kale, Freeze Dried 2.5%
- Onion Extract 10.0%
- Ginger Extract 10.0%
- Grapefruit Extract 2.5%
- Carrot, Air Dried 2.5%
- Grape Skin Extract 17.5%
- Blueberry Extract 2.5%
- Currant, Freeze Dried 2.5%
- Elderberry, Freeze Dried 2.5%
And the relevant phytochemicals they contain:
- Quercetin
- Luteolin
- Catechins
- Punicalagins
- Phloretin
- Ellagic Acid
- Naringin
- Apigenin
- Isorhamnetin
- Chlorogenic Acids
- Rosmarinic Acid
- Anthocyanins
- Kaempferol
- Proanthocyanidins
- Myricetin
- Betanin
And what, you may wonder, did they find? Well, first let’s briefly summarise the setup of the study:
They took volunteers (n=30), average age 67, BMI >25, without serious health complaints, not taking other supplements, not vegetarian or vegan, not consuming >5 cups of coffee per day, and various other stipulations like that, to create a fairly homogenous study group who were expected to respond well to the intervention. In contrast, someone who takes antioxidant supplements, already eats many different color plants per day, and drinks 10 cups of coffee, probably already has a lot of antioxidant activity going on, and someone with a lower BMI will generally have lower resting levels of inflammatory markers, so it’s harder to see a change, proportionally.
About those inflammatory markers: that’s what they were testing, to see whether the intervention “worked”; essentially, did the levels of inflammatory markers go up or down (up is bad; down is good).
For more on inflammation, by the way, see:
How to Prevent (or Reduce) Inflammation
…which also explains what it actually is, and some important nuances about it.
Back to the study…
They gave half the participants the supplement for a week and the other half placebo; had a week’s gap as a “washout”, then repeated it, switching the groups, taking blood samples before and after each stage.
What they found:
The group taking the supplement had lower inflammatory markers after a week of taking it, while the group taking the placebo had relatively higher inflammatory markers after a week of taking it; this trend was preserved across both groups (i.e., when they switched roles for the second half).
The results were very significant (p=0.01 or thereabouts), and yet at the same time, quite modest (i.e. the supplement made a very reliable, very small difference), probably because of the small dose (150mg) and small intervention period (1 week).
What the researchers concluded from this
The researchers concluded that this was a success; the study had been primarily to provide proof of principle, not to rock the world. Now they want the experiment to be repeated with larger sample sizes, greater heterogeneity, larger doses, and longer intervention periods.
This is all very reasonable and good science.
What we conclude from this
That ingredients list makes for a good shopping list!
Well, not the extracts they listed, necessarily, but rather those actual fruits, vegetables, etc.
If nine top scientists (anti-aging specialists, neurobiologists, pharmacologists, and at least one professor of applied statistics) came to the conclusion that to get the absolute most bang-for-buck possible, those are the plants to get the phytochemicals from, then we’re not going to ignore that.
So, take another list above and ask yourself: how many of those 16 foods do you eat regularly, and could you work the others in?
Want to make your Mediterranean diet even better?
While the Mediterranean diet is a top-tier catch-all, it can be tweaked for specific areas of health, for example giving it an extra focus on heart health, or brain health, or being anti-inflammatory, or being especially gut healthy:
Four Ways To Upgrade The Mediterranean
Enjoy!
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How To Recover Quickly From A Stomach Bug
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How To Recover Quickly From A Stomach Bug
Is it norovirus, or did you just eat something questionable? We’re not doctors, let alone your doctors, and certainly will not try to diagnose from afar. And as ever, if unsure and/or symptoms don’t go away or do get worse, seek professional medical advice.
That out of the way, we can give some very good general-purpose tips for this one…
Help your immune system to help you
So far as you can, you want a happy healthy immune system. For the most part, we’d recommend the following things:
Beyond Supplements: The Real Immune-Boosters!
…but you probably don’t want to be exercising with a stomach bug, so perhaps sit that one out. Exercise is the preventative; what you need right now is rest.
Hydrate—but watch out
Hydration is critical for recovery especially if you have diarrhea, but drinking too much water too quickly will just make things worse. Great options for getting good hydration more slowly are:
- Peppermint tea
- (peppermint also has digestion-settling properties)
- Ginger tea
- See also: Ginger Does A Lot More Than You Think
- Broths
- These will also help replenish your sodium and other nutrients, gently. Chicken soup for your stomach, and all that. A great plant-based option is sweetcorn soup.
- By broths, we mean clear(ish) water-based soups. This is definitely not the time for creamier soups.
❝Milk and dairy products should be avoided for 24 to 48 hours as they can make diarrhea worse.
Initial dietary choices when refeeding should begin with soups and broth.❞
Source: American College of Gastroenterology
Other things to avoid
Caffeine stimulates the digestion in a way that can make things worse.
Fat is more difficult to digest, and should also be avoided until feeling better.
To medicate or not to medicate?
Loperamide (also known by the brand name Imodium) is generally safe when used as directed.
Click here to see its uses, dosage, side effects, and contraindications
Antibiotics may be necessary for certain microbial infections, but should not be anyone’s first-choice treatment unless advised otherwise by your doctor/pharmacist.
Note that if your stomach bug is not something that requires antibiotics, then taking antibiotics can actually make it worse as the antibiotics wipe out your gut bacteria that were busy helping fight whatever’s going wrong in there:
- Facing a new challenge: the adverse effects of antibiotics on gut microbiota and host immunity
- Antibiotics as major disruptors of gut microbiota
- Microbiotoxicity: antibiotic usage and its unintended harm to the microbiome
A gentler helper
If you want to give your “good bacteria” a hand while giving pathogens a harder time of it, then a much safer home remedy is a little (seriously, do not over do it; we are talking 1–2 tablespoons, or around 20ml) apple cider vinegar, taken diluted in a glass of water.
❝Several studies indicate apple cider vinegar (ACV)’s usefulness in lowering postprandial glycemic response, specifically by slowing of gastric motility❞
(Slowing gastric motility is usually exactly what you want in the case of a stomach bug, and apple cider vinegar)
See also:
- Antimicrobial activity of apple cider vinegar against Escherichia coli, Staphylococcus aureus and Candida albicans
- Antibacterial apple cider vinegar eradicates methicillin resistant Staphylococcus aureus and resistant Escherichia coli
Take care!
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- Peppermint tea
What’s Your Ikigai?
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Ikigai: A Closer Look
We’ve mentioned ikigai from time to time, usually when discussing the characteristics associated with Blue Zone centenarians, for example as number 5 of…
It’s about finding one’s “purpose”. Not merely a function, but what actually drives you in life. And, if Japanese studies can be extrapolated to the rest of the world, it has a significant and large impact on mortality (other factors being controlled for); not having a sense of ikigai is associated with an approximately 47%* increase in 7-year mortality risk in the categories of cardiovascular disease and external cause mortality:
Sense of life worth living (ikigai) and mortality in Japan: Ohsaki Study
*we did a lot of averaging and fuzzy math to get this figure; the link will show you the full stats though!
In case that huge (n=43,391) study didn’t convince you, here’s another comparably-sized (n=43,117) one that found similarly, albeit framing the numbers the other way around, i.e. a comparable decrease in mortality risk for having a sense of ikigai:
This study was even longer (12 years rather than 7), so the fact that it found pretty much the same results the 7-year study we cited just before is quite compelling evidence. Again, multivariate hazard ratios were adjusted for age, BMI, drinking and smoking status, physical activity, sleep duration, education, occupation, marital status, perceived mental stress, and medical history—so all these things were effectively controlled for statistically.
Three kinds of ikigai
There are three principal kinds of ikigai:
- Social ikigai: for example, a caring role in the family or community, volunteer work, teaching
- Asocial ikigai: for example, a solitary practice of self-discipline, spirituality, or study without any particular intent to teach others
- Antisocial ikigai: for example, a strong desire to outlive an enemy, or to harm a person or group that one hates
You may be thinking: wait, aren’t those last things bad?
And… Maybe! But ikigai is not a matter of morality or even about “warm fuzzy feelings”. The fact is, having a sense of purpose increases longevity regardless of moral implications or niceness.
Nevertheless, for obvious reasons there is a lot more focus on the first two categories (social and asocial), and of those, especially the first category (social), because on a social level, “we all do well when we all do well”.
We exemplified them above, but they can be defined:
- Social: working for the betterment of society
- Asocial: working for the betterment of oneself
Of course, for many people, the same ikigai may cover both of those—often somebody who excels at something for its own sake and/but shares it with others to enrich their lives also, for example a teacher, an artist, a scientist, etc.
For it to cover both, however, requires that both parts of it are genuinely part of their feeling of ikigai, and not merely unintended consequences.
For example, a piano teacher who loves music in general and the piano in particular, and would gladly spend every waking moment studying/practising/performing, but hates having to teach it, but needs to pay the bills so teaches it anyway, cannot be said to be living any kind of social ikigai there, just asocial. And in fact, if teaching the piano is causing them to not have the time or energy to pursue it for its own sake, they might not even be living any ikigai at all.
One other thing to watch out for
There is one last stumbling block, which is that while we can find ikigai, we can also lose it! Examples of this may include:
- A professional whose job is their ikigai, until they face mandatory retirement or are otherwise unable to continue their work (perhaps due to disability, for example)
- A parent whose full-time-parent role is their ikigai, until their children leave for school, university, life in general
- A married person whose “devoted spouse” role is their ikigai, until their partner dies
For this reason, people of any age can have a “crisis of identity” that’s actually more of a “crisis of purpose”.
There are two ways of handling this:
- Have a back-up ikigai ready! For example, if your profession is your ikigai, maybe you have a hobby waiting in the wings, that you can smoothly jump ship to upon retirement.
- Embrace the fluidity of life! Sometimes, things don’t happen the way we expect. Sometimes life’s surprises can trip us up; sometimes they can leave us a sobbing wreck. But so long as life continues, there is an opportunity to pick ourselves up and decide where to go from that point. Note that this is not fatalism, by the way, it doesn’t have to be “this bad thing happened so that we could find this good thing, so really it was a good thing all along”. Rather, it can equally readily be “well, we absolutely did not want that bad thing to happen, but since it did, now we shall take it this way from here”.
For more on developing/maintaining psychological resilience in the face of life’s less welcome adversities, see:
Psychological Resilience Training
…and:
Putting The Abs Into Absurdity ← do not underestimate the power of this one
Take care!
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The Truth About Chocolate & Skin Health
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
❝What’s the science on chocolate and acne? Asking for a family member❞
The science is: these two things are broadly unrelated to each other.
There was a very illustrative study done specifically for this, though!
❝65 subjects with moderate acne ate either a bar containing ten times the amount of chocolate in a typical bar, or an identical-appearing bar which contained no chocolate. Counting of all the lesions on one side of the face before and after each ingestion period indicated no difference between the bars.
Five normal subjects ingested two enriched chocolate bars daily for one month; this represented a daily addition of the diet of 1,200 calories, of which about half was vegetable fat. This excessive intake of chocolate and fat did not alter the composition or output of sebum.
A review of studies purporting to show that diets high in carbohydrate or fat stimulate sebaceous secretion and adversely affect acne vulgaris indicates that these claims are unproved.❞
Source: Effect of Chocolate on Acne Vulgaris
As for what might help against acne more than needlessly abstaining from chocolate:
Why Do We Have Pores, And Could We Not?
…as well as:
Of Brains & Breakouts: The Neuroscience Of Your Skin
And here are some other articles that might interest you about chocolate:
- Chocolate & Health: Fact or Fiction?
- The “Love Drug”: Get PEA-Brained!
- Enjoy Bitter Foods For Your Heart & Brain
Enjoy! And while we have your attention… Would you like this section to be bigger? If so, send us more questions!
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Gravitas – by Caroline Goyder
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A no-nonsense guide to (more than!) public speaking that isn’t just “tell jokes in your speech and imagine the audience naked”.
Because this isn’t just about speech-writing or speech delivery, so much as giving you important life skills. The kind that weren’t taught in school, but that nevertheless make a huge impact on success… whether you’re giving a presentation or hosting a party or negotiating a deal or just attending a social event. Or making a phonecall, even.
Whereas a lot of books of this kind treat “the audience” as a nebulous and purely responsive passive crowd of extras, Goyder does better. People are individuals, even if they’re all facing the same way for a moment. She works with that! She also teaches how to deal with not just hecklers, but also simply those people who sap your confidence and find fault with you and anything you do or say.b
Bottom line is: if you for whatever reason communicate with people, and would like them to think better of you, this is the book for you.
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Chaga Mushrooms’ Immune & Anticancer Potential
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What Do Chaga Mushrooms Do?
Chaga mushrooms, which also go by other delightful names including “sterile conk trunk rot” and “black mass”, are a type of fungus that grow on birch trees in cold climates such as Alaska, Northern Canada, Northern Europe, and Siberia.
They’ve enjoyed a long use as a folk remedy in Northern Europe and Siberia, mostly to boost immunity, mostly in the form of a herbal tea.
Let’s see what the science says…
Does it boost the immune system?
It definitely does if you’re a mouse! We couldn’t find any studies on humans yet. But for example:
- Immunomodulatory Activity of the Water Extract from Medicinal Mushroom Inonotus obliquus
- Inonotus obliquus extracts suppress antigen-specific IgE production through the modulation of Th1/Th2 cytokines in ovalbumin-sensitized mice
(cytokines are special proteins that regulate the immune system, and Chaga tells them to tell the body to produce more white blood cells)
Wait, does that mean it increases inflammation?
Definitely not if you’re a mouse! We couldn’t find any studies on humans yet. But for example:
- Anti-inflammatory effects of orally administered Inonotus obliquus in ulcerative colitis
- Orally administered aqueous extract of Inonotus obliquus ameliorates acute inflammation
Anti-inflammatory things often fight cancer. Does chaga?
Definitely if you’re a mouse! We couldn’t find any studies in human cancer patients yet. But for example:
While in vivo human studies are conspicuous by their absence, there have been in vitro human studies, i.e., studies performed on cancerous human cell samples in petri dishes. They are promising:
- Anticancer activities of extracts and compounds from the mushroom Inonotus obliquus
- Extract of Innotus obliquus induces G1 cell cycle arrest in human colon cancer cells
- Anticancer activity of Inonotus obliquus extract in human cancer cells
I heard it fights diabetes; does it?
You’ll never see this coming, but: definitely if you’re a mouse! We couldn’t find any human studies yet. But for example:
- Anti-diabetic effects of Inonotus obliquus in type 2 diabetic mice
- Anti-diabetic effects of Inonotus obliquus in type 2 diabetic mice and potential mechanism
Is it safe?
Honestly, there simply have been no human safety studies to know for sure, or even to establish an appropriate dosage.
Its only-partly-understood effects on blood sugar levels and the immune system may make it more complicated for people with diabetes and/or autoimmune disorders, and such people should definitely seek medical advice before taking chaga.
Additionally, chaga contains a protein that can prevent blood clotting. That might be great by default if you are at risk of blood clots, but not so great if you are already on blood-thinning medication, or otherwise have a bleeding disorder, or are going to have surgery soon.
As with anything, we’re not doctors, let alone your doctors, so please consult yours before trying chaga.
Where can we get it?
We don’t sell it (or anything else), but for your convenience, here’s an example product on Amazon.
Enjoy!
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Learn to Age Gracefully
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