Castor Oil: All-Purpose Life-Changer, Or Snake Oil?
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As “trending” health products go, castor oil is enjoying a lot of popularity presently, lauded as a life-changing miracle-worker, and social media is abuzz with advice to put it everywhere from your eyes to your vagina.
But:
- what things does science actually say it’s good for,
- what things lack evidence, and
- what things go into the category of “wow definitely do not do that”?
We don’t have the space to go into all of its proposed uses (there are simply far too many), but we’ll examine some common ones:
To heal/improve the skin barrier
Like most oils, it’s functional as a moisturizer. In particular, its high (90%!) ricinoleic fatty acid content does indeed make it good at that, and furthermore, has properties that can help reduce skin inflammation and promote wound healing:
Bioactive polymeric formulations for wound healing ← there isn’t a conveniently quotable summary we can just grab here, but you can see the data and results, from which we can conclude:
- formulations with ricinoleic acid (such as with castor oil) performed very well for topical anti-inflammatory purposes
- they avoided the unwanted side effects associated with some other contenders
- they consistently beat other preparations in the category of wound-healing
To support hair growth and scalp health
There is no evidence that it helps. We’d love to provide a citation for this, but it’s simply not there. There’s also no evidence that it doesn’t help. For whatever reason, despite its popularity, peer-reviewed science has simply not been done for this, or if it has, it wasn’t anywhere publicly accessible.
It’s possible that if a person is suffering hair loss specifically as a result of prostaglandin D2 levels, that ricinoleic acid will inhibit the PGD2, reversing the hair loss, but even this is hypothetical so far, as the science is currently only at the step before that:
However, due to some interesting chemistry, the combination of castor oil and warm water can result in acute (and irreversible) hair felting, in other words, the strands of hair suddenly glue together to become one mass which then has to be cut off:
“Castor Oil” – The Culprit of Acute Hair Felting
👆 this is a case study, which is generally considered a low standard of evidence (compared to high-quality Randomized Controlled Trials as the highest standard of evidence), but let’s just say, this writer (hi, it’s me) isn’t risking her butt-length hair on the off-chance, and doesn’t advise you to, either. There are other hair-oils out there; argan oil is great, coconut oil is totally fine too.
As a laxative
This time, there’s a lot of evidence, and it’s even approved for this purpose by the FDA, but it can be a bit too good, insofar as taking too much can result in diarrhea and uncomfortable cramping (the cramps are a feature not a bug; the mechanism of action is stimulatory, i.e. it gets the intestines squeezing, but again, it can result in doing that too much for comfort):
Castor Oil: FDA-Approved Indications
To soothe dry eyes
While putting oil in your eyes may seem dubious, this is another one where it actually works:
❝Castor oil is deemed safe and tolerable, with strong anti-microbial, anti-inflammatory, anti-nociceptive, analgesic, antioxidant, wound healing and vasoconstrictive properties.
These can supplement deficient physiological tear film lipids, enabling enhanced lipid spreading characteristics and reducing aqueous tear evaporation.
Studies reveal that castor oil applied topically to the ocular surface has a prolonged residence time, facilitating increased tear film lipid layer thickness, stability, improved ocular surface staining and symptoms.❞
Source: Therapeutic potential of castor oil in managing blepharitis, meibomian gland dysfunction and dry eye
Against candidiasis (thrush)
We couldn’t find science for (or against) castor oil’s use against vaginal candidiasis, but here’s a study that investigated its use against oral candidiasis:
…in which castor oil was the only preparation that didn’t work against the yeast.
Summary
We left a lot unsaid today (so many proposed uses, it feels like a shame to skip them), but in few words: it’s good for skin (including wound healing) and eyes; but we’d give it a miss for hair, candidiasis, and digestive disorders.
Want to try some?
We don’t sell it, but here for your convenience is an example product on Amazon 😎
Take care!
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Eggplant vs Tomato – Which is Healthier?
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Our Verdict
When comparing eggplant to tomato, we picked the eggplant.
Why?
Both have their merits! But…
In terms of macros, eggplant has nearly 3x the fiber, as well as slightly more carbs and protein, making it the most nutritionally dense option in the macros category.
In the category of vitamins, eggplant has more of vitamins B1, B2, B3, B5, B6, B9, and choline, while tomatoes have more of vitamins A, C, E, and K. So, very different vitamin coverage from each one, and/but by the numbers, eggplant wins.
When it comes to minerals, eggplant has more copper, magnesium, manganese, and selenium, while tomatoes have more calcium and iron. The margins of difference are very small in all cases, and they’re equal in phosphorus, potassium, and zinc. So this one’s very close, but by the numbers, eggplant scrapes a marginal victory.
Looking at phytochemicals, they’re about equal on polyphenols, though it’s worth mentioning that tomatoes are a famously good source of lycopene, which isn’t a polyphenol, but it is a very beneficial carotenoid, so we’ll say tomatoes get the win this round.
Adding up the sections, though, makes for an overall win for eggplant, but tomatoes are great too, and mostly in different ways than eggplant, which makes them extra good to enjoy together (salad, ratatouille, etc) for their very complementary health benefits!
Want to learn more?
You might like:
Lycopene’s Benefits For The Gut, Heart, Brain, & More
Enjoy!
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Buckwheat vs Rye – Which is Healthier?
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Our Verdict
When comparing buckwheat to rye, we picked the buckwheat.
Why?
Both are good, wholegrain options for most people! On which note, yes, we are comparing whole groats* vs whole grains here, respectively.
*buckwheat is, you may remember, a flowering plant and not technically a grain or even a grass (and is very unrelated to wheat; it’s as closely related to wheat as a lionfish is to a lion).
In terms of macros, buckwheat has more protein, while rye has more carbs and fiber, the ratios of which mean that rye has the higher glycemic index. All in all, we’re calling this category a win for buckwheat on the basis of those things, but really, both are fine.
When it comes to vitamins, buckwheat has more of vitamins B1, B3, B6, B7, B9, K, and choline, while rye has more of vitamins B2, B5, and E. An easy win for buckwheat here.
In the category of minerals, buckwheat has more copper, calcium, iron, magnesium, phosphorus, potassium, and zinc, while rye has more manganese and selenium. Another clear win for buckwheat.
Lastly. it’s worth noting that while buckwheat does not contain gluten, rye does. So, if you’re avoiding gluten, buckwheat is the option to choose here for that reason too.
If you don’t have celiac disease, wheat allergy, gluten intolerance, or something like that, then rye is still very worthwhile; buckwheat may have won on numbers in each category, but rye wasn’t far behind on anything; the margins of difference were quite small today.
Still, buckwheat is the best all-rounder here!
Want to learn more?
You might like to read:
- Grains: Bread Of Life, Or Cereal Killer?
- Gluten: What’s The Truth?
- Eat More (Of This) For Lower Blood Pressure
Take care!
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The Cancer Code − by Dr. William Fung
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We have previously reviewed, by the same author, “The Obesity Code” and “The Diabetes Code”, so, what does this one offer that’s new?
Mostly, it’s just a new focus, because the dietary approach is basically the same (because all three are fundamentally metabolism-related), with some small tweaks for cancer-specificity. If you’ve read one or more of the other books, you can probably comfortably get away with skipping this one, unless you or a loved one presently has cancer and you’re doing your best to squeeze out any extra 1% of anticancer potential.
Indeed, the former two books assumed that you are affected by obesity or diabetes, respectively, and this one assumes you are at least particularly concerned by cancer—he doesn’t assume you have it (although he does cover that too); he assumes however that you perhaps have a known risk factor or some other similar reason to be focusing on this.
To oversimplify a lot, the dietary approach recommended involves practising intermittent fasting, and also adjusting one’s diet to reduce fasting blood sugar levels and postprandial (after eating) blood sugar and insulin levels. Shocking nobody, he advocates for a lot of plants; he does however recommend a moderately low-carb diet (e.g. legumes are fine but maybe skip the fries).
The style is on the hard end of pop-science, while still quite readable provided one takes one’s time, and there are more than 30 pages of scientific references.
Bottom line: if you’d like to make your diet as anticancer as possible, this book will show you how.
Click there to check out The Cancer Code, and eat to beat cancer!
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Healing After Loss – by Martha Hickman
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Mental health is also just health, and this book’s about an underexamined area of mental health. We say “underexamined”, because for something that affects almost everyone sooner or later, there’s not nearly so much science being done about it as other areas of mental health.
This is not a book of science per se, but it is a very useful one. The format is:
Each calendar day of the year, there’s a daily reflection, consisting of:
- A one-liner insight about grief, quoted from somebody
- A page of thoughts about this
- A one-liner summary, often formulated as a piece of advice
The book is not religious in content, though the author does occasionally make reference to God, only in the most abstract way that shouldn’t be offputting to any but the most stridently anti-religious readers.
Bottom line: if this is a subject near to your heart, then you will almost certainly benefit from this daily reader.
Click here to check out Healing After Loss, and indeed heal after loss
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Do Try This At Home: The 12-Week Brain Fitness Program
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12 Weeks To Measurably Boost Your Brain
This is Dr. Majid Fotuhi. From humble beginnings (being smuggled out of Iran in 1980 to avoid death in the war), he went on (after teaching himself English, French, and German, hedging his bets as he didn’t know for sure where life would lead him) to get his MD from Harvard Medical School and his PhD in neuroscience from Johns Hopkins University. Since then, he’s had a decades-long illustrious career in neurology and neurophysiology.
What does he want us to know?
The Brain Fitness Program
This is not, by the way, something he’s selling. Rather, it was a landmark 12-week study in which 127 people aged 60–80, of which 63% female, all with a diagnosis of mild cognitive impairment, underwent an interventional trial—in other words, a 12-week brain fitness course.
After it, 84% of the participants showed statistically significant improvements in cognitive function.
Not only that, but of those who underwent MRI testing before and after (not possible for everyone due to practical limitations), 71% showed either no further deterioration of the hippocampus, or actual growth above the baseline volume of the hippocampus (that’s good, and it means functionally the memory center of the brain has been rejuvenated).
You can read a little more about the study here:
As for what the program consisted of, and what Dr. Fotuhi thus recommends for everyone…
Cognitive stimulation
This is critical, so we’re going to spend most time on this one—the others we can give just a quick note and a pointer.
In the study this came in several forms and had the benefit of neurofeedback technology, but he says we can replicate most of the effects by simply doing something cognitively stimulating. Whatever challenges your brain is good, but for maximum effect, it should involve the language faculties of the brain, since these are what tend to get hit most by age-related cognitive decline, and are also what tends to have the biggest impact on life when lost.
If you lose your keys, that’s an inconvenience, but if you can’t communicate what is distressing you, or understand what someone is explaining to you, that’s many times worse—and that kind of thing is a common reality for many people with dementia.
To keep the lights brightly lit in that part of the brain: language-learning is good, at whatever level suits you personally. In other words: there’s a difference between entry-level Duolingo Spanish, and critically analysing Rumi’s poetry in the original Persian, so go with whatever is challenging and/but accessible for you—just like you wouldn’t go to the gym for the first time and try to deadlift 500lbs, but you also probably wouldn’t do curls with the same 1lb weights every day for 10 years.
In other words: progressive overloading is key, for the brain as well as for muscles. Start easy, but if you’re breezing through everything, it’s time to step it up.
If for some reason you’re really set against the idea of learning another language, though, check out:
Reading As A Cognitive Exercise ← there are specific tips here for ensuring your reading is (and remains) cognitively beneficial
Mediterranean diet
Shocking nobody, this is once again recommended. You might like to check out the brain-healthy “MIND” tweak to it, here:
Four Ways To Upgrade The Mediterranean Diet ← it’s the fourth one
Omega-3 supplementation
Nothing complicated here. The brain needs a healthy balance of these fatty acids to function properly, and most people have an incorrect balance (too little omega-3 for the omega-6 present):
What Omega-3 Fatty Acids Really Do For Us ← scroll to “against cognitive decline”
Increasing fitness
There’s a good rule of thumb: what’s healthy for your heart, is healthy for your brain. This is because, like every other organ in your body, the brain does not function well without good circulation bringing plenty of oxygen and nutrients, which means good cardiovascular health is necessary. The brain is extra sensitive to this because it’s a demanding organ in terms of how much stuff it needs delivering via blood, and also because of the (necessary; we’d die quickly and horribly without it) impediment of the blood-brain barrier, and the possibility of beta-amyloid plaques and similar woes (they will build up if circulation isn’t good).
How To Reduce Your Alzheimer’s Risk ← number two on the list here
Practising mindfulness medication
This is also straightforward, but not to be underestimated or skipped over:
No-Frills, Evidence-Based Mindfulness
Want to step it up? Check out:
Meditation Games That You’ll Actually Enjoy
Lastly…
Dr. Fotuhi wants us to consider looking after our brain the same way we look after our teeth. No, he doesn’t want us to brush our brain, but he does want us to take small measurable actions multiple times per day, every day.
You can’t just spend the day doing nothing but brushing your teeth for the entirety of January the 1st and then expect them to be healthy for the rest of the year; it doesn’t work like that—and it doesn’t work like that for the brain, either.
So, make the habits, and keep them going
Take care!
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Life Is in the Transitions – by Bruce Feiler
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Change happens. Sometimes, because we choose it. More often, we don’t get a choice.
Our bodies change; with time, with illness, with accident or incident, or even, sometimes, with effort. People in our lives change; they come, they go, they get sick, they die. Our working lives change; we get a job, we lose a job, we change jobs, our jobs change, we retire.
Whether we’re undergoing cancer treatment or a religious conversion, whether our families are growing or down to the last few standing, change is inescapable.
Our author makes the case that on average, we each undergo at least 5 major “lifequakes”; changes that shake our lives to the core. Sometimes one will come along when we’ve barely got back on our feet from the previous—if we have at all.
What, then, to do about this? We can’t stop change from occurring, and some changes aren’t easy to “roll with”. Feiler isn’t prescriptive about this, but rather, descriptive:
By looking at the stories of hundreds of people he interviewed for this book, he looks at how people pivoted on the spot (or picked up the pieces!) and made the best of their situation—or didn’t.
Bottom line: zooming out like this, looking at many people’s lives, can remind us that while we don’t get to choose what winds we get swept by, we at least get to choose how we set the sails. The examples of others, as this book gives, can help us make better decisions.
Click here to check out Life Is In The Transitions, and get conscious about how you handle yours!
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