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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The Circadian Diabetes Code – by Dr. Satchin Panda
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We have previously reviewed Dr. Panda’s “The Circadian Code” which pertains to the circadian rhythms (yes, plural) in general; this one uses much of the same research, but with a strong focus on the implications for blood sugar management.
It’s first a primer in diabetes (and prediabetes, and, in contrast, what things should look like if healthy). You’ll understand about glucose metabolism and glycogen and insulin and more; you’ll understand what blood sugar readings mean, and you’ll know what an Hb1AC count actually is and what it should look like too, things like that.
After that, it’s indeed about what the subtitle promises: the right times to eat (and what to eat), when to exercise (and how, at which time), and how to optimize your sleep in the context of circadian rhythm and blood sugar management.
You may be wondering: why does circadian rhythm matter for blood sugars? And the answer is explained at some length in the first part of the book, but to oversimplify greatly: your body needs energy all the time, no matter when it was that you last ate. Thus, it has to organize its energy reserves to that at all times you can 1) function, on a cellular level 2) maintain a steady balance of sugar in your blood despite using it at slightly higher or lower levels at different times of day. Because the basal metabolic rate accounts for most of our energy use, the body has to plan for a base rate of so much energy per day, and to do that, it needs to know what a day is. Dr. Panda explains this in detail (the marvels of PER proteins and all that), but basically, that’s the relevance of circadian rhythm.
However, it’s not all theory and biochemistry; there is also a 12-week program to reverse prediabetes and type 2 diabetes (it will not, of course, reverse Type 1 Diabetes, sorry—but the program will still be beneficial even in that case, since more even blood sugars means fewer woes).
They style is friendly and clear, explaining the science simply, yet without patronizing the reader. References are given, with claims sourced in an extensive bibliography.
Bottom line: if you or a loved one have diabetes or prediabetes, or just have a strong desire to avoid getting such and generally keep your metabolic health in good order, this book will definitely help.
Click here to check out The Diabetes Code, and enjoy better blood sugar health than ever!
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How to Change – by Katy Milkman
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Sometimes it seems that we know everything we should be doing… We have systems and goals and principles, we know about the importance of habits, and we do our best to live them. Yet, somehow, life has other plans for us and things don’t quite come together they way they did in our genius masterplan.
So, what happened? And more importantly, what are we supposed to do about this? Katy Milkman has answers, right from the start.
Sometimes, it can be as simple as when we try to implement a change. It’s not that there’s a “wrong time” for a good change, so much that there are times that are much more likely to succeed than others… and those times can be identified and used.
Sometimes we’re falling prey to vices—which she explains how to overcome—such as:
- Impulsivity
- Procrastination
- Forgetfulness
- Laziness
We also learn some counterintuitive truths about what can boost or sabotage our confidence along the way!
Milkman writes in a compelling, almost narrative style, that makes for very easy reading. The key ideas, built up to by little (ostensibly true) stories and then revealed, become both clear and memorable. Most importantly, applicable.
Bottom line: this is a great troubleshooting guide for when you know how everything should be working, but somehow, it just doesn’t—and you’d like to fix that.
Click here to check out “How To Change” on Amazon, and get those changes rolling!
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Eat to Beat Your Diet – by Dr. William Li
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We previously reviewed Dr. Li’s excellent “Eat To Beat Disease”, so you may be wondering how much overlap there is. While he does still cover such topics as angiogenesis, organ regeneration, microbiome health, DNA protection, and immunological considerations, and much of the dietary advice is similar, most of the explanation is different.
Because, this time, rather than looking at beating disease in general, there’s a much stronger focus on metabolic disease in particular, and yes, for those who want to do so, losing fat.
The scientific explanations are in-depth, such that you come way with not merely “I should eat an avocado once in a while”, but a comprehensive understanding of the body’s metabolic processes, from the chemistry to the organs involved, from the cellular to the systemic.
The style is on the hard end of pop-science. It’s approachably readable, while having a lot of densely-packed information with minimal fluff. You will be more than getting your money’s worth out of its 496 pages.
Bottom line: if you’d like to perk up your metabolism with a dietary approach that’s enjoyable and very restrictive, then this book will arm you with the knowledge to do that.
Click here to check out Eat To Beat Your Diet, and eat to beat your diet!
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Tight Hamstrings? Here’s A Test To Know If It’s Actually Your Sciatic Nerve
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Tight hamstrings are often not actually due to hamstring issues, but rather, are often being limited by the sciatic nerve. This video offers a home test to determine if the sciatic nerve is causing mobility problems (and how to improve it, if so):
The Connection
Try this test:
- Sit down with a slumped posture.
- Extend one leg with the ankle flexed.
- Note any stretching or pulling sensation behind the knee or in the calf.
- Bring your head down to your chest
If this increases the sensation, it likely indicates sciatic nerve involvement.
If only the hamstrings are tight, head movement won’t change the stretch sensation.
This is because the nervous system is a continuous structure, so head movement can affect nerve tension throughout the body. While this can cause problems, it can also be integral in the solution. Here are two ways:
- Flossing method: sit with “poor” slumped posture, extend the knee, keep the ankle flexed, and lift the head to relieve nerve tension. This movement helps the sciatic nerve slide without stretching it.
- Even easier method: lie on your back, grab behind the knee, and extend the leg while extending the neck. This position avoids compression in the gluteal area, making it suitable for severely compromised nerves. Perform the movement without significant stretching or pain.
In both cases: move gently to avoid straining the nerve, which can worsen muscle tension. Do 10 repetitions per leg, multiple times a day; after a week, increase to 20 reps.
A word of caution: speak with your doctor before trying these exercises if you have underlying neurological diseases, cut or infected nerves, or other severe conditions.
For more on all of this, plus visual demonstrations, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
Exercises for Sciatica Pain Relief
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The Cancer Journey – by Dr. Chadi Nabhan
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After a brief introduction of what cancer actually is and what causes it, the layout of the rest of the book is in chronological order of patient experience, that is to say, what to expect during the journey from screening and diagnosis, to one’s first oncology visit (the author being an oncologist himself), how cancer staging works, getting second opinions, and a chapter-by-chapter review of many different treatment options, ranging from surgery and chemotherapy, to radiation and hormonal therapies, and even more modern targeted therapies, immunotherapy, cellular therapies, and yes, complementary and alternative therapies, amongst others we haven’t listed for the sake of brevity.
He doesn’t leave it there though; he also talks managing side effects, monitoring for recurrence, and even caring for the caregiver(s), along with eventual survivorship and that emotional journey, or if it comes down to it, palliative and hospice care.
Finishing on a hopeful note, he also brings attention to novel approaches that are being trialled presently, and the prospects for the near future of cancer care.
The style is very human and readable, notwithstanding that the author has hundreds of peer-reviewed publications to his name, the content here is presented in a much more approachable, less clinical way, while still conveying all the information that needs to be conveyed.
Bottom line: if you or a loved one is facing cancer, this book will be an invaluable resource.
Click here to check out The Cancer Journey, and understand each part of it!
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How to Use Topical Estrogen Cream For Aging Skin
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Dr. Sam Ellis, dermatologist, explains:
Tackling the cause
Estrogen is important for very many aspects of health beyond the sexual aspects. When it comes to skin, a drop in estrogen (usually because of menopause) leads to changes like collagen loss, dryness, reduced elasticity, and slower wound healing. Applying estrogen creams to the skin can reverse these changes.
If your estrogen levels are already within normal pre-menopausal female ranges, by the way, there isn’t so much science to indicate its benefit when used topically. If you are already on systemic HRT (i.e., you take estrogen already to raise your blood estrogen levels and affect your body in its entirety), you may or may not gain extra benefits from the topical cream, depending on factors such as your estrogen dose, your route of administration, your cardiovascular health, and other factors.
For those with lower estrogen and not currently on HRT, you may be wondering: can topical estrogen cream affect systemic estrogen levels? And the answer is that it mostly depends on the dose. In other words: it’s definitely possible, but for most people it’s unlikely.
As ever, if thinking of taking up any hormonal treatment, do consult an endocrinologist and/or gynecologist, and if you have an increased breast cancer risk (for example genetically or prior history), then an oncologist too, just to be safe.
That sounds like a lot of scary things, but mostly it’s just to be on the safe side. The dose of estrogen is very low in topical creams, and even then, only a tiny amount is used per day.
For more on all of this, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- “Why Does It Hurt When I Have Sex?” (And What To Do About It) ← because topical estrogen is not just for your face! Yes, you can use it down there too and it’s commonly prescribed for exactly this use.
- Hormones & Health, Beyond The Obvious
- The Hormone Therapy That Reduces Breast Cancer Risk & More
Take care!
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