New Eye Drops vs Age-Related Macular Degeneration
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We’ve written previously on preventative interventions against age-related macular degeneration (AMD):
How To Avoid Age-Related Macular Degeneration
…and then supplemented that, to to speak, with:
Fatty Acids For The Eyes & Brain: The Good And The Bad
However, what if ADM happens anyway?
Not a dry eye in the house
Age-related macular degeneration comes in two forms, wet and dry, of which, dry is by far the most common (being 9 out of 10 of all cases of AMD).
It sounds like the sort of thing that eye drops should be in order for, but in fact, the wetness vs dryness is about what’s going on inside the macula, not what’s happening on the surface of the eye. Up until now, the only treatments available (aside from supplement regimes, which we linked just above) have been injectable drugs, which:
- are not fun (yes, the injection goes into the eyeball)
- don’t actually work very well (modest improvements in vision; significantly better than nothing though)
…and even those won’t help in the late stages.
However, a Korean research team has developed eye drops with peptides that inhibit the interactions between Toll-like receptors (TLRs) and TLR-signalling proteins, in a way that addresses part of the pathogenesis of AMD:
That’s quite a dense read though, so here’s a pop-science article that explains it more simply, but in more detail than we can here:
New eye drop treatment offers hope for dry AMD patients
This is a big improvement from the state of affairs previously, in which eye drops really couldn’t help at all:
What eye drops can treat macular degeneration? ← pop-science article from January 2023
No AMD, and/but want your eye health to be better?
Check out these:
10 Great Exercises to Improve Your Eyesight ← you can quickly see the results for yourself
Take care!
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State of Slim – by Dr. James Hill & Dr. Holly Wyatt
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The premise of this book is “people in Colorado are on average the slimmest in the US”, and sets about establishing why, and then doing what Coloradans are doing. As per the subtitle (drop 20 pounds in 8 weeks), this is a weight loss book and does assume that you want to lose weight—specifically, to lose fat. So if that’s not your goal, you can skip this one already.
The authors explain, as many diet and not-diet-but-diet-adjacent book authors do, that this is not a diet—and then do refer to it as the Colorado Diet throughout. So… Is it a diet?
The answer is a clear “yes, but”—and the caveat is “yes, but also some associated lifestyle practices”.
The diet component is basically a very low-carb diet to start with (with the day’s ration of carbs being a small amount of oats and whatever you can get from some non-starchy vegetables such as greens, tomatoes, etc), and then reintroducing more carbohydrate centric foods one by one, stopping after whole grains. If you are vegan or vegetarian, you can also skip this one already, because this advises eating six animal protein centric meals per day.
The non-diet components are very general healthy-living advices mixed in with popular “diet culture” advices, such as practice mindful eating, don’t eat after 8pm, exercise more, use small plates, enjoy yourself, pre-portion your snacks, don’t drink your calories, get 8 hours sleep, weigh all your food, etc.
Bottom line: this is a very mixed bag, even to the point of being a little chaotic. It gives sometimes contradictory advice, and/but this results in a very “something for everyone” cafeteria approach to dieting. The best recommendation we can give for this book is “it has very many ideas for you to try and see if they work for you”.
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Burn – by Dr. Herman Pontzer
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We all have reasons to want to focus on our metabolism. Speed it up to burn more fat; slow it down to live longer. Tweak it for more energy in the day. But what actually is it, and how does it work?
Dr. Herman Pontzer presents a very useful overview of not just what our metabolism is and how it works, but also why.
The style of the book is casual, but doesn’t skimp on the science. Whether we are getting campfire stories of Hadza hunter-gatherers, or an explanation of the use of hydrogen isotopes in metabolic research, Dr. Pontzer keeps things easy-reading.
One of the main premises of the book is that our caloric expenditure is not easy to change—if we exercise more, our bodies will cut back somewhere else. After all, the body uses energy for a lot more than just moving. With this in mind, Dr. Pontzer makes the science-based case for focusing more on diet than exercise if weight management is our goal.
In short, if you’d like your metabolism to be a lot less mysterious, this book can help render a lot of science a lot more comprehensible!
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The Worst Cookware Lurking In Your Kitchen (Toxicologist Explains)
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Dr. Yvonne Burkart gives us a rundown of the worst offenders, and what to use instead:
Hot mess
The very worst offender is non-stick cookware, the kind with materials such as Teflon. These are the most toxic, due to PFAS chemicals.
Non-stick pans release toxic gases, leach chemicals into food, and release microplastic particles, which can accumulate in the body.
One that a lot of people don’t think about, in that category, is the humble air-fryer, which often as not has a non-stick cooking “basket”. These she describes as highly toxic, as they combine plastic, non-stick coatings, and high heat, which can release fumes and other potentially dangerous chemicals into the air and food.
You may be wondering: how bad is it? And the answer is, quite bad. PFAS chemicals are linked to infertility, hypertension in pregnancy, developmental issues in children, cancer, weakened immune systems, hormonal disruption, obesity, and intestinal inflammation.
Dr. Burkart’s top picks for doing better:
- Pure ceramic cookware: top choice for safety, particularly brands like Xtrema, which are tested for heavy metal leaching.
- Carbon steel & cast iron: durable and safe; can leach iron in acidic foods (for most people, this is a plus, but some may need to be aware of it)
- Stainless steel: lightweight and affordable but can leach nickel and chromium in acidic foods at high temperatures. Use only if nothing better is available.
And specifically as alternatives to air-fryers: glass convection ovens or stainless steel ovens are safer than conventional air fryers. The old “combination oven” can often be a good choice here.
For more on all of these, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
- PFAS Exposure & Cancer: The Numbers Are High
- It’s Not Fantastic To Be Plastic ← for the closely related topic of microplastics and nanoplastics
Take care!
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Chromium Picolinate For Blood Sugar Control & Weight Loss
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First, a quick disambiguation:
- chromium found in food, trivalent chromium of various kinds, is safe (in the quantities usually consumed) and is sometimes considered an essential mineral, sometimes considered unnecessary but beneficial. It’s hard to know for sure, since it’s in a lot of foods (naturally, like many trace elements)
- chromium found in pollution, hexavalent chromium (so: twice as many cationic bonds, if this writer’s chemistry serves her correctly) is poisonous.
We’re going to be writing about the food kind, which is also possible to take as a supplement.
In this case, supplementing vs getting from food is quite a big difference, by the way, since (unlike for a lot of things, which are often the other way around) the bioavailability of chromium from food is very low (around 2.5%), whereas chromium picolinate, one of the most commonly-used supplement forms, boasts higher bioavailability.
Does it work for blood sugars?
Yes, it does! At least, it does in the case of people with type 2 diabetes. Rather than bombard you with many individual studies, here’s a systematic review and meta-analysis of 22 criteria-meeting randomized clinical trials that found:
❝The available evidence suggests favourable effects of chromium supplementation on glycaemic control in patients with diabetes.
Chromium monosupplement may additionally improve triglycerides and HDL-C levels.❞
Type 1 diabetes does not have anything like the same weight of evidence, and indeed,
we couldn’t find a single human study. It was beneficial for mice with artificially-induced T1D, thoughwait no, we have an update! We found literally a single human study:Chromium picolinate supplementation for diabetes mellitus
Literally, as in: it’s a case study of one person, and the results were a modest reduction in Hb A1c levels after 3 months of 600μg daily; the researchers concluded that ❝chromium picolinate continues to fall squarely within the scope of “alternative medicine,” with both unproven benefits and unknown risks❞.
As for people without diabetes, it may reduce the risk of diabetes:
Risk of Type 2 Diabetes Is Lower in US Adults Taking Chromium-Containing Supplements
However! This was an observational study, and correlation ≠ causation.
Furthermore, they said:
❝Over one-half the adult US population consumes nutritional supplements, and over one-quarter consumes supplemental chromium. The odds of having T2D were lower in those who, in the previous 30 d, had consumed supplements containing chromium❞
That “over one-quarter consumes supplemental chromium” brought our attention to the fact that this is not talking about specifically chromium “monosupplements” (definitely not quarter of the adult population take those), but rather, “multivitamin and mineral” supplements that also contain a tiny amount (often under 50μg) of chromium.
In other words, this ruins the data and honestly the benefit could have been from anything in the “multivitamin and mineral” supplement, or indeed, could just be “the kind of person who takes supplements is the kind of person who lives a lifestyle that is less conducive to becoming diabetic”.
Does it work for weight loss?
We’re running out of space here, so we’ll be brief:
No.
There are many papers that have concluded this, but here are two:
Chromium picolinate supplementation for overweight or obese adults
and
Is it safe?
Science’s current best answer is “we don’t know; it hasn’t been tested enough; we haven’t even established the tolerable upper limit, which is usually step 1 of establishing safety”.
Nor is there an estimated average requirement (if indeed there even is a requirement, which question is also not as yet answered conclusively by science), and science falls back to “here’s an average of what people consume in their diet, so that’s probably safe, we guess”.
(that average was reckoned as 25μg/day for young women and 25μg/day for young men, by the way; older ages not as yet reckoned)
You can read about this sorry state of affairs here.
Want to try some?
Notwithstanding the above lack of data for safety, it does have benefits for blood sugars, so if that’s a gamble you’re willing to make, then here’s an example product on Amazon.
Note: the dosage per capsule there (800μg) is half of the low end of the dose that was implicated in the serious kidney condition caused in this case study (1200–2400μg), so if you are going to try it, we strongly recommend not taking more than one per day.
Take care!
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How To Heal And Regrow Receding Gums
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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
❝Hey Sheila – As always, your articles are superb !! So, I have a topic that I’d love you guys to discuss: green tea. I used to try + drink it years ago but I always got an allergic reaction to it. So the question I’d like answered is: Will I still get the same allergic reaction if I take the capsules ? Also, because it’s caffeinated, will taking it interfere with iron pills, other vitamins + meds ? I read that the health benefits of the decaffeinated tea/capsules are not as great as the caffeinated. Any info would be greatly appreciated !! Thanks much !!❞
Hi! I’m not Sheila, but I’ll answer this one in the first person as I’ve had a similar issue:
I found long ago that taking any kind of tea (not herbal infusions, but true teas, e.g. green tea, black tea, red tea, etc) on an empty stomach made me want to throw up. The feeling would subside within about half an hour, but I learned it was far better to circumvent it by just not taking tea on an empty stomach.
However! I take an l-theanine supplement when I wake up, to complement my morning coffee, and have never had a problem with that. Of course, my physiology is not your physiology, and this “shouldn’t” be happening to either of us in the first place, so it’s not something there’s a lot of scientific literature about, and we just have to figure out what works for us.
This last Monday I wrote (inspired in part by your query) about l-theanine supplementation, and how it doesn’t require caffeine to unlock its benefits after all, by the way. So that’s that part in order.
I can’t speak for interactions with your other supplements or medications without knowing what they are, but I’m not aware of any known issue, beyond that l-theanine will tend to give a gentler curve to the expression of some neurotransmitters. So, if for example you’re talking anything that affects that (e.g. antidepressants, antipsychotics, ADHD meds, sleepy/wakefulness meds, etc) then checking with your doctor is best.
❝Can you do something on collagen and keep use posted on pineapple, and yes love and look forward to each issue❞
Glad you’re enjoying! We did write a main feature on collagen a little while back! Here it is:
We Are Such Stuff As Fish Are Made Of
As for pineapple, there’s not a lot to keep you posted about! Pineapple’s protein-digesting, DNA-unzipping action is well-established and considered harmless (if your mouth feels weird when you eat pineapple or drink pineapple juice, this is why, by the way) because no meaningful damage was done.
For example:
- Pineapple’s bromelain action is akin to taking apart a little lego model brick by brick (easy to fix)
- Clastogenic genotoxicity is more like taking a blowtorch to the lego model (less easy to fix)
Fun fact: pineapple is good against inflammation, because of the very same enzyme!
❝I never knew anything about the l- tea. Where can I purchase it?❞
You can get it online quite easily! Here’s an example on Amazon
❝The 3 most important exercises don’t work if you can’t get on the floor. I’m 78, and have knee replacements. What about 3 best chair yoga stretches? Love your articles!❞
Here are six!
We turn the tables and ask you a question!
We’ll then talk about this tomorrow:
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Reflexology: What The Science Says
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How Does Reflexology Work, Really?
In Wednesday’s newsletter, we asked you for your opinion of reflexology, and got the above-depicted, below-described set of responses:
- About 63% said “It works by specific nerves connecting the feet and hands to various specific organs, triggering healing remotely”
- About 26% said “It works by realigning the body’s energies (e.g. qi, ki, prana, etc), removing blockages and improving health“
- About 11% said “It works by placebo, at best, and has no evidence for any efficacy beyond that”
So, what does the science say?
It works by realigning the body’s energies (e.g. qi, ki, prana, etc), removing blockages and improving health: True or False?
False, or since we can’t prove a negative: there is no reliable scientific evidence for this.
Further, there is no reliable scientific evidence for the existence of qi, ki, prana, soma, mana, or whatever we want to call it.
To save doubling up, we did discuss this in some more detail, exploring the notion of qi as bioelectrical energy, including a look at some unreliable clinical evidence for it (a study that used shoddy methodology, but it’s important to understand what they did wrong, to watch out for such), when we looked at [the legitimately very healthful practice of] qigong, a couple of weeks ago:
Qigong: A Breath Of Fresh Air?
As for reflexology specifically: in terms of blockages of qi causing disease (and thus being a putative therapeutic mechanism of action for attenuating disease), it’s an interesting hypothesis but in terms of scientific merit, it was pre-emptively supplanted by germ theory and other similarly observable-and-measurable phenomena.
We say “pre-emptively”, because despite orientalist marketing, unless we want to count some ancient pictures of people getting a foot massage and say it is reflexology, there is no record of reflexology being a thing before 1913 (and that was in the US, by a laryngologist working with a spiritualist to produce a book that they published in 1917).
It works by specific nerves connecting the feet and hands to various specific organs, triggering healing remotely: True or False?
False, or since we can’t prove a negative: there is no reliable scientific evidence for this.
A very large independent review of available scientific literature found the current medical consensus on reflexology is that:
- Reflexology is effective for: anxiety (but short lasting), edema, mild insomnia, quality of sleep, and relieving pain (short term: 2–3 hours)
- Reflexology is not effective for: inflammatory bowel disease, fertility treatment, neuropathy and polyneuropathy, acute low back pain, sub acute low back pain, chronic low back pain, radicular pain syndromes (including sciatica), post-operative low back pain, spinal stenosis, spinal fractures, sacroiliitis, spondylolisthesis, complex regional pain syndrome, trigger points / myofascial pain, chronic persistent pain, chronic low back pain, depression, work related injuries of the hip and pelvis
Source: Reflexology – a scientific literary review compilation
(the above is a fascinating read, by the way, and its 50 pages go into a lot more detail than we have room to here)
Now, those items that they found it effective for, looks suspiciously like a short list of things that placebo is often good for, and/or any relaxing activity.
Another review was not so generous:
❝The best evidence available to date does not demonstrate convincingly that reflexology is an effective treatment for any medical condition❞
~ Dr. Edzard Ernst (MD, PhD, FMedSci)
Source: Is reflexology an effective intervention? A systematic review of randomised controlled trials
In short, from the available scientific literature, we can surmise:
- Some researchers have found it to have some usefulness against chiefly psychosomatic conditions
- Other researchers have found the evidence for even that much to be uncompelling
It works by placebo, at best, and has no evidence for any efficacy beyond that: True or False?
Mostly True; of course reflexology runs into similar problems as acupuncture when it comes to testing against placebo:
How Does One Test Acupuncture Against Placebo Anyway?
…but not quite as bad, since it is easier to give a random foot massage while pretending it is a clinical treatment, than to fake putting needles into key locations.
However, as the paper we cited just above (in answer to the previous True/False question) shows, reflexology does not appear to meaningfully outperform placebo—which points to the possibility that it does work by placebo, and is just a placebo treatment on the high end of placebo (because the placebo effect is real, does work, isn’t “nothing”, and some placebos work better than others).
For more on the fascinating science and useful (applicable in daily life!) practicalities of how placebo does work, check out:
How To Leverage Placebo Effect For Yourself
Take care!
Don’t Forget…
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