Demystifying Cholesterol
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All About Cholesterol
When it comes to cholesterol, the most common lay understanding (especially under a certain age) is “it’s bad”.
A more informed view (and more common after a certain age) is “LDL cholesterol is bad; HDL cholesterol is good”.
A more nuanced view is “LDL cholesterol is established as significantly associated with (and almost certainly a causal factor of) atherosclerotic cardiovascular disease and related mortality in men; in women it is less strongly associated and may or may not be a causal factor”
You can read more about that here:
Statins: His & Hers? ← we highly recommend reading this, especially if you are a woman and/or considering/taking statins. To be clear, we’re not saying “don’t take statins!”, because they might be the right medical choice for you and we’re not your doctors. But we are saying: here’s something to at least know about and consider.
Beyond HDL & LDL
There is also VLDL cholesterol, which as you might have guessed, stands for “very low-density lipoprotein”. It has a high, unhealthy triglyceride content, and it increases atherosclerotic plaque. In other words, it hardens your arteries more quickly.
The term “hardening the arteries” is an insufficient descriptor of what’s happening though, because while yes it is hardening the arteries, it’s also narrowing them. Because minerals and detritus passing through in the blood (the latter sounds bad, but there is supposed to be detritus passing through in the blood; it’s got to get out of the body somehow, and it’s off to get filtered and excreted) get stuck in the cholesterol (which itself is a waxy substance, by the way) and before you know it, those minerals and other things have become a solid part of the interior of your artery wall, like a little plastering team came and slapped plaster on the inside of the walls, then when it hardened, slapped more plaster on, and so on. Macrophages (normally the body’s best interior clean-up team) can’t eat things much bigger than themselves, so that means they can’t tackle the build-up of plaque.
Impact on the heart
Narrower less flexible arteries means very poor circulation, which means that organs can start having problems, which obviously includes your heart itself as it is not only having to do a harder job to keep the blood circulating through the narrower blood vessels, but also, it is not immune to also being starved of oxygen and nutrients along with the rest of the body when the circulation isn’t good enough. It’s a catch 22.
What if LDL is low and someone is getting heart disease anyway?
That’s often a case of apolipoprotein B, and unlike lipoprotein A, which is bound to LDL so usually* isn’t a problem if LDL is in “safe” ranges, Apo-B can more often cause problems even when LDL is low. Neither of these are tested for in most standard cholesterol tests by the way, so you might have to ask for them.
*Some people, around 1 in 20 people, have hereditary extra risk factors for this.
What to do about it?
Well, get those lipids tests! Including asking for the LpA and Apo-B tests, especially if you have a history of heart disease in your family, or otherwise know you have a genetic risk factor.
With or without extra genetic risks, it’s good to get lipids tests done annually from 40 onwards (earlier, if you have extra risk factors).
See also: Understanding your cholesterol numbers
Wondering whether you have an increased genetic risk or not?
Genetic Testing: Health Benefits & Methods ← we think this is worth doing; it’s a “one-off test tells many useful things”. Usually done from a saliva sample, but some companies arrange a blood draw instead. Cost is usually quite affordable; do shop around, though.
Additionally, talk to your pharmacist to check whether any of your meds have contraindications or interactions you should be aware of in this regard. Pharmacists usually know contraindications/interactions stuff better than doctors, and/but unlike doctors, they don’t have social pressure on them to know everything, which means that if they’re not sure, instead of just guessing and reassuring you in a confident voice, they’ll actually check.
Lastly, shocking nobody, all the usual lifestyle medicine advice applies here, especially get plenty of moderate exercise and eat a good diet, preferably mostly if not entirely plant-based, and go easy on the saturated fat.
Note: while a vegan diet contains zero dietary cholesterol (because plants don’t make it), vegans can still get unhealthy blood lipid levels, because we are animals and—like most animals—our body is perfectly capable of making its own cholesterol (indeed, we do need some cholesterol to function), and it can make its own in the wrong balance, if for example we go too heavy on certain kinds of (yes, even some plant-based) saturated fat.
Read more: Can Saturated Fats Be Healthy? ← see for example how palm oil and coconut oil are both plant-based, and both high in saturated fat, but palm oil’s is heart-unhealthy on balance, while coconut oil’s is heart-healthy on balance (in moderation).
Want to know more about your personal risk?
Try the American College of Cardiology’s ASCVD risk estimator (it’s free)
Take care!
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The Gut Revolution – by Dr. Christine Bishara
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You may be wondering: what sets this apart from other books about gut health?
And one answer is: the author discusses her own published study, with regard to the connection between a deficiency in Bifidobacterium sp., and COVID infection risk/severity. However, this is not an entire book to say “supplement Bifidobacterium sp.”; rather, there are many other things at hand too.
And indeed, supplementing with probiotics will be useless if your gut is not an environment conducive to them thriving. If you take probiotics on an otherwise “Standard American Diet”, then this is approximately the equivalent of paradropping firefighters naked into a raging fire. It will not help. It isn’t the thought that counts.
Instead, Dr. Bishara talks us through what is required for beneficial gut bacteria to thrive, and how to go about making our gut an ideal place for them. In return, they will produce important biochemical metabolites for us, they will improve our immune response, regulate our emotions, help us maintain a healthy weight, heal our skin, and make us smell nice too. In short, they’re a trillions-strong clean-up and maintenance team, if only we treat our workforce well.
Another thing that Dr. Bishara brings of value here that’s not found in a lot of gut health books is the benefits (for gut health) of intermittent fasting, and specifically, a very useful timeline of what happens when, to ensure we do not sabotage our efforts by breaking our fast too early or too late.
The style is easy-reading pop-science, albeit with scientific references throughout for those who want to delve deeper.
Bottom line: this is a gut health book that stands out from the crowd in several ways, and is well worth the investment of reading it!
Click here to check out Gut Revolution, and help yours to help you!
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Type 2 Diabetic Foot Problems
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It’s Q&A Day!
Have a question or a request? You can always hit “reply” to any of our emails, or use the feedback widget at the bottom!
This newsletter has been growing a lot lately, and so have the questions/requests, and we love that! 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
Q: I’d like to know more about type 2 diabetic foot problems
You probably know that the “foot problems” thing has less to do with the feet and more to do with blood and nerves. So, why the feet?
The reason feet often get something like the worst of it, is because they are extremities, and in the case of blood sugars being too high for too long too often, they’re getting more damage as blood has to fight its way back up your body. Diabetic neuropathy happens when nerves are malnourished because the blood that should be keeping them healthy, is instead syrupy and sluggish.
We’ll definitely do a main feature sometime soon on keeping blood sugars healthy, for both types of diabetes plus pre-diabetes and just general advice for all.
In the meantime, here’s some very good advice on keeping your feet healthy in the context of diabetes. This one’s focussed on Type 1 Diabetes, but the advice goes for both:
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The Intelligence Trap – by David Robson
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We’re including this one under the umbrella of “general wellness”, because it happens that a lot of very intelligent people make stunningly unfortunate choices sometimes, for reasons that may baffle others.
The author outlines for us the various reasons that this happens, and how. From the famous trope of “specialized intelligence in one area”, to the tendency of people who are better at acquiring knowledge and understanding to also be better at acquiring biases along the way, to the hubris of “I am intelligent and therefore right as a matter of principle” thinking, and many other reasons.
Perhaps the greatest value of the book is the focus on how we can avoid these traps, narrow our bias blind spots, and play to our strengths while paying full attention to our weaknesses.
The style is very readable, despite having a lot of complex ideas discussed along the way. This is entirely to be expected of this author, an award-winning science writer.
Bottom line: if you’d like to better understand the array of traps that disproportionately catch out the most intelligent people (and how to spot such), then this is a great book for you.
Click here to check out The Intelligence Trap, and be more wary!
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Why do I need to take some medicines with food?
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Have you ever been instructed to take your medicine with food and wondered why? Perhaps you’ve wondered if you really need to?
There are varied reasons, and sometimes complex science and chemistry, behind why you may be advised to take a medicine with food.
To complicate matters, some similar medicines need to be taken differently. The antibiotic amoxicillin with clavulanic acid (sold as Amoxil Duo Forte), for example, is recommended to be taken with food, while amoxicillin alone (sold as Amoxil), can be taken with or without food.
Different brands of the same medicine may also have different recommendations when it comes to taking it with food.
Ron Lach/Pexels Food impacts drug absorption
Food can affect how fast and how much a drug is absorbed into the body in up to 40% of medicines taken orally.
When you have food in your stomach, the makeup of the digestive juices change. This includes things like the fluid volume, thickness, pH (which becomes less acidic with food), surface tension, movement and how much salt is in your bile. These changes can impair or enhance drug absorption.
Eating a meal also delays how fast the contents of the stomach move into the small intestine – this is known as gastric emptying. The small intestine has a large surface area and rich blood supply – and this is the primary site of drug absorption.
Eating a meal with medicine will delay its onset. Farhad/Pexels Eating a larger meal, or one with lots of fibre, delays gastric emptying more than a smaller meal. Sometimes, health professionals will advise you to take a medicine with food, to help your body absorb the drug more slowly.
But if a drug can be taken with or without food – such as paracetamol – and you want it to work faster, take it on an empty stomach.
Food can make medicines more tolerable
Have you ever taken a medicine on an empty stomach and felt nauseated soon after? Some medicines can cause stomach upsets.
Metformin, for example, is a drug that reduces blood glucose and treats type 2 diabetes and polycystic ovary syndrome. It commonly causes gastrointestinal symptoms, with one in four users affected. To combat these side effects, it is generally recommended to be taken with food.
The same advice is given for corticosteroids (such as prednisolone/prednisone) and certain antibiotics (such as doxycycline).
Taking some medicines with food makes them more tolerable and improves the chance you’ll take it for the duration it’s prescribed.
Can food make medicines safer?
Ibuprofen is one of the most widely used over-the-counter medicines, with around one in five Australians reporting use within a two-week period.
While effective for pain and inflammation, ibuprofen can impact the stomach by inhibiting protective prostaglandins, increasing the risk of bleeding, ulceration and perforation with long-term use.
But there isn’t enough research to show taking ibuprofen with food reduces this risk.
Prolonged use may also affect kidney function, particularly in those with pre-existing conditions or dehydration.
The Australian Medicines Handbook, which guides prescribers about medicine usage and dosage, advises taking ibuprofen (sold as Nurofen and Advil) with a glass of water – or with a meal if it upsets your stomach.
If it doesn’t upset your stomach, ibuprofen can be taken with water. Tbel Abuseridze/Unsplash A systematic review published in 2015 found food delays the transit of ibuprofen to the small intestine and absorption, which delays therapeutic effect and the time before pain relief. It also found taking short courses of ibuprofen without food reduced the need for additional doses.
To reduce the risk of ibuprofen causing damage to your stomach or kidneys, use the lowest effective dose for the shortest duration, stay hydrated and avoid taking other non-steroidal anti-inflammatory medicines at the same time.
For people who use ibuprofen for prolonged periods and are at higher risk of gastrointestinal side effects (such as people with a history of ulcers or older adults), your prescriber may start you on a proton pump inhibitor, a medicine that reduces stomach acid and protects the stomach lining.
How much food do you need?
When you need to take a medicine with food, how much is enough?
Sometimes a full glass of milk or a couple of crackers may be enough, for medicines such as prednisone/prednisolone.
However, most head-to-head studies that compare the effects of a medicine “with food” and without, usually use a heavy meal to define “with food”. So, a cracker may not be enough, particularly for those with a sensitive stomach. A more substantial meal that includes a mix of fat, protein and carbohydrates is generally advised.
Your health professional can advise you on which of your medicines need to be taken with food and how they interact with your digestive system.
Mary Bushell, Clinical Associate Professor in Pharmacy, University of Canberra
This article is republished from The Conversation under a Creative Commons license. Read the original article.
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Why Chronic Obstructive Pulmonary Disease (COPD) Is More Likely Than You Think
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Chronic Obstructive Pulmonary Disease (COPD): More Likely Than You Think
COPD is not so much one disease, as rather a collection of similar (and often overlapping) diseases. The main defining characteristic is that they are progressive lung diseases. Historically the most common have been chronic bronchitis and emphysema, though Long COVID and related Post-COVID conditions appear to have been making inroads.
Lung cancer is generally considered separately, despite being a progressive lung disease, but there is crossover too:
COPD prevalence is increased in lung cancer, independent of age, sex and smoking history
COPD can be quite serious:
“But I don’t smoke”
Great! In fact we imagine our readership probably has disproportionately few smokers compared to the general population, being as we all are interested in our health.
But, it’s estimated that 30,000,000 Americans have COPD, and approximately half don’t know it. Bear in mind, the population of the US is a little over 340,000,000, so that’s a little under 9% of the population.
Click here to see a state-by-state breakdown (how does your state measure up?)
How would I know if I have it?
It typically starts like any mild respiratory illness. Likely shortness of breath, especially after exercise, a mild cough, and a frequent need to clear your throat.
Then it will get worse, as the lungs become more damaged; each of those symptoms might become stronger, as well as chest tightness and a general lack of energy.
Later stages, you guessed it, the same but worse, and—tellingly—weight loss.
The reason for the weight loss is because you are getting less oxygen per breath, making carrying your body around harder work, meaning you burn more calories.
What causes it?
Lots of things, with smoking being up at the top, or being exposed to a lot of second-hand smoke. Working in an environment with a lot of air pollution (for example, working around chemical fumes) can cause it, as can inhaling dust. New Yorkers: yes, that dust too. It can also develop from other respiratory illnesses, and some people even have a genetic predisposition to it:
Alpha-1 antitrypsin deficiency: a commonly overlooked cause of lung disease
Is it treatable?
Treatment varies depending on what form of it you have, and most of the medical interventions are beyond the scope of this article. Suffice it to say, there are medications that can be taken (including bronchodilators taken via an inhaler device), corticosteroids, antibiotics and antivirals of various kinds if appropriate. This is definitely a “see your doctor” item though, because there are is far too much individual variation for us to usefully advise here.
However!
There are habits we can do to a) make COPD less likely and b) make COPD at least a little less bad if we get it.
Avoiding COPD:
- Don’t smoke. Just don’t.
- Avoid second-hand smoke if you can
- Avoid inhaling other chemicals/dust that may be harmful
- Breathe through your nose, not your mouth; it filters the air in a whole bunch of ways
- Seriously, we know it seems like nostril hairs surely can’t do much against tiny particles, but tiny particles are attracted to them and get stuck in mucous and dealt with by our immune system, so it really does make a big difference
Managing COPD:
- Continue the above things, of course
- Exercise regularly, even just light walking helps; we realize it will be difficult
- Maintain a healthy weight if you can
- This means both ways; COPD causes weight loss and that needs to be held in check. But similarly, you don’t want to be carrying excessive weight either; that will tire you even more.
- Look after the rest of your health; everything else will now hit you harder, so even small things need to be taken seriously
- If you can, get someone to help / do your household cleaning for you, ideally while you are not in the room.
Where can I get more help/advice?
As ever, speak to your doctor if you are concerned this may be affecting you. You can also find a lot of resources via the COPD Foundation’s website.
Take care of yourself!
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- Don’t smoke. Just don’t.
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Undo The Sun’s Damage To Your Skin
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It’s often said that our skin is our largest organ. Our brain or liver are the largest solid organs by mass (which one comes out on top will vary from person to person), our gut is the longest, and our lungs are the largest by surface area. But our skin is large, noticeable, and has a big impact on the rest of our health.
The sun is one of the main damaging factors for our skin; assorted toxins are also a major threat for many people, and once the skin barrier gets broken, it’s a field-day for bacteria.
So, what can we do about it?
Tretinoin: the skin’s rejuvenator
Tretinoin is also called retinoic acid, not to be mistaken for retinol, although they are both retinoids. Tretinoin is much stronger.
As for what it’s stronger at:
It’s usually prescribed for the treatment of sun-damage, acne, and wrinkles. Paradoxically, it works by inflaming the skin (and then making it better, and having done so, keeping it better).
In few words: it encourages your skin to speed up its life cycle, which means that cells die and are replaced sooner, which means the average age of skin cells will be considerably younger at any given time.
This is the same principle as we see at work when it comes to cellular apoptosis and autophagy in general, and specifically the same idea as we discussed when talking about senolytics, compounds that kill aging cells:
Fisetin: The Anti-Aging Assassin
About that paradoxical inflammation…
❝The topical use of tretinoin as an antiacne agent began almost a half century ago. Since that time it has been successfully used to treat comedonal and inflammatory acne.
Over the intervening years, the beneficial effects of tretinoin have grown from an understanding of its potent cornedolytie-related properties to an evolving appreciation of its antiinflammatory actions.
…
The topical use of clindamycin and tretinoin as a combination treatment modality that includes antibacterial, comedolytic, and antiinflammatoiy properties has proven to be a very effective therapy for treating the various stages of acne
…
It is now becoming increasingly clear that there may be good reasons for these observations.❞
~ Drs. Schmidt & Gans, lightly edited here for brevity
Read in full: Tretinoin: A Review of Its Anti-inflammatory Properties in the Treatment of Acne
Against damage by the sun
The older we get, the more likely sun damage is a problem than acne. And in the case of tretinoin,
❝In several well-controlled clinical trials, the proportion of patients showing improvement was significantly higher with 0.01 or 0.05% tretinoin cream than with placebo for criteria such as global assessment, fine and coarse wrinkling, pigmentation and roughness.
Improvements in the overall severity of photodamage were also significantly greater with tretinoin than with placebo.
…
Several placebo-controlled clinical studies have demonstrated that topical tretinoin has significant efficacy in the treatment of photodamaged skin. Improvements in subjective global assessment scores were recorded in:
49–100% of patients using once-daily 0.01% tretinoin,
68–100% of patients using 0.05% tretinoin, and
0–44% of patients using placebo.❞
~ Drs. Wagstaff & Noble
…which is quite compelling.
Read in full: Tretinoin: A Review of its Pharmacological Properties and Clinical Efficacy in the Topical Treatment of Photodamaged Skin
This is very well-established by now; here’s an old paper from when the mechanism of action was unknown (here in the current day, 17 mechanisms of action have been identified; beyond the scope of this article as we only have so much room, but it’s nice to see science building on science):
❝Tretinoin cream has been used extensively to reverse the changes of photoaging. It is the first topical therapy to undergo controlled clinical testing and proved to be efficacious. These results have been substantiated with photography, histopathologie examination, and skin surface replicas.
…
Tretinoin cream has an excellent safety record; a local cutaneous hypervitaminosis A reaction is the only common problem.❞
~ Dr. Goldfarb et al.
Read in full: Topical tretinoin therapy: Its use in photoaged skin
Is it safe?
For most people, when used as directed*, yes. However, it’s likely to irritate your skin at first, and that’s normal. If this persists more than a few weeks, or seems unduly severe, then you might want to stop and talk to your doctor again.
*See also: Scarring following inappropriate use of 0.05% tretinoin gel
(in the case of a young woman who used it 4x daily instead of 1x daily)
Want to try some?
Tretinoin is prescription-only, so speak with your doctor/pharmacist about that. Alternatively, retinal (not retinol) is the strongest natural alternative that works on the same principles; here’s an example product on Amazon 😎
Take care!
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