Glycemic Index vs Glycemic Load vs Insulin Index
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How To Actually Use Those Indices
Carbohydrates are essential for our life, and/but often bring about our early demise. It would be a very conveniently simple world if it were simply a matter of “enjoy in moderation”, but the truth is, it’s not that simple.
To take an extreme example, for the sake of clearest illustration: The person who eats an 80% whole fruit diet (and makes up the necessary protein and fats etc in the other 20%) will probably be healthier than the person who eats a “standard American diet”, despite not practising moderation in their fruit-eating activities. The “standard American diet” has many faults, and one of those faults is how it promotes sporadic insulin spikes leading to metabolic disease.
If your breakfast is a glass of orange juice, this is a supremely “moderate” consumption, but an insulin spike is an insulin spike.
Quick sidenote: if you’re wondering why eating immoderate amounts of fruit is unlikely to cause such spikes, but a single glass of orange juice is, check out:
Which Sugars Are Healthier, And Which Are Just The Same?
Glycemic Index
The first tool in our toolbox here is glycemic index, or GI.
GI measures how much a carb-containing food raises blood glucose levels, also called blood sugar levels, but it’s just glucose that’s actually measured, bearing in mind that more complex carbs will generally get broken down to glucose.
Pure glucose has a GI of 100, and other foods are ranked from 0 to 100 based on how they compare.
Sometimes, what we do to foods changes its GI.
- Some is because it changed form, like the above example of whole fruit (low GI) vs fruit juice (high GI).
- Some is because of more “industrial” refinement processes, such as whole grain wheat (medium GI) vs white flour and white flour products (high GI)
- Some is because of other changes, like starches that were allowed to cool before being reheated (or eaten cold).
Broadly speaking, a daily average GI of 45 is considered great.
But that’s not the whole story…
Glycemic Load
Glycemic Load, or GL, takes the GI and says “ok, but how much of it was there?”, because this is often relevant information.
Refined sugar may have a high GI, but half a teaspoon of sugar in your coffee isn’t going to move your blood sugar levels as much as a glass of Coke, say—the latter simply has more sugar in, and just the same zero fiber.
GL is calculated by (grams of carbs / 100) x GI, by the way.
But it still misses some important things, so now let’s look at…
Insulin Index
Insulin Index, which does not get an abbreviation (probably because of the potentially confusing appearance of “II”), measures the rise in insulin levels, regardless of glucose levels.
This is important, because a lot of insulin response is independent of blood glucose:
- Some is because of other sugars, some some is in response to fats, and yes, even proteins.
- Some is a function of metabolic base rate.
- Some is a stress response.
- Some remains a mystery!
Another reason it’s important is that insulin drives weight gain and metabolic disorders far more than glucose.
Note: the indices of foods are calculated based on average non-diabetic response. If for example you have Type 1 Diabetes, then when you take a certain food, your rise in insulin is going to be whatever insulin you then take, because your body’s insulin response is disrupted by being too busy fighting a civil war in your pancreas.
If your diabetes is type 2, or you are prediabetic, then a lot of different things could happen depending on the stage and state of your diabetes, but the insulin index is still a very good thing to be aware of, because you want to resensitize your body to insulin, which means (barring any urgent actions for immediate management of hyper- or hypoglycemia, obviously) you want to eat foods with a low insulin index where possible.
Great! What foods have a low insulin index?
Many factors affect insulin index, but to speak in general terms:
- Whole plant foods are usually top-tier options
- Lean and/or white meats generally have lower insulin index than red and/or fatty ones
- Unprocessed is generally lower than processed
- The more solid a food is, generally the lower its insulin index compared to a less solid version of the same food (e.g. baked potatoes vs mashed potatoes; cheese vs milk, etc)
But do remember the non-food factors too! This means where possible:
- reducing/managing stress
- getting frequent exercise
- getting good sleep
- practising intermittent fasting
See for example (we promise you it’s relevant):
Fix Chronic Fatigue & Regain Your Energy, By Science
…as are (especially recommendable!) the two links we drop at the bottom of that page; do check them out if you can
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Can Saturated Fats Be Healthy?
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Saturated Fat: What’s The Truth?
We asked you for your health-related opinion of saturated fat, and got the above-pictured, below-described, set of results.
- Most recorded votes were for “Saturated fat is good, but only some sources, and/or in moderation”
- This is an easy one to vote for, because of the “and/or in moderation” part, which tends to be a “safe bet” for most things.
- Next most popular was “Saturated fat is terrible for the health and should be avoided”
- About half as many recorded votes were for “I’m not actually sure what makes saturated fat different”, which is a very laudable option to click. Admitting when we don’t know things (and none of us know everything) is a very good first step to learning about them!
- Fewest recorded votes were for “Saturated fat is the best source of energy; we should get plenty”.
So, what does the science say?
First, a bit of physics, chemistry, and biology
You may be wondering what, exactly, saturated fats are “saturated” with. That’s a fair question, so…
All fats have a molecular structure made up of carbon, hydrogen, and oxygen atoms. Saturated fats are saturated with hydrogen, and thus have only single bonds between carbon atoms (unsaturated fats have at least one double-bond between carbon atoms).
The observable effect this has on them, is that fats that are saturated with hydrogen are solid at room temperature, whereas unsaturated fats are liquid at room temperature. Their different properties also make for different interactions inside the human body, including how likely or not they are to (for example) clog arteries.
See also: Could fat in your bloodstream cause blood clots?
Saturated fat is the best source of energy; we should get plenty: True or False?
False, in any reasonable interpretation, anyway. That is to say, if your idea of “plenty” is under 13g (e.g: two tablespoons of butter, and no saturated fat from other sources, e.g. meat) per day, then yes, by all means feel free to eat plenty. More than that, though, and you might want to consider trimming it down a bit.
The American Heart Association has this to say:
❝When you hear about the latest “diet of the day” or a new or odd-sounding theory about food, consider the source.
The American Heart Association recommends limiting saturated fats, which are found in butter, cheese, red meat and other animal-based foods, and tropical oils.
Decades of sound science has proven it can raise your “bad” cholesterol and put you at higher risk for heart disease.❞
Source: The American Heart Association Diet and Lifestyle Recommendations on Saturated Fat
The British Heart Foundation has a similar statement:
❝Despite what you read in the media, our advice is clear: replace saturated fats with unsaturated fats and avoid trans fats. Saturated fat is the kind of fat found in butter, lard, ghee, fatty meats and cheese. This is linked to an increased risk of heart and circulatory disease❞
Source: British Heart Foundation: What does fat do and what is saturated fat?
As for the World Health Organization:
❝1. WHO strongly recommends that adults and children reduce saturated fatty acid intake to 10% of total energy intake
2. WHO suggests further reducing saturated fatty acid intake to less than 10% of total energy intake
3. WHO strongly recommends replacing saturated fatty acids in the diet with polyunsaturated fatty acids; monounsaturated fatty acids from plant sources; or carbohydrates from foods containing naturally occurring dietary fibre, such as whole grains, vegetables, fruits and pulses.❞
Source: Saturated fatty acid and trans-fatty acid intake for adults and children: WHO guideline
Please note, organizations such as the AHA, the BHF, and the WHO are not trying to sell us anything, and just would like us to not die of heart disease, the world’s #1 killer.
As for “the best source of energy”…
We evolved to eat (much like our nearest primate cousins) a diet consisting mostly of fruits and other edible plants, with a small supplementary amount of animal-source protein and fats.
That’s not to say that because we evolved that way we have to eat that way—we are versatile omnivores. But for example, we are certainly not complete carnivores, and would quickly sicken and die if we tried to live on only meat and animal fat (we need more fiber, more carbohydrates, and many micronutrients that we usually get from plants)
The closest that humans tend to come to doing such is the ketogenic diet, which focuses on a high fat, low carbohydrate imbalance, to promote ketosis, in which the body burns fat for energy.
The ketogenic diet does work, and/but can cause a lot of health problems if a lot of care is not taken to avoid them.
See for example: 7 Keto Risks To Keep In Mind
Saturated fat is terrible for the health and should be avoided: True or False?
False, if we are talking about “completely”.
Firstly, it’s practically impossible to cut out all saturated fats, given that most dietary sources of fat are a mix of saturated, unsaturated (mono- and poly-), and trans fats (which are by far the worst, but beyond the scope of today’s main feature).
Secondly, a lot of research has been conducted and found insignificant or inconclusive results, in cases where saturated fat intake was already within acceptable levels (per the recommendations we mentioned earlier), and then cut down further.
Rather than fill up the newsletter with individual studies of this kind here’s a high-quality research review, looking at 19 meta-analyses, each of those meta-analyses having looked at many studies:
Dietary saturated fat and heart disease: a narrative review
Saturated fat is good, but only some sources, and/or in moderation: True or False?
True! The moderation part is easy to guess, so let’s take a look at the “but only some sources”.
We were not able to find any convincing science to argue for health-based reasons to favor plant- or animal-sourced saturated fat. However…
Not all saturated fats are created equal (there are many kinds), and also many of the foods containing them have additional nutrients, or harmful compounds, that make a big difference to overall health, when compared gram-for-gram in terms of containing the same amount of saturated fat.
For example:
- Palm oil’s saturated fat contains a disproportionate amount of palmitic acid, which raises LDL (“bad” cholesterol) without affecting HDL (“good” cholesterol), thus having an overall heart-harmful effect.
- Most animal fats contain a disproportionate amount of stearic acid, which has statistically insignificant effects on LDL and HDL levels, and thus is broadly considered “heart neutral” (in moderation!)
- Coconut oil’s saturated fat contains a disproportionate amount of lauric acid, which raises total cholesterol, but mostly HDL without affecting LDL, thus having an overall heart-beneficial effect (in moderation!)
Do you know what’s in the food you eat?
Test your knowledge with the BHF’s saturated fat quiz!
Enjoy!
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- Most recorded votes were for “Saturated fat is good, but only some sources, and/or in moderation”
Self-Care That’s Not Just Self-Indulgence
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Self-Care That’s Not Just Self-Indulgence
Self-care is often seen as an excuse for self-indulgence. Worse, it’s often used as an excuse for self-indulgence—in ways that can end up making us feel worse.
It’s a bit like dietary “cheat days”. If your diet needs cheat days, your diet probably isn’t right for you!
How to recognize the difference between self-care and self-indulgence?
Statistically, the majority of our subscribers are parents (whose children are now mostly grown up, but still, the point is that parenting experience has been gleaned), and/or are or have been caregivers of some form or other.
When a small child is ill, we (hopefully!) look after them carefully:
- We don’t expect too much of them, but…
- …we do expect them to adhere to things consistent with their recovery.
Critically: an important part of self-care is that it actually should be care.
Let’s spell something out: neglect is not care!
How this works for physical and mental health
If you overdo it in physical exercise, it’s right and correct to take a break to recover, and during that time, do things that will hasten one’s recovery. For example:
Overdone It? How To Speed Up Recovery After Exercise
But it’s well-known that if you just do nothing, your condition will likely deteriorate. Also, “a break to recover” is going to be as short as is necessary to recover. Then you’ll ease back into exercise, but you will get back to it.
For mental health it’s just the same. If we for whatever reason need to take a step back, it’s right and correct to do take a break to recover, and during that time, do things that will hasten one’s recovery.
Sometimes, if for example it’s just a case of burnout, rest is the best medicine, and even rest can be an active process. See for example:
How To Rest More Efficiently (Yes, Really)
So the question to ask, when it comes to self-care vs self-indulgence, is:
“Is this activity helping me to get better?”
Some examples:
Probably not great self-care activities:
- Oversleeping (unless you were sleep-deprived, in which case, it’s better to get an earlier night than a later morning, if possible)
- Overeating (comfort-eating is a thing, but your actual problems will still be there)
- Mindless activities (mindless scrolling, TV-watching, game-playing, etc)
Probably better self-care activities:
- Enjoyable physical activity (whatever that may be for you)
- Preparing your favorite food, and then enjoying it mindfully
- Engaging in a personal project that might not be that important, but it’s fulfilling to you (hobbies etc can fall into this category)
- Scheduling some time, and committing some resources, to tackling whatever problem(s) you are facing that’s prompting you to need this self-care.
- Doing the tasks you want to hide away from, but making them fun.
What’s your go-to self-care? We love to hear from you, so feel free to hit “reply” to this email, or use the handy feedback form at the bottom!
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PlantYou: Scrappy Cooking – by Carleigh Bodrug
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This is a book that took “whole foods plant-based diet” and ran with it.
“Whole foods”, you say? Carleigh Bodrug has you covered in this guide to using pretty much everything.
One of the greatest strengths of the book is its “Got this? Make that” section, for using up those odds and ends that you’d normally toss.
You may be thinking: “ok, but if to use this unusual ingredient I have to buy four other ingredients to make this recipe, generating waste from those other ingredients, then this was a bad idea”, but fear not.
Bodrug covers that too, and in many cases leftover “would get wasted” ingredients can get turned into stuff that can go into longer-term storage one way or another, to use at leisure.
Which also means that on the day “there’s nothing in the house to eat” and you don’t want to go grocery-shopping, or if some global disaster causes the supply lines to fail and the stores become empty (that could never happen though, right?), you will have the mystical ability to conjure a good meal out of assorted odds and ends that you stored because of this book.
Bottom line: if you love food and hate food waste, this is a great book for you.
Click here to check out Scrappy Cooking, and do domestic magic!
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Macadamia Nuts vs Brazil Nuts – Which is Healthier?
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Our Verdict
When comparing macadamia nuts to Brazil nuts, we picked the Brazil nuts.
Why?
They’re a lot more nutrient dense! But watch out…
First, to do due diligence in terms of macros: Brazil nuts have twice as much protein and less fat, as well as being a little higher in fiber and slightly lower in carbs.
In terms of vitamins, Brazil nuts are about 10x higher in vitamin E, while macadamias are somewhat higher in several B-vitamins.
The category of minerals is where it gets interesting. Macadamia nuts are a little higher in iron and considerably higher in Manganese. But… Brazil nuts are a lot higher in calcium, copper, magnesium, phosphorus, potassium, selenium, and zinc.
About that selenium… Specifically, it’s more than 5,000x higher, and a cup of Brazil nuts would give nearly 10,000x the recommended daily amount of selenium. Now, selenium is an essential mineral (needed for thyroid hormone production, for example), and at the RDA it’s good for good health. Your hair will be luscious and shiny. However, go much above that, and selenium toxicity becomes a thing, you may get sick, and it can cause your (luscious and shiny) hair to fall out. For this reason, it’s recommended to eat no more than 3–4 Brazil nuts per day.
In short… Brazil nuts are much more nutrient dense in general, and thus come out on top here. But, they’re so nutrient dense in the case of selenium, that careful moderation is advised.
Want to learn more?
You might like to read:
Why You Should Diversify Your Nuts
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How to Fall Asleep Faster: CBT-Insomnia Treatment
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Insomnia affects a lot of people, and is even more common as we get older. Happily, therapist Emma McAdam is here with a drug-free solution that will work for most people most of the time.
Cognitive Behavioral Therapy for Insomnia (CBTI)
While people think of causes of insomnia as being things such as stress, anxiety, overthinking, disturbances, and so forth, these things affect sleep in the short term, but don’t directly cause chronic insomnia.
We say “directly”, because chronic insomnia is usually the result of the brain becoming accustomed to the above, and thus accidentally training itself to not sleep.
The remedy: cut the bad habit of staying in bed while awake. Lying in bed awake trains the brain to associate lying in bed with wakefulness (and any associated worrying, etc). In essence, we lie down, and the brain thinks “Aha, we know this one; this is the time and place for worrying, ok, let’s get to work”.
So instead: if you’re in bed and not asleep within 15 minutes, get up and do something non-stimulating until you feel sleepy, then return to bed. This may cause some short term tiredness, but it will usually correct the chronic insomnia within a week.
For more details, tips, and troubleshooting with regard to the above, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like to read:
How to Fall Back Asleep After Waking Up in the Middle of the Night
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Should You Shower Daily?
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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
❝I read an article that daily showering is “performative” and doesn’t really give any health benefits, what do you say?❞
We looked to find the article you might be referring to, and this seems to be about a BBC article that was then picked up, rehashed in fewer (but more sensational) words, and widely popularized by the New York Post (not the most scholarly of publications, but it seems to have “done numbers”).
Here’s the BBC article:
BBC | There’s no need to shower every day—here’s why
Looking for the science behind the “Experts say…” claims, none of the articles we found linked to any new research. One of them did link to some old (2005) research:
We also see (in the dearth of scholarly research to cite), a Harvard Health article being cited quite a bit, and this is more helpful and informative than the flashy news articles, without requiring to read through a lot of hard science.
To summarize, Harvard’s Dr. Shmerling says daily showering can:
- Cause/worsen dry skin
- Make skin more permeable to pathogens
- Upset our natural balance of bacteria that are supposed to be there
- Weaken our immune system
Read in full: Harvard Health | Showering daily—is it necessary?
But what if I like showering?
Well, don’t let us stop you. But you might consider using less in the way of shower products. We wrote about this previously, in answer to a different-but-related subscriber question:
10almonds | Body Scrubs: Benefits, Risks, and Guidance
PS…
Handwashing, though? Most people could reasonably do that more often:
Would you like this section to be bigger? If so, send us more questions!
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