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
Take care!
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The Exercise That Protects Your Brain
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The Neuroscientist In The Gym
This is Dr. Wendy Suzuki. She’s a neuroscientist, and an expert in the neurobiology of memory, as well as neuroplasticity, and the role of exercise in neuroprotection.
We’ve sneakily semi-featured her before when we shared her Big Think talk:
Brain Benefits In Three Months… Through Walking?
Today we’re going to expand on that a little!
A Quick Recap
To share the absolute key points of that already fairly streamlined rundown:
- Exercise boosts levels of neurotransmitters such as dopamine and serotonin (and, which wasn’t mentioned there, noradrenaline)
- These are responsible for motivation, happiness, and focus (amongst other things)
- Persistent exercise boosts certain regions of the brain in particular, most notably the pre-frontal cortex and the hippocampi*
- These are responsible for planning and memory (amongst other things)
Dr. Suzuki advocates for stepping up your exercise routine if you can, with more exercise generally being better than less (unless you have some special medical reason why that’s not the case for you).
*often referred to in the singular as the hippocampus, but you have one on each side of your brain (unless a serious accident/incident destroyed one, but you’ll know if that applies to you, unless you lost both, in which case you will not remember about it).
What kind(s) of workout?
While a varied workout is best for overall health, for these brain benefits specifically, what’s most important is that it raises your heart rate.
This is why in her Big Think talk we shared before, she talks about the benefits of taking a brisk walk daily. See also:
If that’s not your thing, though (and/or is for whatever reason an inaccessible form of exercise for you), there is almost certainly some kind of High Intensity Interval Training that is a possibility for you. That might sound intimidating, but if you have a bit of floor and can exercise for one minute at a time, then HIIT is an option for you:
How To Do HIIT (Without Wrecking Your Body)
Dr. Suzuki herself is an ardent fan of “intenSati” which blends cardio workouts with yoga for holistic mind-and-body fitness. In fact, she loves it so much that she became a certified exercise instructor:
How much is enough?
It’s natural to want to know the minimum we can do to get results, but Dr. Suzuki would like us to bear in mind that when it comes to our time spent exercising, it’s not so much an expense of time as an investment in time:
❝Exercise is something that when you spend time on it, it will buy you time when you start to work❞
Read more: A Neuroscientist Experimented on Her Students and Found a Powerful Way to Improve Brain Function
Ok, but we really want to know how much!
Dr. Suzuki recommends at least three to four 30-minute exercise sessions per week.
Note: this adds up to less than the recommended 150 minutes of moderate exercise per week, but high-intensity exercise counts for twice the minutes for these purposes, e.g. 1 minute of high-intensity exercise is worth 2 minutes of moderate exercise.
How soon will we see benefits?
Benefits start immediately, but stack up cumulatively with continued long-term exercise:
❝My lab showed that a single workout can improve your ability to shift and focus attention, and that focus improvement will last for at least two hours. ❞
…which is a great start, but what’s more exciting is…
❝The more you’re working out, the bigger and stronger your hippocampus and prefrontal cortex gets. Why is that important?
Because the prefrontal cortex and the hippocampus are the two areas that are most susceptible to neurodegenerative diseases and normal cognitive decline in aging. ❞
In other words, while improving your heart rate through regular exercise will help prevent neurodegeneration by the usual mechanism of reducing neuroinflammation… It’ll also build the parts of your brain most susceptible to decline, meaning that when/if decline sets in, it’ll take a lot longer to get to a critical level of degradation, because it had more to start with.
Read more:
Inspir Modern Senior Living | Dr. Wendy Suzuki Boosts Brain Health with Exercise
Want more from Dr. Suzuki?
You might enjoy her TED talk:
Click Here If The Embedded Video Doesn’t Load Automatically
Prefer text? TED.com has a transcript for you
Prefer lots of text? You might like her book, which we haven’t reviewed yet but will soon:
Enjoy!
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- Exercise boosts levels of neurotransmitters such as dopamine and serotonin (and, which wasn’t mentioned there, noradrenaline)
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The Dental Diet – by Dr. Steven Lin
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As it turns out, there’s a lot more to healthy teeth than skipping the sugar and getting some calcium.
The author’s journey started with the realization that most of his work as a dentist should be unnecessary, and not just in the “you should have been flossing” sense. Rather, he came to the same conclusions as his fellow dentist Weston Price before him, and this time (unlike Price) he stuck to his own field, dentistry—meaning that the conclusions he kept were the more valid ones.
Another thing he does better than Price is that he contextualizes the information—we don’t need, for example, to be eating seal fat as a main component of our diet, but we do need to be getting sufficient amounts of certain fat-soluble vitamins. And most people aren’t. Same with what’s good or bad for our oral microbiome, and by extension, our saliva, and by extension, our teeth and gums.
There’s a lot of nutritional information in here; macros and micronutrients alike, but the book goes further than that, to also recommend minimally-processed food that requires more chewing, for example. Not just for its nutritional content, but because that helps our teeth move to (and then stay) where they are ideally supposed to be. No amount of perfectly-blended nutritional supplement drink will align your maxilla for you, say. But chomping on raw carrots? Different story.
Dr. Lin offers a 40-day meal plan, but aware that if you’re vegetarian or vegan you’re probably going to have to rethink it yourself using the information he gives, because his meal plan includes animal products.
Bottom line: if you’d like to eat for better oral health (nutritionally, physically, and for your oral microbiome), this book has all the information you’ll need.
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Unleashing My Superpowers – by Dr. Patience Mpofu
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Dr. Patience Mpofu is on a mission to provide women and girls with the inside-information, knowledge, resources, and strategies to break through the glass ceiling. She writes from her experience in STEM, but her lessons are applicable in any field.
Her advices range from the internal (how to deal with imposter syndrome) to the external (how to overcome cultural biases); she also explains and illustrates the importance of both role models and mentors.
While a lot of the book is half instruction manual, half memoir of her incredible life and career (to illustrate her points), and is well-worth reading—and/or perhaps worth gifting to a girl you know with ambitions in STEM?
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What the Most Successful People Do Before Breakfast – by Laura Vanderkram
10almonds is reader-supported. We may, at no cost to you, receive a portion of sales if you purchase a product through a link in this article.
First, what this is not:this is not a rehash of “The 5AM Club”, and nor is it a rehash of “The Seven Habits of Highly Effective People”.
What it is: packed with tips about time management for real people operating here in the real world. The kind of people who have non-negotiable time-specific responsibilities, and frequent unavoidable interruptions. The kind of people who have partners, families, and personal goals and aspirations too.
The “two other short guides” mentioned in the subtitle are her other books, whose titles start the same but instead of “…before Breakfast”, substitute:
- …on the Weekend
- …at Work
However, if you’re retired (we know many of our subscribers are), this still applies to you:
- The “weekend” book is about getting the most out of one’s leisure time, and we hope you have that too!
- The “work” book is about not getting lost in the nitty-gritty of the daily grind, and instead making sure to keep track of the big picture. You probably have this in your personal projects, too!
Bottom line: if, in the mornings, it sometimes seems like your get-up-and-go has got up and gone without you, then you will surely benefit from this book that outstrips its competitors in usefulness and applicability.
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Spinach vs Chard – Which is Healthier?
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Our Verdict
When comparing spinach to chard, we picked the spinach.
Why?
In terms of macros, spinach has slightly more fiber and protein, while chard has slightly more carbs. Now, those carbs are fine; nobody is getting metabolic disease from eating greens. But, by the numbers, this is a clear, albeit marginal, win for spinach.
In the category of vitamins, spinach has more of vitamins A, B1, B2, B3, B5, B6, B9, E, and K, while chard has more of vitamins C and choline. An even clearer victory for spinach this time.
When it comes to minerals, spinach has more calcium, copper, iron, magnesium, manganese, phosphorus, selenium, and zinc, while chard has more potassium. Once again, a clear win for spinach.
You may be wondering about oxalates, in which spinach is famously high. However, chard is nearly 2x higher in oxalates. In practical terms, this doesn’t mean too much for most people. If you have kidney problems or a family history of such, it is recommended to avoid oxalates. For everyone else, the only downside is that oxalates diminish calcium bioavailability, which is a pity, as spinach is (by the numbers) a good source of calcium.
However, oxalates are broken down by heat, so this means that cooked spinach (lightly steamed is fine; you don’t need to do anything drastic) will be much lower in oxalates (if you have kidney problems, do still check with your doctor/dietician, though).
All in all, spinach beats chard by most metrics, and by a fair margin. Still, enjoy either or both, unless you have kidney problems, in which case maybe go for kale or collard greens instead!
Want to learn more?
You might like to read:
Make Your Vegetables Work Better Nutritionally ← includes a note on breaking down oxalates, and lots of other information besides!
Enjoy!
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The 4 Best Stretches To Do Before Bed (And Even: To Do In Bed!)
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Contrary to the stereotype of early morning yoga sessions, the evening is actually the best time to improve flexibility.
Not only that, but there are benefits to stretching on a soft surface, such as your bed, rather than the floor—in few words, it reduces the nervous feedback that limits your flexibility.
The most comfortable yoga session
Here are three great stretches to do of an evening:
Frog pose:
- Spread your knees wide, forming 90° angles at your ankles, knees, and hips.
- Press your hips downward and experiment with tilting your tailbone upwards.
- Hold for 1–3 minutes, breathing calmly.
Half straddle stretch:
- This stretch is done with one leg extended, and your other leg bent with foot against your inner thigh.
- Keep your lower back elongated while folding forward.
- Adjust the stretch’s focus by moving towards the middle or towards the extended leg, to stretch your inner thighs more or your hamstrings more, respectively.
- Hold for 1–2 minutes per leg.
Tabletop chest stretch:
- From a tabletop position, walk/slide your hands forward and drop your chest down.
- Hold for at least 1 minute, breathing deeply.
- Variations:
- Turn thumbs upward to engage side muscles.
- Cross arms to stretch the ribs.
Cross-legged forward fold:
- Start in a cross-legged seated position and slightly shift your hips backwards.
- Fold forward, allowing the spine to round.
- Hold for 1–3 minutes, breathing calmly.
This latter is especially good despite its simplicity, as it provides a deep stretch in the outer hips and lower back.
For more on all of these plus visual demonstrations, enjoy:
Click Here If The Embedded Video Doesn’t Load Automatically!
Want to learn more?
You might also like:
Over 50? Do These 3 Stretches Every Morning To Avoid Pain
Take care!
Don’t Forget…
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