Are You A Calorie-Burning Machine?
Calorie myths debunked: the precise nature of calories, the fallacy of “a calorie is a calorie,” and the truth about calorie-restricted diets for weight loss.
Burn, Calorie, Burn
In Tuesday’s newsletter, we asked you whether you count calories, and got the above-depicted, below-described set of answers:
- About 56% said “I am somewhat mindful of calories but keep only a rough tally”
- About 32% said “I do not count calories / I don’t think it’s important for my health”
- About 13% said “I rigorously check and record the calories of everything I consume”
So what does the science say, about the merits of all these positions?
A food’s calorie count is a good measure of how much energy we will, upon consuming the food, have to use or store: True or False?
False, broadly. It can be, at best, a rough guideline. Do you know what a calorie actually is, by the way? Most people don’t.
One thing to know before we get to that: there’s “cal” vs “kcal”. The latter is generally used when it comes to foodstuffs, and it’s what we’ll be meaning whenever we say “calorie” here. 1cal is 1/1000th of a kcal, that’s all.
Now, for what a calorie actually is:
A calorie is the amount of energy needed to raise the temperature of 1 liter of water by 1℃
Question: so, how to we measure how much food is needed to do that?
Answer: by using a bomb calorimeter! Which is the exciting name for the apparatus used to literally burn food and capture the heat produced to indeed raise the temperature of 1 liter of water by 1℃.
If you’re having trouble imagining such equipment, here it is:
Bomb Calorimeter: Definition, Construction, & Operation (with diagram and FAQs)
The unfortunate implication of the above information
A kilogram of sawdust contains about a 1000 kcal, give or take what wood was used and various other conditions.
However, that does not mean you can usefully eat the sawdust. In other words:
Calorie count tells us only how good something is at raising the temperature of water if physically burned.
Now do you see why oils and sugars have such comparably high calorie counts?
And while we may talk about “burning calories” as a metaphor, we do not, in fact, have a little wood stove inside us burning the food we eat.
A calorie is a calorie: True or False?
Definitely False! Building on from the above… We will get very little energy from sawdust; it’s not just that we can’t use it; we can’t store it either; it’ll mostly pass through as fiber.
(however, please do not use sawdust to get your daily dose of fiber either, as it is not safe for human consumption and may give you diseases, depending on what is lurking in it)
But let’s look at oil and sugar, two very high-calorie categories of food, because they’re really easy to physically burn and they give off a good flame.
A bomb calorimeter may treat them quite equally, but to our body, they are metabolically very different indeed.
For a start, most sugars will get absorbed and processed much more quickly than most oils, and that can overwhelm the liver (responsible for glycogen management), and lead to non-alcoholic fatty liver disease, diabetes, and more. Metabolic syndrome in general, and if you keep it up too much and you may find it’s now a lottery between dying of NAFLD, diabetes, or heart disease (it’ll usually be the heart disease that kills).
See also:
- Which Sugars Are Healthier, And Which Are Just The Same?
- 10 Ways To Balance Blood Sugars
- How To Unfatty A Fatty Liver
Meanwhile, we know all about the different kinds of nutritional profiles that oils can have, and some can promote having high energy without putting on fat, while others can strain the heart. Not even “a fat is a fat”, so “a calorie is a calorie” doesn’t get much mileage outside of a bomb calorimeter!
See also:
A calorie-controlled / calorie-restricted diet is an effective weight loss strategy: True or False?
True, usually! Surprise!
- On the one hand: calories are a wildly imprecise way to reckon the value of food, and using them as a guide to health can be dangerously misleading
- On the other hand: the very activity of calorie-counting itself promotes mindful eating, which is very good for the health
There is a strong difference between the mind of somebody who is carefully logging their pre-bedtime piece of chocolate and reflecting on its nutritional value, vs someone who isn’t sure whether this is their second or third glass of wine, nor how much the glass contained.
So if you want to get most of the benefits of a calorie-controlled diet without counting calories, you may try taking a “mindful eating” approach to diet.
However! If you want to do this for weight loss, be aware, that you will have to practice it all the time, not just for one meal here and there.
You can read more on how to do “mindful eating” here:
Dr. Rupy Aujla: The Kitchen Doctor | Mindful Eating & Interoception
Take care!
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Stop Cancer 20 Years Ago
Dr. Jenn Simmons shares vital tips on preventing cancer and inflammation, advocating for lifestyle changes and proactive health management at any age.
Get Abreast And Keep Abreast
This is Dr. Jenn Simmons. Her specialization is integrative oncology, as she—then a breast cancer surgeon—got breast cancer, decided the system wasn’t nearly as good from the patients’ side of things as from the doctors’ side, and took to educate herself, and now others, on how things can be better.
What does she want us to know?
Start now
If you have breast cancer, the best time to start adjusting your lifestyle might be 20 years ago, but the second-best time is now. We realize our readers with breast cancer (or a history thereof) probably have indeed started already—all strength to you.
What this means for those of us without breast cancer (or a history therof) is: start now
Even if you don’t have a genetic risk factor, even if there’s no history of it in your family, there’s just no reason not to start now.
Start what, you ask? Taking away its roots. And how?
Inflammation as the root of cancer
To oversimplify: cancer occurs because an accidentally immortal cell replicates and replicates and replicates and takes any nearby resources to keep on going. While science doesn’t know all the details of how this happens, it is a factor of genetic mutation (itself a normal process, without which evolution would be impossible), something which in turn is accelerated by damage to the DNA. The damage to the DNA? That occurs (often as not) as a result of cellular oxidation. Cellular oxidation is far from the only genotoxic thing out there, and a lot of non-food “this thing causes cancer” warnings are usually about other kinds of genotoxicity. But cellular oxidation is a big one, and it’s one that we can fight vigorously with our lifestyle.
Because cellular oxidation and inflammation go hand-in-hand, reducing one tends to reduce the other. That’s why so often you’ll see in our Research Review Monday features, a line that goes something like:
“and now for those things that usually come together: antioxidant, anti-inflammatory, anticancer, and anti-aging”
So, fight inflammation now, and have a reduced risk of a lot of other woes later.
See: How to Prevent (or Reduce) Inflammation
Don’t settle for “normal”
People are told, correctly but not always helpfully, such things as:
- It’s normal to have less energy at your age
- It’s normal to have a weaker immune system at your age
- It’s normal to be at a higher risk of diabetes, heart disease, etc
…and many more. And these things are true! But that doesn’t mean we have to settle for them.
We can be all the way over on the healthy end of the distribution curve. We can do that!
(so can everyone else, given sufficient opportunity and resources, because health is not a zero-sum game)
If we’re going to get a cancer diagnosis, then our 60s are the decade where we’re most likely to get it. Earlier than that and the risk is extant but lower; later than that and technically the risk increases, but we probably got it already in our 60s.
So, if we be younger than 60, then now’s a good time to prepare to hit the ground running when we get there. And if we missed that chance, then again, the second-best time is now:
See: Focusing On Health In Our Sixties
Fast to live
Of course, anything can happen to anyone at any age (alas), but this is about the benefits of living a fasting lifestyle—that is to say, not just fasting for a 4-week health kick or something, but making it one’s “new normal” and just continuing it for life.
This doesn’t mean “never eat”, of course, but it does mean “practice intermittent fasting, if you can”—something that Dr. Simmons strongly advocates.
See: Intermittent Fasting: We Sort The Science From The Hype
While this calls back to the previous “fight inflammation”, it deserves its own mention here as a very specific way of fighting it.
It’s never too late
All of the advices that go before a cancer diagnosis, continue to stand afterwards too. There is no point of “well, I already have cancer, so what’s the harm in…?”
The harm in it after a diagnosis will be the same as the harm before. When it comes to lifestyle, preventing a cancer and preventing it from spreading are very much the same thing, which is also the same as shrinking it. Basically, if it’s anticancer, it’s anticancer, no matter whether it’s before, during, or after.
Dr. Simmons has seen too many patients get a diagnosis, and place their lives squarely in the hands of doctors, when doctors can only do so much.
Instead, Dr. Simmons recommends taking charge of your health as best you are able, today and onwards, no matter what. And that means two things:
- Knowing stuff
- Doing stuff
So it becomes our responsibility (and our lifeline) to educate ourselves, and take action accordingly.
Want to know more?
We recently reviewed her book, and heartily recommend it:
The Smart Woman’s Guide to Breast Cancer – by Dr. Jenn Simmons
Enjoy!