Ruben Meerman Discusses the Mathematics of Weight Loss at TEDxQUT Transcript

In this TEDxQUT talk, titled “Mathematics of Weight Loss”, Ruben Meerman, a reporter on ABC television’s Catalyst program and Play School’s first ever ‘resident scientist’, answers the question: When you lose weight, where does it go?

 

 

All right. Well I might get myself into a position here. And on the red carpet. I don’t think I need to introduce myself, do I? But this is the last talk for the day.

We will have a little bit of wrap up after this. And we’ll have a little time to reflect and maybe some questions. I know that some of you will want to get home. But let’s get cracking, because we’ve got about 12 minutes. My talk maybe might go for 15, so don’t panic if that thing goes over.

Here we go, the mathematics of weight loss. Well, let me start with this. Last year, I went surfing in Fiji. And the resort had a photographer following us around, taking photos. Which is really great, except that I couldn’t help but notice this.

Somehow, I’d managed to become five kilograms overweight. Couldn’t believe my eyes. So I did what they tell you to do, I ate less and I moved more. And within just three months, I discovered that I’d lost six kilograms. So then I did what a normal person does. I did physics, but anyone would do this. I graphed my weight.

And when I did the linear regression, I discovered that, lo and behold, on average I’d been losing 85 grams a day. Which got me thinking, in fact it got me very curious about this question that I’ve since discovered most people have no clue about. In fact they’ve never even thought about this.

And to prove my point, I’ve made a little video on Bondi Beach. And the question was this: When somebody loses weight, where does it go? What does it become? How does it get out of your body? You’re probably dumbstruck by the question.

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These people were, so listen to this. Where does it go? Where does the weight go? Where does it go? Um. Um. Um. Well… Well… I don’t know. – I don’t know. That, I don’t know. I don’t have an answer for that. These are the mysteries of science. I have no idea.

I’d like to say into the ether. Into the ether? Ether? It gets used up. The universe. Another dimension. It doesn’t go anywhere.

When she loses it, it comes over to me. It becomes nothing. It doesn’t exist anymore I guess. That’s a very good question. Good question. What a fascinating question.

What would you say? It goes right in the crapper, mate. Sweat. Moisture. And sweat. It evaporates. Out of your ass. It’s poo. Ends up on Bondi Beach. That’s were it goes.

Well, basically, you burn it up as energy. You burn it as energy? Heat energy. Burnt. Energy. Burn it as energy.

 

So, what the heck is going on? We’re in the middle of an obesity epidemic. I don’t need to tell you about it. So why don’t these people know the answer to this fundamental question? Because not one of them was right. And we do know the answer.

This is not ground-breaking stuff I’m about to tell you. So let me just remind you of a few things you do know.

What’s the chemical formula for water? H2O. Chemical formula for carbon dioxide? You all know it. CO2. Right, so you know what human fat is made of. So what is the chemical formula for human fat? There is such a thing, believe it or not, it’s been known since the 60’s. It’s C55 H104 O6. That’s the chemical formula for the average fat molecule in a human body.

Some of the molecules might have a few more carbon atoms and hydrogen. Some might have less. They all have just six oxygen atoms. That’s very important and helpful for later. But this is the average fat molecule. C55 H104 O6.

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So let’s be very clear about this. The difference between that…and that…is C55 H104 O6. I kid you not.

And the difference between that… and that? Same thing, C55 H104 O6.

So how does this stuff get out of a human body? Well, here’s the general equation. Looks pretty interesting, slightly complicated. Not if you’ve done some year-ten chemistry. Surely this is year ten chemistry. Well, it’s not, really. But here’s what it says.

Fat + oxygen => carbon dioxide and water.

That’s what it becomes. Biochemists have known this for ages. You inhale that. You exhale that. That’s what happened to it. Amazing.

Now that little arrow there is kind of oversimplifying something called Biochemistry. That’s three years at university. My apologies to the biochemists. I don’t mean to oversimplify. But I’m trying to get to the crunch. It’s really complicated. It doesn’t just come out of you for no reason. You’ve got to do stuff. Eat less, move more. We’ll come to that in a minute.

Look, when you lose weight, you want to lose kilograms. That’s all kilograms. All the stuff there. So why do people say heat? It burns up as energy. Because that’s what we’ve been telling them all this time. And it’s very confusing because energy has different units, kilojoules, or you might use calories. And yes, that’s heat. That’s motion, when you move. Or it’s thinking. Your brain needs energy. Or it’s growing. But that’s not where the fat goes.

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