If you’re someone who likes to buy up big at the candy bar before seeing a film, then a word of warning about That Sugar Film: this story of one man’s 60-day sugar binge is guaranteed to leave your choc top melted in your hand and your box of Maltesers left unopened.
Sugar is today’s number one dietary demon, and not without reason. While nutrition scientists may debate the harms – or not – of saturated fat, sugar is one food we can all unite over. And happily acknowledge we eat too much of the stuff.
In this latest instalment of food self-experimentation, Australian actor Damon Gameau set out to eat food containing the equivalent of 40 teaspoons (about 160 grams) of sugar every day for 60 days. But there’s a twist: it could only come from foods people may think of as healthy.
Sugar, sugar everywhere
Why 40 teaspoons of sugar a day? Well, because that’s the amount of sugar the average Australian between the ages of 19 and 30 eats every day. But the problem with using this estimate is that it includes all forms of sugar, including what’s found naturally in fruit, fruit products and milk.
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While using 40 teaspoons of white sugar paints a sensational picture, it’s not an entirely correct one. The actual amount of added sugar we eat is well short of 160 grams; it’s more like 66 grams or about 16 teaspoons a day for the average adult.
Gameau documents the adverse effect switching from a healthy diet to a high-sugar diet had on his weight, mood and health. He claims he gained weight despite eating the same amount of food he ate before his high-sugar experiment, but provides only a very superficial attempt to estimate how much it was. That raises questions about the reliability of the claim.
Bad sweeties
So, is there something insidious about sugar calories that can lead to greater weight gain? Not really. Sugar, including fructose, is not inherently fattening relative to other foods. Its effect on body weight is from the extra energy it adds to our diets, that’s all.
But there’s more to this. What can make sugar fattening is the context it’s normally eaten in. Sugar increases the energy density of food and makes it more palatable and desirable. This means people are likely to end up eating more of the foods with a lot of added sugar than is good for them.
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The documentary also asks whether sugar is an inherently addictive substance. If you’re a rat, then sugar would most certainly be your drug of choice. But in humans the science is, at best, hazy. The thing to remember is that eating is addictive – just try going a day without food.