Australian director Damon Gameua was a fit man before he took on a task many probably thought would have increased his health and wellbeing.

Instead, he received an unsettling warning from his GP, experienced dire mood swings and weight gain after taking on the low-fat, high-sugar health food diet for 60 days.

“I had no soft drink, chocolate, ice cream or confectionery,” Gameau told Yahoo of his project That Sugar Film – a sort of reverse documentary version of Morgan Spurlock’s famed Super Size Me, in which he eats nothing but MacDonald’s.

“All the sugars that I was eating were found in perceived healthy foods, so low-fat yogurts, and muesli bars, and cereals, and fruit juices, sports drinks... These kind of things that often parents would give their kids thinking they’re doing the right thing.”

Except within just three weeks, Gameau’s doctor told him he had already begun to develop fatty liver disease – the most severe of outcomes of which is liver failure. The physician also branded his level of mental functioning “unstable”.

According to News.com.au, Gameau consumed 40 teaspoons of sugar a day on average – slightly more of that of the average teenager worldwide.

The World Health Organization (WHO) indicates that a healthy adult should aim to include no more than 25grams of sugar a day, or six teaspoons.

Far from the giant Big Mac burger of Spurlock’s final meal, Gameau’s last dish of the project was more akin to that of a child’s school lunchbox – a jam sandwich, fruit juice, a biscuit bar and a handful of snacks.

10 food and drinks with hidden sugar highs Show all 10 1 /10 10 food and drinks with hidden sugar highs 10 food and drinks with hidden sugar highs Hovis Wholemeal Medium Energy (kcal) per portion (40g): 88 Teaspoons of sugar: Half a teaspoon - and some breads can be up to a whole spoon per portion 10 food and drinks with hidden sugar highs Starbucks caramel Frappuccino with whipped cream / Skimmed Milk Energy (kcal) per portion: 273 Teaspoons of sugar: 11 10 food and drinks with hidden sugar highs Sharwood's Sweet & Sour Chicken With Rice Energy (kcal) per portion: 420 Teaspoons of sugar: 6 10 food and drinks with hidden sugar highs Solero's exotic ice cream Energy (kcal) per portion: 94 Teaspoons of sugar: 4 10 food and drinks with hidden sugar highs Kellogg's Frosties Energy (kcal) per portion: 172 Teaspoons of sugar: 4 10 food and drinks with hidden sugar highs Glaceau Vitamin Water, Defence Energy (kcal) per portion: 65 Teaspoons of sugar: 4 10 food and drinks with hidden sugar highs Heinz Classic Tomato Soup Energy (kcal) per portion: 171 Teaspoons of sugar: 4 10 food and drinks with hidden sugar highs Ragu Tomato & Basil Pasta Sauce Energy (kcal) per portion: 80 Teaspoons of sugar: 3 10 food and drinks with hidden sugar highs Kellogg's Nutri-Grain Crunchy Oat Granola Cinnamon Bars Energy (kcal) per portion: 186 Teaspoons of sugar: 2 10 food and drinks with hidden sugar highs Heinz Tomato Ketchup Energy (kcal) per portion (just 15ml): 18 Teaspoons of sugar: 1

“They are making an effort yet are horribly let down by the lack of integrity in marketing and packaging strategies.”

However, he went on to explain that findings of his experiment didn’t suggest we needed to cut sugar completely from our diets, but rather be more aware of where it has been added.

“Sugar’s now in 80 per cent of the processed food we’re eating,” he said. “If we can remove that, that’s the first step towards making a change.”

As well as the immediate health effects of consuming excess sugar, links between sugar and a higher risk of developing cardiovascular disease – one of the leading causes of death in the UK – and type 2 diabetes also exist.