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"Sugar V Fat" on BBC Earth

Photo Credit: BBC Earth

Photo Credit: BBC Earth

It is the hottest questions in nutrition. Which is worse for us – fat or sugar? Sugar V Fat investigates and the results are surprising and unsettling…

In this programme, twin doctors Chris and Xand Van Tulleken go on a month-long diet. For four weeks, Xand only eats foods with a high sugar content like breads, pasta, rice, potatoes, sweets and fizzy drinks, while Chris lives on high-fat foods, consuming as much butter, cheese, meat, burgers, cream and mayonnaise as he wants.

Over the course of their diet, they test how their minds and bodies cope with just eating fat or just sugar.

From trading shares to a cycling race, the results are surprising and fascinating. By the end of the diet, both have lost weight, but Chris has also increased his chances of developing diabetes, while Xand has increased his insulin production.

But they also discover that in the debate about fat and sugar, the real enemy might have been hiding in plain sight. A study with cheesecake eating rats has revealed that the combination of these two ingredients is so bad for our health. And what’s worse, is it’s highly addictive.

We now know our enemy – it’s not fat and it’s not sugar. It’s the deadly mixture of fat and sugar combined.

BBC Earth is on Starhub Channel 407.

Earlier Event: January 7
"The Truth about Fat" on BBC Earth
Later Event: January 10
"Lands of the Monsoon" on BBC Earth