Where once fat was the much maligned enemy, now scientists are turning their attention to sugar.
It is now widely accepted that more must be done to encourage people to reduce their sugar intake.
So much so that dietary guidelines in the UK and US have been altered to reflect the changing scientific evidence.
The World Health Organization recommends no more than 10 per cent of a person's daily energy should come from added sugars, or those found naturally in juices and honey.
That equates to around 50g or 12 teaspoons a day.
While the links between a high-sugar diet and obesity are well documented, in light of the mounting evidence, experts are turning their attention to the other ways sugar can affect the body.