Carbohydrates don't just screw up your blood-sugar: they release free radicals that kill appetite-suppressing cells. The research is from a Nature article by Dr Zane Andrews, a neuroendocrinologist with Monash University's Department of Physiology.

"The more carbs and sugars you eat, the more your appetite-control cells are damaged, and potentially you consume more," Dr Andrews said.

Dr Andrews said the attack on appetite suppressing cells creates a cellular imbalance between our need to eat and the message to the brain to stop eating.

"People in the age group of 25 to 50 are most at risk. The neurons that tell people in the crucial age range not to over-eat are being killed-off.