Fat from certain foods including ice cream and burgers goes straight to the brain and tells you to eat more, new research reveals.
It triggers messages that are sent to the body's cells, warning them to ignore appetite-suppressing hormones that regulate our weight. The effect can last for a few days sabotaging efforts to get back to a healthy diet afterwards, the study found. The study shows for the first time how particular products can create a vicious cycle of food bingeing.
Lead author Dr Deborah Clegg of the study by UT Southwestern Medical Centre in Dallas, said: "Normally, our body is primed to say when we have had enough, but that does not always happen when we are eating something good. What we have shown is that someone's entire brain chemistry can change in a very short period of time. Our findings suggest that when you eat something high in fat, your brain gets 'hit' with the fatty acids, and you become resistant to insulin and leptin. Since you are not being told by the brain to stop eating, you overeat."