The key to solving the obesity crisis could be eliminating certain genes which make people more likely to crave junk food and be overweight.
Scientists have so far found that about 100 genes are linked to obesity, and that craving food is hardwired in peoples brains as eating fats and sugars activates the reward centres in the human brain,
Rob DeSalle, an evolutionary biologist at the American Museum of Natural History in New York, told American science website Gizmodo that eliminating the cravings for junk foods could take a while.
Health conditions associated with a poor diet mostly affect middle-aged adults, who have probably already had children and passed their genes on, he said.
The full article on junk food cravings is available here.