Why do we love and hate different tastes?

Why do people like one type of food and really dislike another? How much are our responses to food, including putting on weight, influenced by genetics?

And could the taste of food be chemically re-engineered to appeal to particular groups, such as the elderly?

A unique summit of some of the world's leading chefs, including Heston Blumenthal, and top scientists, including Sir Stephen O'Rahilly, put our complicated relationship with food under the microscope.

Sean Coughlan reports for BBC Radio 4's PM programme.