In today’s episode of What’s Good For You, Leila looks at the dangerous world of teenagers and weight loss when a diet can turn into a disaster. In another test, brave volunteers down the beers to see if there is such a thing as beer goggles and Slats hits the takeaway to find out if plastic containers are contaminating our food. Is exercise ruining your health? Dr Andrew Rochford hits the track to discover if you can get too much of a good thing and new presenter Giaan Rooney puts her grey matter to the test to see if you are born smart or if you can increase your IQ.