India, April 20 -- We all think obesity is caused by eating too much and exercising too little. But the latest research is turning those assumptions on their head.

The series, The Truth About Obesity looks at groundbreaking new treatments: from faecal transplants to the hunger-hormone injection that might eliminate obesity forever. A time-travelling experiment reveals how people are more obese than we were in the '70s - despite eating fewer calories and doing the same amount of exercise. It reflects upon how a combination of fast food culture and genes have led to our expanding waistlines. However, known for Eat Well For Less ?, Chris Bavin reveals how small changes can help us all maximise our chances of keeping trim. It shows how a sim...