Obesity and type-2 diabetes are challenging health issues for many modern cultures — and yet the medical advice we're often given is outdated and not based in real research. What diet is best for long-term weight control? Jennie Brand-Miller and her colleagues have embarked on a world-wide study to find out.

Professor Jennie Brand-Miller from the University of Sydney's School of Molecular Biochemistry and Charles Perkins Centre, speaking to students at the 38th Professor Harry Messel International Science School, ISS2015: BIG — The University of Sydney, Australia, July 2015

For more about the ISS: http://sydney.edu.au/science/iss