Evidence suggests health star system having little effect on health

If you've ever glanced at the health star rating on a packet of chips or orange juice - you might be surprised by what you see. For example, a popular chocolate milk has a higher health star rating than some humble regular milk. That might be in part because the scheme is voluntary - and manufacturers get to give themselves their own health star rating. University of Otago public health senior research fellow Dr Cristina Cleghorn spoke to Leiataualesa Susana Lei'ataua.