Parents of some obese children could save up to £6.58 (about $10) each week by changing their shopping habits and opting for a healthier diet, according to research published in the latest issue of the British Journal of General Practice. The study on the theme of obesity shows that healthier eating does not have to be more expensive, challenging one of the commonly cited barriers to dietary change. The figures showed that healthier eating could cost no more than £2.31 ($4) extra a week, and that in some cases, savings of up to £6.58 ($10) a week could by made by switching.