Nearly two-thirds of Australian adults are overweight or obese.It is little wonder that 1 in 3 people go on a diet every year. We explore three popular weight-loss diets: Paleo, Atkins and the Low Carb, High Fat diet, and examine what they mean for the over fifties age group. Kulasegaram Sanchayan reports in Tamil with a feature prepared by Amy Chien Yu-Wang.