Hyderabad: Vibrant red tandoori chicken, chicken 65, popular Shaadi Wala red chicken curry, reddish gobi manchurian or the rich orange-yellow biryani that you order in restaurants might look appetising on the plate. However, behind the mouth-watering colours that make food visually appealing lies a less savoury truth - synthetic food colours which put public health at risk including cancer. The task force teams of Telangana Commissioner of Food Safety have uncovered widespread use of synt