YogaTone trainer Andrea Cirignano; Stephania Greco, a personal trainer and group fitness instructor with 24 Hour Fitness; and celebrity trainer John Damon, who works with Whitney Port and Kristin Cavallari, say that soda should be eliminated from everyone's diets — this includes diet soda. For John, soda just doesn't make sense: "It has no redeeming qualities." We couldn't agree with them more. Drinking soda has been linked to several health issues like dental decay, bone loss, and hypertension. It's also loaded with sugar — not a good thing for any healthy diet. Diet soda doesn't fare much better: studies link the consumption of diet soda to both weight gain and stroke risk.