The weight gain and bone mass loss balances itself out over time. Nothing to worry about, except for that stuff about cancer.
Back in high school, i worked at Target @ 4 a.m. So i'd wake up and drink almost 2 liters of Dr. Pepper. Did that for about a year till i started getting bad headaches and my sides were cramping up. The doctor told me I was killing my liver and kidneys so i haven't touched soda since.
i will just stick to beer....its better for you anyway. ask your doctor if he would rather you drink beer or soda... beer wins everytime