Does A&W rootbeer contain phosphoric acid?

I am a longtime Coke (soda) addict. been drinkin it since i was born. I am finally quitting at 17 now and trying to avoid drinks with phosphoric acid to avoid any kidney damage. The bottle for A&W rootbetter doesnt say it contains phosphoric acid OR citric acid. I am just trying to make sure if it really doesnt contain phosphoric acid so my efforts wont be in vain. (citric is fine by me)