Yeah I used to do 2-4 2-liters per day before I gave it up around 12 years ago. I’m hoping that, to the extent it does damage, the effect stops when you stop drinking it.
As far as I've read, our coke zero has a lot of added phosporus or a source of, it seems to somehow bind to calcium leading to perhaps bone loss.
I had an injury I thought was unrelated, but could be. Premature ankle joint wear. On inspection from a CAT scan machine, I was told I seem to have some abrasions on the bone around the damaged area, likely from or similar to osteoporosis and/or osteoarthritis.