My mother drank Coke since she was a teen. She had osteoporosis and osteoarthritis at a young age (40s). A physician I worked for explained to me why my mother probably developed issues so young.Carbonated drinks aren't good for anyone. They leech calcium from the body (bones,teeth), quickening the onset of Osteopenia, and Osteoporosis, and contribute to dental issues.
Carbonated drinks contain phosphorus. Your body needs to balance calcium and phosphorus so if you consume a lot of soda, your body will release calcium from your teeth and bones until the phosphorus and calcium are in balance.