Recent research suggests that colas could be compromising your bone health.
Experts believe that drinking soda, especially cola, affects bone density in several ways. People who drink colas are less likely to get enough calcium and vitamin D in their diets, because the soda is replacing more nutritious beverages, and caffeine has been linked to a higher risk of osteoporosis.
A third possible explanation is the phosphoric acid. Phosphoric acid can cause an imbalance in the body, which seeks to neutralize the acid with calcium. If there isn't enough calcium to use, the body will take calcium from the bones.
A study of more than 2,500 people found that cola consumption by women was associated with lower bone mineral density at three hip sites. There was less of a problem with decaffeinated cola, but the findings were similar for diet soft drinks.