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A typical can of cola or one 12-fluid-ounce serving contains 44–62 mg of phosphoric acid, which can interfere with bone absorption of calcium and cause the leaching of calcium from bones to help neutralise the acid.

Tucker, the study's corresponding author, explains this well:
"Physiologically, a diet low in calcium and high in phosphorus may promote bone loss, tipping the balance of bone remodeling toward calcium loss from the bone. Although some studies have countered that the amount of phosphoric acid in cola is negligible compared to other dietary sources such as chicken or cheese, further controlled studies should be conducted to determine whether habitual cola drinkers may be adversely affecting their bone health by regularly consuming doses of phosphoric acid that do not contain calcium or another neutralizing ingredient."