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Originally called Brad's Drink, the beverage was first marketed as a digestive aid and energy booster. It was renamed Pepsi-Cola because of its pepsin and kola nut content.
Credit: ken fager CC-BY-2.0. The Pepsi Cola company was founded by Caleb Bradham in 1903. Bradham was a pharmacist in North Carolina who created Brad's drink in 1893 out of carbonated water, sugar, vanilla, rare oils, pepsin and cola nuts. The drink was renamed Pepsi Cola after the pepsin and cola nuts in it.