When launched, Coca-Cola's two key ingredients were cocaine and caffeine. The cocaine was derived from the coca leaf and the caffeine from kola nut, leading to the name Coca-Cola (the "K" in Kola was replaced with a "C" for marketing purposes).
Coca – cocaine
Pemberton called for five ounces of coca leaf per gallon of syrup, a significant dose; in 1891, Candler claimed his formula (altered extensively from Pemberton's original) contained only a tenth of this amount. Coca-Cola once contained an estimated nine milligrams of cocaine per glass. In 1903, it was removed.
After 1904, instead of using fresh leaves, Coca-Cola started using "spent" leaves – the leftovers of the cocaine-extraction process with trace levels of cocaine. Coca-Cola now uses a cocaine-free coca leaf extract prepared at a Stepan Company plant in Maywood, New Jersey. In the United States, the Stepan Company is the only manufacturing plant authorized by the Federal Government to import and process the coca plant, which it obtains mainly from Peru and, to a lesser extent, Bolivia.
Kola nuts – caffeine
Kola nuts act as a flavoring and the source of caffeine in Coca-Cola. Kola nuts contain about 2.0 to 3.5% caffeine, are of bitter flavor and are commonly used in cola soft drinks. In