If you don' believe it, try eating a familiar food in the dark. The colors used in foods and beverages come from both natural and synthetic sources. Caffeine Caffeine is a substance that occurs naturally in more than 60 plants including coffee beans, tea leaves, kola nuts and coca beans. In some cases, small amounts of caffeine are added to soft drinks as part of the flavor profile. The amount of caffeine in a soft drink is only a fraction of that found in an equal amount of coffee or tea.
Caffeine has a classic bitter taste that enhances other flavors.
Even though some people feel the effects of caffeine are harmful, scientific research has refuted these claims. The long history of caffeine's use confirms that it is safe when consumed in moderation. For people who wish to restrict their caffeine intake, many caffeine-free soft drinks are available. Acidulants Similar to fruit juices and many other food products, most soft drinks are slightly acidic. Acidulants add a pleasant tartness to soft drinks and act as a preservative.