Auburn University researchers analyzed a slew of carbonated soft drink brands to measure the actual caffeine content. They report their data on more than 100 beverages in the current issue of the Journal of Food Science. The table below is excerpted from a summary of the research published by Science News.
From the Science News article:
Although colas have a reputation for their nerve-jolting caffeine, citrus-flavored drinks actually offered substantially more of the stimulant. Diet and regular colas typically delivered 30 to 34 milligrams of caffeine per 12-ounce (0.35-liter) serving, whereas regular and diet citrus drinks provided an average of 50 and 55 mg, respectively. The soft drinks richest in caffeine in the entire survey were both citrus beverages: Vault Zero at 74 mg per serving and Diet SunDrop at 71.5 mg...
Because few soft drink labels report how much caffeine a beverage contains, the researchers recommend that manufacturers start reporting – and posting – these values prominently so that consumers can look for drinks that will offer the amount of caffeine they seek.
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