i think people add caffeine too soft drinks to make it more addicting.
caffeine
Caffeine is a stimulant that can cause an elevated heart rate and increases alertness. Cola soft drinks that are decaffeinated do not have any caffeine added to them.
caffeine
because of all the caffeine and sugar that is in them
Caffeine is found naturally in coffee, tea, and chocolate. Colas and some other soft drinks contain it.
Coffee...tea...chocolate and many soft drinks such as Coke and Mountain Dew. some aspirins contain caffeine too
Mountain dew
caffeine
caffeine
Many soft drinks contain caffeine some examples are Coca Cola, Pepsi Cola and Mountain Dew. "Energy" drinks also contain caffeine. Just read labels.
Delete all caffeine from your diet: coffee, soft drinks, & chocolate.