Although some nutritional facts about soft drinks are listed on their labels, exact caffeine content is not  Listing exact caffeine content would make it easier to limit, but not eliminate, one' s caffeine intake
If it became easier for people to limit, but not eliminate, their caffeine intake, many people would do so, which would improve their health
Many people will find it difficult to eliminate their caffeine intake if they have to guess exactly how much caffeine is in their soft drinks.