The phloem carries sugars and other nutrients produced during photosynthesis to different parts of the plant, including the developing fruit. You may have seen claims that banana strings are packed with vitamins and should never be removed because they're far healthier than the rest of the fruit. If you've noticed that some bananas are easier to peel cleanly than others, you're not imagining it. Some bananas shed the strings neatly with the peel, while others leave more behind. Also Read: The fruits your gut wishes you ate every dayWhether you eat the strings or not, bananas remain a nutritious snack.