Jan 29, But that doesn't mean the banana is the better choice. Most people don't Surprising Signs You're Eating Too Much Sugar (Gallery). Related. Jul 21, Bananas do contain carbs that can raise blood sugar, but they also have based on how much and how quickly they raise blood sugar levels. Dec 19, We all know that too much sugar can have some seriously negative effects on our health, but what's the deal with fruit? Strawberries, bananas. Are Bananas Good For You or Are They Too High in Sugar?