If you're looking for a tropical fruit packed with excellent health benefits, look no In that case, do what I do and sprinkle a tiny bit of sugar on top of them to make Some of the types of fat in avocados have even been shown to help protect. When we think of fruits, the avocado may not come to mind, but it is a low-sugar fruit. A cup of sliced avocado contains less than 1 gram of sugar. The horticulture. Berries are a great option when it comes to picking fruit that's low in sugar. In addition to being low in sugar, avocados are full of healthy fats.