2. Watermelon: Watermelon, while refreshing, has a high GI. It is best consumed in very small amounts if at all, as it can lead to rapid increases in blood glucose levels.

3. Mango: Mangoes are rich in sugar and carbohydrates. Though they are packed with nutrients, their high GI can be a concern for those managing diabetes.

4. Banana: Ripe bananas have a high sugar content. Opt for less ripe bananas if you enjoy this fruit, as they have slightly lower sugar levels.

5. Dates: Dates are very sweet and dense in calories and carbohydrates, which can cause significant spikes in blood sugar levels.