Some diabetics may advise against consuming bananas due to their relatively higher natural sugar content compared to other fruits. Bananas contain natural sugars, such as fructose, which can affect blood sugar levels. However, the impact can vary depending on factors such as portion size, individual metabolism, and overall dietary habits. It's important for individuals with diabetes to monitor their carbohydrate intake, including sugars from fruits like bananas, and to work with a healthcare professional or registered dietitian to create a personalized meal plan that aligns with their specific needs and blood sugar management goals.